[Buildroot] [PATCH 28/31] package/kodi-screensaver-rsxs: bump version
Bernd Kuhls
bernd.kuhls at t-online.de
Sun Jun 30 14:05:22 UTC 2019
Signed-off-by: Bernd Kuhls <bernd.kuhls at t-online.de>
---
.../0001-cross-compile.patch | 37 -
.../0001-various-build-fixes.patch | 11435 ++++++++++++++++
.../0002-fix-default-include-dir.patch | 28 -
package/kodi-screensaver-rsxs/Config.in | 6 +-
.../kodi-screensaver-rsxs.hash | 2 +-
.../kodi-screensaver-rsxs.mk | 7 +-
6 files changed, 11443 insertions(+), 72 deletions(-)
delete mode 100644 package/kodi-screensaver-rsxs/0001-cross-compile.patch
create mode 100644 package/kodi-screensaver-rsxs/0001-various-build-fixes.patch
delete mode 100644 package/kodi-screensaver-rsxs/0002-fix-default-include-dir.patch
diff --git a/package/kodi-screensaver-rsxs/0001-cross-compile.patch b/package/kodi-screensaver-rsxs/0001-cross-compile.patch
deleted file mode 100644
index a7b2053d76..0000000000
--- a/package/kodi-screensaver-rsxs/0001-cross-compile.patch
+++ /dev/null
@@ -1,37 +0,0 @@
-Fix cross-compilation
-
-Use the cross-compiler and not the host version.
-
-Patch sent upstream:
-https://github.com/notspiff/screensavers.rsxs/pull/5
-
-Signed-off-by: Bernd Kuhls <bernd.kuhls at t-online.de>
-
-diff -uNr screensavers.rsxs-195e0ec3fbbcb2ee2012cd560e42d05167f0f259.org/CMakeLists.txt screensavers.rsxs-195e0ec3fbbcb2ee2012cd560e42d05167f0f259/CMakeLists.txt
---- screensavers.rsxs-195e0ec3fbbcb2ee2012cd560e42d05167f0f259.org/CMakeLists.txt 2015-03-19 12:20:23.000000000 +0100
-+++ screensavers.rsxs-195e0ec3fbbcb2ee2012cd560e42d05167f0f259/CMakeLists.txt 2015-07-19 20:26:16.660481032 +0200
-@@ -33,6 +33,11 @@
- ${PROJECT_SOURCE_DIR}/${rsxs_dir}/src/skyrocket
- ${PROJECT_SOURCE_DIR}/${rsxs_dir}/src/solarwinds)
-
-+
-+get_filename_component( COMPILER_FILENAME "${CMAKE_C_COMPILER}" NAME )
-+string( REGEX REPLACE "-[^-]+$" ""
-+ TOOLCHAIN_NAME "${COMPILER_FILENAME}" )
-+
- include(ExternalProject)
- set(update_command "")
- if(BOOTSTRAP_IN_TREE OR NOT DEFINED BOOTSTRAP_IN_TREE)
-@@ -46,8 +51,11 @@
- endif()
- endif()
- externalproject_add(rsxs SOURCE_DIR ${PROJECT_SOURCE_DIR}/${rsxs_dir}
-- CONFIGURE_COMMAND ${configure_start}
-+ CONFIGURE_COMMAND gl_cv_func_gettimeofday_clobber=no ac_cv_type__Bool=yes
-+ ac_cv_func_malloc_0_nonnull=yes
-+ ${configure_start}
- --prefix=<INSTALL_DIR>
-+ --host=${TOOLCHAIN_NAME}
- --without-xscreensaver
- --disable-cyclone
- --disable-euphoria
diff --git a/package/kodi-screensaver-rsxs/0001-various-build-fixes.patch b/package/kodi-screensaver-rsxs/0001-various-build-fixes.patch
new file mode 100644
index 0000000000..4b62d3cb2b
--- /dev/null
+++ b/package/kodi-screensaver-rsxs/0001-various-build-fixes.patch
@@ -0,0 +1,11435 @@
+Various build fixes
+
+Downloaded from upstream PR 21 and rebased.
+
+Signed-off-by: Bernd Kuhls <bernd.kuhls at t-online.de>
+
+
+From 40107fae00c39f5d627ecd04047294cda19bd425 Mon Sep 17 00:00:00 2001
+From: Alwin Esch <alwin.esch at web.de>
+Date: Mon, 11 Mar 2019 14:25:01 +0100
+Subject: [PATCH 1/3] update README.md to match right URL's
+
+---
+ README.md | 4 ++--
+ 1 file changed, 2 insertions(+), 2 deletions(-)
+
+diff --git a/README.md b/README.md
+index a0c9d6f..9e12565 100644
+--- a/README.md
++++ b/README.md
+@@ -2,7 +2,7 @@
+
+ This is a collection of [Kodi](http://kodi.tv) screensaver addons.
+
+-[](https://travis-ci.org/notspiff/screensavers.rsxs)
++[](https://travis-ci.org/xbmc/screensavers.rsxs)
+
+ ## Build instructions
+
+@@ -16,7 +16,7 @@ The following instructions assume you will have built Kodi already in the `kodi-
+ suggested by the README.
+
+ 1. `git clone --branch Leia https://github.com/xbmc/xbmc.git`
+-2. `git clone https://github.com/notspiff/screensavers.rsxs.git`
++2. `git clone https://github.com/xbmc/screensavers.rsxs.git`
+ 3. `cd screensavers.rsxs && mkdir build && cd build`
+ 4. `cmake -DADDONS_TO_BUILD=screensavers.rsxs -DADDON_SRC_PREFIX=../.. -DCMAKE_BUILD_TYPE=Debug -DCMAKE_INSTALL_PREFIX=../../xbmc/kodi-build/addons -DPACKAGE_ZIP=1 ../../xbmc/cmake/addons`
+ 5. `make`
+
+From 7361b8d540a51db20df896b315c2ac1ddded3e64 Mon Sep 17 00:00:00 2001
+From: Alwin Esch <alwin.esch at web.de>
+Date: Tue, 19 Mar 2019 18:32:26 +0100
+Subject: [PATCH 2/3] Cleanup and fix multi OS support
+
+---
+ .gitignore | 2 -
+ .travis.yml | 10 +-
+ CMakeLists.txt | 22 +-
+ FindLTDL.cmake | 18 -
+ Jenkinsfile | 2 +-
+ debian/changelog | 7 -
+ debian/compat | 2 +-
+ debian/control | 5 +-
+ depends/common/bz2/CMakeLists.txt | 3 +-
+ depends/common/glm/glm.sha256 | 2 +-
+ depends/common/glm/glm.txt | 2 +-
+ depends/common/imagemagick/CMakeLists.txt | 51 -
+ depends/common/imagemagick/deps.txt | 4 -
+ depends/common/imagemagick/flags.txt | 1 -
+ depends/common/imagemagick/imagemagick.sha256 | 1 -
+ depends/common/imagemagick/imagemagick.txt | 1 -
+ depends/common/jpeg-9b/CMakeLists.txt | 14 -
+ depends/common/jpeg-9b/jpeg-9b.sha256 | 1 -
+ depends/common/jpeg-9b/jpeg-9b.txt | 1 -
+ depends/common/libtool/CMakeLists.txt | 14 -
+ depends/common/libtool/libtool.sha256 | 1 -
+ depends/common/libtool/libtool.txt | 1 -
+ depends/common/png/deps.txt | 1 -
+ depends/common/png/flags.txt | 1 -
+ depends/common/png/png.sha256 | 1 -
+ depends/common/png/png.txt | 1 -
+ depends/common/tiff/CMakeLists.txt | 14 -
+ depends/common/tiff/tiff.sha256 | 1 -
+ depends/common/tiff/tiff.txt | 1 -
+ depends/common/zlib/01-build-static.patch | 36 -
+ depends/common/zlib/zlib.sha256 | 1 -
+ depends/common/zlib/zlib.txt | 1 -
+ depends/osx/glm/glm.sha256 | 2 +-
+ depends/osx/glm/glm.txt | 2 +-
+ lib/ImageMagick/CMakeLists.txt | 63 -
+ src/biof/CMakeLists.txt | 5 +-
+ src/busyspheres/CMakeLists.txt | 5 +-
+ src/colorfire/CMakeLists.txt | 5 +-
+ src/cyclone/CMakeLists.txt | 5 +-
+ src/drempels/CMakeLists.txt | 22 +-
+ src/drempels/TexMgr.cpp | 102 +-
+ src/drempels/stb_image.h | 7547 +++++++++++++++++
+ src/drempels/stb_image_resize.h | 2630 ++++++
+ src/euphoria/CMakeLists.txt | 5 +-
+ src/feedback/CMakeLists.txt | 5 +-
+ src/fieldlines/CMakeLists.txt | 5 +-
+ src/flocks/CMakeLists.txt | 5 +-
+ src/flux/CMakeLists.txt | 5 +-
+ src/helios/CMakeLists.txt | 5 +-
+ src/hufosmoke/CMakeLists.txt | 5 +-
+ src/hufotunnel/CMakeLists.txt | 5 +-
+ src/hyperspace/CMakeLists.txt | 5 +-
+ src/lattice/CMakeLists.txt | 5 +-
+ src/lorenz/CMakeLists.txt | 5 +-
+ src/matrixview/CMakeLists.txt | 5 +-
+ src/microcosm/CMakeLists.txt | 5 +-
+ src/plasma/CMakeLists.txt | 5 +-
+ src/skyrocket/CMakeLists.txt | 5 +-
+ src/solarwinds/CMakeLists.txt | 5 +-
+ src/spirographx/CMakeLists.txt | 5 +-
+ src/sundancer2/CMakeLists.txt | 5 +-
+ 61 files changed, 10268 insertions(+), 433 deletions(-)
+ delete mode 100644 FindLTDL.cmake
+ delete mode 100644 debian/changelog
+ delete mode 100644 depends/common/imagemagick/CMakeLists.txt
+ delete mode 100644 depends/common/imagemagick/deps.txt
+ delete mode 100644 depends/common/imagemagick/flags.txt
+ delete mode 100644 depends/common/imagemagick/imagemagick.sha256
+ delete mode 100644 depends/common/imagemagick/imagemagick.txt
+ delete mode 100644 depends/common/jpeg-9b/CMakeLists.txt
+ delete mode 100644 depends/common/jpeg-9b/jpeg-9b.sha256
+ delete mode 100644 depends/common/jpeg-9b/jpeg-9b.txt
+ delete mode 100644 depends/common/libtool/CMakeLists.txt
+ delete mode 100644 depends/common/libtool/libtool.sha256
+ delete mode 100644 depends/common/libtool/libtool.txt
+ delete mode 100644 depends/common/png/deps.txt
+ delete mode 100644 depends/common/png/flags.txt
+ delete mode 100644 depends/common/png/png.sha256
+ delete mode 100644 depends/common/png/png.txt
+ delete mode 100644 depends/common/tiff/CMakeLists.txt
+ delete mode 100644 depends/common/tiff/tiff.sha256
+ delete mode 100644 depends/common/tiff/tiff.txt
+ delete mode 100644 depends/common/zlib/01-build-static.patch
+ delete mode 100644 depends/common/zlib/zlib.sha256
+ delete mode 100644 depends/common/zlib/zlib.txt
+ delete mode 100644 lib/ImageMagick/CMakeLists.txt
+ create mode 100644 src/drempels/stb_image.h
+ create mode 100644 src/drempels/stb_image_resize.h
+
+diff --git a/.gitignore b/.gitignore
+index 1f8f2fd..07408fa 100644
+--- a/.gitignore
++++ b/.gitignore
+@@ -36,5 +36,3 @@ obj-x86_64-linux-gnu/
+
+ # clion
+ .idea/
+-
+-*.patch
+diff --git a/.travis.yml b/.travis.yml
+index 61219bd..09070da 100644
+--- a/.travis.yml
++++ b/.travis.yml
+@@ -1,4 +1,4 @@
+-+language: cpp
++language: cpp
+
+ #
+ # Define the build matrix
+@@ -24,15 +24,7 @@ matrix:
+ - os: osx
+ osx_image: xcode9
+
+-#
+-# Some of the OS X images don't have cmake, contrary to what people
+-# on the Internet say
+-#
+ before_install:
+- - if [[ "$TRAVIS_OS_NAME" == "osx" ]]; then which cmake || brew update ; fi
+- - if [[ "$TRAVIS_OS_NAME" == "osx" ]]; then which cmake || brew install cmake ; fi
+- - if [[ "$TRAVIS_OS_NAME" == "osx" ]]; then brew update && brew upgrade cmake libpng libtiff || true; fi
+- - if [[ "$TRAVIS_OS_NAME" == "osx" ]]; then brew install libtool openjpeg xz ; fi # depends for ImageMagick 7
+ - if [[ "$TRAVIS_OS_NAME" == "linux" ]]; then sudo apt-get install -y libgl1-mesa-dev; fi
+
+ #
+diff --git a/CMakeLists.txt b/CMakeLists.txt
+index a86ccd0..feeff64 100644
+--- a/CMakeLists.txt
++++ b/CMakeLists.txt
+@@ -3,23 +3,11 @@ project(screensavers.rsxs)
+
+ set(CMAKE_MODULE_PATH ${CMAKE_MODULE_PATH} ${PROJECT_SOURCE_DIR})
+
+-enable_language(CXX)
+-
+ cmake_policy(SET CMP0054 NEW)
+
+-option(OWN_IMAGE_MAGICK "Build own reduced ImageMagick" OFF)
+-
+ find_package(Kodi REQUIRED)
+-find_package(ImageMagick COMPONENTS MagickCore)
+-find_package(ImageMagick COMPONENTS MagickWand)
+ find_package(glm REQUIRED)
+ find_package(gli REQUIRED)
+-find_package(JPEG REQUIRED)
+-find_package(TIFF REQUIRED)
+-find_package(PNG REQUIRED)
+-find_package(LTDL)
+-
+-# set(APP_RENDER_SYSTEM "gles") # Leaved here for test purpose only
+
+ if(APP_RENDER_SYSTEM STREQUAL "gl" OR NOT APP_RENDER_SYSTEM)
+ find_package(OpenGl REQUIRED)
+@@ -37,18 +25,12 @@ include_directories(${KODI_INCLUDE_DIR}/.. # Hack way with "/..", need bigger Ko
+ ${GLM_INCLUDE_DIR}
+ ${GLI_INCLUDE_DIR})
+
+-if(ImageMagick_FOUND AND NOT ${OWN_IMAGE_MAGICK})
+- message(STATUS "ImageMagick found in the system and is used")
+-else()
+- message(STATUS "ImageMagick not found or forced and add custom created")
+- add_subdirectory(lib/ImageMagick)
+-endif()
+ add_subdirectory(lib/kodi/gui/gl)
+ add_subdirectory(lib/Implicit)
+ add_subdirectory(lib/Rgbhsl)
+ add_subdirectory(lib/rsMath)
+
+-list(APPEND DEPENDS glm gli rsMath kodiOpenGL ImageMagick)
++list(APPEND DEPENDS glm gli rsMath kodiOpenGL)
+ list(APPEND DEPLIBS rsMath kodiOpenGL Implicit Rgbhsl)
+
+ if(NOT ${CORE_SYSTEM_NAME} STREQUAL "")
+@@ -63,7 +45,6 @@ if(CMAKE_BUILD_TYPE)
+ message(STATUS "Build type: ${CMAKE_BUILD_TYPE}")
+ endif()
+
+-
+ set(DUMMY_SOURCES ${PROJECT_SOURCE_DIR}/src/dummy.cpp)
+
+ include(src/biof/CMakeLists.txt)
+@@ -91,4 +72,3 @@ include(src/spirographx/CMakeLists.txt)
+ include(src/sundancer2/CMakeLists.txt)
+
+ include(CPack)
+-
+diff --git a/FindLTDL.cmake b/FindLTDL.cmake
+deleted file mode 100644
+index 2afc42c..0000000
+--- a/FindLTDL.cmake
++++ /dev/null
+@@ -1,18 +0,0 @@
+-find_path(LTDL_INCLUDE_DIR ltdl.h)
+-if (NOT WIN32)
+- find_library(LTDL_LIBRARY NAMES libtldl ltdl)
+-endif()
+-
+-include(FindPackageHandleStandardArgs)
+-if (NOT WIN32)
+- find_package_handle_standard_args(LTDL DEFAULT_MSG
+- LTDL_LIBRARY LTDL_INCLUDE_DIR)
+-else()
+- find_package_handle_standard_args(LTDL DEFAULT_MSG
+- LTDL_INCLUDE_DIR)
+-endif()
+-
+-mark_as_advanced(LTDL_INCLUDE_DIR LTDL_LIBRARY)
+-
+-set(LTDL_INCLUDE_DIRS ${LTDL_INCLUDE_DIR})
+-set(LTDL_LIBRARIES ${LTDL_LIBRARY})
+diff --git a/Jenkinsfile b/Jenkinsfile
+index a229fa5..43a94b4 100644
+--- a/Jenkinsfile
++++ b/Jenkinsfile
+@@ -1 +1 @@
+-buildPlugin(version: "Leia")
++buildPlugin(platforms: ['android-armv7', 'android-aarch64', 'ios-armv7', 'ios-aarch64', 'osx-x86_64', 'ubuntu-ppa'])
+diff --git a/debian/changelog b/debian/changelog
+deleted file mode 100644
+index c299464..0000000
+--- a/debian/changelog
++++ /dev/null
+@@ -1,7 +0,0 @@
+-kodi-screensavers-rsxs (3.0.0-0~cosmic) cosmic; urgency=low
+-
+- [ xbmc ]
+- * autogenerated dummy changelog
+-
+- -- Arne Morten Kvarving <arne.morten.kvarving at sintef.no> Sat, 01 Jun 2013 00:59:22 +0200
+-
+diff --git a/debian/compat b/debian/compat
+index b4de394..45a4fb7 100644
+--- a/debian/compat
++++ b/debian/compat
+@@ -1 +1 @@
+-11
++8
+diff --git a/debian/control b/debian/control
+index a1a94b0..cfac7f8 100644
+--- a/debian/control
++++ b/debian/control
+@@ -5,10 +5,7 @@ Build-Depends: debhelper (>= 9.0.0), cmake, kodi-addon-dev,
+ libgl1-mesa-dev, libltdl-dev,
+ libglm-dev, opengl-image-dev,
+ automake, autoconf, libtool,
+- libbz2-dev, zlib1g-dev,
+- libpng-dev, libjpeg-dev, libtiff-dev,
+- libmagickcore-dev, libmagickwand-dev,
+- libmagickwand-6-headers
++ libbz2-dev
+ Standards-Version: 4.1.2
+ Section: libs
+ Homepage: http://kodi.org
+diff --git a/depends/common/bz2/CMakeLists.txt b/depends/common/bz2/CMakeLists.txt
+index 4d8755c..6b1a0a5 100644
+--- a/depends/common/bz2/CMakeLists.txt
++++ b/depends/common/bz2/CMakeLists.txt
+@@ -1,7 +1,6 @@
++cmake_minimum_required(VERSION 3.5)
+ project(bzip2)
+
+-cmake_minimum_required(VERSION 2.8)
+-
+ if(NOT WIN32)
+ set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -D_FILE_OFFSET_BITS=64")
+ elseif(CMAKE_SYSTEM_NAME STREQUAL WindowsStore)
+diff --git a/depends/common/glm/glm.sha256 b/depends/common/glm/glm.sha256
+index a2281e4..7339f4f 100644
+--- a/depends/common/glm/glm.sha256
++++ b/depends/common/glm/glm.sha256
+@@ -1 +1 @@
+-7f093f11c49877716bab96813c2e834db6839095281c8c0c65c60c8bdb9504a3
++fba9fd177073a36c5a7798c74b28e79ba6deb8f4bb0d2dbfc0e207c27da7e12c
+diff --git a/depends/common/glm/glm.txt b/depends/common/glm/glm.txt
+index eeb544e..090db8c 100644
+--- a/depends/common/glm/glm.txt
++++ b/depends/common/glm/glm.txt
+@@ -1 +1 @@
+-glm https://github.com/g-truc/glm/archive/47031aa4b7b079716e4cac496819e7f464b6a713.tar.gz
++glm https://github.com/g-truc/glm/archive/0.9.9.3.tar.gz
+diff --git a/depends/common/imagemagick/CMakeLists.txt b/depends/common/imagemagick/CMakeLists.txt
+deleted file mode 100644
+index fa924de..0000000
+--- a/depends/common/imagemagick/CMakeLists.txt
++++ /dev/null
+@@ -1,51 +0,0 @@
+-project(ImageMagick)
+-
+-cmake_minimum_required(VERSION 3.3)
+-
+-find_package(JPEG REQUIRED)
+-find_package(TIFF REQUIRED)
+-find_package(PNG REQUIRED)
+-find_package(LTDL)
+-
+-include_directories(${LTDL_INCLUDE_DIRS} ${JPEG_INCLUDE_DIRS} ${PNG_INCLUDE_DIR} ${TIFF_INCLUDE_DIR})
+-
+-message(STATUS "--------------------------_> ${CMAKE_MODULE_PATH}")
+-# Force on travis where only Ubuntu 16.04 Xenial is available the use of gcc
+-# on Image Magick, otherwise brings it configure errors!
+-if(DEFINED ENV{TRAVIS_COMPILER})
+- if($ENV{TRAVIS_COMPILER} STREQUAL "clang")
+- set(OVERRIDE_COMPILER CC=gcc CXX=g++)
+- endif()
+-endif()
+-
+-include(ExternalProject)
+-ExternalProject_Add(ImageMagick
+- SOURCE_DIR ${CMAKE_SOURCE_DIR}
+- UPDATE_COMMAND ""
+- CONFIGURE_COMMAND ${OVERRIDE_COMPILER} <SOURCE_DIR>/configure
+- --prefix=${OUTPUT_DIR}
+- --enable-static
+- --disable-shared
+- --disable-opencl
+- --with-pic
+- --without-x
+- --without-magick-plus-plus
+- --without-openexr
+- --without-openjp2
+- --without-pango
+- --without-fftw
+- --without-fontconfig
+- --without-freetype
+- --without-djvu
+- --without-lcms
+- --without-jbig
+- --without-lqr
+- --without-bzlib
+- --without-lzma
+- --without-webp
+- --without-xml
+- --without-gvc
+- INSTALL_COMMAND ""
+- BUILD_IN_SOURCE 1)
+-
+-install(CODE "execute_process(COMMAND make install WORKING_DIRECTORY ${CMAKE_SOURCE_DIR})")
+diff --git a/depends/common/imagemagick/deps.txt b/depends/common/imagemagick/deps.txt
+deleted file mode 100644
+index 2c6f62f..0000000
+--- a/depends/common/imagemagick/deps.txt
++++ /dev/null
+@@ -1,4 +0,0 @@
+-jpeg-9b
+-tiff
+-png
+-libtool
+diff --git a/depends/common/imagemagick/flags.txt b/depends/common/imagemagick/flags.txt
+deleted file mode 100644
+index 60891cb..0000000
+--- a/depends/common/imagemagick/flags.txt
++++ /dev/null
+@@ -1 +0,0 @@
+--DCMAKE_POSITION_INDEPENDENT_CODE=1
+diff --git a/depends/common/imagemagick/imagemagick.sha256 b/depends/common/imagemagick/imagemagick.sha256
+deleted file mode 100644
+index de260ef..0000000
+--- a/depends/common/imagemagick/imagemagick.sha256
++++ /dev/null
+@@ -1 +0,0 @@
+-9ef618f8f55182ae60dbef15242a18c1ece528dac4b8ac4732a41b7f2f4302b0
+diff --git a/depends/common/imagemagick/imagemagick.txt b/depends/common/imagemagick/imagemagick.txt
+deleted file mode 100644
+index 9a8b4e6..0000000
+--- a/depends/common/imagemagick/imagemagick.txt
++++ /dev/null
+@@ -1 +0,0 @@
+-imagemagick https://github.com/ImageMagick/ImageMagick6/archive/6.9.10-25.tar.gz
+diff --git a/depends/common/jpeg-9b/CMakeLists.txt b/depends/common/jpeg-9b/CMakeLists.txt
+deleted file mode 100644
+index 80072ff..0000000
+--- a/depends/common/jpeg-9b/CMakeLists.txt
++++ /dev/null
+@@ -1,14 +0,0 @@
+-cmake_minimum_required(VERSION 3.3)
+-
+-project(jpeg-9b)
+-
+-include(ExternalProject)
+-
+-externalproject_add(jpeg-9b
+- SOURCE_DIR ${CMAKE_SOURCE_DIR}
+- UPDATE_COMMAND autoreconf -vif
+- CONFIGURE_COMMAND CC=${CMAKE_C_COMPILER} AR=${CMAKE_AR} ${CMAKE_SOURCE_DIR}/configure --prefix=${OUTPUT_DIR} --disable-shared --with-pic
+- INSTALL_COMMAND ""
+- BUILD_IN_SOURCE 1)
+-
+-install(CODE "execute_process(COMMAND make install WORKING_DIRECTORY ${CMAKE_SOURCE_DIR})")
+diff --git a/depends/common/jpeg-9b/jpeg-9b.sha256 b/depends/common/jpeg-9b/jpeg-9b.sha256
+deleted file mode 100644
+index fc0b3c5..0000000
+--- a/depends/common/jpeg-9b/jpeg-9b.sha256
++++ /dev/null
+@@ -1 +0,0 @@
+-240fd398da741669bf3c90366f58452ea59041cacc741a489b99f2f6a0bad052
+diff --git a/depends/common/jpeg-9b/jpeg-9b.txt b/depends/common/jpeg-9b/jpeg-9b.txt
+deleted file mode 100644
+index aeb7c1e..0000000
+--- a/depends/common/jpeg-9b/jpeg-9b.txt
++++ /dev/null
+@@ -1 +0,0 @@
+-jpeg-9b http://mirrors.xbmc.org/build-deps/sources/jpegsrc.v9b.tar.gz
+diff --git a/depends/common/libtool/CMakeLists.txt b/depends/common/libtool/CMakeLists.txt
+deleted file mode 100644
+index 3f97cc7..0000000
+--- a/depends/common/libtool/CMakeLists.txt
++++ /dev/null
+@@ -1,14 +0,0 @@
+-cmake_minimum_required(VERSION 3.3)
+-
+-project(libtool)
+-
+-include(ExternalProject)
+-
+-externalproject_add(libtool
+- SOURCE_DIR ${CMAKE_SOURCE_DIR}
+-# UPDATE_COMMAND autoreconf -vif
+- CONFIGURE_COMMAND CC=${CMAKE_C_COMPILER} AR=${CMAKE_AR} ${CMAKE_SOURCE_DIR}/configure --prefix=${OUTPUT_DIR} --disable-shared --with-pic
+- INSTALL_COMMAND ""
+- BUILD_IN_SOURCE 1)
+-
+-install(CODE "execute_process(COMMAND make install WORKING_DIRECTORY ${CMAKE_SOURCE_DIR})")
+diff --git a/depends/common/libtool/libtool.sha256 b/depends/common/libtool/libtool.sha256
+deleted file mode 100644
+index 1f80867..0000000
+--- a/depends/common/libtool/libtool.sha256
++++ /dev/null
+@@ -1 +0,0 @@
+-e3bd4d5d3d025a36c21dd6af7ea818a2afcd4dfc1ea5a17b39d7854bcd0c06e3
+diff --git a/depends/common/libtool/libtool.txt b/depends/common/libtool/libtool.txt
+deleted file mode 100644
+index 9154449..0000000
+--- a/depends/common/libtool/libtool.txt
++++ /dev/null
+@@ -1 +0,0 @@
+-libtool http://mirrors.xbmc.org/build-deps/sources/libtool-2.4.6.tar.gz
+diff --git a/depends/common/png/deps.txt b/depends/common/png/deps.txt
+deleted file mode 100644
+index f22003e..0000000
+--- a/depends/common/png/deps.txt
++++ /dev/null
+@@ -1 +0,0 @@
+-zlib
+diff --git a/depends/common/png/flags.txt b/depends/common/png/flags.txt
+deleted file mode 100644
+index b666a4d..0000000
+--- a/depends/common/png/flags.txt
++++ /dev/null
+@@ -1 +0,0 @@
+--DPNG_SHARED=0
+diff --git a/depends/common/png/png.sha256 b/depends/common/png/png.sha256
+deleted file mode 100644
+index 366f0b5..0000000
+--- a/depends/common/png/png.sha256
++++ /dev/null
+@@ -1 +0,0 @@
+-81bfc8f16ed125622c0c5ad44eeffda19e7a7c7e32f47e43c8932bf32deae7cc
+diff --git a/depends/common/png/png.txt b/depends/common/png/png.txt
+deleted file mode 100644
+index 298e647..0000000
+--- a/depends/common/png/png.txt
++++ /dev/null
+@@ -1 +0,0 @@
+-png http://mirrors.xbmc.org/build-deps/sources/libpng-1.6.26.tar.gz
+diff --git a/depends/common/tiff/CMakeLists.txt b/depends/common/tiff/CMakeLists.txt
+deleted file mode 100644
+index 286e736..0000000
+--- a/depends/common/tiff/CMakeLists.txt
++++ /dev/null
+@@ -1,14 +0,0 @@
+-cmake_minimum_required(VERSION 3.3)
+-
+-project(tiff)
+-
+-include(ExternalProject)
+-
+-externalproject_add(tiff
+- SOURCE_DIR ${CMAKE_SOURCE_DIR}
+- UPDATE_COMMAND autoreconf -vif
+- CONFIGURE_COMMAND CC=${CMAKE_C_COMPILER} AR=${CMAKE_AR} ${CMAKE_SOURCE_DIR}/configure --prefix=${OUTPUT_DIR} --disable-shared --with-pic
+- INSTALL_COMMAND ""
+- BUILD_IN_SOURCE 1)
+-
+-install(CODE "execute_process(COMMAND make install WORKING_DIRECTORY ${CMAKE_SOURCE_DIR})")
+diff --git a/depends/common/tiff/tiff.sha256 b/depends/common/tiff/tiff.sha256
+deleted file mode 100644
+index b6ec457..0000000
+--- a/depends/common/tiff/tiff.sha256
++++ /dev/null
+@@ -1 +0,0 @@
+-f5d64dd4ce61c55f5e9f6dc3920fbe5a41e02c2e607da7117a35eb5c320cef6a
+diff --git a/depends/common/tiff/tiff.txt b/depends/common/tiff/tiff.txt
+deleted file mode 100644
+index 88e4d59..0000000
+--- a/depends/common/tiff/tiff.txt
++++ /dev/null
+@@ -1 +0,0 @@
+-tiff http://mirrors.xbmc.org/build-deps/sources/tiff-3.9.7.tar.gz
+diff --git a/depends/common/zlib/01-build-static.patch b/depends/common/zlib/01-build-static.patch
+deleted file mode 100644
+index 8cc3cfc..0000000
+--- a/depends/common/zlib/01-build-static.patch
++++ /dev/null
+@@ -1,36 +0,0 @@
+---- a/CMakeLists.txt
+-+++ b/CMakeLists.txt
+-@@ -183,10 +183,11 @@
+- set(ZLIB_DLL_SRCS ${CMAKE_CURRENT_BINARY_DIR}/zlib1rc.obj)
+- endif(MINGW)
+-
+--add_library(zlib SHARED ${ZLIB_SRCS} ${ZLIB_ASMS} ${ZLIB_DLL_SRCS} ${ZLIB_PUBLIC_HDRS} ${ZLIB_PRIVATE_HDRS})
+--add_library(zlibstatic STATIC ${ZLIB_SRCS} ${ZLIB_ASMS} ${ZLIB_PUBLIC_HDRS} ${ZLIB_PRIVATE_HDRS})
+--set_target_properties(zlib PROPERTIES DEFINE_SYMBOL ZLIB_DLL)
+--set_target_properties(zlib PROPERTIES SOVERSION 1)
+-+add_library(zlib ${ZLIB_SRCS} ${ZLIB_ASMS} ${ZLIB_DLL_SRCS} ${ZLIB_PUBLIC_HDRS} ${ZLIB_PRIVATE_HDRS})
+-+if(BUILD_SHARED_LIBS)
+-+ set_target_properties(zlib PROPERTIES DEFINE_SYMBOL ZLIB_DLL)
+-+ set_target_properties(zlib PROPERTIES SOVERSION 1)
+-+endif()
+-
+- if(NOT CYGWIN)
+- # This property causes shared libraries on Linux to have the full version
+-@@ -201,7 +202,7 @@
+-
+- if(UNIX)
+- # On unix-like platforms the library is almost always called libz
+-- set_target_properties(zlib zlibstatic PROPERTIES OUTPUT_NAME z)
+-+ set_target_properties(zlib PROPERTIES OUTPUT_NAME z)
+- if(NOT APPLE)
+- set_target_properties(zlib PROPERTIES LINK_FLAGS "-Wl,--version-script,\"${CMAKE_CURRENT_SOURCE_DIR}/zlib.map\"")
+- endif()
+-@@ -211,7 +212,7 @@
+- endif()
+-
+- if(NOT SKIP_INSTALL_LIBRARIES AND NOT SKIP_INSTALL_ALL )
+-- install(TARGETS zlib zlibstatic
+-+ install(TARGETS zlib
+- RUNTIME DESTINATION "${INSTALL_BIN_DIR}"
+- ARCHIVE DESTINATION "${INSTALL_LIB_DIR}"
+- LIBRARY DESTINATION "${INSTALL_LIB_DIR}" )
+diff --git a/depends/common/zlib/zlib.sha256 b/depends/common/zlib/zlib.sha256
+deleted file mode 100644
+index ec1ba07..0000000
+--- a/depends/common/zlib/zlib.sha256
++++ /dev/null
+@@ -1 +0,0 @@
+-c3e5e9fdd5004dcb542feda5ee4f0ff0744628baf8ed2dd5d66f8ca1197cb1a1
+diff --git a/depends/common/zlib/zlib.txt b/depends/common/zlib/zlib.txt
+deleted file mode 100644
+index 4bf3645..0000000
+--- a/depends/common/zlib/zlib.txt
++++ /dev/null
+@@ -1 +0,0 @@
+-zlib http://mirrors.kodi.tv/build-deps/sources/zlib-1.2.11.tar.gz
+diff --git a/depends/osx/glm/glm.sha256 b/depends/osx/glm/glm.sha256
+index a2281e4..7339f4f 100644
+--- a/depends/osx/glm/glm.sha256
++++ b/depends/osx/glm/glm.sha256
+@@ -1 +1 @@
+-7f093f11c49877716bab96813c2e834db6839095281c8c0c65c60c8bdb9504a3
++fba9fd177073a36c5a7798c74b28e79ba6deb8f4bb0d2dbfc0e207c27da7e12c
+diff --git a/depends/osx/glm/glm.txt b/depends/osx/glm/glm.txt
+index eeb544e..090db8c 100644
+--- a/depends/osx/glm/glm.txt
++++ b/depends/osx/glm/glm.txt
+@@ -1 +1 @@
+-glm https://github.com/g-truc/glm/archive/47031aa4b7b079716e4cac496819e7f464b6a713.tar.gz
++glm https://github.com/g-truc/glm/archive/0.9.9.3.tar.gz
+diff --git a/lib/ImageMagick/CMakeLists.txt b/lib/ImageMagick/CMakeLists.txt
+deleted file mode 100644
+index c18de6c..0000000
+--- a/lib/ImageMagick/CMakeLists.txt
++++ /dev/null
+@@ -1,63 +0,0 @@
+-project(ImageMagick)
+-
+-cmake_minimum_required(VERSION 3.3)
+-
+-find_package(JPEG REQUIRED)
+-find_package(TIFF REQUIRED)
+-find_package(PNG REQUIRED)
+-find_package(LTDL)
+-
+-include_directories(${LTDL_INCLUDE_DIRS} ${JPEG_INCLUDE_DIRS} ${PNG_INCLUDE_DIR} ${TIFF_INCLUDE_DIR})
+-
+-# Force on travis where only Ubuntu 16.04 Xenial is available the use of gcc
+-# on Image Magick, otherwise brings it configure errors!
+-if(DEFINED ENV{TRAVIS_COMPILER})
+- if($ENV{TRAVIS_COMPILER} STREQUAL "clang")
+- set(OVERRIDE_COMPILER CC=gcc CXX=g++)
+- endif()
+-endif()
+-
+-file(READ "${CMAKE_SOURCE_DIR}/depends/common/imagemagick/imagemagick.txt" url)
+-separate_arguments(url)
+-list(GET url 1 url)
+-file(READ "${CMAKE_SOURCE_DIR}/depends/common/imagemagick/imagemagick.sha256" sha256)
+-separate_arguments(sha256)
+-string(STRIP ${sha256} sha256)
+-
+-include(ExternalProject)
+-ExternalProject_Add(ImageMagick
+- URL ${url}
+- URL_HASH SHA256=${sha256}
+- UPDATE_COMMAND ""
+- CONFIGURE_COMMAND ${OVERRIDE_COMPILER} <SOURCE_DIR>/configure
+- --prefix=${OUTPUT_DIR}
+- --enable-static
+- --disable-shared
+- --disable-opencl
+- --with-pic
+- --without-x
+- --without-magick-plus-plus
+- --without-openexr
+- --without-openjp2
+- --without-pango
+- --without-fftw
+- --without-fontconfig
+- --without-freetype
+- --without-djvu
+- --without-lcms
+- --without-jbig
+- --without-lqr
+- --without-bzlib
+- --without-lzma
+- --without-webp
+- --without-xml
+- --without-gvc
+- INSTALL_COMMAND ""
+- BUILD_IN_SOURCE 1)
+-
+-ExternalProject_Get_Property(ImageMagick source_dir)
+-
+-set(ImageMagick_INCLUDE_DIRS ${source_dir} CACHE INTERNAL "")
+-set(ImageMagick_LIBRARIES ${source_dir}/magick/.libs/libMagickCore-6.Q16.a
+- ${source_dir}/wand/.libs/libMagickWand-6.Q16.a
+- CACHE INTERNAL "")
+diff --git a/src/biof/CMakeLists.txt b/src/biof/CMakeLists.txt
+index 62bb895..810bec4 100644
+--- a/src/biof/CMakeLists.txt
++++ b/src/biof/CMakeLists.txt
+@@ -1,9 +1,6 @@
++cmake_minimum_required(VERSION 3.5)
+ project(screensaver.rsxs.biof)
+
+-cmake_minimum_required(VERSION 3.0)
+-
+-enable_language(CXX)
+-
+ message(STATUS "--------------------------------------------------------------------------------")
+ message(STATUS "Create \"${CMAKE_PROJECT_NAME}\"")
+
+diff --git a/src/busyspheres/CMakeLists.txt b/src/busyspheres/CMakeLists.txt
+index 1688bb8..41650ca 100644
+--- a/src/busyspheres/CMakeLists.txt
++++ b/src/busyspheres/CMakeLists.txt
+@@ -1,9 +1,6 @@
++cmake_minimum_required(VERSION 3.5)
+ project(screensaver.rsxs.busyspheres)
+
+-cmake_minimum_required(VERSION 3.0)
+-
+-enable_language(CXX)
+-
+ message(STATUS "--------------------------------------------------------------------------------")
+ message(STATUS "Create \"${CMAKE_PROJECT_NAME}\"")
+
+diff --git a/src/colorfire/CMakeLists.txt b/src/colorfire/CMakeLists.txt
+index fa34bdc..ec8cd44 100644
+--- a/src/colorfire/CMakeLists.txt
++++ b/src/colorfire/CMakeLists.txt
+@@ -1,9 +1,6 @@
++cmake_minimum_required(VERSION 3.5)
+ project(screensaver.rsxs.colorfire)
+
+-cmake_minimum_required(VERSION 3.0)
+-
+-enable_language(CXX)
+-
+ message(STATUS "--------------------------------------------------------------------------------")
+ message(STATUS "Create \"${CMAKE_PROJECT_NAME}\"")
+
+diff --git a/src/cyclone/CMakeLists.txt b/src/cyclone/CMakeLists.txt
+index 198998b..8af4172 100644
+--- a/src/cyclone/CMakeLists.txt
++++ b/src/cyclone/CMakeLists.txt
+@@ -1,9 +1,6 @@
++cmake_minimum_required(VERSION 3.5)
+ project(screensaver.rsxs.cyclone)
+
+-cmake_minimum_required(VERSION 3.0)
+-
+-enable_language(CXX)
+-
+ message(STATUS "--------------------------------------------------------------------------------")
+ message(STATUS "Create \"${CMAKE_PROJECT_NAME}\"")
+
+diff --git a/src/drempels/CMakeLists.txt b/src/drempels/CMakeLists.txt
+index 8cdf8e5..1ebd427 100644
+--- a/src/drempels/CMakeLists.txt
++++ b/src/drempels/CMakeLists.txt
+@@ -1,9 +1,6 @@
++cmake_minimum_required(VERSION 3.5)
+ project(screensaver.rsxs.drempels)
+
+-cmake_minimum_required(VERSION 3.3)
+-
+-enable_language(CXX)
+-
+ message(STATUS "--------------------------------------------------------------------------------")
+ message(STATUS "Create \"${CMAKE_PROJECT_NAME}\"")
+
+@@ -19,19 +16,8 @@ set(DREMPELS_SOURCES ${CMAKE_CURRENT_LIST_DIR}/main.cpp
+ set(DREMPELS_HEADERS ${CMAKE_CURRENT_LIST_DIR}/main.h
+ ${CMAKE_CURRENT_LIST_DIR}/gpoly.h
+ ${CMAKE_CURRENT_LIST_DIR}/noise1234.h
++ ${CMAKE_CURRENT_LIST_DIR}/stb_image.h
++ ${CMAKE_CURRENT_LIST_DIR}/stb_image_resize.h
+ ${CMAKE_CURRENT_LIST_DIR}/TexMgr.h)
+
+-set(ADDON_DEPENDS ImageMagick)
+-include_directories(${ImageMagick_INCLUDE_DIRS})
+-set(DREMPELS_DEPLIBS ${DEPLIBS}
+- ${ImageMagick_LIBRARIES}
+- ${JPEG_LIBRARIES}
+- ${PNG_LIBRARIES}
+- ${TIFF_LIBRARIES}
+- ${LTDL_LIBRARIES})
+-
+-build_addon(screensaver.rsxs.drempels DREMPELS DREMPELS_DEPLIBS)
+-if(NOT ImageMagick_FOUND)
+- # Force build of own if ImageMagick is not present
+- add_dependencies(screensaver.rsxs.drempels ImageMagick)
+-endif()
++build_addon(screensaver.rsxs.drempels DREMPELS DEPLIBS)
+diff --git a/src/drempels/TexMgr.cpp b/src/drempels/TexMgr.cpp
+index 62e899c..2160935 100644
+--- a/src/drempels/TexMgr.cpp
++++ b/src/drempels/TexMgr.cpp
+@@ -28,17 +28,19 @@
+ #endif
+ #include <cstdlib>
+
+-#include <magick/api.h>
+-#include <wand/magick-wand.h>
+ #include <dirent.h>
+ #include <sys/types.h>
+ #include <sys/stat.h>
+ #include <time.h>
+ #include <unistd.h>
+ #include <kodi/General.h>
++#include <Rgbhsl/Rgbhsl.h>
+
+ #include "noise1234.h"
+-#include <Rgbhsl/Rgbhsl.h>
++#define STB_IMAGE_IMPLEMENTATION
++#include "stb_image.h"
++#define STB_IMAGE_RESIZE_IMPLEMENTATION
++#include "stb_image_resize.h"
+
+ using namespace std;
+
+@@ -124,8 +126,8 @@ bool TexMgr::getNext()
+ ok = true;
+
+ {
+- unsigned int *tmp = prevTex;
+- unsigned int tmpW = prevW, tmpH = prevH;
++ uint32_t *tmp = prevTex;
++ uint32_t tmpW = prevW, tmpH = prevH;
+
+ prevTex = curTex;
+ prevW = curW; prevH = curH;
+@@ -154,7 +156,7 @@ void TexMgr::genTex()
+ if ((nextTex == nullptr) || (gw > nextW) || (gh > nextH))
+ {
+ delete [] nextTex;
+- nextTex = new unsigned int[gw * gh];
++ nextTex = new uint32_t[gw * gh];
+ nextW = gw;
+ nextH = gh;
+ }
+@@ -202,7 +204,7 @@ void TexMgr::genTex()
+
+ hsl2rgb(h, s, l, r, g, b);
+
+- nextTex[uu++] = 0xff000000 + (unsigned int)(r * 255) + ((unsigned int)(g * 255) << 8) + ((unsigned int)(b * 255) << 16);
++ nextTex[uu++] = 0xff000000 + (uint32_t)(r * 255) + ((uint32_t)(g * 255) << 8) + ((uint32_t)(b * 255) << 16);
+ }
+ }
+
+@@ -236,18 +238,19 @@ static unsigned int computeDesiredSize(const unsigned int input, const int desir
+ // Directory scanning + image loading code in a separate function callable either from loadNextImage or another thread if pthreads is available.
+ void TexMgr::loadNextImageFromDisk()
+ {
+- MagickWand *magick_wand = NewMagickWand();
+- ExceptionInfo exception;
+ int dirLoop = 0;
++ bool imageLoaded = false;
++ int width, height, channels;
++ unsigned char *image = nullptr;
+
+- GetExceptionInfo (&exception);
+-
+- int imageLoaded = 0;
+- do {
++ do
++ {
+ struct dirent *file;
+
+- if (!imageDir) {
+- if (dirLoop) {
++ if (!imageDir)
++ {
++ if (dirLoop)
++ {
+ dirName = "";
+ return;
+ }
+@@ -257,52 +260,58 @@ void TexMgr::loadNextImageFromDisk()
+ }
+
+ file = readdir (imageDir);
+- if (file) {
++ if (file)
++ {
+ struct stat fileStat;
+ string full_path_and_name = dirName + "/" + file->d_name;
+
+- if (!stat(full_path_and_name.c_str(), (struct stat *)&fileStat)) {
+- if (S_ISREG(fileStat.st_mode)) {
+- if (MagickReadImage(magick_wand, full_path_and_name.c_str ()) == MagickFalse) {
+- char *description;
+- ExceptionType severity;
+-
+- description = MagickGetException(magick_wand, &severity);
+- kodi::Log(ADDON_LOG_ERROR, "Error loading %s: %s", full_path_and_name.c_str(), description);
+- description = (char *)MagickRelinquishMemory (description);
+- } else {
+- imageLoaded = 1;
+- }
++ if (!stat(full_path_and_name.c_str(), (struct stat *)&fileStat))
++ {
++ if (S_ISREG(fileStat.st_mode))
++ {
++ image = stbi_load(full_path_and_name.c_str(),
++ &width,
++ &height,
++ &channels,
++ STBI_rgb_alpha);
++
++ if (!image)
++ kodi::Log(ADDON_LOG_ERROR, "Error loading %s: %s", full_path_and_name.c_str(), stbi_failure_reason());
++ else
++ imageLoaded = true;
+ }
+ }
+- } else {
++ }
++ else
++ {
+ closedir(imageDir);
+ imageDir = nullptr;
+ }
+ } while (!imageLoaded);
+
+- const unsigned int iww = MagickGetImageWidth (magick_wand);
+- const unsigned int ihh = MagickGetImageHeight (magick_wand);
+- const unsigned int oww = computeDesiredSize(iww, tw);
+- const unsigned int ohh = computeDesiredSize(ihh, th);
+
+- if ((iww != oww) || (ihh != ohh))
++ if (image)
+ {
+- MagickScaleImage (magick_wand, oww, ohh);
+- }
++ const uint32_t oww = computeDesiredSize(width, tw);
++ const uint32_t ohh = computeDesiredSize(height, th);
++
++ if ((width != oww) || (height != ohh))
++ {
++ stbir_resize_uint8(image, width, height, 0, image, oww, ohh, 0, STBI_rgb_alpha);
++ }
+
+- if ((nextTex == nullptr) || (oww > nextW) || (ohh > nextH))
+- {
+- delete [] nextTex;
+- nextTex = new unsigned int[oww * ohh];
+- nextW = oww;
+- nextH = ohh;
++ if ((nextTex == nullptr) || (oww > nextW) || (ohh > nextH))
++ {
++ delete [] nextTex;
++ nextTex = new uint32_t[oww * ohh];
++ nextW = oww;
++ nextH = ohh;
++ }
++
++ memcpy(nextTex, image, oww * ohh * sizeof(uint32_t));
++ stbi_image_free(image);
+ }
+
+- ExportImagePixels (GetImageFromMagickWand(magick_wand), 0, 0, oww, ohh, "RGBA", CharPixel, nextTex, &exception);
+-
+- magick_wand = DestroyMagickWand (magick_wand);
+-
+ ready = true;
+ }
+
+@@ -331,4 +340,3 @@ void *TexMgr::imageThreadMain(void *vp)
+
+ return nullptr;
+ }
+-
+diff --git a/src/drempels/stb_image.h b/src/drempels/stb_image.h
+new file mode 100644
+index 0000000..a6202a3
+--- /dev/null
++++ b/src/drempels/stb_image.h
+@@ -0,0 +1,7547 @@
++/* stb_image - v2.22 - public domain image loader - http://nothings.org/stb
++ no warranty implied; use at your own risk
++
++ Do this:
++ #define STB_IMAGE_IMPLEMENTATION
++ before you include this file in *one* C or C++ file to create the implementation.
++
++ // i.e. it should look like this:
++ #include ...
++ #include ...
++ #include ...
++ #define STB_IMAGE_IMPLEMENTATION
++ #include "stb_image.h"
++
++ You can #define STBI_ASSERT(x) before the #include to avoid using assert.h.
++ And #define STBI_MALLOC, STBI_REALLOC, and STBI_FREE to avoid using malloc,realloc,free
++
++
++ QUICK NOTES:
++ Primarily of interest to game developers and other people who can
++ avoid problematic images and only need the trivial interface
++
++ JPEG baseline & progressive (12 bpc/arithmetic not supported, same as stock IJG lib)
++ PNG 1/2/4/8/16-bit-per-channel
++
++ TGA (not sure what subset, if a subset)
++ BMP non-1bpp, non-RLE
++ PSD (composited view only, no extra channels, 8/16 bit-per-channel)
++
++ GIF (*comp always reports as 4-channel)
++ HDR (radiance rgbE format)
++ PIC (Softimage PIC)
++ PNM (PPM and PGM binary only)
++
++ Animated GIF still needs a proper API, but here's one way to do it:
++ http://gist.github.com/urraka/685d9a6340b26b830d49
++
++ - decode from memory or through FILE (define STBI_NO_STDIO to remove code)
++ - decode from arbitrary I/O callbacks
++ - SIMD acceleration on x86/x64 (SSE2) and ARM (NEON)
++
++ Full documentation under "DOCUMENTATION" below.
++
++
++LICENSE
++
++ See end of file for license information.
++
++RECENT REVISION HISTORY:
++
++ 2.22 (2019-03-04) gif fixes, fix warnings
++ 2.21 (2019-02-25) fix typo in comment
++ 2.20 (2019-02-07) support utf8 filenames in Windows; fix warnings and platform ifdefs
++ 2.19 (2018-02-11) fix warning
++ 2.18 (2018-01-30) fix warnings
++ 2.17 (2018-01-29) bugfix, 1-bit BMP, 16-bitness query, fix warnings
++ 2.16 (2017-07-23) all functions have 16-bit variants; optimizations; bugfixes
++ 2.15 (2017-03-18) fix png-1,2,4; all Imagenet JPGs; no runtime SSE detection on GCC
++ 2.14 (2017-03-03) remove deprecated STBI_JPEG_OLD; fixes for Imagenet JPGs
++ 2.13 (2016-12-04) experimental 16-bit API, only for PNG so far; fixes
++ 2.12 (2016-04-02) fix typo in 2.11 PSD fix that caused crashes
++ 2.11 (2016-04-02) 16-bit PNGS; enable SSE2 in non-gcc x64
++ RGB-format JPEG; remove white matting in PSD;
++ allocate large structures on the stack;
++ correct channel count for PNG & BMP
++ 2.10 (2016-01-22) avoid warning introduced in 2.09
++ 2.09 (2016-01-16) 16-bit TGA; comments in PNM files; STBI_REALLOC_SIZED
++
++ See end of file for full revision history.
++
++
++ ============================ Contributors =========================
++
++ Image formats Extensions, features
++ Sean Barrett (jpeg, png, bmp) Jetro Lauha (stbi_info)
++ Nicolas Schulz (hdr, psd) Martin "SpartanJ" Golini (stbi_info)
++ Jonathan Dummer (tga) James "moose2000" Brown (iPhone PNG)
++ Jean-Marc Lienher (gif) Ben "Disch" Wenger (io callbacks)
++ Tom Seddon (pic) Omar Cornut (1/2/4-bit PNG)
++ Thatcher Ulrich (psd) Nicolas Guillemot (vertical flip)
++ Ken Miller (pgm, ppm) Richard Mitton (16-bit PSD)
++ github:urraka (animated gif) Junggon Kim (PNM comments)
++ Christopher Forseth (animated gif) Daniel Gibson (16-bit TGA)
++ socks-the-fox (16-bit PNG)
++ Jeremy Sawicki (handle all ImageNet JPGs)
++ Optimizations & bugfixes Mikhail Morozov (1-bit BMP)
++ Fabian "ryg" Giesen Anael Seghezzi (is-16-bit query)
++ Arseny Kapoulkine
++ John-Mark Allen
++ Carmelo J Fdez-Aguera
++
++ Bug & warning fixes
++ Marc LeBlanc David Woo Guillaume George Martins Mozeiko
++ Christpher Lloyd Jerry Jansson Joseph Thomson Phil Jordan
++ Dave Moore Roy Eltham Hayaki Saito Nathan Reed
++ Won Chun Luke Graham Johan Duparc Nick Verigakis
++ the Horde3D community Thomas Ruf Ronny Chevalier github:rlyeh
++ Janez Zemva John Bartholomew Michal Cichon github:romigrou
++ Jonathan Blow Ken Hamada Tero Hanninen github:svdijk
++ Laurent Gomila Cort Stratton Sergio Gonzalez github:snagar
++ Aruelien Pocheville Thibault Reuille Cass Everitt github:Zelex
++ Ryamond Barbiero Paul Du Bois Engin Manap github:grim210
++ Aldo Culquicondor Philipp Wiesemann Dale Weiler github:sammyhw
++ Oriol Ferrer Mesia Josh Tobin Matthew Gregan github:phprus
++ Julian Raschke Gregory Mullen Baldur Karlsson github:poppolopoppo
++ Christian Floisand Kevin Schmidt JR Smith github:darealshinji
++ Blazej Dariusz Roszkowski github:Michaelangel007
++*/
++
++#ifndef STBI_INCLUDE_STB_IMAGE_H
++#define STBI_INCLUDE_STB_IMAGE_H
++
++// DOCUMENTATION
++//
++// Limitations:
++// - no 12-bit-per-channel JPEG
++// - no JPEGs with arithmetic coding
++// - GIF always returns *comp=4
++//
++// Basic usage (see HDR discussion below for HDR usage):
++// int x,y,n;
++// unsigned char *data = stbi_load(filename, &x, &y, &n, 0);
++// // ... process data if not NULL ...
++// // ... x = width, y = height, n = # 8-bit components per pixel ...
++// // ... replace '0' with '1'..'4' to force that many components per pixel
++// // ... but 'n' will always be the number that it would have been if you said 0
++// stbi_image_free(data)
++//
++// Standard parameters:
++// int *x -- outputs image width in pixels
++// int *y -- outputs image height in pixels
++// int *channels_in_file -- outputs # of image components in image file
++// int desired_channels -- if non-zero, # of image components requested in result
++//
++// The return value from an image loader is an 'unsigned char *' which points
++// to the pixel data, or NULL on an allocation failure or if the image is
++// corrupt or invalid. The pixel data consists of *y scanlines of *x pixels,
++// with each pixel consisting of N interleaved 8-bit components; the first
++// pixel pointed to is top-left-most in the image. There is no padding between
++// image scanlines or between pixels, regardless of format. The number of
++// components N is 'desired_channels' if desired_channels is non-zero, or
++// *channels_in_file otherwise. If desired_channels is non-zero,
++// *channels_in_file has the number of components that _would_ have been
++// output otherwise. E.g. if you set desired_channels to 4, you will always
++// get RGBA output, but you can check *channels_in_file to see if it's trivially
++// opaque because e.g. there were only 3 channels in the source image.
++//
++// An output image with N components has the following components interleaved
++// in this order in each pixel:
++//
++// N=#comp components
++// 1 grey
++// 2 grey, alpha
++// 3 red, green, blue
++// 4 red, green, blue, alpha
++//
++// If image loading fails for any reason, the return value will be NULL,
++// and *x, *y, *channels_in_file will be unchanged. The function
++// stbi_failure_reason() can be queried for an extremely brief, end-user
++// unfriendly explanation of why the load failed. Define STBI_NO_FAILURE_STRINGS
++// to avoid compiling these strings at all, and STBI_FAILURE_USERMSG to get slightly
++// more user-friendly ones.
++//
++// Paletted PNG, BMP, GIF, and PIC images are automatically depalettized.
++//
++// ===========================================================================
++//
++// UNICODE:
++//
++// If compiling for Windows and you wish to use Unicode filenames, compile
++// with
++// #define STBI_WINDOWS_UTF8
++// and pass utf8-encoded filenames. Call stbi_convert_wchar_to_utf8 to convert
++// Windows wchar_t filenames to utf8.
++//
++// ===========================================================================
++//
++// Philosophy
++//
++// stb libraries are designed with the following priorities:
++//
++// 1. easy to use
++// 2. easy to maintain
++// 3. good performance
++//
++// Sometimes I let "good performance" creep up in priority over "easy to maintain",
++// and for best performance I may provide less-easy-to-use APIs that give higher
++// performance, in addition to the easy-to-use ones. Nevertheless, it's important
++// to keep in mind that from the standpoint of you, a client of this library,
++// all you care about is #1 and #3, and stb libraries DO NOT emphasize #3 above all.
++//
++// Some secondary priorities arise directly from the first two, some of which
++// provide more explicit reasons why performance can't be emphasized.
++//
++// - Portable ("ease of use")
++// - Small source code footprint ("easy to maintain")
++// - No dependencies ("ease of use")
++//
++// ===========================================================================
++//
++// I/O callbacks
++//
++// I/O callbacks allow you to read from arbitrary sources, like packaged
++// files or some other source. Data read from callbacks are processed
++// through a small internal buffer (currently 128 bytes) to try to reduce
++// overhead.
++//
++// The three functions you must define are "read" (reads some bytes of data),
++// "skip" (skips some bytes of data), "eof" (reports if the stream is at the end).
++//
++// ===========================================================================
++//
++// SIMD support
++//
++// The JPEG decoder will try to automatically use SIMD kernels on x86 when
++// supported by the compiler. For ARM Neon support, you must explicitly
++// request it.
++//
++// (The old do-it-yourself SIMD API is no longer supported in the current
++// code.)
++//
++// On x86, SSE2 will automatically be used when available based on a run-time
++// test; if not, the generic C versions are used as a fall-back. On ARM targets,
++// the typical path is to have separate builds for NEON and non-NEON devices
++// (at least this is true for iOS and Android). Therefore, the NEON support is
++// toggled by a build flag: define STBI_NEON to get NEON loops.
++//
++// If for some reason you do not want to use any of SIMD code, or if
++// you have issues compiling it, you can disable it entirely by
++// defining STBI_NO_SIMD.
++//
++// ===========================================================================
++//
++// HDR image support (disable by defining STBI_NO_HDR)
++//
++// stb_image supports loading HDR images in general, and currently the Radiance
++// .HDR file format specifically. You can still load any file through the existing
++// interface; if you attempt to load an HDR file, it will be automatically remapped
++// to LDR, assuming gamma 2.2 and an arbitrary scale factor defaulting to 1;
++// both of these constants can be reconfigured through this interface:
++//
++// stbi_hdr_to_ldr_gamma(2.2f);
++// stbi_hdr_to_ldr_scale(1.0f);
++//
++// (note, do not use _inverse_ constants; stbi_image will invert them
++// appropriately).
++//
++// Additionally, there is a new, parallel interface for loading files as
++// (linear) floats to preserve the full dynamic range:
++//
++// float *data = stbi_loadf(filename, &x, &y, &n, 0);
++//
++// If you load LDR images through this interface, those images will
++// be promoted to floating point values, run through the inverse of
++// constants corresponding to the above:
++//
++// stbi_ldr_to_hdr_scale(1.0f);
++// stbi_ldr_to_hdr_gamma(2.2f);
++//
++// Finally, given a filename (or an open file or memory block--see header
++// file for details) containing image data, you can query for the "most
++// appropriate" interface to use (that is, whether the image is HDR or
++// not), using:
++//
++// stbi_is_hdr(char *filename);
++//
++// ===========================================================================
++//
++// iPhone PNG support:
++//
++// By default we convert iphone-formatted PNGs back to RGB, even though
++// they are internally encoded differently. You can disable this conversion
++// by calling stbi_convert_iphone_png_to_rgb(0), in which case
++// you will always just get the native iphone "format" through (which
++// is BGR stored in RGB).
++//
++// Call stbi_set_unpremultiply_on_load(1) as well to force a divide per
++// pixel to remove any premultiplied alpha *only* if the image file explicitly
++// says there's premultiplied data (currently only happens in iPhone images,
++// and only if iPhone convert-to-rgb processing is on).
++//
++// ===========================================================================
++//
++// ADDITIONAL CONFIGURATION
++//
++// - You can suppress implementation of any of the decoders to reduce
++// your code footprint by #defining one or more of the following
++// symbols before creating the implementation.
++//
++// STBI_NO_JPEG
++// STBI_NO_PNG
++// STBI_NO_BMP
++// STBI_NO_PSD
++// STBI_NO_TGA
++// STBI_NO_GIF
++// STBI_NO_HDR
++// STBI_NO_PIC
++// STBI_NO_PNM (.ppm and .pgm)
++//
++// - You can request *only* certain decoders and suppress all other ones
++// (this will be more forward-compatible, as addition of new decoders
++// doesn't require you to disable them explicitly):
++//
++// STBI_ONLY_JPEG
++// STBI_ONLY_PNG
++// STBI_ONLY_BMP
++// STBI_ONLY_PSD
++// STBI_ONLY_TGA
++// STBI_ONLY_GIF
++// STBI_ONLY_HDR
++// STBI_ONLY_PIC
++// STBI_ONLY_PNM (.ppm and .pgm)
++//
++// - If you use STBI_NO_PNG (or _ONLY_ without PNG), and you still
++// want the zlib decoder to be available, #define STBI_SUPPORT_ZLIB
++//
++
++
++#ifndef STBI_NO_STDIO
++#include <stdio.h>
++#endif // STBI_NO_STDIO
++
++#define STBI_VERSION 1
++
++enum
++{
++ STBI_default = 0, // only used for desired_channels
++
++ STBI_grey = 1,
++ STBI_grey_alpha = 2,
++ STBI_rgb = 3,
++ STBI_rgb_alpha = 4
++};
++
++#include <stdlib.h>
++typedef unsigned char stbi_uc;
++typedef unsigned short stbi_us;
++
++#ifdef __cplusplus
++extern "C" {
++#endif
++
++#ifndef STBIDEF
++#ifdef STB_IMAGE_STATIC
++#define STBIDEF static
++#else
++#define STBIDEF extern
++#endif
++#endif
++
++//////////////////////////////////////////////////////////////////////////////
++//
++// PRIMARY API - works on images of any type
++//
++
++//
++// load image by filename, open file, or memory buffer
++//
++
++typedef struct
++{
++ int (*read) (void *user,char *data,int size); // fill 'data' with 'size' bytes. return number of bytes actually read
++ void (*skip) (void *user,int n); // skip the next 'n' bytes, or 'unget' the last -n bytes if negative
++ int (*eof) (void *user); // returns nonzero if we are at end of file/data
++} stbi_io_callbacks;
++
++////////////////////////////////////
++//
++// 8-bits-per-channel interface
++//
++
++STBIDEF stbi_uc *stbi_load_from_memory (stbi_uc const *buffer, int len , int *x, int *y, int *channels_in_file, int desired_channels);
++STBIDEF stbi_uc *stbi_load_from_callbacks(stbi_io_callbacks const *clbk , void *user, int *x, int *y, int *channels_in_file, int desired_channels);
++
++#ifndef STBI_NO_STDIO
++STBIDEF stbi_uc *stbi_load (char const *filename, int *x, int *y, int *channels_in_file, int desired_channels);
++STBIDEF stbi_uc *stbi_load_from_file (FILE *f, int *x, int *y, int *channels_in_file, int desired_channels);
++// for stbi_load_from_file, file pointer is left pointing immediately after image
++#endif
++
++#ifndef STBI_NO_GIF
++STBIDEF stbi_uc *stbi_load_gif_from_memory(stbi_uc const *buffer, int len, int **delays, int *x, int *y, int *z, int *comp, int req_comp);
++#endif
++
++#ifdef STBI_WINDOWS_UTF8
++STBIDEF int stbi_convert_wchar_to_utf8(char *buffer, size_t bufferlen, const wchar_t* input);
++#endif
++
++////////////////////////////////////
++//
++// 16-bits-per-channel interface
++//
++
++STBIDEF stbi_us *stbi_load_16_from_memory (stbi_uc const *buffer, int len, int *x, int *y, int *channels_in_file, int desired_channels);
++STBIDEF stbi_us *stbi_load_16_from_callbacks(stbi_io_callbacks const *clbk, void *user, int *x, int *y, int *channels_in_file, int desired_channels);
++
++#ifndef STBI_NO_STDIO
++STBIDEF stbi_us *stbi_load_16 (char const *filename, int *x, int *y, int *channels_in_file, int desired_channels);
++STBIDEF stbi_us *stbi_load_from_file_16(FILE *f, int *x, int *y, int *channels_in_file, int desired_channels);
++#endif
++
++////////////////////////////////////
++//
++// float-per-channel interface
++//
++#ifndef STBI_NO_LINEAR
++ STBIDEF float *stbi_loadf_from_memory (stbi_uc const *buffer, int len, int *x, int *y, int *channels_in_file, int desired_channels);
++ STBIDEF float *stbi_loadf_from_callbacks (stbi_io_callbacks const *clbk, void *user, int *x, int *y, int *channels_in_file, int desired_channels);
++
++ #ifndef STBI_NO_STDIO
++ STBIDEF float *stbi_loadf (char const *filename, int *x, int *y, int *channels_in_file, int desired_channels);
++ STBIDEF float *stbi_loadf_from_file (FILE *f, int *x, int *y, int *channels_in_file, int desired_channels);
++ #endif
++#endif
++
++#ifndef STBI_NO_HDR
++ STBIDEF void stbi_hdr_to_ldr_gamma(float gamma);
++ STBIDEF void stbi_hdr_to_ldr_scale(float scale);
++#endif // STBI_NO_HDR
++
++#ifndef STBI_NO_LINEAR
++ STBIDEF void stbi_ldr_to_hdr_gamma(float gamma);
++ STBIDEF void stbi_ldr_to_hdr_scale(float scale);
++#endif // STBI_NO_LINEAR
++
++// stbi_is_hdr is always defined, but always returns false if STBI_NO_HDR
++STBIDEF int stbi_is_hdr_from_callbacks(stbi_io_callbacks const *clbk, void *user);
++STBIDEF int stbi_is_hdr_from_memory(stbi_uc const *buffer, int len);
++#ifndef STBI_NO_STDIO
++STBIDEF int stbi_is_hdr (char const *filename);
++STBIDEF int stbi_is_hdr_from_file(FILE *f);
++#endif // STBI_NO_STDIO
++
++
++// get a VERY brief reason for failure
++// NOT THREADSAFE
++STBIDEF const char *stbi_failure_reason (void);
++
++// free the loaded image -- this is just free()
++STBIDEF void stbi_image_free (void *retval_from_stbi_load);
++
++// get image dimensions & components without fully decoding
++STBIDEF int stbi_info_from_memory(stbi_uc const *buffer, int len, int *x, int *y, int *comp);
++STBIDEF int stbi_info_from_callbacks(stbi_io_callbacks const *clbk, void *user, int *x, int *y, int *comp);
++STBIDEF int stbi_is_16_bit_from_memory(stbi_uc const *buffer, int len);
++STBIDEF int stbi_is_16_bit_from_callbacks(stbi_io_callbacks const *clbk, void *user);
++
++#ifndef STBI_NO_STDIO
++STBIDEF int stbi_info (char const *filename, int *x, int *y, int *comp);
++STBIDEF int stbi_info_from_file (FILE *f, int *x, int *y, int *comp);
++STBIDEF int stbi_is_16_bit (char const *filename);
++STBIDEF int stbi_is_16_bit_from_file(FILE *f);
++#endif
++
++
++
++// for image formats that explicitly notate that they have premultiplied alpha,
++// we just return the colors as stored in the file. set this flag to force
++// unpremultiplication. results are undefined if the unpremultiply overflow.
++STBIDEF void stbi_set_unpremultiply_on_load(int flag_true_if_should_unpremultiply);
++
++// indicate whether we should process iphone images back to canonical format,
++// or just pass them through "as-is"
++STBIDEF void stbi_convert_iphone_png_to_rgb(int flag_true_if_should_convert);
++
++// flip the image vertically, so the first pixel in the output array is the bottom left
++STBIDEF void stbi_set_flip_vertically_on_load(int flag_true_if_should_flip);
++
++// ZLIB client - used by PNG, available for other purposes
++
++STBIDEF char *stbi_zlib_decode_malloc_guesssize(const char *buffer, int len, int initial_size, int *outlen);
++STBIDEF char *stbi_zlib_decode_malloc_guesssize_headerflag(const char *buffer, int len, int initial_size, int *outlen, int parse_header);
++STBIDEF char *stbi_zlib_decode_malloc(const char *buffer, int len, int *outlen);
++STBIDEF int stbi_zlib_decode_buffer(char *obuffer, int olen, const char *ibuffer, int ilen);
++
++STBIDEF char *stbi_zlib_decode_noheader_malloc(const char *buffer, int len, int *outlen);
++STBIDEF int stbi_zlib_decode_noheader_buffer(char *obuffer, int olen, const char *ibuffer, int ilen);
++
++
++#ifdef __cplusplus
++}
++#endif
++
++//
++//
++//// end header file /////////////////////////////////////////////////////
++#endif // STBI_INCLUDE_STB_IMAGE_H
++
++#ifdef STB_IMAGE_IMPLEMENTATION
++
++#if defined(STBI_ONLY_JPEG) || defined(STBI_ONLY_PNG) || defined(STBI_ONLY_BMP) \
++ || defined(STBI_ONLY_TGA) || defined(STBI_ONLY_GIF) || defined(STBI_ONLY_PSD) \
++ || defined(STBI_ONLY_HDR) || defined(STBI_ONLY_PIC) || defined(STBI_ONLY_PNM) \
++ || defined(STBI_ONLY_ZLIB)
++ #ifndef STBI_ONLY_JPEG
++ #define STBI_NO_JPEG
++ #endif
++ #ifndef STBI_ONLY_PNG
++ #define STBI_NO_PNG
++ #endif
++ #ifndef STBI_ONLY_BMP
++ #define STBI_NO_BMP
++ #endif
++ #ifndef STBI_ONLY_PSD
++ #define STBI_NO_PSD
++ #endif
++ #ifndef STBI_ONLY_TGA
++ #define STBI_NO_TGA
++ #endif
++ #ifndef STBI_ONLY_GIF
++ #define STBI_NO_GIF
++ #endif
++ #ifndef STBI_ONLY_HDR
++ #define STBI_NO_HDR
++ #endif
++ #ifndef STBI_ONLY_PIC
++ #define STBI_NO_PIC
++ #endif
++ #ifndef STBI_ONLY_PNM
++ #define STBI_NO_PNM
++ #endif
++#endif
++
++#if defined(STBI_NO_PNG) && !defined(STBI_SUPPORT_ZLIB) && !defined(STBI_NO_ZLIB)
++#define STBI_NO_ZLIB
++#endif
++
++
++#include <stdarg.h>
++#include <stddef.h> // ptrdiff_t on osx
++#include <stdlib.h>
++#include <string.h>
++#include <limits.h>
++
++#if !defined(STBI_NO_LINEAR) || !defined(STBI_NO_HDR)
++#include <math.h> // ldexp, pow
++#endif
++
++#ifndef STBI_NO_STDIO
++#include <stdio.h>
++#endif
++
++#ifndef STBI_ASSERT
++#include <assert.h>
++#define STBI_ASSERT(x) assert(x)
++#endif
++
++#ifdef __cplusplus
++#define STBI_EXTERN extern "C"
++#else
++#define STBI_EXTERN extern
++#endif
++
++
++#ifndef _MSC_VER
++ #ifdef __cplusplus
++ #define stbi_inline inline
++ #else
++ #define stbi_inline
++ #endif
++#else
++ #define stbi_inline __forceinline
++#endif
++
++
++#ifdef _MSC_VER
++typedef unsigned short stbi__uint16;
++typedef signed short stbi__int16;
++typedef unsigned int stbi__uint32;
++typedef signed int stbi__int32;
++#else
++#include <stdint.h>
++typedef uint16_t stbi__uint16;
++typedef int16_t stbi__int16;
++typedef uint32_t stbi__uint32;
++typedef int32_t stbi__int32;
++#endif
++
++// should produce compiler error if size is wrong
++typedef unsigned char validate_uint32[sizeof(stbi__uint32)==4 ? 1 : -1];
++
++#ifdef _MSC_VER
++#define STBI_NOTUSED(v) (void)(v)
++#else
++#define STBI_NOTUSED(v) (void)sizeof(v)
++#endif
++
++#ifdef _MSC_VER
++#define STBI_HAS_LROTL
++#endif
++
++#ifdef STBI_HAS_LROTL
++ #define stbi_lrot(x,y) _lrotl(x,y)
++#else
++ #define stbi_lrot(x,y) (((x) << (y)) | ((x) >> (32 - (y))))
++#endif
++
++#if defined(STBI_MALLOC) && defined(STBI_FREE) && (defined(STBI_REALLOC) || defined(STBI_REALLOC_SIZED))
++// ok
++#elif !defined(STBI_MALLOC) && !defined(STBI_FREE) && !defined(STBI_REALLOC) && !defined(STBI_REALLOC_SIZED)
++// ok
++#else
++#error "Must define all or none of STBI_MALLOC, STBI_FREE, and STBI_REALLOC (or STBI_REALLOC_SIZED)."
++#endif
++
++#ifndef STBI_MALLOC
++#define STBI_MALLOC(sz) malloc(sz)
++#define STBI_REALLOC(p,newsz) realloc(p,newsz)
++#define STBI_FREE(p) free(p)
++#endif
++
++#ifndef STBI_REALLOC_SIZED
++#define STBI_REALLOC_SIZED(p,oldsz,newsz) STBI_REALLOC(p,newsz)
++#endif
++
++// x86/x64 detection
++#if defined(__x86_64__) || defined(_M_X64)
++#define STBI__X64_TARGET
++#elif defined(__i386) || defined(_M_IX86)
++#define STBI__X86_TARGET
++#endif
++
++#if defined(__GNUC__) && defined(STBI__X86_TARGET) && !defined(__SSE2__) && !defined(STBI_NO_SIMD)
++// gcc doesn't support sse2 intrinsics unless you compile with -msse2,
++// which in turn means it gets to use SSE2 everywhere. This is unfortunate,
++// but previous attempts to provide the SSE2 functions with runtime
++// detection caused numerous issues. The way architecture extensions are
++// exposed in GCC/Clang is, sadly, not really suited for one-file libs.
++// New behavior: if compiled with -msse2, we use SSE2 without any
++// detection; if not, we don't use it at all.
++#define STBI_NO_SIMD
++#endif
++
++#if defined(__MINGW32__) && defined(STBI__X86_TARGET) && !defined(STBI_MINGW_ENABLE_SSE2) && !defined(STBI_NO_SIMD)
++// Note that __MINGW32__ doesn't actually mean 32-bit, so we have to avoid STBI__X64_TARGET
++//
++// 32-bit MinGW wants ESP to be 16-byte aligned, but this is not in the
++// Windows ABI and VC++ as well as Windows DLLs don't maintain that invariant.
++// As a result, enabling SSE2 on 32-bit MinGW is dangerous when not
++// simultaneously enabling "-mstackrealign".
++//
++// See https://github.com/nothings/stb/issues/81 for more information.
++//
++// So default to no SSE2 on 32-bit MinGW. If you've read this far and added
++// -mstackrealign to your build settings, feel free to #define STBI_MINGW_ENABLE_SSE2.
++#define STBI_NO_SIMD
++#endif
++
++#if !defined(STBI_NO_SIMD) && (defined(STBI__X86_TARGET) || defined(STBI__X64_TARGET))
++#define STBI_SSE2
++#include <emmintrin.h>
++
++#ifdef _MSC_VER
++
++#if _MSC_VER >= 1400 // not VC6
++#include <intrin.h> // __cpuid
++static int stbi__cpuid3(void)
++{
++ int info[4];
++ __cpuid(info,1);
++ return info[3];
++}
++#else
++static int stbi__cpuid3(void)
++{
++ int res;
++ __asm {
++ mov eax,1
++ cpuid
++ mov res,edx
++ }
++ return res;
++}
++#endif
++
++#define STBI_SIMD_ALIGN(type, name) __declspec(align(16)) type name
++
++#if !defined(STBI_NO_JPEG) && defined(STBI_SSE2)
++static int stbi__sse2_available(void)
++{
++ int info3 = stbi__cpuid3();
++ return ((info3 >> 26) & 1) != 0;
++}
++#endif
++
++#else // assume GCC-style if not VC++
++#define STBI_SIMD_ALIGN(type, name) type name __attribute__((aligned(16)))
++
++#if !defined(STBI_NO_JPEG) && defined(STBI_SSE2)
++static int stbi__sse2_available(void)
++{
++ // If we're even attempting to compile this on GCC/Clang, that means
++ // -msse2 is on, which means the compiler is allowed to use SSE2
++ // instructions at will, and so are we.
++ return 1;
++}
++#endif
++
++#endif
++#endif
++
++// ARM NEON
++#if defined(STBI_NO_SIMD) && defined(STBI_NEON)
++#undef STBI_NEON
++#endif
++
++#ifdef STBI_NEON
++#include <arm_neon.h>
++// assume GCC or Clang on ARM targets
++#define STBI_SIMD_ALIGN(type, name) type name __attribute__((aligned(16)))
++#endif
++
++#ifndef STBI_SIMD_ALIGN
++#define STBI_SIMD_ALIGN(type, name) type name
++#endif
++
++///////////////////////////////////////////////
++//
++// stbi__context struct and start_xxx functions
++
++// stbi__context structure is our basic context used by all images, so it
++// contains all the IO context, plus some basic image information
++typedef struct
++{
++ stbi__uint32 img_x, img_y;
++ int img_n, img_out_n;
++
++ stbi_io_callbacks io;
++ void *io_user_data;
++
++ int read_from_callbacks;
++ int buflen;
++ stbi_uc buffer_start[128];
++
++ stbi_uc *img_buffer, *img_buffer_end;
++ stbi_uc *img_buffer_original, *img_buffer_original_end;
++} stbi__context;
++
++
++static void stbi__refill_buffer(stbi__context *s);
++
++// initialize a memory-decode context
++static void stbi__start_mem(stbi__context *s, stbi_uc const *buffer, int len)
++{
++ s->io.read = NULL;
++ s->read_from_callbacks = 0;
++ s->img_buffer = s->img_buffer_original = (stbi_uc *) buffer;
++ s->img_buffer_end = s->img_buffer_original_end = (stbi_uc *) buffer+len;
++}
++
++// initialize a callback-based context
++static void stbi__start_callbacks(stbi__context *s, stbi_io_callbacks *c, void *user)
++{
++ s->io = *c;
++ s->io_user_data = user;
++ s->buflen = sizeof(s->buffer_start);
++ s->read_from_callbacks = 1;
++ s->img_buffer_original = s->buffer_start;
++ stbi__refill_buffer(s);
++ s->img_buffer_original_end = s->img_buffer_end;
++}
++
++#ifndef STBI_NO_STDIO
++
++static int stbi__stdio_read(void *user, char *data, int size)
++{
++ return (int) fread(data,1,size,(FILE*) user);
++}
++
++static void stbi__stdio_skip(void *user, int n)
++{
++ fseek((FILE*) user, n, SEEK_CUR);
++}
++
++static int stbi__stdio_eof(void *user)
++{
++ return feof((FILE*) user);
++}
++
++static stbi_io_callbacks stbi__stdio_callbacks =
++{
++ stbi__stdio_read,
++ stbi__stdio_skip,
++ stbi__stdio_eof,
++};
++
++static void stbi__start_file(stbi__context *s, FILE *f)
++{
++ stbi__start_callbacks(s, &stbi__stdio_callbacks, (void *) f);
++}
++
++//static void stop_file(stbi__context *s) { }
++
++#endif // !STBI_NO_STDIO
++
++static void stbi__rewind(stbi__context *s)
++{
++ // conceptually rewind SHOULD rewind to the beginning of the stream,
++ // but we just rewind to the beginning of the initial buffer, because
++ // we only use it after doing 'test', which only ever looks at at most 92 bytes
++ s->img_buffer = s->img_buffer_original;
++ s->img_buffer_end = s->img_buffer_original_end;
++}
++
++enum
++{
++ STBI_ORDER_RGB,
++ STBI_ORDER_BGR
++};
++
++typedef struct
++{
++ int bits_per_channel;
++ int num_channels;
++ int channel_order;
++} stbi__result_info;
++
++#ifndef STBI_NO_JPEG
++static int stbi__jpeg_test(stbi__context *s);
++static void *stbi__jpeg_load(stbi__context *s, int *x, int *y, int *comp, int req_comp, stbi__result_info *ri);
++static int stbi__jpeg_info(stbi__context *s, int *x, int *y, int *comp);
++#endif
++
++#ifndef STBI_NO_PNG
++static int stbi__png_test(stbi__context *s);
++static void *stbi__png_load(stbi__context *s, int *x, int *y, int *comp, int req_comp, stbi__result_info *ri);
++static int stbi__png_info(stbi__context *s, int *x, int *y, int *comp);
++static int stbi__png_is16(stbi__context *s);
++#endif
++
++#ifndef STBI_NO_BMP
++static int stbi__bmp_test(stbi__context *s);
++static void *stbi__bmp_load(stbi__context *s, int *x, int *y, int *comp, int req_comp, stbi__result_info *ri);
++static int stbi__bmp_info(stbi__context *s, int *x, int *y, int *comp);
++#endif
++
++#ifndef STBI_NO_TGA
++static int stbi__tga_test(stbi__context *s);
++static void *stbi__tga_load(stbi__context *s, int *x, int *y, int *comp, int req_comp, stbi__result_info *ri);
++static int stbi__tga_info(stbi__context *s, int *x, int *y, int *comp);
++#endif
++
++#ifndef STBI_NO_PSD
++static int stbi__psd_test(stbi__context *s);
++static void *stbi__psd_load(stbi__context *s, int *x, int *y, int *comp, int req_comp, stbi__result_info *ri, int bpc);
++static int stbi__psd_info(stbi__context *s, int *x, int *y, int *comp);
++static int stbi__psd_is16(stbi__context *s);
++#endif
++
++#ifndef STBI_NO_HDR
++static int stbi__hdr_test(stbi__context *s);
++static float *stbi__hdr_load(stbi__context *s, int *x, int *y, int *comp, int req_comp, stbi__result_info *ri);
++static int stbi__hdr_info(stbi__context *s, int *x, int *y, int *comp);
++#endif
++
++#ifndef STBI_NO_PIC
++static int stbi__pic_test(stbi__context *s);
++static void *stbi__pic_load(stbi__context *s, int *x, int *y, int *comp, int req_comp, stbi__result_info *ri);
++static int stbi__pic_info(stbi__context *s, int *x, int *y, int *comp);
++#endif
++
++#ifndef STBI_NO_GIF
++static int stbi__gif_test(stbi__context *s);
++static void *stbi__gif_load(stbi__context *s, int *x, int *y, int *comp, int req_comp, stbi__result_info *ri);
++static void *stbi__load_gif_main(stbi__context *s, int **delays, int *x, int *y, int *z, int *comp, int req_comp);
++static int stbi__gif_info(stbi__context *s, int *x, int *y, int *comp);
++#endif
++
++#ifndef STBI_NO_PNM
++static int stbi__pnm_test(stbi__context *s);
++static void *stbi__pnm_load(stbi__context *s, int *x, int *y, int *comp, int req_comp, stbi__result_info *ri);
++static int stbi__pnm_info(stbi__context *s, int *x, int *y, int *comp);
++#endif
++
++// this is not threadsafe
++static const char *stbi__g_failure_reason;
++
++STBIDEF const char *stbi_failure_reason(void)
++{
++ return stbi__g_failure_reason;
++}
++
++static int stbi__err(const char *str)
++{
++ stbi__g_failure_reason = str;
++ return 0;
++}
++
++static void *stbi__malloc(size_t size)
++{
++ return STBI_MALLOC(size);
++}
++
++// stb_image uses ints pervasively, including for offset calculations.
++// therefore the largest decoded image size we can support with the
++// current code, even on 64-bit targets, is INT_MAX. this is not a
++// significant limitation for the intended use case.
++//
++// we do, however, need to make sure our size calculations don't
++// overflow. hence a few helper functions for size calculations that
++// multiply integers together, making sure that they're non-negative
++// and no overflow occurs.
++
++// return 1 if the sum is valid, 0 on overflow.
++// negative terms are considered invalid.
++static int stbi__addsizes_valid(int a, int b)
++{
++ if (b < 0) return 0;
++ // now 0 <= b <= INT_MAX, hence also
++ // 0 <= INT_MAX - b <= INTMAX.
++ // And "a + b <= INT_MAX" (which might overflow) is the
++ // same as a <= INT_MAX - b (no overflow)
++ return a <= INT_MAX - b;
++}
++
++// returns 1 if the product is valid, 0 on overflow.
++// negative factors are considered invalid.
++static int stbi__mul2sizes_valid(int a, int b)
++{
++ if (a < 0 || b < 0) return 0;
++ if (b == 0) return 1; // mul-by-0 is always safe
++ // portable way to check for no overflows in a*b
++ return a <= INT_MAX/b;
++}
++
++// returns 1 if "a*b + add" has no negative terms/factors and doesn't overflow
++static int stbi__mad2sizes_valid(int a, int b, int add)
++{
++ return stbi__mul2sizes_valid(a, b) && stbi__addsizes_valid(a*b, add);
++}
++
++// returns 1 if "a*b*c + add" has no negative terms/factors and doesn't overflow
++static int stbi__mad3sizes_valid(int a, int b, int c, int add)
++{
++ return stbi__mul2sizes_valid(a, b) && stbi__mul2sizes_valid(a*b, c) &&
++ stbi__addsizes_valid(a*b*c, add);
++}
++
++// returns 1 if "a*b*c*d + add" has no negative terms/factors and doesn't overflow
++#if !defined(STBI_NO_LINEAR) || !defined(STBI_NO_HDR)
++static int stbi__mad4sizes_valid(int a, int b, int c, int d, int add)
++{
++ return stbi__mul2sizes_valid(a, b) && stbi__mul2sizes_valid(a*b, c) &&
++ stbi__mul2sizes_valid(a*b*c, d) && stbi__addsizes_valid(a*b*c*d, add);
++}
++#endif
++
++// mallocs with size overflow checking
++static void *stbi__malloc_mad2(int a, int b, int add)
++{
++ if (!stbi__mad2sizes_valid(a, b, add)) return NULL;
++ return stbi__malloc(a*b + add);
++}
++
++static void *stbi__malloc_mad3(int a, int b, int c, int add)
++{
++ if (!stbi__mad3sizes_valid(a, b, c, add)) return NULL;
++ return stbi__malloc(a*b*c + add);
++}
++
++#if !defined(STBI_NO_LINEAR) || !defined(STBI_NO_HDR)
++static void *stbi__malloc_mad4(int a, int b, int c, int d, int add)
++{
++ if (!stbi__mad4sizes_valid(a, b, c, d, add)) return NULL;
++ return stbi__malloc(a*b*c*d + add);
++}
++#endif
++
++// stbi__err - error
++// stbi__errpf - error returning pointer to float
++// stbi__errpuc - error returning pointer to unsigned char
++
++#ifdef STBI_NO_FAILURE_STRINGS
++ #define stbi__err(x,y) 0
++#elif defined(STBI_FAILURE_USERMSG)
++ #define stbi__err(x,y) stbi__err(y)
++#else
++ #define stbi__err(x,y) stbi__err(x)
++#endif
++
++#define stbi__errpf(x,y) ((float *)(size_t) (stbi__err(x,y)?NULL:NULL))
++#define stbi__errpuc(x,y) ((unsigned char *)(size_t) (stbi__err(x,y)?NULL:NULL))
++
++STBIDEF void stbi_image_free(void *retval_from_stbi_load)
++{
++ STBI_FREE(retval_from_stbi_load);
++}
++
++#ifndef STBI_NO_LINEAR
++static float *stbi__ldr_to_hdr(stbi_uc *data, int x, int y, int comp);
++#endif
++
++#ifndef STBI_NO_HDR
++static stbi_uc *stbi__hdr_to_ldr(float *data, int x, int y, int comp);
++#endif
++
++static int stbi__vertically_flip_on_load = 0;
++
++STBIDEF void stbi_set_flip_vertically_on_load(int flag_true_if_should_flip)
++{
++ stbi__vertically_flip_on_load = flag_true_if_should_flip;
++}
++
++static void *stbi__load_main(stbi__context *s, int *x, int *y, int *comp, int req_comp, stbi__result_info *ri, int bpc)
++{
++ memset(ri, 0, sizeof(*ri)); // make sure it's initialized if we add new fields
++ ri->bits_per_channel = 8; // default is 8 so most paths don't have to be changed
++ ri->channel_order = STBI_ORDER_RGB; // all current input & output are this, but this is here so we can add BGR order
++ ri->num_channels = 0;
++
++ #ifndef STBI_NO_JPEG
++ if (stbi__jpeg_test(s)) return stbi__jpeg_load(s,x,y,comp,req_comp, ri);
++ #endif
++ #ifndef STBI_NO_PNG
++ if (stbi__png_test(s)) return stbi__png_load(s,x,y,comp,req_comp, ri);
++ #endif
++ #ifndef STBI_NO_BMP
++ if (stbi__bmp_test(s)) return stbi__bmp_load(s,x,y,comp,req_comp, ri);
++ #endif
++ #ifndef STBI_NO_GIF
++ if (stbi__gif_test(s)) return stbi__gif_load(s,x,y,comp,req_comp, ri);
++ #endif
++ #ifndef STBI_NO_PSD
++ if (stbi__psd_test(s)) return stbi__psd_load(s,x,y,comp,req_comp, ri, bpc);
++ #endif
++ #ifndef STBI_NO_PIC
++ if (stbi__pic_test(s)) return stbi__pic_load(s,x,y,comp,req_comp, ri);
++ #endif
++ #ifndef STBI_NO_PNM
++ if (stbi__pnm_test(s)) return stbi__pnm_load(s,x,y,comp,req_comp, ri);
++ #endif
++
++ #ifndef STBI_NO_HDR
++ if (stbi__hdr_test(s)) {
++ float *hdr = stbi__hdr_load(s, x,y,comp,req_comp, ri);
++ return stbi__hdr_to_ldr(hdr, *x, *y, req_comp ? req_comp : *comp);
++ }
++ #endif
++
++ #ifndef STBI_NO_TGA
++ // test tga last because it's a crappy test!
++ if (stbi__tga_test(s))
++ return stbi__tga_load(s,x,y,comp,req_comp, ri);
++ #endif
++
++ return stbi__errpuc("unknown image type", "Image not of any known type, or corrupt");
++}
++
++static stbi_uc *stbi__convert_16_to_8(stbi__uint16 *orig, int w, int h, int channels)
++{
++ int i;
++ int img_len = w * h * channels;
++ stbi_uc *reduced;
++
++ reduced = (stbi_uc *) stbi__malloc(img_len);
++ if (reduced == NULL) return stbi__errpuc("outofmem", "Out of memory");
++
++ for (i = 0; i < img_len; ++i)
++ reduced[i] = (stbi_uc)((orig[i] >> 8) & 0xFF); // top half of each byte is sufficient approx of 16->8 bit scaling
++
++ STBI_FREE(orig);
++ return reduced;
++}
++
++static stbi__uint16 *stbi__convert_8_to_16(stbi_uc *orig, int w, int h, int channels)
++{
++ int i;
++ int img_len = w * h * channels;
++ stbi__uint16 *enlarged;
++
++ enlarged = (stbi__uint16 *) stbi__malloc(img_len*2);
++ if (enlarged == NULL) return (stbi__uint16 *) stbi__errpuc("outofmem", "Out of memory");
++
++ for (i = 0; i < img_len; ++i)
++ enlarged[i] = (stbi__uint16)((orig[i] << 8) + orig[i]); // replicate to high and low byte, maps 0->0, 255->0xffff
++
++ STBI_FREE(orig);
++ return enlarged;
++}
++
++static void stbi__vertical_flip(void *image, int w, int h, int bytes_per_pixel)
++{
++ int row;
++ size_t bytes_per_row = (size_t)w * bytes_per_pixel;
++ stbi_uc temp[2048];
++ stbi_uc *bytes = (stbi_uc *)image;
++
++ for (row = 0; row < (h>>1); row++) {
++ stbi_uc *row0 = bytes + row*bytes_per_row;
++ stbi_uc *row1 = bytes + (h - row - 1)*bytes_per_row;
++ // swap row0 with row1
++ size_t bytes_left = bytes_per_row;
++ while (bytes_left) {
++ size_t bytes_copy = (bytes_left < sizeof(temp)) ? bytes_left : sizeof(temp);
++ memcpy(temp, row0, bytes_copy);
++ memcpy(row0, row1, bytes_copy);
++ memcpy(row1, temp, bytes_copy);
++ row0 += bytes_copy;
++ row1 += bytes_copy;
++ bytes_left -= bytes_copy;
++ }
++ }
++}
++
++#ifndef STBI_NO_GIF
++static void stbi__vertical_flip_slices(void *image, int w, int h, int z, int bytes_per_pixel)
++{
++ int slice;
++ int slice_size = w * h * bytes_per_pixel;
++
++ stbi_uc *bytes = (stbi_uc *)image;
++ for (slice = 0; slice < z; ++slice) {
++ stbi__vertical_flip(bytes, w, h, bytes_per_pixel);
++ bytes += slice_size;
++ }
++}
++#endif
++
++static unsigned char *stbi__load_and_postprocess_8bit(stbi__context *s, int *x, int *y, int *comp, int req_comp)
++{
++ stbi__result_info ri;
++ void *result = stbi__load_main(s, x, y, comp, req_comp, &ri, 8);
++
++ if (result == NULL)
++ return NULL;
++
++ if (ri.bits_per_channel != 8) {
++ STBI_ASSERT(ri.bits_per_channel == 16);
++ result = stbi__convert_16_to_8((stbi__uint16 *) result, *x, *y, req_comp == 0 ? *comp : req_comp);
++ ri.bits_per_channel = 8;
++ }
++
++ // @TODO: move stbi__convert_format to here
++
++ if (stbi__vertically_flip_on_load) {
++ int channels = req_comp ? req_comp : *comp;
++ stbi__vertical_flip(result, *x, *y, channels * sizeof(stbi_uc));
++ }
++
++ return (unsigned char *) result;
++}
++
++static stbi__uint16 *stbi__load_and_postprocess_16bit(stbi__context *s, int *x, int *y, int *comp, int req_comp)
++{
++ stbi__result_info ri;
++ void *result = stbi__load_main(s, x, y, comp, req_comp, &ri, 16);
++
++ if (result == NULL)
++ return NULL;
++
++ if (ri.bits_per_channel != 16) {
++ STBI_ASSERT(ri.bits_per_channel == 8);
++ result = stbi__convert_8_to_16((stbi_uc *) result, *x, *y, req_comp == 0 ? *comp : req_comp);
++ ri.bits_per_channel = 16;
++ }
++
++ // @TODO: move stbi__convert_format16 to here
++ // @TODO: special case RGB-to-Y (and RGBA-to-YA) for 8-bit-to-16-bit case to keep more precision
++
++ if (stbi__vertically_flip_on_load) {
++ int channels = req_comp ? req_comp : *comp;
++ stbi__vertical_flip(result, *x, *y, channels * sizeof(stbi__uint16));
++ }
++
++ return (stbi__uint16 *) result;
++}
++
++#if !defined(STBI_NO_HDR) && !defined(STBI_NO_LINEAR)
++static void stbi__float_postprocess(float *result, int *x, int *y, int *comp, int req_comp)
++{
++ if (stbi__vertically_flip_on_load && result != NULL) {
++ int channels = req_comp ? req_comp : *comp;
++ stbi__vertical_flip(result, *x, *y, channels * sizeof(float));
++ }
++}
++#endif
++
++#ifndef STBI_NO_STDIO
++
++#if defined(_MSC_VER) && defined(STBI_WINDOWS_UTF8)
++STBI_EXTERN __declspec(dllimport) int __stdcall MultiByteToWideChar(unsigned int cp, unsigned long flags, const char *str, int cbmb, wchar_t *widestr, int cchwide);
++STBI_EXTERN __declspec(dllimport) int __stdcall WideCharToMultiByte(unsigned int cp, unsigned long flags, const wchar_t *widestr, int cchwide, char *str, int cbmb, const char *defchar, int *used_default);
++#endif
++
++#if defined(_MSC_VER) && defined(STBI_WINDOWS_UTF8)
++STBIDEF int stbi_convert_wchar_to_utf8(char *buffer, size_t bufferlen, const wchar_t* input)
++{
++ return WideCharToMultiByte(65001 /* UTF8 */, 0, input, -1, buffer, (int) bufferlen, NULL, NULL);
++}
++#endif
++
++static FILE *stbi__fopen(char const *filename, char const *mode)
++{
++ FILE *f;
++#if defined(_MSC_VER) && defined(STBI_WINDOWS_UTF8)
++ wchar_t wMode[64];
++ wchar_t wFilename[1024];
++ if (0 == MultiByteToWideChar(65001 /* UTF8 */, 0, filename, -1, wFilename, sizeof(wFilename)))
++ return 0;
++
++ if (0 == MultiByteToWideChar(65001 /* UTF8 */, 0, mode, -1, wMode, sizeof(wMode)))
++ return 0;
++
++#if _MSC_VER >= 1400
++ if (0 != _wfopen_s(&f, wFilename, wMode))
++ f = 0;
++#else
++ f = _wfopen(wFilename, wMode);
++#endif
++
++#elif defined(_MSC_VER) && _MSC_VER >= 1400
++ if (0 != fopen_s(&f, filename, mode))
++ f=0;
++#else
++ f = fopen(filename, mode);
++#endif
++ return f;
++}
++
++
++STBIDEF stbi_uc *stbi_load(char const *filename, int *x, int *y, int *comp, int req_comp)
++{
++ FILE *f = stbi__fopen(filename, "rb");
++ unsigned char *result;
++ if (!f) return stbi__errpuc("can't fopen", "Unable to open file");
++ result = stbi_load_from_file(f,x,y,comp,req_comp);
++ fclose(f);
++ return result;
++}
++
++STBIDEF stbi_uc *stbi_load_from_file(FILE *f, int *x, int *y, int *comp, int req_comp)
++{
++ unsigned char *result;
++ stbi__context s;
++ stbi__start_file(&s,f);
++ result = stbi__load_and_postprocess_8bit(&s,x,y,comp,req_comp);
++ if (result) {
++ // need to 'unget' all the characters in the IO buffer
++ fseek(f, - (int) (s.img_buffer_end - s.img_buffer), SEEK_CUR);
++ }
++ return result;
++}
++
++STBIDEF stbi__uint16 *stbi_load_from_file_16(FILE *f, int *x, int *y, int *comp, int req_comp)
++{
++ stbi__uint16 *result;
++ stbi__context s;
++ stbi__start_file(&s,f);
++ result = stbi__load_and_postprocess_16bit(&s,x,y,comp,req_comp);
++ if (result) {
++ // need to 'unget' all the characters in the IO buffer
++ fseek(f, - (int) (s.img_buffer_end - s.img_buffer), SEEK_CUR);
++ }
++ return result;
++}
++
++STBIDEF stbi_us *stbi_load_16(char const *filename, int *x, int *y, int *comp, int req_comp)
++{
++ FILE *f = stbi__fopen(filename, "rb");
++ stbi__uint16 *result;
++ if (!f) return (stbi_us *) stbi__errpuc("can't fopen", "Unable to open file");
++ result = stbi_load_from_file_16(f,x,y,comp,req_comp);
++ fclose(f);
++ return result;
++}
++
++
++#endif //!STBI_NO_STDIO
++
++STBIDEF stbi_us *stbi_load_16_from_memory(stbi_uc const *buffer, int len, int *x, int *y, int *channels_in_file, int desired_channels)
++{
++ stbi__context s;
++ stbi__start_mem(&s,buffer,len);
++ return stbi__load_and_postprocess_16bit(&s,x,y,channels_in_file,desired_channels);
++}
++
++STBIDEF stbi_us *stbi_load_16_from_callbacks(stbi_io_callbacks const *clbk, void *user, int *x, int *y, int *channels_in_file, int desired_channels)
++{
++ stbi__context s;
++ stbi__start_callbacks(&s, (stbi_io_callbacks *)clbk, user);
++ return stbi__load_and_postprocess_16bit(&s,x,y,channels_in_file,desired_channels);
++}
++
++STBIDEF stbi_uc *stbi_load_from_memory(stbi_uc const *buffer, int len, int *x, int *y, int *comp, int req_comp)
++{
++ stbi__context s;
++ stbi__start_mem(&s,buffer,len);
++ return stbi__load_and_postprocess_8bit(&s,x,y,comp,req_comp);
++}
++
++STBIDEF stbi_uc *stbi_load_from_callbacks(stbi_io_callbacks const *clbk, void *user, int *x, int *y, int *comp, int req_comp)
++{
++ stbi__context s;
++ stbi__start_callbacks(&s, (stbi_io_callbacks *) clbk, user);
++ return stbi__load_and_postprocess_8bit(&s,x,y,comp,req_comp);
++}
++
++#ifndef STBI_NO_GIF
++STBIDEF stbi_uc *stbi_load_gif_from_memory(stbi_uc const *buffer, int len, int **delays, int *x, int *y, int *z, int *comp, int req_comp)
++{
++ unsigned char *result;
++ stbi__context s;
++ stbi__start_mem(&s,buffer,len);
++
++ result = (unsigned char*) stbi__load_gif_main(&s, delays, x, y, z, comp, req_comp);
++ if (stbi__vertically_flip_on_load) {
++ stbi__vertical_flip_slices( result, *x, *y, *z, *comp );
++ }
++
++ return result;
++}
++#endif
++
++#ifndef STBI_NO_LINEAR
++static float *stbi__loadf_main(stbi__context *s, int *x, int *y, int *comp, int req_comp)
++{
++ unsigned char *data;
++ #ifndef STBI_NO_HDR
++ if (stbi__hdr_test(s)) {
++ stbi__result_info ri;
++ float *hdr_data = stbi__hdr_load(s,x,y,comp,req_comp, &ri);
++ if (hdr_data)
++ stbi__float_postprocess(hdr_data,x,y,comp,req_comp);
++ return hdr_data;
++ }
++ #endif
++ data = stbi__load_and_postprocess_8bit(s, x, y, comp, req_comp);
++ if (data)
++ return stbi__ldr_to_hdr(data, *x, *y, req_comp ? req_comp : *comp);
++ return stbi__errpf("unknown image type", "Image not of any known type, or corrupt");
++}
++
++STBIDEF float *stbi_loadf_from_memory(stbi_uc const *buffer, int len, int *x, int *y, int *comp, int req_comp)
++{
++ stbi__context s;
++ stbi__start_mem(&s,buffer,len);
++ return stbi__loadf_main(&s,x,y,comp,req_comp);
++}
++
++STBIDEF float *stbi_loadf_from_callbacks(stbi_io_callbacks const *clbk, void *user, int *x, int *y, int *comp, int req_comp)
++{
++ stbi__context s;
++ stbi__start_callbacks(&s, (stbi_io_callbacks *) clbk, user);
++ return stbi__loadf_main(&s,x,y,comp,req_comp);
++}
++
++#ifndef STBI_NO_STDIO
++STBIDEF float *stbi_loadf(char const *filename, int *x, int *y, int *comp, int req_comp)
++{
++ float *result;
++ FILE *f = stbi__fopen(filename, "rb");
++ if (!f) return stbi__errpf("can't fopen", "Unable to open file");
++ result = stbi_loadf_from_file(f,x,y,comp,req_comp);
++ fclose(f);
++ return result;
++}
++
++STBIDEF float *stbi_loadf_from_file(FILE *f, int *x, int *y, int *comp, int req_comp)
++{
++ stbi__context s;
++ stbi__start_file(&s,f);
++ return stbi__loadf_main(&s,x,y,comp,req_comp);
++}
++#endif // !STBI_NO_STDIO
++
++#endif // !STBI_NO_LINEAR
++
++// these is-hdr-or-not is defined independent of whether STBI_NO_LINEAR is
++// defined, for API simplicity; if STBI_NO_LINEAR is defined, it always
++// reports false!
++
++STBIDEF int stbi_is_hdr_from_memory(stbi_uc const *buffer, int len)
++{
++ #ifndef STBI_NO_HDR
++ stbi__context s;
++ stbi__start_mem(&s,buffer,len);
++ return stbi__hdr_test(&s);
++ #else
++ STBI_NOTUSED(buffer);
++ STBI_NOTUSED(len);
++ return 0;
++ #endif
++}
++
++#ifndef STBI_NO_STDIO
++STBIDEF int stbi_is_hdr (char const *filename)
++{
++ FILE *f = stbi__fopen(filename, "rb");
++ int result=0;
++ if (f) {
++ result = stbi_is_hdr_from_file(f);
++ fclose(f);
++ }
++ return result;
++}
++
++STBIDEF int stbi_is_hdr_from_file(FILE *f)
++{
++ #ifndef STBI_NO_HDR
++ long pos = ftell(f);
++ int res;
++ stbi__context s;
++ stbi__start_file(&s,f);
++ res = stbi__hdr_test(&s);
++ fseek(f, pos, SEEK_SET);
++ return res;
++ #else
++ STBI_NOTUSED(f);
++ return 0;
++ #endif
++}
++#endif // !STBI_NO_STDIO
++
++STBIDEF int stbi_is_hdr_from_callbacks(stbi_io_callbacks const *clbk, void *user)
++{
++ #ifndef STBI_NO_HDR
++ stbi__context s;
++ stbi__start_callbacks(&s, (stbi_io_callbacks *) clbk, user);
++ return stbi__hdr_test(&s);
++ #else
++ STBI_NOTUSED(clbk);
++ STBI_NOTUSED(user);
++ return 0;
++ #endif
++}
++
++#ifndef STBI_NO_LINEAR
++static float stbi__l2h_gamma=2.2f, stbi__l2h_scale=1.0f;
++
++STBIDEF void stbi_ldr_to_hdr_gamma(float gamma) { stbi__l2h_gamma = gamma; }
++STBIDEF void stbi_ldr_to_hdr_scale(float scale) { stbi__l2h_scale = scale; }
++#endif
++
++static float stbi__h2l_gamma_i=1.0f/2.2f, stbi__h2l_scale_i=1.0f;
++
++STBIDEF void stbi_hdr_to_ldr_gamma(float gamma) { stbi__h2l_gamma_i = 1/gamma; }
++STBIDEF void stbi_hdr_to_ldr_scale(float scale) { stbi__h2l_scale_i = 1/scale; }
++
++
++//////////////////////////////////////////////////////////////////////////////
++//
++// Common code used by all image loaders
++//
++
++enum
++{
++ STBI__SCAN_load=0,
++ STBI__SCAN_type,
++ STBI__SCAN_header
++};
++
++static void stbi__refill_buffer(stbi__context *s)
++{
++ int n = (s->io.read)(s->io_user_data,(char*)s->buffer_start,s->buflen);
++ if (n == 0) {
++ // at end of file, treat same as if from memory, but need to handle case
++ // where s->img_buffer isn't pointing to safe memory, e.g. 0-byte file
++ s->read_from_callbacks = 0;
++ s->img_buffer = s->buffer_start;
++ s->img_buffer_end = s->buffer_start+1;
++ *s->img_buffer = 0;
++ } else {
++ s->img_buffer = s->buffer_start;
++ s->img_buffer_end = s->buffer_start + n;
++ }
++}
++
++stbi_inline static stbi_uc stbi__get8(stbi__context *s)
++{
++ if (s->img_buffer < s->img_buffer_end)
++ return *s->img_buffer++;
++ if (s->read_from_callbacks) {
++ stbi__refill_buffer(s);
++ return *s->img_buffer++;
++ }
++ return 0;
++}
++
++stbi_inline static int stbi__at_eof(stbi__context *s)
++{
++ if (s->io.read) {
++ if (!(s->io.eof)(s->io_user_data)) return 0;
++ // if feof() is true, check if buffer = end
++ // special case: we've only got the special 0 character at the end
++ if (s->read_from_callbacks == 0) return 1;
++ }
++
++ return s->img_buffer >= s->img_buffer_end;
++}
++
++static void stbi__skip(stbi__context *s, int n)
++{
++ if (n < 0) {
++ s->img_buffer = s->img_buffer_end;
++ return;
++ }
++ if (s->io.read) {
++ int blen = (int) (s->img_buffer_end - s->img_buffer);
++ if (blen < n) {
++ s->img_buffer = s->img_buffer_end;
++ (s->io.skip)(s->io_user_data, n - blen);
++ return;
++ }
++ }
++ s->img_buffer += n;
++}
++
++static int stbi__getn(stbi__context *s, stbi_uc *buffer, int n)
++{
++ if (s->io.read) {
++ int blen = (int) (s->img_buffer_end - s->img_buffer);
++ if (blen < n) {
++ int res, count;
++
++ memcpy(buffer, s->img_buffer, blen);
++
++ count = (s->io.read)(s->io_user_data, (char*) buffer + blen, n - blen);
++ res = (count == (n-blen));
++ s->img_buffer = s->img_buffer_end;
++ return res;
++ }
++ }
++
++ if (s->img_buffer+n <= s->img_buffer_end) {
++ memcpy(buffer, s->img_buffer, n);
++ s->img_buffer += n;
++ return 1;
++ } else
++ return 0;
++}
++
++static int stbi__get16be(stbi__context *s)
++{
++ int z = stbi__get8(s);
++ return (z << 8) + stbi__get8(s);
++}
++
++static stbi__uint32 stbi__get32be(stbi__context *s)
++{
++ stbi__uint32 z = stbi__get16be(s);
++ return (z << 16) + stbi__get16be(s);
++}
++
++#if defined(STBI_NO_BMP) && defined(STBI_NO_TGA) && defined(STBI_NO_GIF)
++// nothing
++#else
++static int stbi__get16le(stbi__context *s)
++{
++ int z = stbi__get8(s);
++ return z + (stbi__get8(s) << 8);
++}
++#endif
++
++#ifndef STBI_NO_BMP
++static stbi__uint32 stbi__get32le(stbi__context *s)
++{
++ stbi__uint32 z = stbi__get16le(s);
++ return z + (stbi__get16le(s) << 16);
++}
++#endif
++
++#define STBI__BYTECAST(x) ((stbi_uc) ((x) & 255)) // truncate int to byte without warnings
++
++
++//////////////////////////////////////////////////////////////////////////////
++//
++// generic converter from built-in img_n to req_comp
++// individual types do this automatically as much as possible (e.g. jpeg
++// does all cases internally since it needs to colorspace convert anyway,
++// and it never has alpha, so very few cases ). png can automatically
++// interleave an alpha=255 channel, but falls back to this for other cases
++//
++// assume data buffer is malloced, so malloc a new one and free that one
++// only failure mode is malloc failing
++
++static stbi_uc stbi__compute_y(int r, int g, int b)
++{
++ return (stbi_uc) (((r*77) + (g*150) + (29*b)) >> 8);
++}
++
++static unsigned char *stbi__convert_format(unsigned char *data, int img_n, int req_comp, unsigned int x, unsigned int y)
++{
++ int i,j;
++ unsigned char *good;
++
++ if (req_comp == img_n) return data;
++ STBI_ASSERT(req_comp >= 1 && req_comp <= 4);
++
++ good = (unsigned char *) stbi__malloc_mad3(req_comp, x, y, 0);
++ if (good == NULL) {
++ STBI_FREE(data);
++ return stbi__errpuc("outofmem", "Out of memory");
++ }
++
++ for (j=0; j < (int) y; ++j) {
++ unsigned char *src = data + j * x * img_n ;
++ unsigned char *dest = good + j * x * req_comp;
++
++ #define STBI__COMBO(a,b) ((a)*8+(b))
++ #define STBI__CASE(a,b) case STBI__COMBO(a,b): for(i=x-1; i >= 0; --i, src += a, dest += b)
++ // convert source image with img_n components to one with req_comp components;
++ // avoid switch per pixel, so use switch per scanline and massive macros
++ switch (STBI__COMBO(img_n, req_comp)) {
++ STBI__CASE(1,2) { dest[0]=src[0]; dest[1]=255; } break;
++ STBI__CASE(1,3) { dest[0]=dest[1]=dest[2]=src[0]; } break;
++ STBI__CASE(1,4) { dest[0]=dest[1]=dest[2]=src[0]; dest[3]=255; } break;
++ STBI__CASE(2,1) { dest[0]=src[0]; } break;
++ STBI__CASE(2,3) { dest[0]=dest[1]=dest[2]=src[0]; } break;
++ STBI__CASE(2,4) { dest[0]=dest[1]=dest[2]=src[0]; dest[3]=src[1]; } break;
++ STBI__CASE(3,4) { dest[0]=src[0];dest[1]=src[1];dest[2]=src[2];dest[3]=255; } break;
++ STBI__CASE(3,1) { dest[0]=stbi__compute_y(src[0],src[1],src[2]); } break;
++ STBI__CASE(3,2) { dest[0]=stbi__compute_y(src[0],src[1],src[2]); dest[1] = 255; } break;
++ STBI__CASE(4,1) { dest[0]=stbi__compute_y(src[0],src[1],src[2]); } break;
++ STBI__CASE(4,2) { dest[0]=stbi__compute_y(src[0],src[1],src[2]); dest[1] = src[3]; } break;
++ STBI__CASE(4,3) { dest[0]=src[0];dest[1]=src[1];dest[2]=src[2]; } break;
++ default: STBI_ASSERT(0);
++ }
++ #undef STBI__CASE
++ }
++
++ STBI_FREE(data);
++ return good;
++}
++
++static stbi__uint16 stbi__compute_y_16(int r, int g, int b)
++{
++ return (stbi__uint16) (((r*77) + (g*150) + (29*b)) >> 8);
++}
++
++static stbi__uint16 *stbi__convert_format16(stbi__uint16 *data, int img_n, int req_comp, unsigned int x, unsigned int y)
++{
++ int i,j;
++ stbi__uint16 *good;
++
++ if (req_comp == img_n) return data;
++ STBI_ASSERT(req_comp >= 1 && req_comp <= 4);
++
++ good = (stbi__uint16 *) stbi__malloc(req_comp * x * y * 2);
++ if (good == NULL) {
++ STBI_FREE(data);
++ return (stbi__uint16 *) stbi__errpuc("outofmem", "Out of memory");
++ }
++
++ for (j=0; j < (int) y; ++j) {
++ stbi__uint16 *src = data + j * x * img_n ;
++ stbi__uint16 *dest = good + j * x * req_comp;
++
++ #define STBI__COMBO(a,b) ((a)*8+(b))
++ #define STBI__CASE(a,b) case STBI__COMBO(a,b): for(i=x-1; i >= 0; --i, src += a, dest += b)
++ // convert source image with img_n components to one with req_comp components;
++ // avoid switch per pixel, so use switch per scanline and massive macros
++ switch (STBI__COMBO(img_n, req_comp)) {
++ STBI__CASE(1,2) { dest[0]=src[0]; dest[1]=0xffff; } break;
++ STBI__CASE(1,3) { dest[0]=dest[1]=dest[2]=src[0]; } break;
++ STBI__CASE(1,4) { dest[0]=dest[1]=dest[2]=src[0]; dest[3]=0xffff; } break;
++ STBI__CASE(2,1) { dest[0]=src[0]; } break;
++ STBI__CASE(2,3) { dest[0]=dest[1]=dest[2]=src[0]; } break;
++ STBI__CASE(2,4) { dest[0]=dest[1]=dest[2]=src[0]; dest[3]=src[1]; } break;
++ STBI__CASE(3,4) { dest[0]=src[0];dest[1]=src[1];dest[2]=src[2];dest[3]=0xffff; } break;
++ STBI__CASE(3,1) { dest[0]=stbi__compute_y_16(src[0],src[1],src[2]); } break;
++ STBI__CASE(3,2) { dest[0]=stbi__compute_y_16(src[0],src[1],src[2]); dest[1] = 0xffff; } break;
++ STBI__CASE(4,1) { dest[0]=stbi__compute_y_16(src[0],src[1],src[2]); } break;
++ STBI__CASE(4,2) { dest[0]=stbi__compute_y_16(src[0],src[1],src[2]); dest[1] = src[3]; } break;
++ STBI__CASE(4,3) { dest[0]=src[0];dest[1]=src[1];dest[2]=src[2]; } break;
++ default: STBI_ASSERT(0);
++ }
++ #undef STBI__CASE
++ }
++
++ STBI_FREE(data);
++ return good;
++}
++
++#ifndef STBI_NO_LINEAR
++static float *stbi__ldr_to_hdr(stbi_uc *data, int x, int y, int comp)
++{
++ int i,k,n;
++ float *output;
++ if (!data) return NULL;
++ output = (float *) stbi__malloc_mad4(x, y, comp, sizeof(float), 0);
++ if (output == NULL) { STBI_FREE(data); return stbi__errpf("outofmem", "Out of memory"); }
++ // compute number of non-alpha components
++ if (comp & 1) n = comp; else n = comp-1;
++ for (i=0; i < x*y; ++i) {
++ for (k=0; k < n; ++k) {
++ output[i*comp + k] = (float) (pow(data[i*comp+k]/255.0f, stbi__l2h_gamma) * stbi__l2h_scale);
++ }
++ }
++ if (n < comp) {
++ for (i=0; i < x*y; ++i) {
++ output[i*comp + n] = data[i*comp + n]/255.0f;
++ }
++ }
++ STBI_FREE(data);
++ return output;
++}
++#endif
++
++#ifndef STBI_NO_HDR
++#define stbi__float2int(x) ((int) (x))
++static stbi_uc *stbi__hdr_to_ldr(float *data, int x, int y, int comp)
++{
++ int i,k,n;
++ stbi_uc *output;
++ if (!data) return NULL;
++ output = (stbi_uc *) stbi__malloc_mad3(x, y, comp, 0);
++ if (output == NULL) { STBI_FREE(data); return stbi__errpuc("outofmem", "Out of memory"); }
++ // compute number of non-alpha components
++ if (comp & 1) n = comp; else n = comp-1;
++ for (i=0; i < x*y; ++i) {
++ for (k=0; k < n; ++k) {
++ float z = (float) pow(data[i*comp+k]*stbi__h2l_scale_i, stbi__h2l_gamma_i) * 255 + 0.5f;
++ if (z < 0) z = 0;
++ if (z > 255) z = 255;
++ output[i*comp + k] = (stbi_uc) stbi__float2int(z);
++ }
++ if (k < comp) {
++ float z = data[i*comp+k] * 255 + 0.5f;
++ if (z < 0) z = 0;
++ if (z > 255) z = 255;
++ output[i*comp + k] = (stbi_uc) stbi__float2int(z);
++ }
++ }
++ STBI_FREE(data);
++ return output;
++}
++#endif
++
++//////////////////////////////////////////////////////////////////////////////
++//
++// "baseline" JPEG/JFIF decoder
++//
++// simple implementation
++// - doesn't support delayed output of y-dimension
++// - simple interface (only one output format: 8-bit interleaved RGB)
++// - doesn't try to recover corrupt jpegs
++// - doesn't allow partial loading, loading multiple at once
++// - still fast on x86 (copying globals into locals doesn't help x86)
++// - allocates lots of intermediate memory (full size of all components)
++// - non-interleaved case requires this anyway
++// - allows good upsampling (see next)
++// high-quality
++// - upsampled channels are bilinearly interpolated, even across blocks
++// - quality integer IDCT derived from IJG's 'slow'
++// performance
++// - fast huffman; reasonable integer IDCT
++// - some SIMD kernels for common paths on targets with SSE2/NEON
++// - uses a lot of intermediate memory, could cache poorly
++
++#ifndef STBI_NO_JPEG
++
++// huffman decoding acceleration
++#define FAST_BITS 9 // larger handles more cases; smaller stomps less cache
++
++typedef struct
++{
++ stbi_uc fast[1 << FAST_BITS];
++ // weirdly, repacking this into AoS is a 10% speed loss, instead of a win
++ stbi__uint16 code[256];
++ stbi_uc values[256];
++ stbi_uc size[257];
++ unsigned int maxcode[18];
++ int delta[17]; // old 'firstsymbol' - old 'firstcode'
++} stbi__huffman;
++
++typedef struct
++{
++ stbi__context *s;
++ stbi__huffman huff_dc[4];
++ stbi__huffman huff_ac[4];
++ stbi__uint16 dequant[4][64];
++ stbi__int16 fast_ac[4][1 << FAST_BITS];
++
++// sizes for components, interleaved MCUs
++ int img_h_max, img_v_max;
++ int img_mcu_x, img_mcu_y;
++ int img_mcu_w, img_mcu_h;
++
++// definition of jpeg image component
++ struct
++ {
++ int id;
++ int h,v;
++ int tq;
++ int hd,ha;
++ int dc_pred;
++
++ int x,y,w2,h2;
++ stbi_uc *data;
++ void *raw_data, *raw_coeff;
++ stbi_uc *linebuf;
++ short *coeff; // progressive only
++ int coeff_w, coeff_h; // number of 8x8 coefficient blocks
++ } img_comp[4];
++
++ stbi__uint32 code_buffer; // jpeg entropy-coded buffer
++ int code_bits; // number of valid bits
++ unsigned char marker; // marker seen while filling entropy buffer
++ int nomore; // flag if we saw a marker so must stop
++
++ int progressive;
++ int spec_start;
++ int spec_end;
++ int succ_high;
++ int succ_low;
++ int eob_run;
++ int jfif;
++ int app14_color_transform; // Adobe APP14 tag
++ int rgb;
++
++ int scan_n, order[4];
++ int restart_interval, todo;
++
++// kernels
++ void (*idct_block_kernel)(stbi_uc *out, int out_stride, short data[64]);
++ void (*YCbCr_to_RGB_kernel)(stbi_uc *out, const stbi_uc *y, const stbi_uc *pcb, const stbi_uc *pcr, int count, int step);
++ stbi_uc *(*resample_row_hv_2_kernel)(stbi_uc *out, stbi_uc *in_near, stbi_uc *in_far, int w, int hs);
++} stbi__jpeg;
++
++static int stbi__build_huffman(stbi__huffman *h, int *count)
++{
++ int i,j,k=0;
++ unsigned int code;
++ // build size list for each symbol (from JPEG spec)
++ for (i=0; i < 16; ++i)
++ for (j=0; j < count[i]; ++j)
++ h->size[k++] = (stbi_uc) (i+1);
++ h->size[k] = 0;
++
++ // compute actual symbols (from jpeg spec)
++ code = 0;
++ k = 0;
++ for(j=1; j <= 16; ++j) {
++ // compute delta to add to code to compute symbol id
++ h->delta[j] = k - code;
++ if (h->size[k] == j) {
++ while (h->size[k] == j)
++ h->code[k++] = (stbi__uint16) (code++);
++ if (code-1 >= (1u << j)) return stbi__err("bad code lengths","Corrupt JPEG");
++ }
++ // compute largest code + 1 for this size, preshifted as needed later
++ h->maxcode[j] = code << (16-j);
++ code <<= 1;
++ }
++ h->maxcode[j] = 0xffffffff;
++
++ // build non-spec acceleration table; 255 is flag for not-accelerated
++ memset(h->fast, 255, 1 << FAST_BITS);
++ for (i=0; i < k; ++i) {
++ int s = h->size[i];
++ if (s <= FAST_BITS) {
++ int c = h->code[i] << (FAST_BITS-s);
++ int m = 1 << (FAST_BITS-s);
++ for (j=0; j < m; ++j) {
++ h->fast[c+j] = (stbi_uc) i;
++ }
++ }
++ }
++ return 1;
++}
++
++// build a table that decodes both magnitude and value of small ACs in
++// one go.
++static void stbi__build_fast_ac(stbi__int16 *fast_ac, stbi__huffman *h)
++{
++ int i;
++ for (i=0; i < (1 << FAST_BITS); ++i) {
++ stbi_uc fast = h->fast[i];
++ fast_ac[i] = 0;
++ if (fast < 255) {
++ int rs = h->values[fast];
++ int run = (rs >> 4) & 15;
++ int magbits = rs & 15;
++ int len = h->size[fast];
++
++ if (magbits && len + magbits <= FAST_BITS) {
++ // magnitude code followed by receive_extend code
++ int k = ((i << len) & ((1 << FAST_BITS) - 1)) >> (FAST_BITS - magbits);
++ int m = 1 << (magbits - 1);
++ if (k < m) k += (~0U << magbits) + 1;
++ // if the result is small enough, we can fit it in fast_ac table
++ if (k >= -128 && k <= 127)
++ fast_ac[i] = (stbi__int16) ((k * 256) + (run * 16) + (len + magbits));
++ }
++ }
++ }
++}
++
++static void stbi__grow_buffer_unsafe(stbi__jpeg *j)
++{
++ do {
++ unsigned int b = j->nomore ? 0 : stbi__get8(j->s);
++ if (b == 0xff) {
++ int c = stbi__get8(j->s);
++ while (c == 0xff) c = stbi__get8(j->s); // consume fill bytes
++ if (c != 0) {
++ j->marker = (unsigned char) c;
++ j->nomore = 1;
++ return;
++ }
++ }
++ j->code_buffer |= b << (24 - j->code_bits);
++ j->code_bits += 8;
++ } while (j->code_bits <= 24);
++}
++
++// (1 << n) - 1
++static const stbi__uint32 stbi__bmask[17]={0,1,3,7,15,31,63,127,255,511,1023,2047,4095,8191,16383,32767,65535};
++
++// decode a jpeg huffman value from the bitstream
++stbi_inline static int stbi__jpeg_huff_decode(stbi__jpeg *j, stbi__huffman *h)
++{
++ unsigned int temp;
++ int c,k;
++
++ if (j->code_bits < 16) stbi__grow_buffer_unsafe(j);
++
++ // look at the top FAST_BITS and determine what symbol ID it is,
++ // if the code is <= FAST_BITS
++ c = (j->code_buffer >> (32 - FAST_BITS)) & ((1 << FAST_BITS)-1);
++ k = h->fast[c];
++ if (k < 255) {
++ int s = h->size[k];
++ if (s > j->code_bits)
++ return -1;
++ j->code_buffer <<= s;
++ j->code_bits -= s;
++ return h->values[k];
++ }
++
++ // naive test is to shift the code_buffer down so k bits are
++ // valid, then test against maxcode. To speed this up, we've
++ // preshifted maxcode left so that it has (16-k) 0s at the
++ // end; in other words, regardless of the number of bits, it
++ // wants to be compared against something shifted to have 16;
++ // that way we don't need to shift inside the loop.
++ temp = j->code_buffer >> 16;
++ for (k=FAST_BITS+1 ; ; ++k)
++ if (temp < h->maxcode[k])
++ break;
++ if (k == 17) {
++ // error! code not found
++ j->code_bits -= 16;
++ return -1;
++ }
++
++ if (k > j->code_bits)
++ return -1;
++
++ // convert the huffman code to the symbol id
++ c = ((j->code_buffer >> (32 - k)) & stbi__bmask[k]) + h->delta[k];
++ STBI_ASSERT((((j->code_buffer) >> (32 - h->size[c])) & stbi__bmask[h->size[c]]) == h->code[c]);
++
++ // convert the id to a symbol
++ j->code_bits -= k;
++ j->code_buffer <<= k;
++ return h->values[c];
++}
++
++// bias[n] = (-1<<n) + 1
++static const int stbi__jbias[16] = {0,-1,-3,-7,-15,-31,-63,-127,-255,-511,-1023,-2047,-4095,-8191,-16383,-32767};
++
++// combined JPEG 'receive' and JPEG 'extend', since baseline
++// always extends everything it receives.
++stbi_inline static int stbi__extend_receive(stbi__jpeg *j, int n)
++{
++ unsigned int k;
++ int sgn;
++ if (j->code_bits < n) stbi__grow_buffer_unsafe(j);
++
++ sgn = (stbi__int32)j->code_buffer >> 31; // sign bit is always in MSB
++ k = stbi_lrot(j->code_buffer, n);
++ STBI_ASSERT(n >= 0 && n < (int) (sizeof(stbi__bmask)/sizeof(*stbi__bmask)));
++ j->code_buffer = k & ~stbi__bmask[n];
++ k &= stbi__bmask[n];
++ j->code_bits -= n;
++ return k + (stbi__jbias[n] & ~sgn);
++}
++
++// get some unsigned bits
++stbi_inline static int stbi__jpeg_get_bits(stbi__jpeg *j, int n)
++{
++ unsigned int k;
++ if (j->code_bits < n) stbi__grow_buffer_unsafe(j);
++ k = stbi_lrot(j->code_buffer, n);
++ j->code_buffer = k & ~stbi__bmask[n];
++ k &= stbi__bmask[n];
++ j->code_bits -= n;
++ return k;
++}
++
++stbi_inline static int stbi__jpeg_get_bit(stbi__jpeg *j)
++{
++ unsigned int k;
++ if (j->code_bits < 1) stbi__grow_buffer_unsafe(j);
++ k = j->code_buffer;
++ j->code_buffer <<= 1;
++ --j->code_bits;
++ return k & 0x80000000;
++}
++
++// given a value that's at position X in the zigzag stream,
++// where does it appear in the 8x8 matrix coded as row-major?
++static const stbi_uc stbi__jpeg_dezigzag[64+15] =
++{
++ 0, 1, 8, 16, 9, 2, 3, 10,
++ 17, 24, 32, 25, 18, 11, 4, 5,
++ 12, 19, 26, 33, 40, 48, 41, 34,
++ 27, 20, 13, 6, 7, 14, 21, 28,
++ 35, 42, 49, 56, 57, 50, 43, 36,
++ 29, 22, 15, 23, 30, 37, 44, 51,
++ 58, 59, 52, 45, 38, 31, 39, 46,
++ 53, 60, 61, 54, 47, 55, 62, 63,
++ // let corrupt input sample past end
++ 63, 63, 63, 63, 63, 63, 63, 63,
++ 63, 63, 63, 63, 63, 63, 63
++};
++
++// decode one 64-entry block--
++static int stbi__jpeg_decode_block(stbi__jpeg *j, short data[64], stbi__huffman *hdc, stbi__huffman *hac, stbi__int16 *fac, int b, stbi__uint16 *dequant)
++{
++ int diff,dc,k;
++ int t;
++
++ if (j->code_bits < 16) stbi__grow_buffer_unsafe(j);
++ t = stbi__jpeg_huff_decode(j, hdc);
++ if (t < 0) return stbi__err("bad huffman code","Corrupt JPEG");
++
++ // 0 all the ac values now so we can do it 32-bits at a time
++ memset(data,0,64*sizeof(data[0]));
++
++ diff = t ? stbi__extend_receive(j, t) : 0;
++ dc = j->img_comp[b].dc_pred + diff;
++ j->img_comp[b].dc_pred = dc;
++ data[0] = (short) (dc * dequant[0]);
++
++ // decode AC components, see JPEG spec
++ k = 1;
++ do {
++ unsigned int zig;
++ int c,r,s;
++ if (j->code_bits < 16) stbi__grow_buffer_unsafe(j);
++ c = (j->code_buffer >> (32 - FAST_BITS)) & ((1 << FAST_BITS)-1);
++ r = fac[c];
++ if (r) { // fast-AC path
++ k += (r >> 4) & 15; // run
++ s = r & 15; // combined length
++ j->code_buffer <<= s;
++ j->code_bits -= s;
++ // decode into unzigzag'd location
++ zig = stbi__jpeg_dezigzag[k++];
++ data[zig] = (short) ((r >> 8) * dequant[zig]);
++ } else {
++ int rs = stbi__jpeg_huff_decode(j, hac);
++ if (rs < 0) return stbi__err("bad huffman code","Corrupt JPEG");
++ s = rs & 15;
++ r = rs >> 4;
++ if (s == 0) {
++ if (rs != 0xf0) break; // end block
++ k += 16;
++ } else {
++ k += r;
++ // decode into unzigzag'd location
++ zig = stbi__jpeg_dezigzag[k++];
++ data[zig] = (short) (stbi__extend_receive(j,s) * dequant[zig]);
++ }
++ }
++ } while (k < 64);
++ return 1;
++}
++
++static int stbi__jpeg_decode_block_prog_dc(stbi__jpeg *j, short data[64], stbi__huffman *hdc, int b)
++{
++ int diff,dc;
++ int t;
++ if (j->spec_end != 0) return stbi__err("can't merge dc and ac", "Corrupt JPEG");
++
++ if (j->code_bits < 16) stbi__grow_buffer_unsafe(j);
++
++ if (j->succ_high == 0) {
++ // first scan for DC coefficient, must be first
++ memset(data,0,64*sizeof(data[0])); // 0 all the ac values now
++ t = stbi__jpeg_huff_decode(j, hdc);
++ diff = t ? stbi__extend_receive(j, t) : 0;
++
++ dc = j->img_comp[b].dc_pred + diff;
++ j->img_comp[b].dc_pred = dc;
++ data[0] = (short) (dc << j->succ_low);
++ } else {
++ // refinement scan for DC coefficient
++ if (stbi__jpeg_get_bit(j))
++ data[0] += (short) (1 << j->succ_low);
++ }
++ return 1;
++}
++
++// @OPTIMIZE: store non-zigzagged during the decode passes,
++// and only de-zigzag when dequantizing
++static int stbi__jpeg_decode_block_prog_ac(stbi__jpeg *j, short data[64], stbi__huffman *hac, stbi__int16 *fac)
++{
++ int k;
++ if (j->spec_start == 0) return stbi__err("can't merge dc and ac", "Corrupt JPEG");
++
++ if (j->succ_high == 0) {
++ int shift = j->succ_low;
++
++ if (j->eob_run) {
++ --j->eob_run;
++ return 1;
++ }
++
++ k = j->spec_start;
++ do {
++ unsigned int zig;
++ int c,r,s;
++ if (j->code_bits < 16) stbi__grow_buffer_unsafe(j);
++ c = (j->code_buffer >> (32 - FAST_BITS)) & ((1 << FAST_BITS)-1);
++ r = fac[c];
++ if (r) { // fast-AC path
++ k += (r >> 4) & 15; // run
++ s = r & 15; // combined length
++ j->code_buffer <<= s;
++ j->code_bits -= s;
++ zig = stbi__jpeg_dezigzag[k++];
++ data[zig] = (short) ((r >> 8) << shift);
++ } else {
++ int rs = stbi__jpeg_huff_decode(j, hac);
++ if (rs < 0) return stbi__err("bad huffman code","Corrupt JPEG");
++ s = rs & 15;
++ r = rs >> 4;
++ if (s == 0) {
++ if (r < 15) {
++ j->eob_run = (1 << r);
++ if (r)
++ j->eob_run += stbi__jpeg_get_bits(j, r);
++ --j->eob_run;
++ break;
++ }
++ k += 16;
++ } else {
++ k += r;
++ zig = stbi__jpeg_dezigzag[k++];
++ data[zig] = (short) (stbi__extend_receive(j,s) << shift);
++ }
++ }
++ } while (k <= j->spec_end);
++ } else {
++ // refinement scan for these AC coefficients
++
++ short bit = (short) (1 << j->succ_low);
++
++ if (j->eob_run) {
++ --j->eob_run;
++ for (k = j->spec_start; k <= j->spec_end; ++k) {
++ short *p = &data[stbi__jpeg_dezigzag[k]];
++ if (*p != 0)
++ if (stbi__jpeg_get_bit(j))
++ if ((*p & bit)==0) {
++ if (*p > 0)
++ *p += bit;
++ else
++ *p -= bit;
++ }
++ }
++ } else {
++ k = j->spec_start;
++ do {
++ int r,s;
++ int rs = stbi__jpeg_huff_decode(j, hac); // @OPTIMIZE see if we can use the fast path here, advance-by-r is so slow, eh
++ if (rs < 0) return stbi__err("bad huffman code","Corrupt JPEG");
++ s = rs & 15;
++ r = rs >> 4;
++ if (s == 0) {
++ if (r < 15) {
++ j->eob_run = (1 << r) - 1;
++ if (r)
++ j->eob_run += stbi__jpeg_get_bits(j, r);
++ r = 64; // force end of block
++ } else {
++ // r=15 s=0 should write 16 0s, so we just do
++ // a run of 15 0s and then write s (which is 0),
++ // so we don't have to do anything special here
++ }
++ } else {
++ if (s != 1) return stbi__err("bad huffman code", "Corrupt JPEG");
++ // sign bit
++ if (stbi__jpeg_get_bit(j))
++ s = bit;
++ else
++ s = -bit;
++ }
++
++ // advance by r
++ while (k <= j->spec_end) {
++ short *p = &data[stbi__jpeg_dezigzag[k++]];
++ if (*p != 0) {
++ if (stbi__jpeg_get_bit(j))
++ if ((*p & bit)==0) {
++ if (*p > 0)
++ *p += bit;
++ else
++ *p -= bit;
++ }
++ } else {
++ if (r == 0) {
++ *p = (short) s;
++ break;
++ }
++ --r;
++ }
++ }
++ } while (k <= j->spec_end);
++ }
++ }
++ return 1;
++}
++
++// take a -128..127 value and stbi__clamp it and convert to 0..255
++stbi_inline static stbi_uc stbi__clamp(int x)
++{
++ // trick to use a single test to catch both cases
++ if ((unsigned int) x > 255) {
++ if (x < 0) return 0;
++ if (x > 255) return 255;
++ }
++ return (stbi_uc) x;
++}
++
++#define stbi__f2f(x) ((int) (((x) * 4096 + 0.5)))
++#define stbi__fsh(x) ((x) * 4096)
++
++// derived from jidctint -- DCT_ISLOW
++#define STBI__IDCT_1D(s0,s1,s2,s3,s4,s5,s6,s7) \
++ int t0,t1,t2,t3,p1,p2,p3,p4,p5,x0,x1,x2,x3; \
++ p2 = s2; \
++ p3 = s6; \
++ p1 = (p2+p3) * stbi__f2f(0.5411961f); \
++ t2 = p1 + p3*stbi__f2f(-1.847759065f); \
++ t3 = p1 + p2*stbi__f2f( 0.765366865f); \
++ p2 = s0; \
++ p3 = s4; \
++ t0 = stbi__fsh(p2+p3); \
++ t1 = stbi__fsh(p2-p3); \
++ x0 = t0+t3; \
++ x3 = t0-t3; \
++ x1 = t1+t2; \
++ x2 = t1-t2; \
++ t0 = s7; \
++ t1 = s5; \
++ t2 = s3; \
++ t3 = s1; \
++ p3 = t0+t2; \
++ p4 = t1+t3; \
++ p1 = t0+t3; \
++ p2 = t1+t2; \
++ p5 = (p3+p4)*stbi__f2f( 1.175875602f); \
++ t0 = t0*stbi__f2f( 0.298631336f); \
++ t1 = t1*stbi__f2f( 2.053119869f); \
++ t2 = t2*stbi__f2f( 3.072711026f); \
++ t3 = t3*stbi__f2f( 1.501321110f); \
++ p1 = p5 + p1*stbi__f2f(-0.899976223f); \
++ p2 = p5 + p2*stbi__f2f(-2.562915447f); \
++ p3 = p3*stbi__f2f(-1.961570560f); \
++ p4 = p4*stbi__f2f(-0.390180644f); \
++ t3 += p1+p4; \
++ t2 += p2+p3; \
++ t1 += p2+p4; \
++ t0 += p1+p3;
++
++static void stbi__idct_block(stbi_uc *out, int out_stride, short data[64])
++{
++ int i,val[64],*v=val;
++ stbi_uc *o;
++ short *d = data;
++
++ // columns
++ for (i=0; i < 8; ++i,++d, ++v) {
++ // if all zeroes, shortcut -- this avoids dequantizing 0s and IDCTing
++ if (d[ 8]==0 && d[16]==0 && d[24]==0 && d[32]==0
++ && d[40]==0 && d[48]==0 && d[56]==0) {
++ // no shortcut 0 seconds
++ // (1|2|3|4|5|6|7)==0 0 seconds
++ // all separate -0.047 seconds
++ // 1 && 2|3 && 4|5 && 6|7: -0.047 seconds
++ int dcterm = d[0]*4;
++ v[0] = v[8] = v[16] = v[24] = v[32] = v[40] = v[48] = v[56] = dcterm;
++ } else {
++ STBI__IDCT_1D(d[ 0],d[ 8],d[16],d[24],d[32],d[40],d[48],d[56])
++ // constants scaled things up by 1<<12; let's bring them back
++ // down, but keep 2 extra bits of precision
++ x0 += 512; x1 += 512; x2 += 512; x3 += 512;
++ v[ 0] = (x0+t3) >> 10;
++ v[56] = (x0-t3) >> 10;
++ v[ 8] = (x1+t2) >> 10;
++ v[48] = (x1-t2) >> 10;
++ v[16] = (x2+t1) >> 10;
++ v[40] = (x2-t1) >> 10;
++ v[24] = (x3+t0) >> 10;
++ v[32] = (x3-t0) >> 10;
++ }
++ }
++
++ for (i=0, v=val, o=out; i < 8; ++i,v+=8,o+=out_stride) {
++ // no fast case since the first 1D IDCT spread components out
++ STBI__IDCT_1D(v[0],v[1],v[2],v[3],v[4],v[5],v[6],v[7])
++ // constants scaled things up by 1<<12, plus we had 1<<2 from first
++ // loop, plus horizontal and vertical each scale by sqrt(8) so together
++ // we've got an extra 1<<3, so 1<<17 total we need to remove.
++ // so we want to round that, which means adding 0.5 * 1<<17,
++ // aka 65536. Also, we'll end up with -128 to 127 that we want
++ // to encode as 0..255 by adding 128, so we'll add that before the shift
++ x0 += 65536 + (128<<17);
++ x1 += 65536 + (128<<17);
++ x2 += 65536 + (128<<17);
++ x3 += 65536 + (128<<17);
++ // tried computing the shifts into temps, or'ing the temps to see
++ // if any were out of range, but that was slower
++ o[0] = stbi__clamp((x0+t3) >> 17);
++ o[7] = stbi__clamp((x0-t3) >> 17);
++ o[1] = stbi__clamp((x1+t2) >> 17);
++ o[6] = stbi__clamp((x1-t2) >> 17);
++ o[2] = stbi__clamp((x2+t1) >> 17);
++ o[5] = stbi__clamp((x2-t1) >> 17);
++ o[3] = stbi__clamp((x3+t0) >> 17);
++ o[4] = stbi__clamp((x3-t0) >> 17);
++ }
++}
++
++#ifdef STBI_SSE2
++// sse2 integer IDCT. not the fastest possible implementation but it
++// produces bit-identical results to the generic C version so it's
++// fully "transparent".
++static void stbi__idct_simd(stbi_uc *out, int out_stride, short data[64])
++{
++ // This is constructed to match our regular (generic) integer IDCT exactly.
++ __m128i row0, row1, row2, row3, row4, row5, row6, row7;
++ __m128i tmp;
++
++ // dot product constant: even elems=x, odd elems=y
++ #define dct_const(x,y) _mm_setr_epi16((x),(y),(x),(y),(x),(y),(x),(y))
++
++ // out(0) = c0[even]*x + c0[odd]*y (c0, x, y 16-bit, out 32-bit)
++ // out(1) = c1[even]*x + c1[odd]*y
++ #define dct_rot(out0,out1, x,y,c0,c1) \
++ __m128i c0##lo = _mm_unpacklo_epi16((x),(y)); \
++ __m128i c0##hi = _mm_unpackhi_epi16((x),(y)); \
++ __m128i out0##_l = _mm_madd_epi16(c0##lo, c0); \
++ __m128i out0##_h = _mm_madd_epi16(c0##hi, c0); \
++ __m128i out1##_l = _mm_madd_epi16(c0##lo, c1); \
++ __m128i out1##_h = _mm_madd_epi16(c0##hi, c1)
++
++ // out = in << 12 (in 16-bit, out 32-bit)
++ #define dct_widen(out, in) \
++ __m128i out##_l = _mm_srai_epi32(_mm_unpacklo_epi16(_mm_setzero_si128(), (in)), 4); \
++ __m128i out##_h = _mm_srai_epi32(_mm_unpackhi_epi16(_mm_setzero_si128(), (in)), 4)
++
++ // wide add
++ #define dct_wadd(out, a, b) \
++ __m128i out##_l = _mm_add_epi32(a##_l, b##_l); \
++ __m128i out##_h = _mm_add_epi32(a##_h, b##_h)
++
++ // wide sub
++ #define dct_wsub(out, a, b) \
++ __m128i out##_l = _mm_sub_epi32(a##_l, b##_l); \
++ __m128i out##_h = _mm_sub_epi32(a##_h, b##_h)
++
++ // butterfly a/b, add bias, then shift by "s" and pack
++ #define dct_bfly32o(out0, out1, a,b,bias,s) \
++ { \
++ __m128i abiased_l = _mm_add_epi32(a##_l, bias); \
++ __m128i abiased_h = _mm_add_epi32(a##_h, bias); \
++ dct_wadd(sum, abiased, b); \
++ dct_wsub(dif, abiased, b); \
++ out0 = _mm_packs_epi32(_mm_srai_epi32(sum_l, s), _mm_srai_epi32(sum_h, s)); \
++ out1 = _mm_packs_epi32(_mm_srai_epi32(dif_l, s), _mm_srai_epi32(dif_h, s)); \
++ }
++
++ // 8-bit interleave step (for transposes)
++ #define dct_interleave8(a, b) \
++ tmp = a; \
++ a = _mm_unpacklo_epi8(a, b); \
++ b = _mm_unpackhi_epi8(tmp, b)
++
++ // 16-bit interleave step (for transposes)
++ #define dct_interleave16(a, b) \
++ tmp = a; \
++ a = _mm_unpacklo_epi16(a, b); \
++ b = _mm_unpackhi_epi16(tmp, b)
++
++ #define dct_pass(bias,shift) \
++ { \
++ /* even part */ \
++ dct_rot(t2e,t3e, row2,row6, rot0_0,rot0_1); \
++ __m128i sum04 = _mm_add_epi16(row0, row4); \
++ __m128i dif04 = _mm_sub_epi16(row0, row4); \
++ dct_widen(t0e, sum04); \
++ dct_widen(t1e, dif04); \
++ dct_wadd(x0, t0e, t3e); \
++ dct_wsub(x3, t0e, t3e); \
++ dct_wadd(x1, t1e, t2e); \
++ dct_wsub(x2, t1e, t2e); \
++ /* odd part */ \
++ dct_rot(y0o,y2o, row7,row3, rot2_0,rot2_1); \
++ dct_rot(y1o,y3o, row5,row1, rot3_0,rot3_1); \
++ __m128i sum17 = _mm_add_epi16(row1, row7); \
++ __m128i sum35 = _mm_add_epi16(row3, row5); \
++ dct_rot(y4o,y5o, sum17,sum35, rot1_0,rot1_1); \
++ dct_wadd(x4, y0o, y4o); \
++ dct_wadd(x5, y1o, y5o); \
++ dct_wadd(x6, y2o, y5o); \
++ dct_wadd(x7, y3o, y4o); \
++ dct_bfly32o(row0,row7, x0,x7,bias,shift); \
++ dct_bfly32o(row1,row6, x1,x6,bias,shift); \
++ dct_bfly32o(row2,row5, x2,x5,bias,shift); \
++ dct_bfly32o(row3,row4, x3,x4,bias,shift); \
++ }
++
++ __m128i rot0_0 = dct_const(stbi__f2f(0.5411961f), stbi__f2f(0.5411961f) + stbi__f2f(-1.847759065f));
++ __m128i rot0_1 = dct_const(stbi__f2f(0.5411961f) + stbi__f2f( 0.765366865f), stbi__f2f(0.5411961f));
++ __m128i rot1_0 = dct_const(stbi__f2f(1.175875602f) + stbi__f2f(-0.899976223f), stbi__f2f(1.175875602f));
++ __m128i rot1_1 = dct_const(stbi__f2f(1.175875602f), stbi__f2f(1.175875602f) + stbi__f2f(-2.562915447f));
++ __m128i rot2_0 = dct_const(stbi__f2f(-1.961570560f) + stbi__f2f( 0.298631336f), stbi__f2f(-1.961570560f));
++ __m128i rot2_1 = dct_const(stbi__f2f(-1.961570560f), stbi__f2f(-1.961570560f) + stbi__f2f( 3.072711026f));
++ __m128i rot3_0 = dct_const(stbi__f2f(-0.390180644f) + stbi__f2f( 2.053119869f), stbi__f2f(-0.390180644f));
++ __m128i rot3_1 = dct_const(stbi__f2f(-0.390180644f), stbi__f2f(-0.390180644f) + stbi__f2f( 1.501321110f));
++
++ // rounding biases in column/row passes, see stbi__idct_block for explanation.
++ __m128i bias_0 = _mm_set1_epi32(512);
++ __m128i bias_1 = _mm_set1_epi32(65536 + (128<<17));
++
++ // load
++ row0 = _mm_load_si128((const __m128i *) (data + 0*8));
++ row1 = _mm_load_si128((const __m128i *) (data + 1*8));
++ row2 = _mm_load_si128((const __m128i *) (data + 2*8));
++ row3 = _mm_load_si128((const __m128i *) (data + 3*8));
++ row4 = _mm_load_si128((const __m128i *) (data + 4*8));
++ row5 = _mm_load_si128((const __m128i *) (data + 5*8));
++ row6 = _mm_load_si128((const __m128i *) (data + 6*8));
++ row7 = _mm_load_si128((const __m128i *) (data + 7*8));
++
++ // column pass
++ dct_pass(bias_0, 10);
++
++ {
++ // 16bit 8x8 transpose pass 1
++ dct_interleave16(row0, row4);
++ dct_interleave16(row1, row5);
++ dct_interleave16(row2, row6);
++ dct_interleave16(row3, row7);
++
++ // transpose pass 2
++ dct_interleave16(row0, row2);
++ dct_interleave16(row1, row3);
++ dct_interleave16(row4, row6);
++ dct_interleave16(row5, row7);
++
++ // transpose pass 3
++ dct_interleave16(row0, row1);
++ dct_interleave16(row2, row3);
++ dct_interleave16(row4, row5);
++ dct_interleave16(row6, row7);
++ }
++
++ // row pass
++ dct_pass(bias_1, 17);
++
++ {
++ // pack
++ __m128i p0 = _mm_packus_epi16(row0, row1); // a0a1a2a3...a7b0b1b2b3...b7
++ __m128i p1 = _mm_packus_epi16(row2, row3);
++ __m128i p2 = _mm_packus_epi16(row4, row5);
++ __m128i p3 = _mm_packus_epi16(row6, row7);
++
++ // 8bit 8x8 transpose pass 1
++ dct_interleave8(p0, p2); // a0e0a1e1...
++ dct_interleave8(p1, p3); // c0g0c1g1...
++
++ // transpose pass 2
++ dct_interleave8(p0, p1); // a0c0e0g0...
++ dct_interleave8(p2, p3); // b0d0f0h0...
++
++ // transpose pass 3
++ dct_interleave8(p0, p2); // a0b0c0d0...
++ dct_interleave8(p1, p3); // a4b4c4d4...
++
++ // store
++ _mm_storel_epi64((__m128i *) out, p0); out += out_stride;
++ _mm_storel_epi64((__m128i *) out, _mm_shuffle_epi32(p0, 0x4e)); out += out_stride;
++ _mm_storel_epi64((__m128i *) out, p2); out += out_stride;
++ _mm_storel_epi64((__m128i *) out, _mm_shuffle_epi32(p2, 0x4e)); out += out_stride;
++ _mm_storel_epi64((__m128i *) out, p1); out += out_stride;
++ _mm_storel_epi64((__m128i *) out, _mm_shuffle_epi32(p1, 0x4e)); out += out_stride;
++ _mm_storel_epi64((__m128i *) out, p3); out += out_stride;
++ _mm_storel_epi64((__m128i *) out, _mm_shuffle_epi32(p3, 0x4e));
++ }
++
++#undef dct_const
++#undef dct_rot
++#undef dct_widen
++#undef dct_wadd
++#undef dct_wsub
++#undef dct_bfly32o
++#undef dct_interleave8
++#undef dct_interleave16
++#undef dct_pass
++}
++
++#endif // STBI_SSE2
++
++#ifdef STBI_NEON
++
++// NEON integer IDCT. should produce bit-identical
++// results to the generic C version.
++static void stbi__idct_simd(stbi_uc *out, int out_stride, short data[64])
++{
++ int16x8_t row0, row1, row2, row3, row4, row5, row6, row7;
++
++ int16x4_t rot0_0 = vdup_n_s16(stbi__f2f(0.5411961f));
++ int16x4_t rot0_1 = vdup_n_s16(stbi__f2f(-1.847759065f));
++ int16x4_t rot0_2 = vdup_n_s16(stbi__f2f( 0.765366865f));
++ int16x4_t rot1_0 = vdup_n_s16(stbi__f2f( 1.175875602f));
++ int16x4_t rot1_1 = vdup_n_s16(stbi__f2f(-0.899976223f));
++ int16x4_t rot1_2 = vdup_n_s16(stbi__f2f(-2.562915447f));
++ int16x4_t rot2_0 = vdup_n_s16(stbi__f2f(-1.961570560f));
++ int16x4_t rot2_1 = vdup_n_s16(stbi__f2f(-0.390180644f));
++ int16x4_t rot3_0 = vdup_n_s16(stbi__f2f( 0.298631336f));
++ int16x4_t rot3_1 = vdup_n_s16(stbi__f2f( 2.053119869f));
++ int16x4_t rot3_2 = vdup_n_s16(stbi__f2f( 3.072711026f));
++ int16x4_t rot3_3 = vdup_n_s16(stbi__f2f( 1.501321110f));
++
++#define dct_long_mul(out, inq, coeff) \
++ int32x4_t out##_l = vmull_s16(vget_low_s16(inq), coeff); \
++ int32x4_t out##_h = vmull_s16(vget_high_s16(inq), coeff)
++
++#define dct_long_mac(out, acc, inq, coeff) \
++ int32x4_t out##_l = vmlal_s16(acc##_l, vget_low_s16(inq), coeff); \
++ int32x4_t out##_h = vmlal_s16(acc##_h, vget_high_s16(inq), coeff)
++
++#define dct_widen(out, inq) \
++ int32x4_t out##_l = vshll_n_s16(vget_low_s16(inq), 12); \
++ int32x4_t out##_h = vshll_n_s16(vget_high_s16(inq), 12)
++
++// wide add
++#define dct_wadd(out, a, b) \
++ int32x4_t out##_l = vaddq_s32(a##_l, b##_l); \
++ int32x4_t out##_h = vaddq_s32(a##_h, b##_h)
++
++// wide sub
++#define dct_wsub(out, a, b) \
++ int32x4_t out##_l = vsubq_s32(a##_l, b##_l); \
++ int32x4_t out##_h = vsubq_s32(a##_h, b##_h)
++
++// butterfly a/b, then shift using "shiftop" by "s" and pack
++#define dct_bfly32o(out0,out1, a,b,shiftop,s) \
++ { \
++ dct_wadd(sum, a, b); \
++ dct_wsub(dif, a, b); \
++ out0 = vcombine_s16(shiftop(sum_l, s), shiftop(sum_h, s)); \
++ out1 = vcombine_s16(shiftop(dif_l, s), shiftop(dif_h, s)); \
++ }
++
++#define dct_pass(shiftop, shift) \
++ { \
++ /* even part */ \
++ int16x8_t sum26 = vaddq_s16(row2, row6); \
++ dct_long_mul(p1e, sum26, rot0_0); \
++ dct_long_mac(t2e, p1e, row6, rot0_1); \
++ dct_long_mac(t3e, p1e, row2, rot0_2); \
++ int16x8_t sum04 = vaddq_s16(row0, row4); \
++ int16x8_t dif04 = vsubq_s16(row0, row4); \
++ dct_widen(t0e, sum04); \
++ dct_widen(t1e, dif04); \
++ dct_wadd(x0, t0e, t3e); \
++ dct_wsub(x3, t0e, t3e); \
++ dct_wadd(x1, t1e, t2e); \
++ dct_wsub(x2, t1e, t2e); \
++ /* odd part */ \
++ int16x8_t sum15 = vaddq_s16(row1, row5); \
++ int16x8_t sum17 = vaddq_s16(row1, row7); \
++ int16x8_t sum35 = vaddq_s16(row3, row5); \
++ int16x8_t sum37 = vaddq_s16(row3, row7); \
++ int16x8_t sumodd = vaddq_s16(sum17, sum35); \
++ dct_long_mul(p5o, sumodd, rot1_0); \
++ dct_long_mac(p1o, p5o, sum17, rot1_1); \
++ dct_long_mac(p2o, p5o, sum35, rot1_2); \
++ dct_long_mul(p3o, sum37, rot2_0); \
++ dct_long_mul(p4o, sum15, rot2_1); \
++ dct_wadd(sump13o, p1o, p3o); \
++ dct_wadd(sump24o, p2o, p4o); \
++ dct_wadd(sump23o, p2o, p3o); \
++ dct_wadd(sump14o, p1o, p4o); \
++ dct_long_mac(x4, sump13o, row7, rot3_0); \
++ dct_long_mac(x5, sump24o, row5, rot3_1); \
++ dct_long_mac(x6, sump23o, row3, rot3_2); \
++ dct_long_mac(x7, sump14o, row1, rot3_3); \
++ dct_bfly32o(row0,row7, x0,x7,shiftop,shift); \
++ dct_bfly32o(row1,row6, x1,x6,shiftop,shift); \
++ dct_bfly32o(row2,row5, x2,x5,shiftop,shift); \
++ dct_bfly32o(row3,row4, x3,x4,shiftop,shift); \
++ }
++
++ // load
++ row0 = vld1q_s16(data + 0*8);
++ row1 = vld1q_s16(data + 1*8);
++ row2 = vld1q_s16(data + 2*8);
++ row3 = vld1q_s16(data + 3*8);
++ row4 = vld1q_s16(data + 4*8);
++ row5 = vld1q_s16(data + 5*8);
++ row6 = vld1q_s16(data + 6*8);
++ row7 = vld1q_s16(data + 7*8);
++
++ // add DC bias
++ row0 = vaddq_s16(row0, vsetq_lane_s16(1024, vdupq_n_s16(0), 0));
++
++ // column pass
++ dct_pass(vrshrn_n_s32, 10);
++
++ // 16bit 8x8 transpose
++ {
++// these three map to a single VTRN.16, VTRN.32, and VSWP, respectively.
++// whether compilers actually get this is another story, sadly.
++#define dct_trn16(x, y) { int16x8x2_t t = vtrnq_s16(x, y); x = t.val[0]; y = t.val[1]; }
++#define dct_trn32(x, y) { int32x4x2_t t = vtrnq_s32(vreinterpretq_s32_s16(x), vreinterpretq_s32_s16(y)); x = vreinterpretq_s16_s32(t.val[0]); y = vreinterpretq_s16_s32(t.val[1]); }
++#define dct_trn64(x, y) { int16x8_t x0 = x; int16x8_t y0 = y; x = vcombine_s16(vget_low_s16(x0), vget_low_s16(y0)); y = vcombine_s16(vget_high_s16(x0), vget_high_s16(y0)); }
++
++ // pass 1
++ dct_trn16(row0, row1); // a0b0a2b2a4b4a6b6
++ dct_trn16(row2, row3);
++ dct_trn16(row4, row5);
++ dct_trn16(row6, row7);
++
++ // pass 2
++ dct_trn32(row0, row2); // a0b0c0d0a4b4c4d4
++ dct_trn32(row1, row3);
++ dct_trn32(row4, row6);
++ dct_trn32(row5, row7);
++
++ // pass 3
++ dct_trn64(row0, row4); // a0b0c0d0e0f0g0h0
++ dct_trn64(row1, row5);
++ dct_trn64(row2, row6);
++ dct_trn64(row3, row7);
++
++#undef dct_trn16
++#undef dct_trn32
++#undef dct_trn64
++ }
++
++ // row pass
++ // vrshrn_n_s32 only supports shifts up to 16, we need
++ // 17. so do a non-rounding shift of 16 first then follow
++ // up with a rounding shift by 1.
++ dct_pass(vshrn_n_s32, 16);
++
++ {
++ // pack and round
++ uint8x8_t p0 = vqrshrun_n_s16(row0, 1);
++ uint8x8_t p1 = vqrshrun_n_s16(row1, 1);
++ uint8x8_t p2 = vqrshrun_n_s16(row2, 1);
++ uint8x8_t p3 = vqrshrun_n_s16(row3, 1);
++ uint8x8_t p4 = vqrshrun_n_s16(row4, 1);
++ uint8x8_t p5 = vqrshrun_n_s16(row5, 1);
++ uint8x8_t p6 = vqrshrun_n_s16(row6, 1);
++ uint8x8_t p7 = vqrshrun_n_s16(row7, 1);
++
++ // again, these can translate into one instruction, but often don't.
++#define dct_trn8_8(x, y) { uint8x8x2_t t = vtrn_u8(x, y); x = t.val[0]; y = t.val[1]; }
++#define dct_trn8_16(x, y) { uint16x4x2_t t = vtrn_u16(vreinterpret_u16_u8(x), vreinterpret_u16_u8(y)); x = vreinterpret_u8_u16(t.val[0]); y = vreinterpret_u8_u16(t.val[1]); }
++#define dct_trn8_32(x, y) { uint32x2x2_t t = vtrn_u32(vreinterpret_u32_u8(x), vreinterpret_u32_u8(y)); x = vreinterpret_u8_u32(t.val[0]); y = vreinterpret_u8_u32(t.val[1]); }
++
++ // sadly can't use interleaved stores here since we only write
++ // 8 bytes to each scan line!
++
++ // 8x8 8-bit transpose pass 1
++ dct_trn8_8(p0, p1);
++ dct_trn8_8(p2, p3);
++ dct_trn8_8(p4, p5);
++ dct_trn8_8(p6, p7);
++
++ // pass 2
++ dct_trn8_16(p0, p2);
++ dct_trn8_16(p1, p3);
++ dct_trn8_16(p4, p6);
++ dct_trn8_16(p5, p7);
++
++ // pass 3
++ dct_trn8_32(p0, p4);
++ dct_trn8_32(p1, p5);
++ dct_trn8_32(p2, p6);
++ dct_trn8_32(p3, p7);
++
++ // store
++ vst1_u8(out, p0); out += out_stride;
++ vst1_u8(out, p1); out += out_stride;
++ vst1_u8(out, p2); out += out_stride;
++ vst1_u8(out, p3); out += out_stride;
++ vst1_u8(out, p4); out += out_stride;
++ vst1_u8(out, p5); out += out_stride;
++ vst1_u8(out, p6); out += out_stride;
++ vst1_u8(out, p7);
++
++#undef dct_trn8_8
++#undef dct_trn8_16
++#undef dct_trn8_32
++ }
++
++#undef dct_long_mul
++#undef dct_long_mac
++#undef dct_widen
++#undef dct_wadd
++#undef dct_wsub
++#undef dct_bfly32o
++#undef dct_pass
++}
++
++#endif // STBI_NEON
++
++#define STBI__MARKER_none 0xff
++// if there's a pending marker from the entropy stream, return that
++// otherwise, fetch from the stream and get a marker. if there's no
++// marker, return 0xff, which is never a valid marker value
++static stbi_uc stbi__get_marker(stbi__jpeg *j)
++{
++ stbi_uc x;
++ if (j->marker != STBI__MARKER_none) { x = j->marker; j->marker = STBI__MARKER_none; return x; }
++ x = stbi__get8(j->s);
++ if (x != 0xff) return STBI__MARKER_none;
++ while (x == 0xff)
++ x = stbi__get8(j->s); // consume repeated 0xff fill bytes
++ return x;
++}
++
++// in each scan, we'll have scan_n components, and the order
++// of the components is specified by order[]
++#define STBI__RESTART(x) ((x) >= 0xd0 && (x) <= 0xd7)
++
++// after a restart interval, stbi__jpeg_reset the entropy decoder and
++// the dc prediction
++static void stbi__jpeg_reset(stbi__jpeg *j)
++{
++ j->code_bits = 0;
++ j->code_buffer = 0;
++ j->nomore = 0;
++ j->img_comp[0].dc_pred = j->img_comp[1].dc_pred = j->img_comp[2].dc_pred = j->img_comp[3].dc_pred = 0;
++ j->marker = STBI__MARKER_none;
++ j->todo = j->restart_interval ? j->restart_interval : 0x7fffffff;
++ j->eob_run = 0;
++ // no more than 1<<31 MCUs if no restart_interal? that's plenty safe,
++ // since we don't even allow 1<<30 pixels
++}
++
++static int stbi__parse_entropy_coded_data(stbi__jpeg *z)
++{
++ stbi__jpeg_reset(z);
++ if (!z->progressive) {
++ if (z->scan_n == 1) {
++ int i,j;
++ STBI_SIMD_ALIGN(short, data[64]);
++ int n = z->order[0];
++ // non-interleaved data, we just need to process one block at a time,
++ // in trivial scanline order
++ // number of blocks to do just depends on how many actual "pixels" this
++ // component has, independent of interleaved MCU blocking and such
++ int w = (z->img_comp[n].x+7) >> 3;
++ int h = (z->img_comp[n].y+7) >> 3;
++ for (j=0; j < h; ++j) {
++ for (i=0; i < w; ++i) {
++ int ha = z->img_comp[n].ha;
++ if (!stbi__jpeg_decode_block(z, data, z->huff_dc+z->img_comp[n].hd, z->huff_ac+ha, z->fast_ac[ha], n, z->dequant[z->img_comp[n].tq])) return 0;
++ z->idct_block_kernel(z->img_comp[n].data+z->img_comp[n].w2*j*8+i*8, z->img_comp[n].w2, data);
++ // every data block is an MCU, so countdown the restart interval
++ if (--z->todo <= 0) {
++ if (z->code_bits < 24) stbi__grow_buffer_unsafe(z);
++ // if it's NOT a restart, then just bail, so we get corrupt data
++ // rather than no data
++ if (!STBI__RESTART(z->marker)) return 1;
++ stbi__jpeg_reset(z);
++ }
++ }
++ }
++ return 1;
++ } else { // interleaved
++ int i,j,k,x,y;
++ STBI_SIMD_ALIGN(short, data[64]);
++ for (j=0; j < z->img_mcu_y; ++j) {
++ for (i=0; i < z->img_mcu_x; ++i) {
++ // scan an interleaved mcu... process scan_n components in order
++ for (k=0; k < z->scan_n; ++k) {
++ int n = z->order[k];
++ // scan out an mcu's worth of this component; that's just determined
++ // by the basic H and V specified for the component
++ for (y=0; y < z->img_comp[n].v; ++y) {
++ for (x=0; x < z->img_comp[n].h; ++x) {
++ int x2 = (i*z->img_comp[n].h + x)*8;
++ int y2 = (j*z->img_comp[n].v + y)*8;
++ int ha = z->img_comp[n].ha;
++ if (!stbi__jpeg_decode_block(z, data, z->huff_dc+z->img_comp[n].hd, z->huff_ac+ha, z->fast_ac[ha], n, z->dequant[z->img_comp[n].tq])) return 0;
++ z->idct_block_kernel(z->img_comp[n].data+z->img_comp[n].w2*y2+x2, z->img_comp[n].w2, data);
++ }
++ }
++ }
++ // after all interleaved components, that's an interleaved MCU,
++ // so now count down the restart interval
++ if (--z->todo <= 0) {
++ if (z->code_bits < 24) stbi__grow_buffer_unsafe(z);
++ if (!STBI__RESTART(z->marker)) return 1;
++ stbi__jpeg_reset(z);
++ }
++ }
++ }
++ return 1;
++ }
++ } else {
++ if (z->scan_n == 1) {
++ int i,j;
++ int n = z->order[0];
++ // non-interleaved data, we just need to process one block at a time,
++ // in trivial scanline order
++ // number of blocks to do just depends on how many actual "pixels" this
++ // component has, independent of interleaved MCU blocking and such
++ int w = (z->img_comp[n].x+7) >> 3;
++ int h = (z->img_comp[n].y+7) >> 3;
++ for (j=0; j < h; ++j) {
++ for (i=0; i < w; ++i) {
++ short *data = z->img_comp[n].coeff + 64 * (i + j * z->img_comp[n].coeff_w);
++ if (z->spec_start == 0) {
++ if (!stbi__jpeg_decode_block_prog_dc(z, data, &z->huff_dc[z->img_comp[n].hd], n))
++ return 0;
++ } else {
++ int ha = z->img_comp[n].ha;
++ if (!stbi__jpeg_decode_block_prog_ac(z, data, &z->huff_ac[ha], z->fast_ac[ha]))
++ return 0;
++ }
++ // every data block is an MCU, so countdown the restart interval
++ if (--z->todo <= 0) {
++ if (z->code_bits < 24) stbi__grow_buffer_unsafe(z);
++ if (!STBI__RESTART(z->marker)) return 1;
++ stbi__jpeg_reset(z);
++ }
++ }
++ }
++ return 1;
++ } else { // interleaved
++ int i,j,k,x,y;
++ for (j=0; j < z->img_mcu_y; ++j) {
++ for (i=0; i < z->img_mcu_x; ++i) {
++ // scan an interleaved mcu... process scan_n components in order
++ for (k=0; k < z->scan_n; ++k) {
++ int n = z->order[k];
++ // scan out an mcu's worth of this component; that's just determined
++ // by the basic H and V specified for the component
++ for (y=0; y < z->img_comp[n].v; ++y) {
++ for (x=0; x < z->img_comp[n].h; ++x) {
++ int x2 = (i*z->img_comp[n].h + x);
++ int y2 = (j*z->img_comp[n].v + y);
++ short *data = z->img_comp[n].coeff + 64 * (x2 + y2 * z->img_comp[n].coeff_w);
++ if (!stbi__jpeg_decode_block_prog_dc(z, data, &z->huff_dc[z->img_comp[n].hd], n))
++ return 0;
++ }
++ }
++ }
++ // after all interleaved components, that's an interleaved MCU,
++ // so now count down the restart interval
++ if (--z->todo <= 0) {
++ if (z->code_bits < 24) stbi__grow_buffer_unsafe(z);
++ if (!STBI__RESTART(z->marker)) return 1;
++ stbi__jpeg_reset(z);
++ }
++ }
++ }
++ return 1;
++ }
++ }
++}
++
++static void stbi__jpeg_dequantize(short *data, stbi__uint16 *dequant)
++{
++ int i;
++ for (i=0; i < 64; ++i)
++ data[i] *= dequant[i];
++}
++
++static void stbi__jpeg_finish(stbi__jpeg *z)
++{
++ if (z->progressive) {
++ // dequantize and idct the data
++ int i,j,n;
++ for (n=0; n < z->s->img_n; ++n) {
++ int w = (z->img_comp[n].x+7) >> 3;
++ int h = (z->img_comp[n].y+7) >> 3;
++ for (j=0; j < h; ++j) {
++ for (i=0; i < w; ++i) {
++ short *data = z->img_comp[n].coeff + 64 * (i + j * z->img_comp[n].coeff_w);
++ stbi__jpeg_dequantize(data, z->dequant[z->img_comp[n].tq]);
++ z->idct_block_kernel(z->img_comp[n].data+z->img_comp[n].w2*j*8+i*8, z->img_comp[n].w2, data);
++ }
++ }
++ }
++ }
++}
++
++static int stbi__process_marker(stbi__jpeg *z, int m)
++{
++ int L;
++ switch (m) {
++ case STBI__MARKER_none: // no marker found
++ return stbi__err("expected marker","Corrupt JPEG");
++
++ case 0xDD: // DRI - specify restart interval
++ if (stbi__get16be(z->s) != 4) return stbi__err("bad DRI len","Corrupt JPEG");
++ z->restart_interval = stbi__get16be(z->s);
++ return 1;
++
++ case 0xDB: // DQT - define quantization table
++ L = stbi__get16be(z->s)-2;
++ while (L > 0) {
++ int q = stbi__get8(z->s);
++ int p = q >> 4, sixteen = (p != 0);
++ int t = q & 15,i;
++ if (p != 0 && p != 1) return stbi__err("bad DQT type","Corrupt JPEG");
++ if (t > 3) return stbi__err("bad DQT table","Corrupt JPEG");
++
++ for (i=0; i < 64; ++i)
++ z->dequant[t][stbi__jpeg_dezigzag[i]] = (stbi__uint16)(sixteen ? stbi__get16be(z->s) : stbi__get8(z->s));
++ L -= (sixteen ? 129 : 65);
++ }
++ return L==0;
++
++ case 0xC4: // DHT - define huffman table
++ L = stbi__get16be(z->s)-2;
++ while (L > 0) {
++ stbi_uc *v;
++ int sizes[16],i,n=0;
++ int q = stbi__get8(z->s);
++ int tc = q >> 4;
++ int th = q & 15;
++ if (tc > 1 || th > 3) return stbi__err("bad DHT header","Corrupt JPEG");
++ for (i=0; i < 16; ++i) {
++ sizes[i] = stbi__get8(z->s);
++ n += sizes[i];
++ }
++ L -= 17;
++ if (tc == 0) {
++ if (!stbi__build_huffman(z->huff_dc+th, sizes)) return 0;
++ v = z->huff_dc[th].values;
++ } else {
++ if (!stbi__build_huffman(z->huff_ac+th, sizes)) return 0;
++ v = z->huff_ac[th].values;
++ }
++ for (i=0; i < n; ++i)
++ v[i] = stbi__get8(z->s);
++ if (tc != 0)
++ stbi__build_fast_ac(z->fast_ac[th], z->huff_ac + th);
++ L -= n;
++ }
++ return L==0;
++ }
++
++ // check for comment block or APP blocks
++ if ((m >= 0xE0 && m <= 0xEF) || m == 0xFE) {
++ L = stbi__get16be(z->s);
++ if (L < 2) {
++ if (m == 0xFE)
++ return stbi__err("bad COM len","Corrupt JPEG");
++ else
++ return stbi__err("bad APP len","Corrupt JPEG");
++ }
++ L -= 2;
++
++ if (m == 0xE0 && L >= 5) { // JFIF APP0 segment
++ static const unsigned char tag[5] = {'J','F','I','F','\0'};
++ int ok = 1;
++ int i;
++ for (i=0; i < 5; ++i)
++ if (stbi__get8(z->s) != tag[i])
++ ok = 0;
++ L -= 5;
++ if (ok)
++ z->jfif = 1;
++ } else if (m == 0xEE && L >= 12) { // Adobe APP14 segment
++ static const unsigned char tag[6] = {'A','d','o','b','e','\0'};
++ int ok = 1;
++ int i;
++ for (i=0; i < 6; ++i)
++ if (stbi__get8(z->s) != tag[i])
++ ok = 0;
++ L -= 6;
++ if (ok) {
++ stbi__get8(z->s); // version
++ stbi__get16be(z->s); // flags0
++ stbi__get16be(z->s); // flags1
++ z->app14_color_transform = stbi__get8(z->s); // color transform
++ L -= 6;
++ }
++ }
++
++ stbi__skip(z->s, L);
++ return 1;
++ }
++
++ return stbi__err("unknown marker","Corrupt JPEG");
++}
++
++// after we see SOS
++static int stbi__process_scan_header(stbi__jpeg *z)
++{
++ int i;
++ int Ls = stbi__get16be(z->s);
++ z->scan_n = stbi__get8(z->s);
++ if (z->scan_n < 1 || z->scan_n > 4 || z->scan_n > (int) z->s->img_n) return stbi__err("bad SOS component count","Corrupt JPEG");
++ if (Ls != 6+2*z->scan_n) return stbi__err("bad SOS len","Corrupt JPEG");
++ for (i=0; i < z->scan_n; ++i) {
++ int id = stbi__get8(z->s), which;
++ int q = stbi__get8(z->s);
++ for (which = 0; which < z->s->img_n; ++which)
++ if (z->img_comp[which].id == id)
++ break;
++ if (which == z->s->img_n) return 0; // no match
++ z->img_comp[which].hd = q >> 4; if (z->img_comp[which].hd > 3) return stbi__err("bad DC huff","Corrupt JPEG");
++ z->img_comp[which].ha = q & 15; if (z->img_comp[which].ha > 3) return stbi__err("bad AC huff","Corrupt JPEG");
++ z->order[i] = which;
++ }
++
++ {
++ int aa;
++ z->spec_start = stbi__get8(z->s);
++ z->spec_end = stbi__get8(z->s); // should be 63, but might be 0
++ aa = stbi__get8(z->s);
++ z->succ_high = (aa >> 4);
++ z->succ_low = (aa & 15);
++ if (z->progressive) {
++ if (z->spec_start > 63 || z->spec_end > 63 || z->spec_start > z->spec_end || z->succ_high > 13 || z->succ_low > 13)
++ return stbi__err("bad SOS", "Corrupt JPEG");
++ } else {
++ if (z->spec_start != 0) return stbi__err("bad SOS","Corrupt JPEG");
++ if (z->succ_high != 0 || z->succ_low != 0) return stbi__err("bad SOS","Corrupt JPEG");
++ z->spec_end = 63;
++ }
++ }
++
++ return 1;
++}
++
++static int stbi__free_jpeg_components(stbi__jpeg *z, int ncomp, int why)
++{
++ int i;
++ for (i=0; i < ncomp; ++i) {
++ if (z->img_comp[i].raw_data) {
++ STBI_FREE(z->img_comp[i].raw_data);
++ z->img_comp[i].raw_data = NULL;
++ z->img_comp[i].data = NULL;
++ }
++ if (z->img_comp[i].raw_coeff) {
++ STBI_FREE(z->img_comp[i].raw_coeff);
++ z->img_comp[i].raw_coeff = 0;
++ z->img_comp[i].coeff = 0;
++ }
++ if (z->img_comp[i].linebuf) {
++ STBI_FREE(z->img_comp[i].linebuf);
++ z->img_comp[i].linebuf = NULL;
++ }
++ }
++ return why;
++}
++
++static int stbi__process_frame_header(stbi__jpeg *z, int scan)
++{
++ stbi__context *s = z->s;
++ int Lf,p,i,q, h_max=1,v_max=1,c;
++ Lf = stbi__get16be(s); if (Lf < 11) return stbi__err("bad SOF len","Corrupt JPEG"); // JPEG
++ p = stbi__get8(s); if (p != 8) return stbi__err("only 8-bit","JPEG format not supported: 8-bit only"); // JPEG baseline
++ s->img_y = stbi__get16be(s); if (s->img_y == 0) return stbi__err("no header height", "JPEG format not supported: delayed height"); // Legal, but we don't handle it--but neither does IJG
++ s->img_x = stbi__get16be(s); if (s->img_x == 0) return stbi__err("0 width","Corrupt JPEG"); // JPEG requires
++ c = stbi__get8(s);
++ if (c != 3 && c != 1 && c != 4) return stbi__err("bad component count","Corrupt JPEG");
++ s->img_n = c;
++ for (i=0; i < c; ++i) {
++ z->img_comp[i].data = NULL;
++ z->img_comp[i].linebuf = NULL;
++ }
++
++ if (Lf != 8+3*s->img_n) return stbi__err("bad SOF len","Corrupt JPEG");
++
++ z->rgb = 0;
++ for (i=0; i < s->img_n; ++i) {
++ static const unsigned char rgb[3] = { 'R', 'G', 'B' };
++ z->img_comp[i].id = stbi__get8(s);
++ if (s->img_n == 3 && z->img_comp[i].id == rgb[i])
++ ++z->rgb;
++ q = stbi__get8(s);
++ z->img_comp[i].h = (q >> 4); if (!z->img_comp[i].h || z->img_comp[i].h > 4) return stbi__err("bad H","Corrupt JPEG");
++ z->img_comp[i].v = q & 15; if (!z->img_comp[i].v || z->img_comp[i].v > 4) return stbi__err("bad V","Corrupt JPEG");
++ z->img_comp[i].tq = stbi__get8(s); if (z->img_comp[i].tq > 3) return stbi__err("bad TQ","Corrupt JPEG");
++ }
++
++ if (scan != STBI__SCAN_load) return 1;
++
++ if (!stbi__mad3sizes_valid(s->img_x, s->img_y, s->img_n, 0)) return stbi__err("too large", "Image too large to decode");
++
++ for (i=0; i < s->img_n; ++i) {
++ if (z->img_comp[i].h > h_max) h_max = z->img_comp[i].h;
++ if (z->img_comp[i].v > v_max) v_max = z->img_comp[i].v;
++ }
++
++ // compute interleaved mcu info
++ z->img_h_max = h_max;
++ z->img_v_max = v_max;
++ z->img_mcu_w = h_max * 8;
++ z->img_mcu_h = v_max * 8;
++ // these sizes can't be more than 17 bits
++ z->img_mcu_x = (s->img_x + z->img_mcu_w-1) / z->img_mcu_w;
++ z->img_mcu_y = (s->img_y + z->img_mcu_h-1) / z->img_mcu_h;
++
++ for (i=0; i < s->img_n; ++i) {
++ // number of effective pixels (e.g. for non-interleaved MCU)
++ z->img_comp[i].x = (s->img_x * z->img_comp[i].h + h_max-1) / h_max;
++ z->img_comp[i].y = (s->img_y * z->img_comp[i].v + v_max-1) / v_max;
++ // to simplify generation, we'll allocate enough memory to decode
++ // the bogus oversized data from using interleaved MCUs and their
++ // big blocks (e.g. a 16x16 iMCU on an image of width 33); we won't
++ // discard the extra data until colorspace conversion
++ //
++ // img_mcu_x, img_mcu_y: <=17 bits; comp[i].h and .v are <=4 (checked earlier)
++ // so these muls can't overflow with 32-bit ints (which we require)
++ z->img_comp[i].w2 = z->img_mcu_x * z->img_comp[i].h * 8;
++ z->img_comp[i].h2 = z->img_mcu_y * z->img_comp[i].v * 8;
++ z->img_comp[i].coeff = 0;
++ z->img_comp[i].raw_coeff = 0;
++ z->img_comp[i].linebuf = NULL;
++ z->img_comp[i].raw_data = stbi__malloc_mad2(z->img_comp[i].w2, z->img_comp[i].h2, 15);
++ if (z->img_comp[i].raw_data == NULL)
++ return stbi__free_jpeg_components(z, i+1, stbi__err("outofmem", "Out of memory"));
++ // align blocks for idct using mmx/sse
++ z->img_comp[i].data = (stbi_uc*) (((size_t) z->img_comp[i].raw_data + 15) & ~15);
++ if (z->progressive) {
++ // w2, h2 are multiples of 8 (see above)
++ z->img_comp[i].coeff_w = z->img_comp[i].w2 / 8;
++ z->img_comp[i].coeff_h = z->img_comp[i].h2 / 8;
++ z->img_comp[i].raw_coeff = stbi__malloc_mad3(z->img_comp[i].w2, z->img_comp[i].h2, sizeof(short), 15);
++ if (z->img_comp[i].raw_coeff == NULL)
++ return stbi__free_jpeg_components(z, i+1, stbi__err("outofmem", "Out of memory"));
++ z->img_comp[i].coeff = (short*) (((size_t) z->img_comp[i].raw_coeff + 15) & ~15);
++ }
++ }
++
++ return 1;
++}
++
++// use comparisons since in some cases we handle more than one case (e.g. SOF)
++#define stbi__DNL(x) ((x) == 0xdc)
++#define stbi__SOI(x) ((x) == 0xd8)
++#define stbi__EOI(x) ((x) == 0xd9)
++#define stbi__SOF(x) ((x) == 0xc0 || (x) == 0xc1 || (x) == 0xc2)
++#define stbi__SOS(x) ((x) == 0xda)
++
++#define stbi__SOF_progressive(x) ((x) == 0xc2)
++
++static int stbi__decode_jpeg_header(stbi__jpeg *z, int scan)
++{
++ int m;
++ z->jfif = 0;
++ z->app14_color_transform = -1; // valid values are 0,1,2
++ z->marker = STBI__MARKER_none; // initialize cached marker to empty
++ m = stbi__get_marker(z);
++ if (!stbi__SOI(m)) return stbi__err("no SOI","Corrupt JPEG");
++ if (scan == STBI__SCAN_type) return 1;
++ m = stbi__get_marker(z);
++ while (!stbi__SOF(m)) {
++ if (!stbi__process_marker(z,m)) return 0;
++ m = stbi__get_marker(z);
++ while (m == STBI__MARKER_none) {
++ // some files have extra padding after their blocks, so ok, we'll scan
++ if (stbi__at_eof(z->s)) return stbi__err("no SOF", "Corrupt JPEG");
++ m = stbi__get_marker(z);
++ }
++ }
++ z->progressive = stbi__SOF_progressive(m);
++ if (!stbi__process_frame_header(z, scan)) return 0;
++ return 1;
++}
++
++// decode image to YCbCr format
++static int stbi__decode_jpeg_image(stbi__jpeg *j)
++{
++ int m;
++ for (m = 0; m < 4; m++) {
++ j->img_comp[m].raw_data = NULL;
++ j->img_comp[m].raw_coeff = NULL;
++ }
++ j->restart_interval = 0;
++ if (!stbi__decode_jpeg_header(j, STBI__SCAN_load)) return 0;
++ m = stbi__get_marker(j);
++ while (!stbi__EOI(m)) {
++ if (stbi__SOS(m)) {
++ if (!stbi__process_scan_header(j)) return 0;
++ if (!stbi__parse_entropy_coded_data(j)) return 0;
++ if (j->marker == STBI__MARKER_none ) {
++ // handle 0s at the end of image data from IP Kamera 9060
++ while (!stbi__at_eof(j->s)) {
++ int x = stbi__get8(j->s);
++ if (x == 255) {
++ j->marker = stbi__get8(j->s);
++ break;
++ }
++ }
++ // if we reach eof without hitting a marker, stbi__get_marker() below will fail and we'll eventually return 0
++ }
++ } else if (stbi__DNL(m)) {
++ int Ld = stbi__get16be(j->s);
++ stbi__uint32 NL = stbi__get16be(j->s);
++ if (Ld != 4) return stbi__err("bad DNL len", "Corrupt JPEG");
++ if (NL != j->s->img_y) return stbi__err("bad DNL height", "Corrupt JPEG");
++ } else {
++ if (!stbi__process_marker(j, m)) return 0;
++ }
++ m = stbi__get_marker(j);
++ }
++ if (j->progressive)
++ stbi__jpeg_finish(j);
++ return 1;
++}
++
++// static jfif-centered resampling (across block boundaries)
++
++typedef stbi_uc *(*resample_row_func)(stbi_uc *out, stbi_uc *in0, stbi_uc *in1,
++ int w, int hs);
++
++#define stbi__div4(x) ((stbi_uc) ((x) >> 2))
++
++static stbi_uc *resample_row_1(stbi_uc *out, stbi_uc *in_near, stbi_uc *in_far, int w, int hs)
++{
++ STBI_NOTUSED(out);
++ STBI_NOTUSED(in_far);
++ STBI_NOTUSED(w);
++ STBI_NOTUSED(hs);
++ return in_near;
++}
++
++static stbi_uc* stbi__resample_row_v_2(stbi_uc *out, stbi_uc *in_near, stbi_uc *in_far, int w, int hs)
++{
++ // need to generate two samples vertically for every one in input
++ int i;
++ STBI_NOTUSED(hs);
++ for (i=0; i < w; ++i)
++ out[i] = stbi__div4(3*in_near[i] + in_far[i] + 2);
++ return out;
++}
++
++static stbi_uc* stbi__resample_row_h_2(stbi_uc *out, stbi_uc *in_near, stbi_uc *in_far, int w, int hs)
++{
++ // need to generate two samples horizontally for every one in input
++ int i;
++ stbi_uc *input = in_near;
++
++ if (w == 1) {
++ // if only one sample, can't do any interpolation
++ out[0] = out[1] = input[0];
++ return out;
++ }
++
++ out[0] = input[0];
++ out[1] = stbi__div4(input[0]*3 + input[1] + 2);
++ for (i=1; i < w-1; ++i) {
++ int n = 3*input[i]+2;
++ out[i*2+0] = stbi__div4(n+input[i-1]);
++ out[i*2+1] = stbi__div4(n+input[i+1]);
++ }
++ out[i*2+0] = stbi__div4(input[w-2]*3 + input[w-1] + 2);
++ out[i*2+1] = input[w-1];
++
++ STBI_NOTUSED(in_far);
++ STBI_NOTUSED(hs);
++
++ return out;
++}
++
++#define stbi__div16(x) ((stbi_uc) ((x) >> 4))
++
++static stbi_uc *stbi__resample_row_hv_2(stbi_uc *out, stbi_uc *in_near, stbi_uc *in_far, int w, int hs)
++{
++ // need to generate 2x2 samples for every one in input
++ int i,t0,t1;
++ if (w == 1) {
++ out[0] = out[1] = stbi__div4(3*in_near[0] + in_far[0] + 2);
++ return out;
++ }
++
++ t1 = 3*in_near[0] + in_far[0];
++ out[0] = stbi__div4(t1+2);
++ for (i=1; i < w; ++i) {
++ t0 = t1;
++ t1 = 3*in_near[i]+in_far[i];
++ out[i*2-1] = stbi__div16(3*t0 + t1 + 8);
++ out[i*2 ] = stbi__div16(3*t1 + t0 + 8);
++ }
++ out[w*2-1] = stbi__div4(t1+2);
++
++ STBI_NOTUSED(hs);
++
++ return out;
++}
++
++#if defined(STBI_SSE2) || defined(STBI_NEON)
++static stbi_uc *stbi__resample_row_hv_2_simd(stbi_uc *out, stbi_uc *in_near, stbi_uc *in_far, int w, int hs)
++{
++ // need to generate 2x2 samples for every one in input
++ int i=0,t0,t1;
++
++ if (w == 1) {
++ out[0] = out[1] = stbi__div4(3*in_near[0] + in_far[0] + 2);
++ return out;
++ }
++
++ t1 = 3*in_near[0] + in_far[0];
++ // process groups of 8 pixels for as long as we can.
++ // note we can't handle the last pixel in a row in this loop
++ // because we need to handle the filter boundary conditions.
++ for (; i < ((w-1) & ~7); i += 8) {
++#if defined(STBI_SSE2)
++ // load and perform the vertical filtering pass
++ // this uses 3*x + y = 4*x + (y - x)
++ __m128i zero = _mm_setzero_si128();
++ __m128i farb = _mm_loadl_epi64((__m128i *) (in_far + i));
++ __m128i nearb = _mm_loadl_epi64((__m128i *) (in_near + i));
++ __m128i farw = _mm_unpacklo_epi8(farb, zero);
++ __m128i nearw = _mm_unpacklo_epi8(nearb, zero);
++ __m128i diff = _mm_sub_epi16(farw, nearw);
++ __m128i nears = _mm_slli_epi16(nearw, 2);
++ __m128i curr = _mm_add_epi16(nears, diff); // current row
++
++ // horizontal filter works the same based on shifted vers of current
++ // row. "prev" is current row shifted right by 1 pixel; we need to
++ // insert the previous pixel value (from t1).
++ // "next" is current row shifted left by 1 pixel, with first pixel
++ // of next block of 8 pixels added in.
++ __m128i prv0 = _mm_slli_si128(curr, 2);
++ __m128i nxt0 = _mm_srli_si128(curr, 2);
++ __m128i prev = _mm_insert_epi16(prv0, t1, 0);
++ __m128i next = _mm_insert_epi16(nxt0, 3*in_near[i+8] + in_far[i+8], 7);
++
++ // horizontal filter, polyphase implementation since it's convenient:
++ // even pixels = 3*cur + prev = cur*4 + (prev - cur)
++ // odd pixels = 3*cur + next = cur*4 + (next - cur)
++ // note the shared term.
++ __m128i bias = _mm_set1_epi16(8);
++ __m128i curs = _mm_slli_epi16(curr, 2);
++ __m128i prvd = _mm_sub_epi16(prev, curr);
++ __m128i nxtd = _mm_sub_epi16(next, curr);
++ __m128i curb = _mm_add_epi16(curs, bias);
++ __m128i even = _mm_add_epi16(prvd, curb);
++ __m128i odd = _mm_add_epi16(nxtd, curb);
++
++ // interleave even and odd pixels, then undo scaling.
++ __m128i int0 = _mm_unpacklo_epi16(even, odd);
++ __m128i int1 = _mm_unpackhi_epi16(even, odd);
++ __m128i de0 = _mm_srli_epi16(int0, 4);
++ __m128i de1 = _mm_srli_epi16(int1, 4);
++
++ // pack and write output
++ __m128i outv = _mm_packus_epi16(de0, de1);
++ _mm_storeu_si128((__m128i *) (out + i*2), outv);
++#elif defined(STBI_NEON)
++ // load and perform the vertical filtering pass
++ // this uses 3*x + y = 4*x + (y - x)
++ uint8x8_t farb = vld1_u8(in_far + i);
++ uint8x8_t nearb = vld1_u8(in_near + i);
++ int16x8_t diff = vreinterpretq_s16_u16(vsubl_u8(farb, nearb));
++ int16x8_t nears = vreinterpretq_s16_u16(vshll_n_u8(nearb, 2));
++ int16x8_t curr = vaddq_s16(nears, diff); // current row
++
++ // horizontal filter works the same based on shifted vers of current
++ // row. "prev" is current row shifted right by 1 pixel; we need to
++ // insert the previous pixel value (from t1).
++ // "next" is current row shifted left by 1 pixel, with first pixel
++ // of next block of 8 pixels added in.
++ int16x8_t prv0 = vextq_s16(curr, curr, 7);
++ int16x8_t nxt0 = vextq_s16(curr, curr, 1);
++ int16x8_t prev = vsetq_lane_s16(t1, prv0, 0);
++ int16x8_t next = vsetq_lane_s16(3*in_near[i+8] + in_far[i+8], nxt0, 7);
++
++ // horizontal filter, polyphase implementation since it's convenient:
++ // even pixels = 3*cur + prev = cur*4 + (prev - cur)
++ // odd pixels = 3*cur + next = cur*4 + (next - cur)
++ // note the shared term.
++ int16x8_t curs = vshlq_n_s16(curr, 2);
++ int16x8_t prvd = vsubq_s16(prev, curr);
++ int16x8_t nxtd = vsubq_s16(next, curr);
++ int16x8_t even = vaddq_s16(curs, prvd);
++ int16x8_t odd = vaddq_s16(curs, nxtd);
++
++ // undo scaling and round, then store with even/odd phases interleaved
++ uint8x8x2_t o;
++ o.val[0] = vqrshrun_n_s16(even, 4);
++ o.val[1] = vqrshrun_n_s16(odd, 4);
++ vst2_u8(out + i*2, o);
++#endif
++
++ // "previous" value for next iter
++ t1 = 3*in_near[i+7] + in_far[i+7];
++ }
++
++ t0 = t1;
++ t1 = 3*in_near[i] + in_far[i];
++ out[i*2] = stbi__div16(3*t1 + t0 + 8);
++
++ for (++i; i < w; ++i) {
++ t0 = t1;
++ t1 = 3*in_near[i]+in_far[i];
++ out[i*2-1] = stbi__div16(3*t0 + t1 + 8);
++ out[i*2 ] = stbi__div16(3*t1 + t0 + 8);
++ }
++ out[w*2-1] = stbi__div4(t1+2);
++
++ STBI_NOTUSED(hs);
++
++ return out;
++}
++#endif
++
++static stbi_uc *stbi__resample_row_generic(stbi_uc *out, stbi_uc *in_near, stbi_uc *in_far, int w, int hs)
++{
++ // resample with nearest-neighbor
++ int i,j;
++ STBI_NOTUSED(in_far);
++ for (i=0; i < w; ++i)
++ for (j=0; j < hs; ++j)
++ out[i*hs+j] = in_near[i];
++ return out;
++}
++
++// this is a reduced-precision calculation of YCbCr-to-RGB introduced
++// to make sure the code produces the same results in both SIMD and scalar
++#define stbi__float2fixed(x) (((int) ((x) * 4096.0f + 0.5f)) << 8)
++static void stbi__YCbCr_to_RGB_row(stbi_uc *out, const stbi_uc *y, const stbi_uc *pcb, const stbi_uc *pcr, int count, int step)
++{
++ int i;
++ for (i=0; i < count; ++i) {
++ int y_fixed = (y[i] << 20) + (1<<19); // rounding
++ int r,g,b;
++ int cr = pcr[i] - 128;
++ int cb = pcb[i] - 128;
++ r = y_fixed + cr* stbi__float2fixed(1.40200f);
++ g = y_fixed + (cr*-stbi__float2fixed(0.71414f)) + ((cb*-stbi__float2fixed(0.34414f)) & 0xffff0000);
++ b = y_fixed + cb* stbi__float2fixed(1.77200f);
++ r >>= 20;
++ g >>= 20;
++ b >>= 20;
++ if ((unsigned) r > 255) { if (r < 0) r = 0; else r = 255; }
++ if ((unsigned) g > 255) { if (g < 0) g = 0; else g = 255; }
++ if ((unsigned) b > 255) { if (b < 0) b = 0; else b = 255; }
++ out[0] = (stbi_uc)r;
++ out[1] = (stbi_uc)g;
++ out[2] = (stbi_uc)b;
++ out[3] = 255;
++ out += step;
++ }
++}
++
++#if defined(STBI_SSE2) || defined(STBI_NEON)
++static void stbi__YCbCr_to_RGB_simd(stbi_uc *out, stbi_uc const *y, stbi_uc const *pcb, stbi_uc const *pcr, int count, int step)
++{
++ int i = 0;
++
++#ifdef STBI_SSE2
++ // step == 3 is pretty ugly on the final interleave, and i'm not convinced
++ // it's useful in practice (you wouldn't use it for textures, for example).
++ // so just accelerate step == 4 case.
++ if (step == 4) {
++ // this is a fairly straightforward implementation and not super-optimized.
++ __m128i signflip = _mm_set1_epi8(-0x80);
++ __m128i cr_const0 = _mm_set1_epi16( (short) ( 1.40200f*4096.0f+0.5f));
++ __m128i cr_const1 = _mm_set1_epi16( - (short) ( 0.71414f*4096.0f+0.5f));
++ __m128i cb_const0 = _mm_set1_epi16( - (short) ( 0.34414f*4096.0f+0.5f));
++ __m128i cb_const1 = _mm_set1_epi16( (short) ( 1.77200f*4096.0f+0.5f));
++ __m128i y_bias = _mm_set1_epi8((char) (unsigned char) 128);
++ __m128i xw = _mm_set1_epi16(255); // alpha channel
++
++ for (; i+7 < count; i += 8) {
++ // load
++ __m128i y_bytes = _mm_loadl_epi64((__m128i *) (y+i));
++ __m128i cr_bytes = _mm_loadl_epi64((__m128i *) (pcr+i));
++ __m128i cb_bytes = _mm_loadl_epi64((__m128i *) (pcb+i));
++ __m128i cr_biased = _mm_xor_si128(cr_bytes, signflip); // -128
++ __m128i cb_biased = _mm_xor_si128(cb_bytes, signflip); // -128
++
++ // unpack to short (and left-shift cr, cb by 8)
++ __m128i yw = _mm_unpacklo_epi8(y_bias, y_bytes);
++ __m128i crw = _mm_unpacklo_epi8(_mm_setzero_si128(), cr_biased);
++ __m128i cbw = _mm_unpacklo_epi8(_mm_setzero_si128(), cb_biased);
++
++ // color transform
++ __m128i yws = _mm_srli_epi16(yw, 4);
++ __m128i cr0 = _mm_mulhi_epi16(cr_const0, crw);
++ __m128i cb0 = _mm_mulhi_epi16(cb_const0, cbw);
++ __m128i cb1 = _mm_mulhi_epi16(cbw, cb_const1);
++ __m128i cr1 = _mm_mulhi_epi16(crw, cr_const1);
++ __m128i rws = _mm_add_epi16(cr0, yws);
++ __m128i gwt = _mm_add_epi16(cb0, yws);
++ __m128i bws = _mm_add_epi16(yws, cb1);
++ __m128i gws = _mm_add_epi16(gwt, cr1);
++
++ // descale
++ __m128i rw = _mm_srai_epi16(rws, 4);
++ __m128i bw = _mm_srai_epi16(bws, 4);
++ __m128i gw = _mm_srai_epi16(gws, 4);
++
++ // back to byte, set up for transpose
++ __m128i brb = _mm_packus_epi16(rw, bw);
++ __m128i gxb = _mm_packus_epi16(gw, xw);
++
++ // transpose to interleave channels
++ __m128i t0 = _mm_unpacklo_epi8(brb, gxb);
++ __m128i t1 = _mm_unpackhi_epi8(brb, gxb);
++ __m128i o0 = _mm_unpacklo_epi16(t0, t1);
++ __m128i o1 = _mm_unpackhi_epi16(t0, t1);
++
++ // store
++ _mm_storeu_si128((__m128i *) (out + 0), o0);
++ _mm_storeu_si128((__m128i *) (out + 16), o1);
++ out += 32;
++ }
++ }
++#endif
++
++#ifdef STBI_NEON
++ // in this version, step=3 support would be easy to add. but is there demand?
++ if (step == 4) {
++ // this is a fairly straightforward implementation and not super-optimized.
++ uint8x8_t signflip = vdup_n_u8(0x80);
++ int16x8_t cr_const0 = vdupq_n_s16( (short) ( 1.40200f*4096.0f+0.5f));
++ int16x8_t cr_const1 = vdupq_n_s16( - (short) ( 0.71414f*4096.0f+0.5f));
++ int16x8_t cb_const0 = vdupq_n_s16( - (short) ( 0.34414f*4096.0f+0.5f));
++ int16x8_t cb_const1 = vdupq_n_s16( (short) ( 1.77200f*4096.0f+0.5f));
++
++ for (; i+7 < count; i += 8) {
++ // load
++ uint8x8_t y_bytes = vld1_u8(y + i);
++ uint8x8_t cr_bytes = vld1_u8(pcr + i);
++ uint8x8_t cb_bytes = vld1_u8(pcb + i);
++ int8x8_t cr_biased = vreinterpret_s8_u8(vsub_u8(cr_bytes, signflip));
++ int8x8_t cb_biased = vreinterpret_s8_u8(vsub_u8(cb_bytes, signflip));
++
++ // expand to s16
++ int16x8_t yws = vreinterpretq_s16_u16(vshll_n_u8(y_bytes, 4));
++ int16x8_t crw = vshll_n_s8(cr_biased, 7);
++ int16x8_t cbw = vshll_n_s8(cb_biased, 7);
++
++ // color transform
++ int16x8_t cr0 = vqdmulhq_s16(crw, cr_const0);
++ int16x8_t cb0 = vqdmulhq_s16(cbw, cb_const0);
++ int16x8_t cr1 = vqdmulhq_s16(crw, cr_const1);
++ int16x8_t cb1 = vqdmulhq_s16(cbw, cb_const1);
++ int16x8_t rws = vaddq_s16(yws, cr0);
++ int16x8_t gws = vaddq_s16(vaddq_s16(yws, cb0), cr1);
++ int16x8_t bws = vaddq_s16(yws, cb1);
++
++ // undo scaling, round, convert to byte
++ uint8x8x4_t o;
++ o.val[0] = vqrshrun_n_s16(rws, 4);
++ o.val[1] = vqrshrun_n_s16(gws, 4);
++ o.val[2] = vqrshrun_n_s16(bws, 4);
++ o.val[3] = vdup_n_u8(255);
++
++ // store, interleaving r/g/b/a
++ vst4_u8(out, o);
++ out += 8*4;
++ }
++ }
++#endif
++
++ for (; i < count; ++i) {
++ int y_fixed = (y[i] << 20) + (1<<19); // rounding
++ int r,g,b;
++ int cr = pcr[i] - 128;
++ int cb = pcb[i] - 128;
++ r = y_fixed + cr* stbi__float2fixed(1.40200f);
++ g = y_fixed + cr*-stbi__float2fixed(0.71414f) + ((cb*-stbi__float2fixed(0.34414f)) & 0xffff0000);
++ b = y_fixed + cb* stbi__float2fixed(1.77200f);
++ r >>= 20;
++ g >>= 20;
++ b >>= 20;
++ if ((unsigned) r > 255) { if (r < 0) r = 0; else r = 255; }
++ if ((unsigned) g > 255) { if (g < 0) g = 0; else g = 255; }
++ if ((unsigned) b > 255) { if (b < 0) b = 0; else b = 255; }
++ out[0] = (stbi_uc)r;
++ out[1] = (stbi_uc)g;
++ out[2] = (stbi_uc)b;
++ out[3] = 255;
++ out += step;
++ }
++}
++#endif
++
++// set up the kernels
++static void stbi__setup_jpeg(stbi__jpeg *j)
++{
++ j->idct_block_kernel = stbi__idct_block;
++ j->YCbCr_to_RGB_kernel = stbi__YCbCr_to_RGB_row;
++ j->resample_row_hv_2_kernel = stbi__resample_row_hv_2;
++
++#ifdef STBI_SSE2
++ if (stbi__sse2_available()) {
++ j->idct_block_kernel = stbi__idct_simd;
++ j->YCbCr_to_RGB_kernel = stbi__YCbCr_to_RGB_simd;
++ j->resample_row_hv_2_kernel = stbi__resample_row_hv_2_simd;
++ }
++#endif
++
++#ifdef STBI_NEON
++ j->idct_block_kernel = stbi__idct_simd;
++ j->YCbCr_to_RGB_kernel = stbi__YCbCr_to_RGB_simd;
++ j->resample_row_hv_2_kernel = stbi__resample_row_hv_2_simd;
++#endif
++}
++
++// clean up the temporary component buffers
++static void stbi__cleanup_jpeg(stbi__jpeg *j)
++{
++ stbi__free_jpeg_components(j, j->s->img_n, 0);
++}
++
++typedef struct
++{
++ resample_row_func resample;
++ stbi_uc *line0,*line1;
++ int hs,vs; // expansion factor in each axis
++ int w_lores; // horizontal pixels pre-expansion
++ int ystep; // how far through vertical expansion we are
++ int ypos; // which pre-expansion row we're on
++} stbi__resample;
++
++// fast 0..255 * 0..255 => 0..255 rounded multiplication
++static stbi_uc stbi__blinn_8x8(stbi_uc x, stbi_uc y)
++{
++ unsigned int t = x*y + 128;
++ return (stbi_uc) ((t + (t >>8)) >> 8);
++}
++
++static stbi_uc *load_jpeg_image(stbi__jpeg *z, int *out_x, int *out_y, int *comp, int req_comp)
++{
++ int n, decode_n, is_rgb;
++ z->s->img_n = 0; // make stbi__cleanup_jpeg safe
++
++ // validate req_comp
++ if (req_comp < 0 || req_comp > 4) return stbi__errpuc("bad req_comp", "Internal error");
++
++ // load a jpeg image from whichever source, but leave in YCbCr format
++ if (!stbi__decode_jpeg_image(z)) { stbi__cleanup_jpeg(z); return NULL; }
++
++ // determine actual number of components to generate
++ n = req_comp ? req_comp : z->s->img_n >= 3 ? 3 : 1;
++
++ is_rgb = z->s->img_n == 3 && (z->rgb == 3 || (z->app14_color_transform == 0 && !z->jfif));
++
++ if (z->s->img_n == 3 && n < 3 && !is_rgb)
++ decode_n = 1;
++ else
++ decode_n = z->s->img_n;
++
++ // resample and color-convert
++ {
++ int k;
++ unsigned int i,j;
++ stbi_uc *output;
++ stbi_uc *coutput[4] = { NULL, NULL, NULL, NULL };
++
++ stbi__resample res_comp[4];
++
++ for (k=0; k < decode_n; ++k) {
++ stbi__resample *r = &res_comp[k];
++
++ // allocate line buffer big enough for upsampling off the edges
++ // with upsample factor of 4
++ z->img_comp[k].linebuf = (stbi_uc *) stbi__malloc(z->s->img_x + 3);
++ if (!z->img_comp[k].linebuf) { stbi__cleanup_jpeg(z); return stbi__errpuc("outofmem", "Out of memory"); }
++
++ r->hs = z->img_h_max / z->img_comp[k].h;
++ r->vs = z->img_v_max / z->img_comp[k].v;
++ r->ystep = r->vs >> 1;
++ r->w_lores = (z->s->img_x + r->hs-1) / r->hs;
++ r->ypos = 0;
++ r->line0 = r->line1 = z->img_comp[k].data;
++
++ if (r->hs == 1 && r->vs == 1) r->resample = resample_row_1;
++ else if (r->hs == 1 && r->vs == 2) r->resample = stbi__resample_row_v_2;
++ else if (r->hs == 2 && r->vs == 1) r->resample = stbi__resample_row_h_2;
++ else if (r->hs == 2 && r->vs == 2) r->resample = z->resample_row_hv_2_kernel;
++ else r->resample = stbi__resample_row_generic;
++ }
++
++ // can't error after this so, this is safe
++ output = (stbi_uc *) stbi__malloc_mad3(n, z->s->img_x, z->s->img_y, 1);
++ if (!output) { stbi__cleanup_jpeg(z); return stbi__errpuc("outofmem", "Out of memory"); }
++
++ // now go ahead and resample
++ for (j=0; j < z->s->img_y; ++j) {
++ stbi_uc *out = output + n * z->s->img_x * j;
++ for (k=0; k < decode_n; ++k) {
++ stbi__resample *r = &res_comp[k];
++ int y_bot = r->ystep >= (r->vs >> 1);
++ coutput[k] = r->resample(z->img_comp[k].linebuf,
++ y_bot ? r->line1 : r->line0,
++ y_bot ? r->line0 : r->line1,
++ r->w_lores, r->hs);
++ if (++r->ystep >= r->vs) {
++ r->ystep = 0;
++ r->line0 = r->line1;
++ if (++r->ypos < z->img_comp[k].y)
++ r->line1 += z->img_comp[k].w2;
++ }
++ }
++ if (n >= 3) {
++ stbi_uc *y = coutput[0];
++ if (z->s->img_n == 3) {
++ if (is_rgb) {
++ for (i=0; i < z->s->img_x; ++i) {
++ out[0] = y[i];
++ out[1] = coutput[1][i];
++ out[2] = coutput[2][i];
++ out[3] = 255;
++ out += n;
++ }
++ } else {
++ z->YCbCr_to_RGB_kernel(out, y, coutput[1], coutput[2], z->s->img_x, n);
++ }
++ } else if (z->s->img_n == 4) {
++ if (z->app14_color_transform == 0) { // CMYK
++ for (i=0; i < z->s->img_x; ++i) {
++ stbi_uc m = coutput[3][i];
++ out[0] = stbi__blinn_8x8(coutput[0][i], m);
++ out[1] = stbi__blinn_8x8(coutput[1][i], m);
++ out[2] = stbi__blinn_8x8(coutput[2][i], m);
++ out[3] = 255;
++ out += n;
++ }
++ } else if (z->app14_color_transform == 2) { // YCCK
++ z->YCbCr_to_RGB_kernel(out, y, coutput[1], coutput[2], z->s->img_x, n);
++ for (i=0; i < z->s->img_x; ++i) {
++ stbi_uc m = coutput[3][i];
++ out[0] = stbi__blinn_8x8(255 - out[0], m);
++ out[1] = stbi__blinn_8x8(255 - out[1], m);
++ out[2] = stbi__blinn_8x8(255 - out[2], m);
++ out += n;
++ }
++ } else { // YCbCr + alpha? Ignore the fourth channel for now
++ z->YCbCr_to_RGB_kernel(out, y, coutput[1], coutput[2], z->s->img_x, n);
++ }
++ } else
++ for (i=0; i < z->s->img_x; ++i) {
++ out[0] = out[1] = out[2] = y[i];
++ out[3] = 255; // not used if n==3
++ out += n;
++ }
++ } else {
++ if (is_rgb) {
++ if (n == 1)
++ for (i=0; i < z->s->img_x; ++i)
++ *out++ = stbi__compute_y(coutput[0][i], coutput[1][i], coutput[2][i]);
++ else {
++ for (i=0; i < z->s->img_x; ++i, out += 2) {
++ out[0] = stbi__compute_y(coutput[0][i], coutput[1][i], coutput[2][i]);
++ out[1] = 255;
++ }
++ }
++ } else if (z->s->img_n == 4 && z->app14_color_transform == 0) {
++ for (i=0; i < z->s->img_x; ++i) {
++ stbi_uc m = coutput[3][i];
++ stbi_uc r = stbi__blinn_8x8(coutput[0][i], m);
++ stbi_uc g = stbi__blinn_8x8(coutput[1][i], m);
++ stbi_uc b = stbi__blinn_8x8(coutput[2][i], m);
++ out[0] = stbi__compute_y(r, g, b);
++ out[1] = 255;
++ out += n;
++ }
++ } else if (z->s->img_n == 4 && z->app14_color_transform == 2) {
++ for (i=0; i < z->s->img_x; ++i) {
++ out[0] = stbi__blinn_8x8(255 - coutput[0][i], coutput[3][i]);
++ out[1] = 255;
++ out += n;
++ }
++ } else {
++ stbi_uc *y = coutput[0];
++ if (n == 1)
++ for (i=0; i < z->s->img_x; ++i) out[i] = y[i];
++ else
++ for (i=0; i < z->s->img_x; ++i) { *out++ = y[i]; *out++ = 255; }
++ }
++ }
++ }
++ stbi__cleanup_jpeg(z);
++ *out_x = z->s->img_x;
++ *out_y = z->s->img_y;
++ if (comp) *comp = z->s->img_n >= 3 ? 3 : 1; // report original components, not output
++ return output;
++ }
++}
++
++static void *stbi__jpeg_load(stbi__context *s, int *x, int *y, int *comp, int req_comp, stbi__result_info *ri)
++{
++ unsigned char* result;
++ stbi__jpeg* j = (stbi__jpeg*) stbi__malloc(sizeof(stbi__jpeg));
++ STBI_NOTUSED(ri);
++ j->s = s;
++ stbi__setup_jpeg(j);
++ result = load_jpeg_image(j, x,y,comp,req_comp);
++ STBI_FREE(j);
++ return result;
++}
++
++static int stbi__jpeg_test(stbi__context *s)
++{
++ int r;
++ stbi__jpeg* j = (stbi__jpeg*)stbi__malloc(sizeof(stbi__jpeg));
++ j->s = s;
++ stbi__setup_jpeg(j);
++ r = stbi__decode_jpeg_header(j, STBI__SCAN_type);
++ stbi__rewind(s);
++ STBI_FREE(j);
++ return r;
++}
++
++static int stbi__jpeg_info_raw(stbi__jpeg *j, int *x, int *y, int *comp)
++{
++ if (!stbi__decode_jpeg_header(j, STBI__SCAN_header)) {
++ stbi__rewind( j->s );
++ return 0;
++ }
++ if (x) *x = j->s->img_x;
++ if (y) *y = j->s->img_y;
++ if (comp) *comp = j->s->img_n >= 3 ? 3 : 1;
++ return 1;
++}
++
++static int stbi__jpeg_info(stbi__context *s, int *x, int *y, int *comp)
++{
++ int result;
++ stbi__jpeg* j = (stbi__jpeg*) (stbi__malloc(sizeof(stbi__jpeg)));
++ j->s = s;
++ result = stbi__jpeg_info_raw(j, x, y, comp);
++ STBI_FREE(j);
++ return result;
++}
++#endif
++
++// public domain zlib decode v0.2 Sean Barrett 2006-11-18
++// simple implementation
++// - all input must be provided in an upfront buffer
++// - all output is written to a single output buffer (can malloc/realloc)
++// performance
++// - fast huffman
++
++#ifndef STBI_NO_ZLIB
++
++// fast-way is faster to check than jpeg huffman, but slow way is slower
++#define STBI__ZFAST_BITS 9 // accelerate all cases in default tables
++#define STBI__ZFAST_MASK ((1 << STBI__ZFAST_BITS) - 1)
++
++// zlib-style huffman encoding
++// (jpegs packs from left, zlib from right, so can't share code)
++typedef struct
++{
++ stbi__uint16 fast[1 << STBI__ZFAST_BITS];
++ stbi__uint16 firstcode[16];
++ int maxcode[17];
++ stbi__uint16 firstsymbol[16];
++ stbi_uc size[288];
++ stbi__uint16 value[288];
++} stbi__zhuffman;
++
++stbi_inline static int stbi__bitreverse16(int n)
++{
++ n = ((n & 0xAAAA) >> 1) | ((n & 0x5555) << 1);
++ n = ((n & 0xCCCC) >> 2) | ((n & 0x3333) << 2);
++ n = ((n & 0xF0F0) >> 4) | ((n & 0x0F0F) << 4);
++ n = ((n & 0xFF00) >> 8) | ((n & 0x00FF) << 8);
++ return n;
++}
++
++stbi_inline static int stbi__bit_reverse(int v, int bits)
++{
++ STBI_ASSERT(bits <= 16);
++ // to bit reverse n bits, reverse 16 and shift
++ // e.g. 11 bits, bit reverse and shift away 5
++ return stbi__bitreverse16(v) >> (16-bits);
++}
++
++static int stbi__zbuild_huffman(stbi__zhuffman *z, const stbi_uc *sizelist, int num)
++{
++ int i,k=0;
++ int code, next_code[16], sizes[17];
++
++ // DEFLATE spec for generating codes
++ memset(sizes, 0, sizeof(sizes));
++ memset(z->fast, 0, sizeof(z->fast));
++ for (i=0; i < num; ++i)
++ ++sizes[sizelist[i]];
++ sizes[0] = 0;
++ for (i=1; i < 16; ++i)
++ if (sizes[i] > (1 << i))
++ return stbi__err("bad sizes", "Corrupt PNG");
++ code = 0;
++ for (i=1; i < 16; ++i) {
++ next_code[i] = code;
++ z->firstcode[i] = (stbi__uint16) code;
++ z->firstsymbol[i] = (stbi__uint16) k;
++ code = (code + sizes[i]);
++ if (sizes[i])
++ if (code-1 >= (1 << i)) return stbi__err("bad codelengths","Corrupt PNG");
++ z->maxcode[i] = code << (16-i); // preshift for inner loop
++ code <<= 1;
++ k += sizes[i];
++ }
++ z->maxcode[16] = 0x10000; // sentinel
++ for (i=0; i < num; ++i) {
++ int s = sizelist[i];
++ if (s) {
++ int c = next_code[s] - z->firstcode[s] + z->firstsymbol[s];
++ stbi__uint16 fastv = (stbi__uint16) ((s << 9) | i);
++ z->size [c] = (stbi_uc ) s;
++ z->value[c] = (stbi__uint16) i;
++ if (s <= STBI__ZFAST_BITS) {
++ int j = stbi__bit_reverse(next_code[s],s);
++ while (j < (1 << STBI__ZFAST_BITS)) {
++ z->fast[j] = fastv;
++ j += (1 << s);
++ }
++ }
++ ++next_code[s];
++ }
++ }
++ return 1;
++}
++
++// zlib-from-memory implementation for PNG reading
++// because PNG allows splitting the zlib stream arbitrarily,
++// and it's annoying structurally to have PNG call ZLIB call PNG,
++// we require PNG read all the IDATs and combine them into a single
++// memory buffer
++
++typedef struct
++{
++ stbi_uc *zbuffer, *zbuffer_end;
++ int num_bits;
++ stbi__uint32 code_buffer;
++
++ char *zout;
++ char *zout_start;
++ char *zout_end;
++ int z_expandable;
++
++ stbi__zhuffman z_length, z_distance;
++} stbi__zbuf;
++
++stbi_inline static stbi_uc stbi__zget8(stbi__zbuf *z)
++{
++ if (z->zbuffer >= z->zbuffer_end) return 0;
++ return *z->zbuffer++;
++}
++
++static void stbi__fill_bits(stbi__zbuf *z)
++{
++ do {
++ STBI_ASSERT(z->code_buffer < (1U << z->num_bits));
++ z->code_buffer |= (unsigned int) stbi__zget8(z) << z->num_bits;
++ z->num_bits += 8;
++ } while (z->num_bits <= 24);
++}
++
++stbi_inline static unsigned int stbi__zreceive(stbi__zbuf *z, int n)
++{
++ unsigned int k;
++ if (z->num_bits < n) stbi__fill_bits(z);
++ k = z->code_buffer & ((1 << n) - 1);
++ z->code_buffer >>= n;
++ z->num_bits -= n;
++ return k;
++}
++
++static int stbi__zhuffman_decode_slowpath(stbi__zbuf *a, stbi__zhuffman *z)
++{
++ int b,s,k;
++ // not resolved by fast table, so compute it the slow way
++ // use jpeg approach, which requires MSbits at top
++ k = stbi__bit_reverse(a->code_buffer, 16);
++ for (s=STBI__ZFAST_BITS+1; ; ++s)
++ if (k < z->maxcode[s])
++ break;
++ if (s == 16) return -1; // invalid code!
++ // code size is s, so:
++ b = (k >> (16-s)) - z->firstcode[s] + z->firstsymbol[s];
++ STBI_ASSERT(z->size[b] == s);
++ a->code_buffer >>= s;
++ a->num_bits -= s;
++ return z->value[b];
++}
++
++stbi_inline static int stbi__zhuffman_decode(stbi__zbuf *a, stbi__zhuffman *z)
++{
++ int b,s;
++ if (a->num_bits < 16) stbi__fill_bits(a);
++ b = z->fast[a->code_buffer & STBI__ZFAST_MASK];
++ if (b) {
++ s = b >> 9;
++ a->code_buffer >>= s;
++ a->num_bits -= s;
++ return b & 511;
++ }
++ return stbi__zhuffman_decode_slowpath(a, z);
++}
++
++static int stbi__zexpand(stbi__zbuf *z, char *zout, int n) // need to make room for n bytes
++{
++ char *q;
++ int cur, limit, old_limit;
++ z->zout = zout;
++ if (!z->z_expandable) return stbi__err("output buffer limit","Corrupt PNG");
++ cur = (int) (z->zout - z->zout_start);
++ limit = old_limit = (int) (z->zout_end - z->zout_start);
++ while (cur + n > limit)
++ limit *= 2;
++ q = (char *) STBI_REALLOC_SIZED(z->zout_start, old_limit, limit);
++ STBI_NOTUSED(old_limit);
++ if (q == NULL) return stbi__err("outofmem", "Out of memory");
++ z->zout_start = q;
++ z->zout = q + cur;
++ z->zout_end = q + limit;
++ return 1;
++}
++
++static const int stbi__zlength_base[31] = {
++ 3,4,5,6,7,8,9,10,11,13,
++ 15,17,19,23,27,31,35,43,51,59,
++ 67,83,99,115,131,163,195,227,258,0,0 };
++
++static const int stbi__zlength_extra[31]=
++{ 0,0,0,0,0,0,0,0,1,1,1,1,2,2,2,2,3,3,3,3,4,4,4,4,5,5,5,5,0,0,0 };
++
++static const int stbi__zdist_base[32] = { 1,2,3,4,5,7,9,13,17,25,33,49,65,97,129,193,
++257,385,513,769,1025,1537,2049,3073,4097,6145,8193,12289,16385,24577,0,0};
++
++static const int stbi__zdist_extra[32] =
++{ 0,0,0,0,1,1,2,2,3,3,4,4,5,5,6,6,7,7,8,8,9,9,10,10,11,11,12,12,13,13};
++
++static int stbi__parse_huffman_block(stbi__zbuf *a)
++{
++ char *zout = a->zout;
++ for(;;) {
++ int z = stbi__zhuffman_decode(a, &a->z_length);
++ if (z < 256) {
++ if (z < 0) return stbi__err("bad huffman code","Corrupt PNG"); // error in huffman codes
++ if (zout >= a->zout_end) {
++ if (!stbi__zexpand(a, zout, 1)) return 0;
++ zout = a->zout;
++ }
++ *zout++ = (char) z;
++ } else {
++ stbi_uc *p;
++ int len,dist;
++ if (z == 256) {
++ a->zout = zout;
++ return 1;
++ }
++ z -= 257;
++ len = stbi__zlength_base[z];
++ if (stbi__zlength_extra[z]) len += stbi__zreceive(a, stbi__zlength_extra[z]);
++ z = stbi__zhuffman_decode(a, &a->z_distance);
++ if (z < 0) return stbi__err("bad huffman code","Corrupt PNG");
++ dist = stbi__zdist_base[z];
++ if (stbi__zdist_extra[z]) dist += stbi__zreceive(a, stbi__zdist_extra[z]);
++ if (zout - a->zout_start < dist) return stbi__err("bad dist","Corrupt PNG");
++ if (zout + len > a->zout_end) {
++ if (!stbi__zexpand(a, zout, len)) return 0;
++ zout = a->zout;
++ }
++ p = (stbi_uc *) (zout - dist);
++ if (dist == 1) { // run of one byte; common in images.
++ stbi_uc v = *p;
++ if (len) { do *zout++ = v; while (--len); }
++ } else {
++ if (len) { do *zout++ = *p++; while (--len); }
++ }
++ }
++ }
++}
++
++static int stbi__compute_huffman_codes(stbi__zbuf *a)
++{
++ static const stbi_uc length_dezigzag[19] = { 16,17,18,0,8,7,9,6,10,5,11,4,12,3,13,2,14,1,15 };
++ stbi__zhuffman z_codelength;
++ stbi_uc lencodes[286+32+137];//padding for maximum single op
++ stbi_uc codelength_sizes[19];
++ int i,n;
++
++ int hlit = stbi__zreceive(a,5) + 257;
++ int hdist = stbi__zreceive(a,5) + 1;
++ int hclen = stbi__zreceive(a,4) + 4;
++ int ntot = hlit + hdist;
++
++ memset(codelength_sizes, 0, sizeof(codelength_sizes));
++ for (i=0; i < hclen; ++i) {
++ int s = stbi__zreceive(a,3);
++ codelength_sizes[length_dezigzag[i]] = (stbi_uc) s;
++ }
++ if (!stbi__zbuild_huffman(&z_codelength, codelength_sizes, 19)) return 0;
++
++ n = 0;
++ while (n < ntot) {
++ int c = stbi__zhuffman_decode(a, &z_codelength);
++ if (c < 0 || c >= 19) return stbi__err("bad codelengths", "Corrupt PNG");
++ if (c < 16)
++ lencodes[n++] = (stbi_uc) c;
++ else {
++ stbi_uc fill = 0;
++ if (c == 16) {
++ c = stbi__zreceive(a,2)+3;
++ if (n == 0) return stbi__err("bad codelengths", "Corrupt PNG");
++ fill = lencodes[n-1];
++ } else if (c == 17)
++ c = stbi__zreceive(a,3)+3;
++ else {
++ STBI_ASSERT(c == 18);
++ c = stbi__zreceive(a,7)+11;
++ }
++ if (ntot - n < c) return stbi__err("bad codelengths", "Corrupt PNG");
++ memset(lencodes+n, fill, c);
++ n += c;
++ }
++ }
++ if (n != ntot) return stbi__err("bad codelengths","Corrupt PNG");
++ if (!stbi__zbuild_huffman(&a->z_length, lencodes, hlit)) return 0;
++ if (!stbi__zbuild_huffman(&a->z_distance, lencodes+hlit, hdist)) return 0;
++ return 1;
++}
++
++static int stbi__parse_uncompressed_block(stbi__zbuf *a)
++{
++ stbi_uc header[4];
++ int len,nlen,k;
++ if (a->num_bits & 7)
++ stbi__zreceive(a, a->num_bits & 7); // discard
++ // drain the bit-packed data into header
++ k = 0;
++ while (a->num_bits > 0) {
++ header[k++] = (stbi_uc) (a->code_buffer & 255); // suppress MSVC run-time check
++ a->code_buffer >>= 8;
++ a->num_bits -= 8;
++ }
++ STBI_ASSERT(a->num_bits == 0);
++ // now fill header the normal way
++ while (k < 4)
++ header[k++] = stbi__zget8(a);
++ len = header[1] * 256 + header[0];
++ nlen = header[3] * 256 + header[2];
++ if (nlen != (len ^ 0xffff)) return stbi__err("zlib corrupt","Corrupt PNG");
++ if (a->zbuffer + len > a->zbuffer_end) return stbi__err("read past buffer","Corrupt PNG");
++ if (a->zout + len > a->zout_end)
++ if (!stbi__zexpand(a, a->zout, len)) return 0;
++ memcpy(a->zout, a->zbuffer, len);
++ a->zbuffer += len;
++ a->zout += len;
++ return 1;
++}
++
++static int stbi__parse_zlib_header(stbi__zbuf *a)
++{
++ int cmf = stbi__zget8(a);
++ int cm = cmf & 15;
++ /* int cinfo = cmf >> 4; */
++ int flg = stbi__zget8(a);
++ if ((cmf*256+flg) % 31 != 0) return stbi__err("bad zlib header","Corrupt PNG"); // zlib spec
++ if (flg & 32) return stbi__err("no preset dict","Corrupt PNG"); // preset dictionary not allowed in png
++ if (cm != 8) return stbi__err("bad compression","Corrupt PNG"); // DEFLATE required for png
++ // window = 1 << (8 + cinfo)... but who cares, we fully buffer output
++ return 1;
++}
++
++static const stbi_uc stbi__zdefault_length[288] =
++{
++ 8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8, 8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,
++ 8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8, 8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,
++ 8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8, 8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,
++ 8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8, 8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,
++ 8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8, 9,9,9,9,9,9,9,9,9,9,9,9,9,9,9,9,
++ 9,9,9,9,9,9,9,9,9,9,9,9,9,9,9,9, 9,9,9,9,9,9,9,9,9,9,9,9,9,9,9,9,
++ 9,9,9,9,9,9,9,9,9,9,9,9,9,9,9,9, 9,9,9,9,9,9,9,9,9,9,9,9,9,9,9,9,
++ 9,9,9,9,9,9,9,9,9,9,9,9,9,9,9,9, 9,9,9,9,9,9,9,9,9,9,9,9,9,9,9,9,
++ 7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7, 7,7,7,7,7,7,7,7,8,8,8,8,8,8,8,8
++};
++static const stbi_uc stbi__zdefault_distance[32] =
++{
++ 5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5
++};
++/*
++Init algorithm:
++{
++ int i; // use <= to match clearly with spec
++ for (i=0; i <= 143; ++i) stbi__zdefault_length[i] = 8;
++ for ( ; i <= 255; ++i) stbi__zdefault_length[i] = 9;
++ for ( ; i <= 279; ++i) stbi__zdefault_length[i] = 7;
++ for ( ; i <= 287; ++i) stbi__zdefault_length[i] = 8;
++
++ for (i=0; i <= 31; ++i) stbi__zdefault_distance[i] = 5;
++}
++*/
++
++static int stbi__parse_zlib(stbi__zbuf *a, int parse_header)
++{
++ int final, type;
++ if (parse_header)
++ if (!stbi__parse_zlib_header(a)) return 0;
++ a->num_bits = 0;
++ a->code_buffer = 0;
++ do {
++ final = stbi__zreceive(a,1);
++ type = stbi__zreceive(a,2);
++ if (type == 0) {
++ if (!stbi__parse_uncompressed_block(a)) return 0;
++ } else if (type == 3) {
++ return 0;
++ } else {
++ if (type == 1) {
++ // use fixed code lengths
++ if (!stbi__zbuild_huffman(&a->z_length , stbi__zdefault_length , 288)) return 0;
++ if (!stbi__zbuild_huffman(&a->z_distance, stbi__zdefault_distance, 32)) return 0;
++ } else {
++ if (!stbi__compute_huffman_codes(a)) return 0;
++ }
++ if (!stbi__parse_huffman_block(a)) return 0;
++ }
++ } while (!final);
++ return 1;
++}
++
++static int stbi__do_zlib(stbi__zbuf *a, char *obuf, int olen, int exp, int parse_header)
++{
++ a->zout_start = obuf;
++ a->zout = obuf;
++ a->zout_end = obuf + olen;
++ a->z_expandable = exp;
++
++ return stbi__parse_zlib(a, parse_header);
++}
++
++STBIDEF char *stbi_zlib_decode_malloc_guesssize(const char *buffer, int len, int initial_size, int *outlen)
++{
++ stbi__zbuf a;
++ char *p = (char *) stbi__malloc(initial_size);
++ if (p == NULL) return NULL;
++ a.zbuffer = (stbi_uc *) buffer;
++ a.zbuffer_end = (stbi_uc *) buffer + len;
++ if (stbi__do_zlib(&a, p, initial_size, 1, 1)) {
++ if (outlen) *outlen = (int) (a.zout - a.zout_start);
++ return a.zout_start;
++ } else {
++ STBI_FREE(a.zout_start);
++ return NULL;
++ }
++}
++
++STBIDEF char *stbi_zlib_decode_malloc(char const *buffer, int len, int *outlen)
++{
++ return stbi_zlib_decode_malloc_guesssize(buffer, len, 16384, outlen);
++}
++
++STBIDEF char *stbi_zlib_decode_malloc_guesssize_headerflag(const char *buffer, int len, int initial_size, int *outlen, int parse_header)
++{
++ stbi__zbuf a;
++ char *p = (char *) stbi__malloc(initial_size);
++ if (p == NULL) return NULL;
++ a.zbuffer = (stbi_uc *) buffer;
++ a.zbuffer_end = (stbi_uc *) buffer + len;
++ if (stbi__do_zlib(&a, p, initial_size, 1, parse_header)) {
++ if (outlen) *outlen = (int) (a.zout - a.zout_start);
++ return a.zout_start;
++ } else {
++ STBI_FREE(a.zout_start);
++ return NULL;
++ }
++}
++
++STBIDEF int stbi_zlib_decode_buffer(char *obuffer, int olen, char const *ibuffer, int ilen)
++{
++ stbi__zbuf a;
++ a.zbuffer = (stbi_uc *) ibuffer;
++ a.zbuffer_end = (stbi_uc *) ibuffer + ilen;
++ if (stbi__do_zlib(&a, obuffer, olen, 0, 1))
++ return (int) (a.zout - a.zout_start);
++ else
++ return -1;
++}
++
++STBIDEF char *stbi_zlib_decode_noheader_malloc(char const *buffer, int len, int *outlen)
++{
++ stbi__zbuf a;
++ char *p = (char *) stbi__malloc(16384);
++ if (p == NULL) return NULL;
++ a.zbuffer = (stbi_uc *) buffer;
++ a.zbuffer_end = (stbi_uc *) buffer+len;
++ if (stbi__do_zlib(&a, p, 16384, 1, 0)) {
++ if (outlen) *outlen = (int) (a.zout - a.zout_start);
++ return a.zout_start;
++ } else {
++ STBI_FREE(a.zout_start);
++ return NULL;
++ }
++}
++
++STBIDEF int stbi_zlib_decode_noheader_buffer(char *obuffer, int olen, const char *ibuffer, int ilen)
++{
++ stbi__zbuf a;
++ a.zbuffer = (stbi_uc *) ibuffer;
++ a.zbuffer_end = (stbi_uc *) ibuffer + ilen;
++ if (stbi__do_zlib(&a, obuffer, olen, 0, 0))
++ return (int) (a.zout - a.zout_start);
++ else
++ return -1;
++}
++#endif
++
++// public domain "baseline" PNG decoder v0.10 Sean Barrett 2006-11-18
++// simple implementation
++// - only 8-bit samples
++// - no CRC checking
++// - allocates lots of intermediate memory
++// - avoids problem of streaming data between subsystems
++// - avoids explicit window management
++// performance
++// - uses stb_zlib, a PD zlib implementation with fast huffman decoding
++
++#ifndef STBI_NO_PNG
++typedef struct
++{
++ stbi__uint32 length;
++ stbi__uint32 type;
++} stbi__pngchunk;
++
++static stbi__pngchunk stbi__get_chunk_header(stbi__context *s)
++{
++ stbi__pngchunk c;
++ c.length = stbi__get32be(s);
++ c.type = stbi__get32be(s);
++ return c;
++}
++
++static int stbi__check_png_header(stbi__context *s)
++{
++ static const stbi_uc png_sig[8] = { 137,80,78,71,13,10,26,10 };
++ int i;
++ for (i=0; i < 8; ++i)
++ if (stbi__get8(s) != png_sig[i]) return stbi__err("bad png sig","Not a PNG");
++ return 1;
++}
++
++typedef struct
++{
++ stbi__context *s;
++ stbi_uc *idata, *expanded, *out;
++ int depth;
++} stbi__png;
++
++
++enum {
++ STBI__F_none=0,
++ STBI__F_sub=1,
++ STBI__F_up=2,
++ STBI__F_avg=3,
++ STBI__F_paeth=4,
++ // synthetic filters used for first scanline to avoid needing a dummy row of 0s
++ STBI__F_avg_first,
++ STBI__F_paeth_first
++};
++
++static stbi_uc first_row_filter[5] =
++{
++ STBI__F_none,
++ STBI__F_sub,
++ STBI__F_none,
++ STBI__F_avg_first,
++ STBI__F_paeth_first
++};
++
++static int stbi__paeth(int a, int b, int c)
++{
++ int p = a + b - c;
++ int pa = abs(p-a);
++ int pb = abs(p-b);
++ int pc = abs(p-c);
++ if (pa <= pb && pa <= pc) return a;
++ if (pb <= pc) return b;
++ return c;
++}
++
++static const stbi_uc stbi__depth_scale_table[9] = { 0, 0xff, 0x55, 0, 0x11, 0,0,0, 0x01 };
++
++// create the png data from post-deflated data
++static int stbi__create_png_image_raw(stbi__png *a, stbi_uc *raw, stbi__uint32 raw_len, int out_n, stbi__uint32 x, stbi__uint32 y, int depth, int color)
++{
++ int bytes = (depth == 16? 2 : 1);
++ stbi__context *s = a->s;
++ stbi__uint32 i,j,stride = x*out_n*bytes;
++ stbi__uint32 img_len, img_width_bytes;
++ int k;
++ int img_n = s->img_n; // copy it into a local for later
++
++ int output_bytes = out_n*bytes;
++ int filter_bytes = img_n*bytes;
++ int width = x;
++
++ STBI_ASSERT(out_n == s->img_n || out_n == s->img_n+1);
++ a->out = (stbi_uc *) stbi__malloc_mad3(x, y, output_bytes, 0); // extra bytes to write off the end into
++ if (!a->out) return stbi__err("outofmem", "Out of memory");
++
++ if (!stbi__mad3sizes_valid(img_n, x, depth, 7)) return stbi__err("too large", "Corrupt PNG");
++ img_width_bytes = (((img_n * x * depth) + 7) >> 3);
++ img_len = (img_width_bytes + 1) * y;
++
++ // we used to check for exact match between raw_len and img_len on non-interlaced PNGs,
++ // but issue #276 reported a PNG in the wild that had extra data at the end (all zeros),
++ // so just check for raw_len < img_len always.
++ if (raw_len < img_len) return stbi__err("not enough pixels","Corrupt PNG");
++
++ for (j=0; j < y; ++j) {
++ stbi_uc *cur = a->out + stride*j;
++ stbi_uc *prior;
++ int filter = *raw++;
++
++ if (filter > 4)
++ return stbi__err("invalid filter","Corrupt PNG");
++
++ if (depth < 8) {
++ STBI_ASSERT(img_width_bytes <= x);
++ cur += x*out_n - img_width_bytes; // store output to the rightmost img_len bytes, so we can decode in place
++ filter_bytes = 1;
++ width = img_width_bytes;
++ }
++ prior = cur - stride; // bugfix: need to compute this after 'cur +=' computation above
++
++ // if first row, use special filter that doesn't sample previous row
++ if (j == 0) filter = first_row_filter[filter];
++
++ // handle first byte explicitly
++ for (k=0; k < filter_bytes; ++k) {
++ switch (filter) {
++ case STBI__F_none : cur[k] = raw[k]; break;
++ case STBI__F_sub : cur[k] = raw[k]; break;
++ case STBI__F_up : cur[k] = STBI__BYTECAST(raw[k] + prior[k]); break;
++ case STBI__F_avg : cur[k] = STBI__BYTECAST(raw[k] + (prior[k]>>1)); break;
++ case STBI__F_paeth : cur[k] = STBI__BYTECAST(raw[k] + stbi__paeth(0,prior[k],0)); break;
++ case STBI__F_avg_first : cur[k] = raw[k]; break;
++ case STBI__F_paeth_first: cur[k] = raw[k]; break;
++ }
++ }
++
++ if (depth == 8) {
++ if (img_n != out_n)
++ cur[img_n] = 255; // first pixel
++ raw += img_n;
++ cur += out_n;
++ prior += out_n;
++ } else if (depth == 16) {
++ if (img_n != out_n) {
++ cur[filter_bytes] = 255; // first pixel top byte
++ cur[filter_bytes+1] = 255; // first pixel bottom byte
++ }
++ raw += filter_bytes;
++ cur += output_bytes;
++ prior += output_bytes;
++ } else {
++ raw += 1;
++ cur += 1;
++ prior += 1;
++ }
++
++ // this is a little gross, so that we don't switch per-pixel or per-component
++ if (depth < 8 || img_n == out_n) {
++ int nk = (width - 1)*filter_bytes;
++ #define STBI__CASE(f) \
++ case f: \
++ for (k=0; k < nk; ++k)
++ switch (filter) {
++ // "none" filter turns into a memcpy here; make that explicit.
++ case STBI__F_none: memcpy(cur, raw, nk); break;
++ STBI__CASE(STBI__F_sub) { cur[k] = STBI__BYTECAST(raw[k] + cur[k-filter_bytes]); } break;
++ STBI__CASE(STBI__F_up) { cur[k] = STBI__BYTECAST(raw[k] + prior[k]); } break;
++ STBI__CASE(STBI__F_avg) { cur[k] = STBI__BYTECAST(raw[k] + ((prior[k] + cur[k-filter_bytes])>>1)); } break;
++ STBI__CASE(STBI__F_paeth) { cur[k] = STBI__BYTECAST(raw[k] + stbi__paeth(cur[k-filter_bytes],prior[k],prior[k-filter_bytes])); } break;
++ STBI__CASE(STBI__F_avg_first) { cur[k] = STBI__BYTECAST(raw[k] + (cur[k-filter_bytes] >> 1)); } break;
++ STBI__CASE(STBI__F_paeth_first) { cur[k] = STBI__BYTECAST(raw[k] + stbi__paeth(cur[k-filter_bytes],0,0)); } break;
++ }
++ #undef STBI__CASE
++ raw += nk;
++ } else {
++ STBI_ASSERT(img_n+1 == out_n);
++ #define STBI__CASE(f) \
++ case f: \
++ for (i=x-1; i >= 1; --i, cur[filter_bytes]=255,raw+=filter_bytes,cur+=output_bytes,prior+=output_bytes) \
++ for (k=0; k < filter_bytes; ++k)
++ switch (filter) {
++ STBI__CASE(STBI__F_none) { cur[k] = raw[k]; } break;
++ STBI__CASE(STBI__F_sub) { cur[k] = STBI__BYTECAST(raw[k] + cur[k- output_bytes]); } break;
++ STBI__CASE(STBI__F_up) { cur[k] = STBI__BYTECAST(raw[k] + prior[k]); } break;
++ STBI__CASE(STBI__F_avg) { cur[k] = STBI__BYTECAST(raw[k] + ((prior[k] + cur[k- output_bytes])>>1)); } break;
++ STBI__CASE(STBI__F_paeth) { cur[k] = STBI__BYTECAST(raw[k] + stbi__paeth(cur[k- output_bytes],prior[k],prior[k- output_bytes])); } break;
++ STBI__CASE(STBI__F_avg_first) { cur[k] = STBI__BYTECAST(raw[k] + (cur[k- output_bytes] >> 1)); } break;
++ STBI__CASE(STBI__F_paeth_first) { cur[k] = STBI__BYTECAST(raw[k] + stbi__paeth(cur[k- output_bytes],0,0)); } break;
++ }
++ #undef STBI__CASE
++
++ // the loop above sets the high byte of the pixels' alpha, but for
++ // 16 bit png files we also need the low byte set. we'll do that here.
++ if (depth == 16) {
++ cur = a->out + stride*j; // start at the beginning of the row again
++ for (i=0; i < x; ++i,cur+=output_bytes) {
++ cur[filter_bytes+1] = 255;
++ }
++ }
++ }
++ }
++
++ // we make a separate pass to expand bits to pixels; for performance,
++ // this could run two scanlines behind the above code, so it won't
++ // intefere with filtering but will still be in the cache.
++ if (depth < 8) {
++ for (j=0; j < y; ++j) {
++ stbi_uc *cur = a->out + stride*j;
++ stbi_uc *in = a->out + stride*j + x*out_n - img_width_bytes;
++ // unpack 1/2/4-bit into a 8-bit buffer. allows us to keep the common 8-bit path optimal at minimal cost for 1/2/4-bit
++ // png guarante byte alignment, if width is not multiple of 8/4/2 we'll decode dummy trailing data that will be skipped in the later loop
++ stbi_uc scale = (color == 0) ? stbi__depth_scale_table[depth] : 1; // scale grayscale values to 0..255 range
++
++ // note that the final byte might overshoot and write more data than desired.
++ // we can allocate enough data that this never writes out of memory, but it
++ // could also overwrite the next scanline. can it overwrite non-empty data
++ // on the next scanline? yes, consider 1-pixel-wide scanlines with 1-bit-per-pixel.
++ // so we need to explicitly clamp the final ones
++
++ if (depth == 4) {
++ for (k=x*img_n; k >= 2; k-=2, ++in) {
++ *cur++ = scale * ((*in >> 4) );
++ *cur++ = scale * ((*in ) & 0x0f);
++ }
++ if (k > 0) *cur++ = scale * ((*in >> 4) );
++ } else if (depth == 2) {
++ for (k=x*img_n; k >= 4; k-=4, ++in) {
++ *cur++ = scale * ((*in >> 6) );
++ *cur++ = scale * ((*in >> 4) & 0x03);
++ *cur++ = scale * ((*in >> 2) & 0x03);
++ *cur++ = scale * ((*in ) & 0x03);
++ }
++ if (k > 0) *cur++ = scale * ((*in >> 6) );
++ if (k > 1) *cur++ = scale * ((*in >> 4) & 0x03);
++ if (k > 2) *cur++ = scale * ((*in >> 2) & 0x03);
++ } else if (depth == 1) {
++ for (k=x*img_n; k >= 8; k-=8, ++in) {
++ *cur++ = scale * ((*in >> 7) );
++ *cur++ = scale * ((*in >> 6) & 0x01);
++ *cur++ = scale * ((*in >> 5) & 0x01);
++ *cur++ = scale * ((*in >> 4) & 0x01);
++ *cur++ = scale * ((*in >> 3) & 0x01);
++ *cur++ = scale * ((*in >> 2) & 0x01);
++ *cur++ = scale * ((*in >> 1) & 0x01);
++ *cur++ = scale * ((*in ) & 0x01);
++ }
++ if (k > 0) *cur++ = scale * ((*in >> 7) );
++ if (k > 1) *cur++ = scale * ((*in >> 6) & 0x01);
++ if (k > 2) *cur++ = scale * ((*in >> 5) & 0x01);
++ if (k > 3) *cur++ = scale * ((*in >> 4) & 0x01);
++ if (k > 4) *cur++ = scale * ((*in >> 3) & 0x01);
++ if (k > 5) *cur++ = scale * ((*in >> 2) & 0x01);
++ if (k > 6) *cur++ = scale * ((*in >> 1) & 0x01);
++ }
++ if (img_n != out_n) {
++ int q;
++ // insert alpha = 255
++ cur = a->out + stride*j;
++ if (img_n == 1) {
++ for (q=x-1; q >= 0; --q) {
++ cur[q*2+1] = 255;
++ cur[q*2+0] = cur[q];
++ }
++ } else {
++ STBI_ASSERT(img_n == 3);
++ for (q=x-1; q >= 0; --q) {
++ cur[q*4+3] = 255;
++ cur[q*4+2] = cur[q*3+2];
++ cur[q*4+1] = cur[q*3+1];
++ cur[q*4+0] = cur[q*3+0];
++ }
++ }
++ }
++ }
++ } else if (depth == 16) {
++ // force the image data from big-endian to platform-native.
++ // this is done in a separate pass due to the decoding relying
++ // on the data being untouched, but could probably be done
++ // per-line during decode if care is taken.
++ stbi_uc *cur = a->out;
++ stbi__uint16 *cur16 = (stbi__uint16*)cur;
++
++ for(i=0; i < x*y*out_n; ++i,cur16++,cur+=2) {
++ *cur16 = (cur[0] << 8) | cur[1];
++ }
++ }
++
++ return 1;
++}
++
++static int stbi__create_png_image(stbi__png *a, stbi_uc *image_data, stbi__uint32 image_data_len, int out_n, int depth, int color, int interlaced)
++{
++ int bytes = (depth == 16 ? 2 : 1);
++ int out_bytes = out_n * bytes;
++ stbi_uc *final;
++ int p;
++ if (!interlaced)
++ return stbi__create_png_image_raw(a, image_data, image_data_len, out_n, a->s->img_x, a->s->img_y, depth, color);
++
++ // de-interlacing
++ final = (stbi_uc *) stbi__malloc_mad3(a->s->img_x, a->s->img_y, out_bytes, 0);
++ for (p=0; p < 7; ++p) {
++ int xorig[] = { 0,4,0,2,0,1,0 };
++ int yorig[] = { 0,0,4,0,2,0,1 };
++ int xspc[] = { 8,8,4,4,2,2,1 };
++ int yspc[] = { 8,8,8,4,4,2,2 };
++ int i,j,x,y;
++ // pass1_x[4] = 0, pass1_x[5] = 1, pass1_x[12] = 1
++ x = (a->s->img_x - xorig[p] + xspc[p]-1) / xspc[p];
++ y = (a->s->img_y - yorig[p] + yspc[p]-1) / yspc[p];
++ if (x && y) {
++ stbi__uint32 img_len = ((((a->s->img_n * x * depth) + 7) >> 3) + 1) * y;
++ if (!stbi__create_png_image_raw(a, image_data, image_data_len, out_n, x, y, depth, color)) {
++ STBI_FREE(final);
++ return 0;
++ }
++ for (j=0; j < y; ++j) {
++ for (i=0; i < x; ++i) {
++ int out_y = j*yspc[p]+yorig[p];
++ int out_x = i*xspc[p]+xorig[p];
++ memcpy(final + out_y*a->s->img_x*out_bytes + out_x*out_bytes,
++ a->out + (j*x+i)*out_bytes, out_bytes);
++ }
++ }
++ STBI_FREE(a->out);
++ image_data += img_len;
++ image_data_len -= img_len;
++ }
++ }
++ a->out = final;
++
++ return 1;
++}
++
++static int stbi__compute_transparency(stbi__png *z, stbi_uc tc[3], int out_n)
++{
++ stbi__context *s = z->s;
++ stbi__uint32 i, pixel_count = s->img_x * s->img_y;
++ stbi_uc *p = z->out;
++
++ // compute color-based transparency, assuming we've
++ // already got 255 as the alpha value in the output
++ STBI_ASSERT(out_n == 2 || out_n == 4);
++
++ if (out_n == 2) {
++ for (i=0; i < pixel_count; ++i) {
++ p[1] = (p[0] == tc[0] ? 0 : 255);
++ p += 2;
++ }
++ } else {
++ for (i=0; i < pixel_count; ++i) {
++ if (p[0] == tc[0] && p[1] == tc[1] && p[2] == tc[2])
++ p[3] = 0;
++ p += 4;
++ }
++ }
++ return 1;
++}
++
++static int stbi__compute_transparency16(stbi__png *z, stbi__uint16 tc[3], int out_n)
++{
++ stbi__context *s = z->s;
++ stbi__uint32 i, pixel_count = s->img_x * s->img_y;
++ stbi__uint16 *p = (stbi__uint16*) z->out;
++
++ // compute color-based transparency, assuming we've
++ // already got 65535 as the alpha value in the output
++ STBI_ASSERT(out_n == 2 || out_n == 4);
++
++ if (out_n == 2) {
++ for (i = 0; i < pixel_count; ++i) {
++ p[1] = (p[0] == tc[0] ? 0 : 65535);
++ p += 2;
++ }
++ } else {
++ for (i = 0; i < pixel_count; ++i) {
++ if (p[0] == tc[0] && p[1] == tc[1] && p[2] == tc[2])
++ p[3] = 0;
++ p += 4;
++ }
++ }
++ return 1;
++}
++
++static int stbi__expand_png_palette(stbi__png *a, stbi_uc *palette, int len, int pal_img_n)
++{
++ stbi__uint32 i, pixel_count = a->s->img_x * a->s->img_y;
++ stbi_uc *p, *temp_out, *orig = a->out;
++
++ p = (stbi_uc *) stbi__malloc_mad2(pixel_count, pal_img_n, 0);
++ if (p == NULL) return stbi__err("outofmem", "Out of memory");
++
++ // between here and free(out) below, exitting would leak
++ temp_out = p;
++
++ if (pal_img_n == 3) {
++ for (i=0; i < pixel_count; ++i) {
++ int n = orig[i]*4;
++ p[0] = palette[n ];
++ p[1] = palette[n+1];
++ p[2] = palette[n+2];
++ p += 3;
++ }
++ } else {
++ for (i=0; i < pixel_count; ++i) {
++ int n = orig[i]*4;
++ p[0] = palette[n ];
++ p[1] = palette[n+1];
++ p[2] = palette[n+2];
++ p[3] = palette[n+3];
++ p += 4;
++ }
++ }
++ STBI_FREE(a->out);
++ a->out = temp_out;
++
++ STBI_NOTUSED(len);
++
++ return 1;
++}
++
++static int stbi__unpremultiply_on_load = 0;
++static int stbi__de_iphone_flag = 0;
++
++STBIDEF void stbi_set_unpremultiply_on_load(int flag_true_if_should_unpremultiply)
++{
++ stbi__unpremultiply_on_load = flag_true_if_should_unpremultiply;
++}
++
++STBIDEF void stbi_convert_iphone_png_to_rgb(int flag_true_if_should_convert)
++{
++ stbi__de_iphone_flag = flag_true_if_should_convert;
++}
++
++static void stbi__de_iphone(stbi__png *z)
++{
++ stbi__context *s = z->s;
++ stbi__uint32 i, pixel_count = s->img_x * s->img_y;
++ stbi_uc *p = z->out;
++
++ if (s->img_out_n == 3) { // convert bgr to rgb
++ for (i=0; i < pixel_count; ++i) {
++ stbi_uc t = p[0];
++ p[0] = p[2];
++ p[2] = t;
++ p += 3;
++ }
++ } else {
++ STBI_ASSERT(s->img_out_n == 4);
++ if (stbi__unpremultiply_on_load) {
++ // convert bgr to rgb and unpremultiply
++ for (i=0; i < pixel_count; ++i) {
++ stbi_uc a = p[3];
++ stbi_uc t = p[0];
++ if (a) {
++ stbi_uc half = a / 2;
++ p[0] = (p[2] * 255 + half) / a;
++ p[1] = (p[1] * 255 + half) / a;
++ p[2] = ( t * 255 + half) / a;
++ } else {
++ p[0] = p[2];
++ p[2] = t;
++ }
++ p += 4;
++ }
++ } else {
++ // convert bgr to rgb
++ for (i=0; i < pixel_count; ++i) {
++ stbi_uc t = p[0];
++ p[0] = p[2];
++ p[2] = t;
++ p += 4;
++ }
++ }
++ }
++}
++
++#define STBI__PNG_TYPE(a,b,c,d) (((unsigned) (a) << 24) + ((unsigned) (b) << 16) + ((unsigned) (c) << 8) + (unsigned) (d))
++
++static int stbi__parse_png_file(stbi__png *z, int scan, int req_comp)
++{
++ stbi_uc palette[1024], pal_img_n=0;
++ stbi_uc has_trans=0, tc[3]={0};
++ stbi__uint16 tc16[3];
++ stbi__uint32 ioff=0, idata_limit=0, i, pal_len=0;
++ int first=1,k,interlace=0, color=0, is_iphone=0;
++ stbi__context *s = z->s;
++
++ z->expanded = NULL;
++ z->idata = NULL;
++ z->out = NULL;
++
++ if (!stbi__check_png_header(s)) return 0;
++
++ if (scan == STBI__SCAN_type) return 1;
++
++ for (;;) {
++ stbi__pngchunk c = stbi__get_chunk_header(s);
++ switch (c.type) {
++ case STBI__PNG_TYPE('C','g','B','I'):
++ is_iphone = 1;
++ stbi__skip(s, c.length);
++ break;
++ case STBI__PNG_TYPE('I','H','D','R'): {
++ int comp,filter;
++ if (!first) return stbi__err("multiple IHDR","Corrupt PNG");
++ first = 0;
++ if (c.length != 13) return stbi__err("bad IHDR len","Corrupt PNG");
++ s->img_x = stbi__get32be(s); if (s->img_x > (1 << 24)) return stbi__err("too large","Very large image (corrupt?)");
++ s->img_y = stbi__get32be(s); if (s->img_y > (1 << 24)) return stbi__err("too large","Very large image (corrupt?)");
++ z->depth = stbi__get8(s); if (z->depth != 1 && z->depth != 2 && z->depth != 4 && z->depth != 8 && z->depth != 16) return stbi__err("1/2/4/8/16-bit only","PNG not supported: 1/2/4/8/16-bit only");
++ color = stbi__get8(s); if (color > 6) return stbi__err("bad ctype","Corrupt PNG");
++ if (color == 3 && z->depth == 16) return stbi__err("bad ctype","Corrupt PNG");
++ if (color == 3) pal_img_n = 3; else if (color & 1) return stbi__err("bad ctype","Corrupt PNG");
++ comp = stbi__get8(s); if (comp) return stbi__err("bad comp method","Corrupt PNG");
++ filter= stbi__get8(s); if (filter) return stbi__err("bad filter method","Corrupt PNG");
++ interlace = stbi__get8(s); if (interlace>1) return stbi__err("bad interlace method","Corrupt PNG");
++ if (!s->img_x || !s->img_y) return stbi__err("0-pixel image","Corrupt PNG");
++ if (!pal_img_n) {
++ s->img_n = (color & 2 ? 3 : 1) + (color & 4 ? 1 : 0);
++ if ((1 << 30) / s->img_x / s->img_n < s->img_y) return stbi__err("too large", "Image too large to decode");
++ if (scan == STBI__SCAN_header) return 1;
++ } else {
++ // if paletted, then pal_n is our final components, and
++ // img_n is # components to decompress/filter.
++ s->img_n = 1;
++ if ((1 << 30) / s->img_x / 4 < s->img_y) return stbi__err("too large","Corrupt PNG");
++ // if SCAN_header, have to scan to see if we have a tRNS
++ }
++ break;
++ }
++
++ case STBI__PNG_TYPE('P','L','T','E'): {
++ if (first) return stbi__err("first not IHDR", "Corrupt PNG");
++ if (c.length > 256*3) return stbi__err("invalid PLTE","Corrupt PNG");
++ pal_len = c.length / 3;
++ if (pal_len * 3 != c.length) return stbi__err("invalid PLTE","Corrupt PNG");
++ for (i=0; i < pal_len; ++i) {
++ palette[i*4+0] = stbi__get8(s);
++ palette[i*4+1] = stbi__get8(s);
++ palette[i*4+2] = stbi__get8(s);
++ palette[i*4+3] = 255;
++ }
++ break;
++ }
++
++ case STBI__PNG_TYPE('t','R','N','S'): {
++ if (first) return stbi__err("first not IHDR", "Corrupt PNG");
++ if (z->idata) return stbi__err("tRNS after IDAT","Corrupt PNG");
++ if (pal_img_n) {
++ if (scan == STBI__SCAN_header) { s->img_n = 4; return 1; }
++ if (pal_len == 0) return stbi__err("tRNS before PLTE","Corrupt PNG");
++ if (c.length > pal_len) return stbi__err("bad tRNS len","Corrupt PNG");
++ pal_img_n = 4;
++ for (i=0; i < c.length; ++i)
++ palette[i*4+3] = stbi__get8(s);
++ } else {
++ if (!(s->img_n & 1)) return stbi__err("tRNS with alpha","Corrupt PNG");
++ if (c.length != (stbi__uint32) s->img_n*2) return stbi__err("bad tRNS len","Corrupt PNG");
++ has_trans = 1;
++ if (z->depth == 16) {
++ for (k = 0; k < s->img_n; ++k) tc16[k] = (stbi__uint16)stbi__get16be(s); // copy the values as-is
++ } else {
++ for (k = 0; k < s->img_n; ++k) tc[k] = (stbi_uc)(stbi__get16be(s) & 255) * stbi__depth_scale_table[z->depth]; // non 8-bit images will be larger
++ }
++ }
++ break;
++ }
++
++ case STBI__PNG_TYPE('I','D','A','T'): {
++ if (first) return stbi__err("first not IHDR", "Corrupt PNG");
++ if (pal_img_n && !pal_len) return stbi__err("no PLTE","Corrupt PNG");
++ if (scan == STBI__SCAN_header) { s->img_n = pal_img_n; return 1; }
++ if ((int)(ioff + c.length) < (int)ioff) return 0;
++ if (ioff + c.length > idata_limit) {
++ stbi__uint32 idata_limit_old = idata_limit;
++ stbi_uc *p;
++ if (idata_limit == 0) idata_limit = c.length > 4096 ? c.length : 4096;
++ while (ioff + c.length > idata_limit)
++ idata_limit *= 2;
++ STBI_NOTUSED(idata_limit_old);
++ p = (stbi_uc *) STBI_REALLOC_SIZED(z->idata, idata_limit_old, idata_limit); if (p == NULL) return stbi__err("outofmem", "Out of memory");
++ z->idata = p;
++ }
++ if (!stbi__getn(s, z->idata+ioff,c.length)) return stbi__err("outofdata","Corrupt PNG");
++ ioff += c.length;
++ break;
++ }
++
++ case STBI__PNG_TYPE('I','E','N','D'): {
++ stbi__uint32 raw_len, bpl;
++ if (first) return stbi__err("first not IHDR", "Corrupt PNG");
++ if (scan != STBI__SCAN_load) return 1;
++ if (z->idata == NULL) return stbi__err("no IDAT","Corrupt PNG");
++ // initial guess for decoded data size to avoid unnecessary reallocs
++ bpl = (s->img_x * z->depth + 7) / 8; // bytes per line, per component
++ raw_len = bpl * s->img_y * s->img_n /* pixels */ + s->img_y /* filter mode per row */;
++ z->expanded = (stbi_uc *) stbi_zlib_decode_malloc_guesssize_headerflag((char *) z->idata, ioff, raw_len, (int *) &raw_len, !is_iphone);
++ if (z->expanded == NULL) return 0; // zlib should set error
++ STBI_FREE(z->idata); z->idata = NULL;
++ if ((req_comp == s->img_n+1 && req_comp != 3 && !pal_img_n) || has_trans)
++ s->img_out_n = s->img_n+1;
++ else
++ s->img_out_n = s->img_n;
++ if (!stbi__create_png_image(z, z->expanded, raw_len, s->img_out_n, z->depth, color, interlace)) return 0;
++ if (has_trans) {
++ if (z->depth == 16) {
++ if (!stbi__compute_transparency16(z, tc16, s->img_out_n)) return 0;
++ } else {
++ if (!stbi__compute_transparency(z, tc, s->img_out_n)) return 0;
++ }
++ }
++ if (is_iphone && stbi__de_iphone_flag && s->img_out_n > 2)
++ stbi__de_iphone(z);
++ if (pal_img_n) {
++ // pal_img_n == 3 or 4
++ s->img_n = pal_img_n; // record the actual colors we had
++ s->img_out_n = pal_img_n;
++ if (req_comp >= 3) s->img_out_n = req_comp;
++ if (!stbi__expand_png_palette(z, palette, pal_len, s->img_out_n))
++ return 0;
++ } else if (has_trans) {
++ // non-paletted image with tRNS -> source image has (constant) alpha
++ ++s->img_n;
++ }
++ STBI_FREE(z->expanded); z->expanded = NULL;
++ return 1;
++ }
++
++ default:
++ // if critical, fail
++ if (first) return stbi__err("first not IHDR", "Corrupt PNG");
++ if ((c.type & (1 << 29)) == 0) {
++ #ifndef STBI_NO_FAILURE_STRINGS
++ // not threadsafe
++ static char invalid_chunk[] = "XXXX PNG chunk not known";
++ invalid_chunk[0] = STBI__BYTECAST(c.type >> 24);
++ invalid_chunk[1] = STBI__BYTECAST(c.type >> 16);
++ invalid_chunk[2] = STBI__BYTECAST(c.type >> 8);
++ invalid_chunk[3] = STBI__BYTECAST(c.type >> 0);
++ #endif
++ return stbi__err(invalid_chunk, "PNG not supported: unknown PNG chunk type");
++ }
++ stbi__skip(s, c.length);
++ break;
++ }
++ // end of PNG chunk, read and skip CRC
++ stbi__get32be(s);
++ }
++}
++
++static void *stbi__do_png(stbi__png *p, int *x, int *y, int *n, int req_comp, stbi__result_info *ri)
++{
++ void *result=NULL;
++ if (req_comp < 0 || req_comp > 4) return stbi__errpuc("bad req_comp", "Internal error");
++ if (stbi__parse_png_file(p, STBI__SCAN_load, req_comp)) {
++ if (p->depth < 8)
++ ri->bits_per_channel = 8;
++ else
++ ri->bits_per_channel = p->depth;
++ result = p->out;
++ p->out = NULL;
++ if (req_comp && req_comp != p->s->img_out_n) {
++ if (ri->bits_per_channel == 8)
++ result = stbi__convert_format((unsigned char *) result, p->s->img_out_n, req_comp, p->s->img_x, p->s->img_y);
++ else
++ result = stbi__convert_format16((stbi__uint16 *) result, p->s->img_out_n, req_comp, p->s->img_x, p->s->img_y);
++ p->s->img_out_n = req_comp;
++ if (result == NULL) return result;
++ }
++ *x = p->s->img_x;
++ *y = p->s->img_y;
++ if (n) *n = p->s->img_n;
++ }
++ STBI_FREE(p->out); p->out = NULL;
++ STBI_FREE(p->expanded); p->expanded = NULL;
++ STBI_FREE(p->idata); p->idata = NULL;
++
++ return result;
++}
++
++static void *stbi__png_load(stbi__context *s, int *x, int *y, int *comp, int req_comp, stbi__result_info *ri)
++{
++ stbi__png p;
++ p.s = s;
++ return stbi__do_png(&p, x,y,comp,req_comp, ri);
++}
++
++static int stbi__png_test(stbi__context *s)
++{
++ int r;
++ r = stbi__check_png_header(s);
++ stbi__rewind(s);
++ return r;
++}
++
++static int stbi__png_info_raw(stbi__png *p, int *x, int *y, int *comp)
++{
++ if (!stbi__parse_png_file(p, STBI__SCAN_header, 0)) {
++ stbi__rewind( p->s );
++ return 0;
++ }
++ if (x) *x = p->s->img_x;
++ if (y) *y = p->s->img_y;
++ if (comp) *comp = p->s->img_n;
++ return 1;
++}
++
++static int stbi__png_info(stbi__context *s, int *x, int *y, int *comp)
++{
++ stbi__png p;
++ p.s = s;
++ return stbi__png_info_raw(&p, x, y, comp);
++}
++
++static int stbi__png_is16(stbi__context *s)
++{
++ stbi__png p;
++ p.s = s;
++ if (!stbi__png_info_raw(&p, NULL, NULL, NULL))
++ return 0;
++ if (p.depth != 16) {
++ stbi__rewind(p.s);
++ return 0;
++ }
++ return 1;
++}
++#endif
++
++// Microsoft/Windows BMP image
++
++#ifndef STBI_NO_BMP
++static int stbi__bmp_test_raw(stbi__context *s)
++{
++ int r;
++ int sz;
++ if (stbi__get8(s) != 'B') return 0;
++ if (stbi__get8(s) != 'M') return 0;
++ stbi__get32le(s); // discard filesize
++ stbi__get16le(s); // discard reserved
++ stbi__get16le(s); // discard reserved
++ stbi__get32le(s); // discard data offset
++ sz = stbi__get32le(s);
++ r = (sz == 12 || sz == 40 || sz == 56 || sz == 108 || sz == 124);
++ return r;
++}
++
++static int stbi__bmp_test(stbi__context *s)
++{
++ int r = stbi__bmp_test_raw(s);
++ stbi__rewind(s);
++ return r;
++}
++
++
++// returns 0..31 for the highest set bit
++static int stbi__high_bit(unsigned int z)
++{
++ int n=0;
++ if (z == 0) return -1;
++ if (z >= 0x10000) { n += 16; z >>= 16; }
++ if (z >= 0x00100) { n += 8; z >>= 8; }
++ if (z >= 0x00010) { n += 4; z >>= 4; }
++ if (z >= 0x00004) { n += 2; z >>= 2; }
++ if (z >= 0x00002) { n += 1; z >>= 1; }
++ return n;
++}
++
++static int stbi__bitcount(unsigned int a)
++{
++ a = (a & 0x55555555) + ((a >> 1) & 0x55555555); // max 2
++ a = (a & 0x33333333) + ((a >> 2) & 0x33333333); // max 4
++ a = (a + (a >> 4)) & 0x0f0f0f0f; // max 8 per 4, now 8 bits
++ a = (a + (a >> 8)); // max 16 per 8 bits
++ a = (a + (a >> 16)); // max 32 per 8 bits
++ return a & 0xff;
++}
++
++// extract an arbitrarily-aligned N-bit value (N=bits)
++// from v, and then make it 8-bits long and fractionally
++// extend it to full full range.
++static int stbi__shiftsigned(unsigned int v, int shift, int bits)
++{
++ static unsigned int mul_table[9] = {
++ 0,
++ 0xff/*0b11111111*/, 0x55/*0b01010101*/, 0x49/*0b01001001*/, 0x11/*0b00010001*/,
++ 0x21/*0b00100001*/, 0x41/*0b01000001*/, 0x81/*0b10000001*/, 0x01/*0b00000001*/,
++ };
++ static unsigned int shift_table[9] = {
++ 0, 0,0,1,0,2,4,6,0,
++ };
++ if (shift < 0)
++ v <<= -shift;
++ else
++ v >>= shift;
++ STBI_ASSERT(v >= 0 && v < 256);
++ v >>= (8-bits);
++ STBI_ASSERT(bits >= 0 && bits <= 8);
++ return (int) ((unsigned) v * mul_table[bits]) >> shift_table[bits];
++}
++
++typedef struct
++{
++ int bpp, offset, hsz;
++ unsigned int mr,mg,mb,ma, all_a;
++} stbi__bmp_data;
++
++static void *stbi__bmp_parse_header(stbi__context *s, stbi__bmp_data *info)
++{
++ int hsz;
++ if (stbi__get8(s) != 'B' || stbi__get8(s) != 'M') return stbi__errpuc("not BMP", "Corrupt BMP");
++ stbi__get32le(s); // discard filesize
++ stbi__get16le(s); // discard reserved
++ stbi__get16le(s); // discard reserved
++ info->offset = stbi__get32le(s);
++ info->hsz = hsz = stbi__get32le(s);
++ info->mr = info->mg = info->mb = info->ma = 0;
++
++ if (hsz != 12 && hsz != 40 && hsz != 56 && hsz != 108 && hsz != 124) return stbi__errpuc("unknown BMP", "BMP type not supported: unknown");
++ if (hsz == 12) {
++ s->img_x = stbi__get16le(s);
++ s->img_y = stbi__get16le(s);
++ } else {
++ s->img_x = stbi__get32le(s);
++ s->img_y = stbi__get32le(s);
++ }
++ if (stbi__get16le(s) != 1) return stbi__errpuc("bad BMP", "bad BMP");
++ info->bpp = stbi__get16le(s);
++ if (hsz != 12) {
++ int compress = stbi__get32le(s);
++ if (compress == 1 || compress == 2) return stbi__errpuc("BMP RLE", "BMP type not supported: RLE");
++ stbi__get32le(s); // discard sizeof
++ stbi__get32le(s); // discard hres
++ stbi__get32le(s); // discard vres
++ stbi__get32le(s); // discard colorsused
++ stbi__get32le(s); // discard max important
++ if (hsz == 40 || hsz == 56) {
++ if (hsz == 56) {
++ stbi__get32le(s);
++ stbi__get32le(s);
++ stbi__get32le(s);
++ stbi__get32le(s);
++ }
++ if (info->bpp == 16 || info->bpp == 32) {
++ if (compress == 0) {
++ if (info->bpp == 32) {
++ info->mr = 0xffu << 16;
++ info->mg = 0xffu << 8;
++ info->mb = 0xffu << 0;
++ info->ma = 0xffu << 24;
++ info->all_a = 0; // if all_a is 0 at end, then we loaded alpha channel but it was all 0
++ } else {
++ info->mr = 31u << 10;
++ info->mg = 31u << 5;
++ info->mb = 31u << 0;
++ }
++ } else if (compress == 3) {
++ info->mr = stbi__get32le(s);
++ info->mg = stbi__get32le(s);
++ info->mb = stbi__get32le(s);
++ // not documented, but generated by photoshop and handled by mspaint
++ if (info->mr == info->mg && info->mg == info->mb) {
++ // ?!?!?
++ return stbi__errpuc("bad BMP", "bad BMP");
++ }
++ } else
++ return stbi__errpuc("bad BMP", "bad BMP");
++ }
++ } else {
++ int i;
++ if (hsz != 108 && hsz != 124)
++ return stbi__errpuc("bad BMP", "bad BMP");
++ info->mr = stbi__get32le(s);
++ info->mg = stbi__get32le(s);
++ info->mb = stbi__get32le(s);
++ info->ma = stbi__get32le(s);
++ stbi__get32le(s); // discard color space
++ for (i=0; i < 12; ++i)
++ stbi__get32le(s); // discard color space parameters
++ if (hsz == 124) {
++ stbi__get32le(s); // discard rendering intent
++ stbi__get32le(s); // discard offset of profile data
++ stbi__get32le(s); // discard size of profile data
++ stbi__get32le(s); // discard reserved
++ }
++ }
++ }
++ return (void *) 1;
++}
++
++
++static void *stbi__bmp_load(stbi__context *s, int *x, int *y, int *comp, int req_comp, stbi__result_info *ri)
++{
++ stbi_uc *out;
++ unsigned int mr=0,mg=0,mb=0,ma=0, all_a;
++ stbi_uc pal[256][4];
++ int psize=0,i,j,width;
++ int flip_vertically, pad, target;
++ stbi__bmp_data info;
++ STBI_NOTUSED(ri);
++
++ info.all_a = 255;
++ if (stbi__bmp_parse_header(s, &info) == NULL)
++ return NULL; // error code already set
++
++ flip_vertically = ((int) s->img_y) > 0;
++ s->img_y = abs((int) s->img_y);
++
++ mr = info.mr;
++ mg = info.mg;
++ mb = info.mb;
++ ma = info.ma;
++ all_a = info.all_a;
++
++ if (info.hsz == 12) {
++ if (info.bpp < 24)
++ psize = (info.offset - 14 - 24) / 3;
++ } else {
++ if (info.bpp < 16)
++ psize = (info.offset - 14 - info.hsz) >> 2;
++ }
++
++ s->img_n = ma ? 4 : 3;
++ if (req_comp && req_comp >= 3) // we can directly decode 3 or 4
++ target = req_comp;
++ else
++ target = s->img_n; // if they want monochrome, we'll post-convert
++
++ // sanity-check size
++ if (!stbi__mad3sizes_valid(target, s->img_x, s->img_y, 0))
++ return stbi__errpuc("too large", "Corrupt BMP");
++
++ out = (stbi_uc *) stbi__malloc_mad3(target, s->img_x, s->img_y, 0);
++ if (!out) return stbi__errpuc("outofmem", "Out of memory");
++ if (info.bpp < 16) {
++ int z=0;
++ if (psize == 0 || psize > 256) { STBI_FREE(out); return stbi__errpuc("invalid", "Corrupt BMP"); }
++ for (i=0; i < psize; ++i) {
++ pal[i][2] = stbi__get8(s);
++ pal[i][1] = stbi__get8(s);
++ pal[i][0] = stbi__get8(s);
++ if (info.hsz != 12) stbi__get8(s);
++ pal[i][3] = 255;
++ }
++ stbi__skip(s, info.offset - 14 - info.hsz - psize * (info.hsz == 12 ? 3 : 4));
++ if (info.bpp == 1) width = (s->img_x + 7) >> 3;
++ else if (info.bpp == 4) width = (s->img_x + 1) >> 1;
++ else if (info.bpp == 8) width = s->img_x;
++ else { STBI_FREE(out); return stbi__errpuc("bad bpp", "Corrupt BMP"); }
++ pad = (-width)&3;
++ if (info.bpp == 1) {
++ for (j=0; j < (int) s->img_y; ++j) {
++ int bit_offset = 7, v = stbi__get8(s);
++ for (i=0; i < (int) s->img_x; ++i) {
++ int color = (v>>bit_offset)&0x1;
++ out[z++] = pal[color][0];
++ out[z++] = pal[color][1];
++ out[z++] = pal[color][2];
++ if (target == 4) out[z++] = 255;
++ if (i+1 == (int) s->img_x) break;
++ if((--bit_offset) < 0) {
++ bit_offset = 7;
++ v = stbi__get8(s);
++ }
++ }
++ stbi__skip(s, pad);
++ }
++ } else {
++ for (j=0; j < (int) s->img_y; ++j) {
++ for (i=0; i < (int) s->img_x; i += 2) {
++ int v=stbi__get8(s),v2=0;
++ if (info.bpp == 4) {
++ v2 = v & 15;
++ v >>= 4;
++ }
++ out[z++] = pal[v][0];
++ out[z++] = pal[v][1];
++ out[z++] = pal[v][2];
++ if (target == 4) out[z++] = 255;
++ if (i+1 == (int) s->img_x) break;
++ v = (info.bpp == 8) ? stbi__get8(s) : v2;
++ out[z++] = pal[v][0];
++ out[z++] = pal[v][1];
++ out[z++] = pal[v][2];
++ if (target == 4) out[z++] = 255;
++ }
++ stbi__skip(s, pad);
++ }
++ }
++ } else {
++ int rshift=0,gshift=0,bshift=0,ashift=0,rcount=0,gcount=0,bcount=0,acount=0;
++ int z = 0;
++ int easy=0;
++ stbi__skip(s, info.offset - 14 - info.hsz);
++ if (info.bpp == 24) width = 3 * s->img_x;
++ else if (info.bpp == 16) width = 2*s->img_x;
++ else /* bpp = 32 and pad = 0 */ width=0;
++ pad = (-width) & 3;
++ if (info.bpp == 24) {
++ easy = 1;
++ } else if (info.bpp == 32) {
++ if (mb == 0xff && mg == 0xff00 && mr == 0x00ff0000 && ma == 0xff000000)
++ easy = 2;
++ }
++ if (!easy) {
++ if (!mr || !mg || !mb) { STBI_FREE(out); return stbi__errpuc("bad masks", "Corrupt BMP"); }
++ // right shift amt to put high bit in position #7
++ rshift = stbi__high_bit(mr)-7; rcount = stbi__bitcount(mr);
++ gshift = stbi__high_bit(mg)-7; gcount = stbi__bitcount(mg);
++ bshift = stbi__high_bit(mb)-7; bcount = stbi__bitcount(mb);
++ ashift = stbi__high_bit(ma)-7; acount = stbi__bitcount(ma);
++ }
++ for (j=0; j < (int) s->img_y; ++j) {
++ if (easy) {
++ for (i=0; i < (int) s->img_x; ++i) {
++ unsigned char a;
++ out[z+2] = stbi__get8(s);
++ out[z+1] = stbi__get8(s);
++ out[z+0] = stbi__get8(s);
++ z += 3;
++ a = (easy == 2 ? stbi__get8(s) : 255);
++ all_a |= a;
++ if (target == 4) out[z++] = a;
++ }
++ } else {
++ int bpp = info.bpp;
++ for (i=0; i < (int) s->img_x; ++i) {
++ stbi__uint32 v = (bpp == 16 ? (stbi__uint32) stbi__get16le(s) : stbi__get32le(s));
++ unsigned int a;
++ out[z++] = STBI__BYTECAST(stbi__shiftsigned(v & mr, rshift, rcount));
++ out[z++] = STBI__BYTECAST(stbi__shiftsigned(v & mg, gshift, gcount));
++ out[z++] = STBI__BYTECAST(stbi__shiftsigned(v & mb, bshift, bcount));
++ a = (ma ? stbi__shiftsigned(v & ma, ashift, acount) : 255);
++ all_a |= a;
++ if (target == 4) out[z++] = STBI__BYTECAST(a);
++ }
++ }
++ stbi__skip(s, pad);
++ }
++ }
++
++ // if alpha channel is all 0s, replace with all 255s
++ if (target == 4 && all_a == 0)
++ for (i=4*s->img_x*s->img_y-1; i >= 0; i -= 4)
++ out[i] = 255;
++
++ if (flip_vertically) {
++ stbi_uc t;
++ for (j=0; j < (int) s->img_y>>1; ++j) {
++ stbi_uc *p1 = out + j *s->img_x*target;
++ stbi_uc *p2 = out + (s->img_y-1-j)*s->img_x*target;
++ for (i=0; i < (int) s->img_x*target; ++i) {
++ t = p1[i]; p1[i] = p2[i]; p2[i] = t;
++ }
++ }
++ }
++
++ if (req_comp && req_comp != target) {
++ out = stbi__convert_format(out, target, req_comp, s->img_x, s->img_y);
++ if (out == NULL) return out; // stbi__convert_format frees input on failure
++ }
++
++ *x = s->img_x;
++ *y = s->img_y;
++ if (comp) *comp = s->img_n;
++ return out;
++}
++#endif
++
++// Targa Truevision - TGA
++// by Jonathan Dummer
++#ifndef STBI_NO_TGA
++// returns STBI_rgb or whatever, 0 on error
++static int stbi__tga_get_comp(int bits_per_pixel, int is_grey, int* is_rgb16)
++{
++ // only RGB or RGBA (incl. 16bit) or grey allowed
++ if (is_rgb16) *is_rgb16 = 0;
++ switch(bits_per_pixel) {
++ case 8: return STBI_grey;
++ case 16: if(is_grey) return STBI_grey_alpha;
++ // fallthrough
++ case 15: if(is_rgb16) *is_rgb16 = 1;
++ return STBI_rgb;
++ case 24: // fallthrough
++ case 32: return bits_per_pixel/8;
++ default: return 0;
++ }
++}
++
++static int stbi__tga_info(stbi__context *s, int *x, int *y, int *comp)
++{
++ int tga_w, tga_h, tga_comp, tga_image_type, tga_bits_per_pixel, tga_colormap_bpp;
++ int sz, tga_colormap_type;
++ stbi__get8(s); // discard Offset
++ tga_colormap_type = stbi__get8(s); // colormap type
++ if( tga_colormap_type > 1 ) {
++ stbi__rewind(s);
++ return 0; // only RGB or indexed allowed
++ }
++ tga_image_type = stbi__get8(s); // image type
++ if ( tga_colormap_type == 1 ) { // colormapped (paletted) image
++ if (tga_image_type != 1 && tga_image_type != 9) {
++ stbi__rewind(s);
++ return 0;
++ }
++ stbi__skip(s,4); // skip index of first colormap entry and number of entries
++ sz = stbi__get8(s); // check bits per palette color entry
++ if ( (sz != 8) && (sz != 15) && (sz != 16) && (sz != 24) && (sz != 32) ) {
++ stbi__rewind(s);
++ return 0;
++ }
++ stbi__skip(s,4); // skip image x and y origin
++ tga_colormap_bpp = sz;
++ } else { // "normal" image w/o colormap - only RGB or grey allowed, +/- RLE
++ if ( (tga_image_type != 2) && (tga_image_type != 3) && (tga_image_type != 10) && (tga_image_type != 11) ) {
++ stbi__rewind(s);
++ return 0; // only RGB or grey allowed, +/- RLE
++ }
++ stbi__skip(s,9); // skip colormap specification and image x/y origin
++ tga_colormap_bpp = 0;
++ }
++ tga_w = stbi__get16le(s);
++ if( tga_w < 1 ) {
++ stbi__rewind(s);
++ return 0; // test width
++ }
++ tga_h = stbi__get16le(s);
++ if( tga_h < 1 ) {
++ stbi__rewind(s);
++ return 0; // test height
++ }
++ tga_bits_per_pixel = stbi__get8(s); // bits per pixel
++ stbi__get8(s); // ignore alpha bits
++ if (tga_colormap_bpp != 0) {
++ if((tga_bits_per_pixel != 8) && (tga_bits_per_pixel != 16)) {
++ // when using a colormap, tga_bits_per_pixel is the size of the indexes
++ // I don't think anything but 8 or 16bit indexes makes sense
++ stbi__rewind(s);
++ return 0;
++ }
++ tga_comp = stbi__tga_get_comp(tga_colormap_bpp, 0, NULL);
++ } else {
++ tga_comp = stbi__tga_get_comp(tga_bits_per_pixel, (tga_image_type == 3) || (tga_image_type == 11), NULL);
++ }
++ if(!tga_comp) {
++ stbi__rewind(s);
++ return 0;
++ }
++ if (x) *x = tga_w;
++ if (y) *y = tga_h;
++ if (comp) *comp = tga_comp;
++ return 1; // seems to have passed everything
++}
++
++static int stbi__tga_test(stbi__context *s)
++{
++ int res = 0;
++ int sz, tga_color_type;
++ stbi__get8(s); // discard Offset
++ tga_color_type = stbi__get8(s); // color type
++ if ( tga_color_type > 1 ) goto errorEnd; // only RGB or indexed allowed
++ sz = stbi__get8(s); // image type
++ if ( tga_color_type == 1 ) { // colormapped (paletted) image
++ if (sz != 1 && sz != 9) goto errorEnd; // colortype 1 demands image type 1 or 9
++ stbi__skip(s,4); // skip index of first colormap entry and number of entries
++ sz = stbi__get8(s); // check bits per palette color entry
++ if ( (sz != 8) && (sz != 15) && (sz != 16) && (sz != 24) && (sz != 32) ) goto errorEnd;
++ stbi__skip(s,4); // skip image x and y origin
++ } else { // "normal" image w/o colormap
++ if ( (sz != 2) && (sz != 3) && (sz != 10) && (sz != 11) ) goto errorEnd; // only RGB or grey allowed, +/- RLE
++ stbi__skip(s,9); // skip colormap specification and image x/y origin
++ }
++ if ( stbi__get16le(s) < 1 ) goto errorEnd; // test width
++ if ( stbi__get16le(s) < 1 ) goto errorEnd; // test height
++ sz = stbi__get8(s); // bits per pixel
++ if ( (tga_color_type == 1) && (sz != 8) && (sz != 16) ) goto errorEnd; // for colormapped images, bpp is size of an index
++ if ( (sz != 8) && (sz != 15) && (sz != 16) && (sz != 24) && (sz != 32) ) goto errorEnd;
++
++ res = 1; // if we got this far, everything's good and we can return 1 instead of 0
++
++errorEnd:
++ stbi__rewind(s);
++ return res;
++}
++
++// read 16bit value and convert to 24bit RGB
++static void stbi__tga_read_rgb16(stbi__context *s, stbi_uc* out)
++{
++ stbi__uint16 px = (stbi__uint16)stbi__get16le(s);
++ stbi__uint16 fiveBitMask = 31;
++ // we have 3 channels with 5bits each
++ int r = (px >> 10) & fiveBitMask;
++ int g = (px >> 5) & fiveBitMask;
++ int b = px & fiveBitMask;
++ // Note that this saves the data in RGB(A) order, so it doesn't need to be swapped later
++ out[0] = (stbi_uc)((r * 255)/31);
++ out[1] = (stbi_uc)((g * 255)/31);
++ out[2] = (stbi_uc)((b * 255)/31);
++
++ // some people claim that the most significant bit might be used for alpha
++ // (possibly if an alpha-bit is set in the "image descriptor byte")
++ // but that only made 16bit test images completely translucent..
++ // so let's treat all 15 and 16bit TGAs as RGB with no alpha.
++}
++
++static void *stbi__tga_load(stbi__context *s, int *x, int *y, int *comp, int req_comp, stbi__result_info *ri)
++{
++ // read in the TGA header stuff
++ int tga_offset = stbi__get8(s);
++ int tga_indexed = stbi__get8(s);
++ int tga_image_type = stbi__get8(s);
++ int tga_is_RLE = 0;
++ int tga_palette_start = stbi__get16le(s);
++ int tga_palette_len = stbi__get16le(s);
++ int tga_palette_bits = stbi__get8(s);
++ int tga_x_origin = stbi__get16le(s);
++ int tga_y_origin = stbi__get16le(s);
++ int tga_width = stbi__get16le(s);
++ int tga_height = stbi__get16le(s);
++ int tga_bits_per_pixel = stbi__get8(s);
++ int tga_comp, tga_rgb16=0;
++ int tga_inverted = stbi__get8(s);
++ // int tga_alpha_bits = tga_inverted & 15; // the 4 lowest bits - unused (useless?)
++ // image data
++ unsigned char *tga_data;
++ unsigned char *tga_palette = NULL;
++ int i, j;
++ unsigned char raw_data[4] = {0};
++ int RLE_count = 0;
++ int RLE_repeating = 0;
++ int read_next_pixel = 1;
++ STBI_NOTUSED(ri);
++
++ // do a tiny bit of precessing
++ if ( tga_image_type >= 8 )
++ {
++ tga_image_type -= 8;
++ tga_is_RLE = 1;
++ }
++ tga_inverted = 1 - ((tga_inverted >> 5) & 1);
++
++ // If I'm paletted, then I'll use the number of bits from the palette
++ if ( tga_indexed ) tga_comp = stbi__tga_get_comp(tga_palette_bits, 0, &tga_rgb16);
++ else tga_comp = stbi__tga_get_comp(tga_bits_per_pixel, (tga_image_type == 3), &tga_rgb16);
++
++ if(!tga_comp) // shouldn't really happen, stbi__tga_test() should have ensured basic consistency
++ return stbi__errpuc("bad format", "Can't find out TGA pixelformat");
++
++ // tga info
++ *x = tga_width;
++ *y = tga_height;
++ if (comp) *comp = tga_comp;
++
++ if (!stbi__mad3sizes_valid(tga_width, tga_height, tga_comp, 0))
++ return stbi__errpuc("too large", "Corrupt TGA");
++
++ tga_data = (unsigned char*)stbi__malloc_mad3(tga_width, tga_height, tga_comp, 0);
++ if (!tga_data) return stbi__errpuc("outofmem", "Out of memory");
++
++ // skip to the data's starting position (offset usually = 0)
++ stbi__skip(s, tga_offset );
++
++ if ( !tga_indexed && !tga_is_RLE && !tga_rgb16 ) {
++ for (i=0; i < tga_height; ++i) {
++ int row = tga_inverted ? tga_height -i - 1 : i;
++ stbi_uc *tga_row = tga_data + row*tga_width*tga_comp;
++ stbi__getn(s, tga_row, tga_width * tga_comp);
++ }
++ } else {
++ // do I need to load a palette?
++ if ( tga_indexed)
++ {
++ // any data to skip? (offset usually = 0)
++ stbi__skip(s, tga_palette_start );
++ // load the palette
++ tga_palette = (unsigned char*)stbi__malloc_mad2(tga_palette_len, tga_comp, 0);
++ if (!tga_palette) {
++ STBI_FREE(tga_data);
++ return stbi__errpuc("outofmem", "Out of memory");
++ }
++ if (tga_rgb16) {
++ stbi_uc *pal_entry = tga_palette;
++ STBI_ASSERT(tga_comp == STBI_rgb);
++ for (i=0; i < tga_palette_len; ++i) {
++ stbi__tga_read_rgb16(s, pal_entry);
++ pal_entry += tga_comp;
++ }
++ } else if (!stbi__getn(s, tga_palette, tga_palette_len * tga_comp)) {
++ STBI_FREE(tga_data);
++ STBI_FREE(tga_palette);
++ return stbi__errpuc("bad palette", "Corrupt TGA");
++ }
++ }
++ // load the data
++ for (i=0; i < tga_width * tga_height; ++i)
++ {
++ // if I'm in RLE mode, do I need to get a RLE stbi__pngchunk?
++ if ( tga_is_RLE )
++ {
++ if ( RLE_count == 0 )
++ {
++ // yep, get the next byte as a RLE command
++ int RLE_cmd = stbi__get8(s);
++ RLE_count = 1 + (RLE_cmd & 127);
++ RLE_repeating = RLE_cmd >> 7;
++ read_next_pixel = 1;
++ } else if ( !RLE_repeating )
++ {
++ read_next_pixel = 1;
++ }
++ } else
++ {
++ read_next_pixel = 1;
++ }
++ // OK, if I need to read a pixel, do it now
++ if ( read_next_pixel )
++ {
++ // load however much data we did have
++ if ( tga_indexed )
++ {
++ // read in index, then perform the lookup
++ int pal_idx = (tga_bits_per_pixel == 8) ? stbi__get8(s) : stbi__get16le(s);
++ if ( pal_idx >= tga_palette_len ) {
++ // invalid index
++ pal_idx = 0;
++ }
++ pal_idx *= tga_comp;
++ for (j = 0; j < tga_comp; ++j) {
++ raw_data[j] = tga_palette[pal_idx+j];
++ }
++ } else if(tga_rgb16) {
++ STBI_ASSERT(tga_comp == STBI_rgb);
++ stbi__tga_read_rgb16(s, raw_data);
++ } else {
++ // read in the data raw
++ for (j = 0; j < tga_comp; ++j) {
++ raw_data[j] = stbi__get8(s);
++ }
++ }
++ // clear the reading flag for the next pixel
++ read_next_pixel = 0;
++ } // end of reading a pixel
++
++ // copy data
++ for (j = 0; j < tga_comp; ++j)
++ tga_data[i*tga_comp+j] = raw_data[j];
++
++ // in case we're in RLE mode, keep counting down
++ --RLE_count;
++ }
++ // do I need to invert the image?
++ if ( tga_inverted )
++ {
++ for (j = 0; j*2 < tga_height; ++j)
++ {
++ int index1 = j * tga_width * tga_comp;
++ int index2 = (tga_height - 1 - j) * tga_width * tga_comp;
++ for (i = tga_width * tga_comp; i > 0; --i)
++ {
++ unsigned char temp = tga_data[index1];
++ tga_data[index1] = tga_data[index2];
++ tga_data[index2] = temp;
++ ++index1;
++ ++index2;
++ }
++ }
++ }
++ // clear my palette, if I had one
++ if ( tga_palette != NULL )
++ {
++ STBI_FREE( tga_palette );
++ }
++ }
++
++ // swap RGB - if the source data was RGB16, it already is in the right order
++ if (tga_comp >= 3 && !tga_rgb16)
++ {
++ unsigned char* tga_pixel = tga_data;
++ for (i=0; i < tga_width * tga_height; ++i)
++ {
++ unsigned char temp = tga_pixel[0];
++ tga_pixel[0] = tga_pixel[2];
++ tga_pixel[2] = temp;
++ tga_pixel += tga_comp;
++ }
++ }
++
++ // convert to target component count
++ if (req_comp && req_comp != tga_comp)
++ tga_data = stbi__convert_format(tga_data, tga_comp, req_comp, tga_width, tga_height);
++
++ // the things I do to get rid of an error message, and yet keep
++ // Microsoft's C compilers happy... [8^(
++ tga_palette_start = tga_palette_len = tga_palette_bits =
++ tga_x_origin = tga_y_origin = 0;
++ // OK, done
++ return tga_data;
++}
++#endif
++
++// *************************************************************************************************
++// Photoshop PSD loader -- PD by Thatcher Ulrich, integration by Nicolas Schulz, tweaked by STB
++
++#ifndef STBI_NO_PSD
++static int stbi__psd_test(stbi__context *s)
++{
++ int r = (stbi__get32be(s) == 0x38425053);
++ stbi__rewind(s);
++ return r;
++}
++
++static int stbi__psd_decode_rle(stbi__context *s, stbi_uc *p, int pixelCount)
++{
++ int count, nleft, len;
++
++ count = 0;
++ while ((nleft = pixelCount - count) > 0) {
++ len = stbi__get8(s);
++ if (len == 128) {
++ // No-op.
++ } else if (len < 128) {
++ // Copy next len+1 bytes literally.
++ len++;
++ if (len > nleft) return 0; // corrupt data
++ count += len;
++ while (len) {
++ *p = stbi__get8(s);
++ p += 4;
++ len--;
++ }
++ } else if (len > 128) {
++ stbi_uc val;
++ // Next -len+1 bytes in the dest are replicated from next source byte.
++ // (Interpret len as a negative 8-bit int.)
++ len = 257 - len;
++ if (len > nleft) return 0; // corrupt data
++ val = stbi__get8(s);
++ count += len;
++ while (len) {
++ *p = val;
++ p += 4;
++ len--;
++ }
++ }
++ }
++
++ return 1;
++}
++
++static void *stbi__psd_load(stbi__context *s, int *x, int *y, int *comp, int req_comp, stbi__result_info *ri, int bpc)
++{
++ int pixelCount;
++ int channelCount, compression;
++ int channel, i;
++ int bitdepth;
++ int w,h;
++ stbi_uc *out;
++ STBI_NOTUSED(ri);
++
++ // Check identifier
++ if (stbi__get32be(s) != 0x38425053) // "8BPS"
++ return stbi__errpuc("not PSD", "Corrupt PSD image");
++
++ // Check file type version.
++ if (stbi__get16be(s) != 1)
++ return stbi__errpuc("wrong version", "Unsupported version of PSD image");
++
++ // Skip 6 reserved bytes.
++ stbi__skip(s, 6 );
++
++ // Read the number of channels (R, G, B, A, etc).
++ channelCount = stbi__get16be(s);
++ if (channelCount < 0 || channelCount > 16)
++ return stbi__errpuc("wrong channel count", "Unsupported number of channels in PSD image");
++
++ // Read the rows and columns of the image.
++ h = stbi__get32be(s);
++ w = stbi__get32be(s);
++
++ // Make sure the depth is 8 bits.
++ bitdepth = stbi__get16be(s);
++ if (bitdepth != 8 && bitdepth != 16)
++ return stbi__errpuc("unsupported bit depth", "PSD bit depth is not 8 or 16 bit");
++
++ // Make sure the color mode is RGB.
++ // Valid options are:
++ // 0: Bitmap
++ // 1: Grayscale
++ // 2: Indexed color
++ // 3: RGB color
++ // 4: CMYK color
++ // 7: Multichannel
++ // 8: Duotone
++ // 9: Lab color
++ if (stbi__get16be(s) != 3)
++ return stbi__errpuc("wrong color format", "PSD is not in RGB color format");
++
++ // Skip the Mode Data. (It's the palette for indexed color; other info for other modes.)
++ stbi__skip(s,stbi__get32be(s) );
++
++ // Skip the image resources. (resolution, pen tool paths, etc)
++ stbi__skip(s, stbi__get32be(s) );
++
++ // Skip the reserved data.
++ stbi__skip(s, stbi__get32be(s) );
++
++ // Find out if the data is compressed.
++ // Known values:
++ // 0: no compression
++ // 1: RLE compressed
++ compression = stbi__get16be(s);
++ if (compression > 1)
++ return stbi__errpuc("bad compression", "PSD has an unknown compression format");
++
++ // Check size
++ if (!stbi__mad3sizes_valid(4, w, h, 0))
++ return stbi__errpuc("too large", "Corrupt PSD");
++
++ // Create the destination image.
++
++ if (!compression && bitdepth == 16 && bpc == 16) {
++ out = (stbi_uc *) stbi__malloc_mad3(8, w, h, 0);
++ ri->bits_per_channel = 16;
++ } else
++ out = (stbi_uc *) stbi__malloc(4 * w*h);
++
++ if (!out) return stbi__errpuc("outofmem", "Out of memory");
++ pixelCount = w*h;
++
++ // Initialize the data to zero.
++ //memset( out, 0, pixelCount * 4 );
++
++ // Finally, the image data.
++ if (compression) {
++ // RLE as used by .PSD and .TIFF
++ // Loop until you get the number of unpacked bytes you are expecting:
++ // Read the next source byte into n.
++ // If n is between 0 and 127 inclusive, copy the next n+1 bytes literally.
++ // Else if n is between -127 and -1 inclusive, copy the next byte -n+1 times.
++ // Else if n is 128, noop.
++ // Endloop
++
++ // The RLE-compressed data is preceded by a 2-byte data count for each row in the data,
++ // which we're going to just skip.
++ stbi__skip(s, h * channelCount * 2 );
++
++ // Read the RLE data by channel.
++ for (channel = 0; channel < 4; channel++) {
++ stbi_uc *p;
++
++ p = out+channel;
++ if (channel >= channelCount) {
++ // Fill this channel with default data.
++ for (i = 0; i < pixelCount; i++, p += 4)
++ *p = (channel == 3 ? 255 : 0);
++ } else {
++ // Read the RLE data.
++ if (!stbi__psd_decode_rle(s, p, pixelCount)) {
++ STBI_FREE(out);
++ return stbi__errpuc("corrupt", "bad RLE data");
++ }
++ }
++ }
++
++ } else {
++ // We're at the raw image data. It's each channel in order (Red, Green, Blue, Alpha, ...)
++ // where each channel consists of an 8-bit (or 16-bit) value for each pixel in the image.
++
++ // Read the data by channel.
++ for (channel = 0; channel < 4; channel++) {
++ if (channel >= channelCount) {
++ // Fill this channel with default data.
++ if (bitdepth == 16 && bpc == 16) {
++ stbi__uint16 *q = ((stbi__uint16 *) out) + channel;
++ stbi__uint16 val = channel == 3 ? 65535 : 0;
++ for (i = 0; i < pixelCount; i++, q += 4)
++ *q = val;
++ } else {
++ stbi_uc *p = out+channel;
++ stbi_uc val = channel == 3 ? 255 : 0;
++ for (i = 0; i < pixelCount; i++, p += 4)
++ *p = val;
++ }
++ } else {
++ if (ri->bits_per_channel == 16) { // output bpc
++ stbi__uint16 *q = ((stbi__uint16 *) out) + channel;
++ for (i = 0; i < pixelCount; i++, q += 4)
++ *q = (stbi__uint16) stbi__get16be(s);
++ } else {
++ stbi_uc *p = out+channel;
++ if (bitdepth == 16) { // input bpc
++ for (i = 0; i < pixelCount; i++, p += 4)
++ *p = (stbi_uc) (stbi__get16be(s) >> 8);
++ } else {
++ for (i = 0; i < pixelCount; i++, p += 4)
++ *p = stbi__get8(s);
++ }
++ }
++ }
++ }
++ }
++
++ // remove weird white matte from PSD
++ if (channelCount >= 4) {
++ if (ri->bits_per_channel == 16) {
++ for (i=0; i < w*h; ++i) {
++ stbi__uint16 *pixel = (stbi__uint16 *) out + 4*i;
++ if (pixel[3] != 0 && pixel[3] != 65535) {
++ float a = pixel[3] / 65535.0f;
++ float ra = 1.0f / a;
++ float inv_a = 65535.0f * (1 - ra);
++ pixel[0] = (stbi__uint16) (pixel[0]*ra + inv_a);
++ pixel[1] = (stbi__uint16) (pixel[1]*ra + inv_a);
++ pixel[2] = (stbi__uint16) (pixel[2]*ra + inv_a);
++ }
++ }
++ } else {
++ for (i=0; i < w*h; ++i) {
++ unsigned char *pixel = out + 4*i;
++ if (pixel[3] != 0 && pixel[3] != 255) {
++ float a = pixel[3] / 255.0f;
++ float ra = 1.0f / a;
++ float inv_a = 255.0f * (1 - ra);
++ pixel[0] = (unsigned char) (pixel[0]*ra + inv_a);
++ pixel[1] = (unsigned char) (pixel[1]*ra + inv_a);
++ pixel[2] = (unsigned char) (pixel[2]*ra + inv_a);
++ }
++ }
++ }
++ }
++
++ // convert to desired output format
++ if (req_comp && req_comp != 4) {
++ if (ri->bits_per_channel == 16)
++ out = (stbi_uc *) stbi__convert_format16((stbi__uint16 *) out, 4, req_comp, w, h);
++ else
++ out = stbi__convert_format(out, 4, req_comp, w, h);
++ if (out == NULL) return out; // stbi__convert_format frees input on failure
++ }
++
++ if (comp) *comp = 4;
++ *y = h;
++ *x = w;
++
++ return out;
++}
++#endif
++
++// *************************************************************************************************
++// Softimage PIC loader
++// by Tom Seddon
++//
++// See http://softimage.wiki.softimage.com/index.php/INFO:_PIC_file_format
++// See http://ozviz.wasp.uwa.edu.au/~pbourke/dataformats/softimagepic/
++
++#ifndef STBI_NO_PIC
++static int stbi__pic_is4(stbi__context *s,const char *str)
++{
++ int i;
++ for (i=0; i<4; ++i)
++ if (stbi__get8(s) != (stbi_uc)str[i])
++ return 0;
++
++ return 1;
++}
++
++static int stbi__pic_test_core(stbi__context *s)
++{
++ int i;
++
++ if (!stbi__pic_is4(s,"\x53\x80\xF6\x34"))
++ return 0;
++
++ for(i=0;i<84;++i)
++ stbi__get8(s);
++
++ if (!stbi__pic_is4(s,"PICT"))
++ return 0;
++
++ return 1;
++}
++
++typedef struct
++{
++ stbi_uc size,type,channel;
++} stbi__pic_packet;
++
++static stbi_uc *stbi__readval(stbi__context *s, int channel, stbi_uc *dest)
++{
++ int mask=0x80, i;
++
++ for (i=0; i<4; ++i, mask>>=1) {
++ if (channel & mask) {
++ if (stbi__at_eof(s)) return stbi__errpuc("bad file","PIC file too short");
++ dest[i]=stbi__get8(s);
++ }
++ }
++
++ return dest;
++}
++
++static void stbi__copyval(int channel,stbi_uc *dest,const stbi_uc *src)
++{
++ int mask=0x80,i;
++
++ for (i=0;i<4; ++i, mask>>=1)
++ if (channel&mask)
++ dest[i]=src[i];
++}
++
++static stbi_uc *stbi__pic_load_core(stbi__context *s,int width,int height,int *comp, stbi_uc *result)
++{
++ int act_comp=0,num_packets=0,y,chained;
++ stbi__pic_packet packets[10];
++
++ // this will (should...) cater for even some bizarre stuff like having data
++ // for the same channel in multiple packets.
++ do {
++ stbi__pic_packet *packet;
++
++ if (num_packets==sizeof(packets)/sizeof(packets[0]))
++ return stbi__errpuc("bad format","too many packets");
++
++ packet = &packets[num_packets++];
++
++ chained = stbi__get8(s);
++ packet->size = stbi__get8(s);
++ packet->type = stbi__get8(s);
++ packet->channel = stbi__get8(s);
++
++ act_comp |= packet->channel;
++
++ if (stbi__at_eof(s)) return stbi__errpuc("bad file","file too short (reading packets)");
++ if (packet->size != 8) return stbi__errpuc("bad format","packet isn't 8bpp");
++ } while (chained);
++
++ *comp = (act_comp & 0x10 ? 4 : 3); // has alpha channel?
++
++ for(y=0; y<height; ++y) {
++ int packet_idx;
++
++ for(packet_idx=0; packet_idx < num_packets; ++packet_idx) {
++ stbi__pic_packet *packet = &packets[packet_idx];
++ stbi_uc *dest = result+y*width*4;
++
++ switch (packet->type) {
++ default:
++ return stbi__errpuc("bad format","packet has bad compression type");
++
++ case 0: {//uncompressed
++ int x;
++
++ for(x=0;x<width;++x, dest+=4)
++ if (!stbi__readval(s,packet->channel,dest))
++ return 0;
++ break;
++ }
++
++ case 1://Pure RLE
++ {
++ int left=width, i;
++
++ while (left>0) {
++ stbi_uc count,value[4];
++
++ count=stbi__get8(s);
++ if (stbi__at_eof(s)) return stbi__errpuc("bad file","file too short (pure read count)");
++
++ if (count > left)
++ count = (stbi_uc) left;
++
++ if (!stbi__readval(s,packet->channel,value)) return 0;
++
++ for(i=0; i<count; ++i,dest+=4)
++ stbi__copyval(packet->channel,dest,value);
++ left -= count;
++ }
++ }
++ break;
++
++ case 2: {//Mixed RLE
++ int left=width;
++ while (left>0) {
++ int count = stbi__get8(s), i;
++ if (stbi__at_eof(s)) return stbi__errpuc("bad file","file too short (mixed read count)");
++
++ if (count >= 128) { // Repeated
++ stbi_uc value[4];
++
++ if (count==128)
++ count = stbi__get16be(s);
++ else
++ count -= 127;
++ if (count > left)
++ return stbi__errpuc("bad file","scanline overrun");
++
++ if (!stbi__readval(s,packet->channel,value))
++ return 0;
++
++ for(i=0;i<count;++i, dest += 4)
++ stbi__copyval(packet->channel,dest,value);
++ } else { // Raw
++ ++count;
++ if (count>left) return stbi__errpuc("bad file","scanline overrun");
++
++ for(i=0;i<count;++i, dest+=4)
++ if (!stbi__readval(s,packet->channel,dest))
++ return 0;
++ }
++ left-=count;
++ }
++ break;
++ }
++ }
++ }
++ }
++
++ return result;
++}
++
++static void *stbi__pic_load(stbi__context *s,int *px,int *py,int *comp,int req_comp, stbi__result_info *ri)
++{
++ stbi_uc *result;
++ int i, x,y, internal_comp;
++ STBI_NOTUSED(ri);
++
++ if (!comp) comp = &internal_comp;
++
++ for (i=0; i<92; ++i)
++ stbi__get8(s);
++
++ x = stbi__get16be(s);
++ y = stbi__get16be(s);
++ if (stbi__at_eof(s)) return stbi__errpuc("bad file","file too short (pic header)");
++ if (!stbi__mad3sizes_valid(x, y, 4, 0)) return stbi__errpuc("too large", "PIC image too large to decode");
++
++ stbi__get32be(s); //skip `ratio'
++ stbi__get16be(s); //skip `fields'
++ stbi__get16be(s); //skip `pad'
++
++ // intermediate buffer is RGBA
++ result = (stbi_uc *) stbi__malloc_mad3(x, y, 4, 0);
++ memset(result, 0xff, x*y*4);
++
++ if (!stbi__pic_load_core(s,x,y,comp, result)) {
++ STBI_FREE(result);
++ result=0;
++ }
++ *px = x;
++ *py = y;
++ if (req_comp == 0) req_comp = *comp;
++ result=stbi__convert_format(result,4,req_comp,x,y);
++
++ return result;
++}
++
++static int stbi__pic_test(stbi__context *s)
++{
++ int r = stbi__pic_test_core(s);
++ stbi__rewind(s);
++ return r;
++}
++#endif
++
++// *************************************************************************************************
++// GIF loader -- public domain by Jean-Marc Lienher -- simplified/shrunk by stb
++
++#ifndef STBI_NO_GIF
++typedef struct
++{
++ stbi__int16 prefix;
++ stbi_uc first;
++ stbi_uc suffix;
++} stbi__gif_lzw;
++
++typedef struct
++{
++ int w,h;
++ stbi_uc *out; // output buffer (always 4 components)
++ stbi_uc *background; // The current "background" as far as a gif is concerned
++ stbi_uc *history;
++ int flags, bgindex, ratio, transparent, eflags;
++ stbi_uc pal[256][4];
++ stbi_uc lpal[256][4];
++ stbi__gif_lzw codes[8192];
++ stbi_uc *color_table;
++ int parse, step;
++ int lflags;
++ int start_x, start_y;
++ int max_x, max_y;
++ int cur_x, cur_y;
++ int line_size;
++ int delay;
++} stbi__gif;
++
++static int stbi__gif_test_raw(stbi__context *s)
++{
++ int sz;
++ if (stbi__get8(s) != 'G' || stbi__get8(s) != 'I' || stbi__get8(s) != 'F' || stbi__get8(s) != '8') return 0;
++ sz = stbi__get8(s);
++ if (sz != '9' && sz != '7') return 0;
++ if (stbi__get8(s) != 'a') return 0;
++ return 1;
++}
++
++static int stbi__gif_test(stbi__context *s)
++{
++ int r = stbi__gif_test_raw(s);
++ stbi__rewind(s);
++ return r;
++}
++
++static void stbi__gif_parse_colortable(stbi__context *s, stbi_uc pal[256][4], int num_entries, int transp)
++{
++ int i;
++ for (i=0; i < num_entries; ++i) {
++ pal[i][2] = stbi__get8(s);
++ pal[i][1] = stbi__get8(s);
++ pal[i][0] = stbi__get8(s);
++ pal[i][3] = transp == i ? 0 : 255;
++ }
++}
++
++static int stbi__gif_header(stbi__context *s, stbi__gif *g, int *comp, int is_info)
++{
++ stbi_uc version;
++ if (stbi__get8(s) != 'G' || stbi__get8(s) != 'I' || stbi__get8(s) != 'F' || stbi__get8(s) != '8')
++ return stbi__err("not GIF", "Corrupt GIF");
++
++ version = stbi__get8(s);
++ if (version != '7' && version != '9') return stbi__err("not GIF", "Corrupt GIF");
++ if (stbi__get8(s) != 'a') return stbi__err("not GIF", "Corrupt GIF");
++
++ stbi__g_failure_reason = "";
++ g->w = stbi__get16le(s);
++ g->h = stbi__get16le(s);
++ g->flags = stbi__get8(s);
++ g->bgindex = stbi__get8(s);
++ g->ratio = stbi__get8(s);
++ g->transparent = -1;
++
++ if (comp != 0) *comp = 4; // can't actually tell whether it's 3 or 4 until we parse the comments
++
++ if (is_info) return 1;
++
++ if (g->flags & 0x80)
++ stbi__gif_parse_colortable(s,g->pal, 2 << (g->flags & 7), -1);
++
++ return 1;
++}
++
++static int stbi__gif_info_raw(stbi__context *s, int *x, int *y, int *comp)
++{
++ stbi__gif* g = (stbi__gif*) stbi__malloc(sizeof(stbi__gif));
++ if (!stbi__gif_header(s, g, comp, 1)) {
++ STBI_FREE(g);
++ stbi__rewind( s );
++ return 0;
++ }
++ if (x) *x = g->w;
++ if (y) *y = g->h;
++ STBI_FREE(g);
++ return 1;
++}
++
++static void stbi__out_gif_code(stbi__gif *g, stbi__uint16 code)
++{
++ stbi_uc *p, *c;
++ int idx;
++
++ // recurse to decode the prefixes, since the linked-list is backwards,
++ // and working backwards through an interleaved image would be nasty
++ if (g->codes[code].prefix >= 0)
++ stbi__out_gif_code(g, g->codes[code].prefix);
++
++ if (g->cur_y >= g->max_y) return;
++
++ idx = g->cur_x + g->cur_y;
++ p = &g->out[idx];
++ g->history[idx / 4] = 1;
++
++ c = &g->color_table[g->codes[code].suffix * 4];
++ if (c[3] > 128) { // don't render transparent pixels;
++ p[0] = c[2];
++ p[1] = c[1];
++ p[2] = c[0];
++ p[3] = c[3];
++ }
++ g->cur_x += 4;
++
++ if (g->cur_x >= g->max_x) {
++ g->cur_x = g->start_x;
++ g->cur_y += g->step;
++
++ while (g->cur_y >= g->max_y && g->parse > 0) {
++ g->step = (1 << g->parse) * g->line_size;
++ g->cur_y = g->start_y + (g->step >> 1);
++ --g->parse;
++ }
++ }
++}
++
++static stbi_uc *stbi__process_gif_raster(stbi__context *s, stbi__gif *g)
++{
++ stbi_uc lzw_cs;
++ stbi__int32 len, init_code;
++ stbi__uint32 first;
++ stbi__int32 codesize, codemask, avail, oldcode, bits, valid_bits, clear;
++ stbi__gif_lzw *p;
++
++ lzw_cs = stbi__get8(s);
++ if (lzw_cs > 12) return NULL;
++ clear = 1 << lzw_cs;
++ first = 1;
++ codesize = lzw_cs + 1;
++ codemask = (1 << codesize) - 1;
++ bits = 0;
++ valid_bits = 0;
++ for (init_code = 0; init_code < clear; init_code++) {
++ g->codes[init_code].prefix = -1;
++ g->codes[init_code].first = (stbi_uc) init_code;
++ g->codes[init_code].suffix = (stbi_uc) init_code;
++ }
++
++ // support no starting clear code
++ avail = clear+2;
++ oldcode = -1;
++
++ len = 0;
++ for(;;) {
++ if (valid_bits < codesize) {
++ if (len == 0) {
++ len = stbi__get8(s); // start new block
++ if (len == 0)
++ return g->out;
++ }
++ --len;
++ bits |= (stbi__int32) stbi__get8(s) << valid_bits;
++ valid_bits += 8;
++ } else {
++ stbi__int32 code = bits & codemask;
++ bits >>= codesize;
++ valid_bits -= codesize;
++ // @OPTIMIZE: is there some way we can accelerate the non-clear path?
++ if (code == clear) { // clear code
++ codesize = lzw_cs + 1;
++ codemask = (1 << codesize) - 1;
++ avail = clear + 2;
++ oldcode = -1;
++ first = 0;
++ } else if (code == clear + 1) { // end of stream code
++ stbi__skip(s, len);
++ while ((len = stbi__get8(s)) > 0)
++ stbi__skip(s,len);
++ return g->out;
++ } else if (code <= avail) {
++ if (first) {
++ return stbi__errpuc("no clear code", "Corrupt GIF");
++ }
++
++ if (oldcode >= 0) {
++ p = &g->codes[avail++];
++ if (avail > 8192) {
++ return stbi__errpuc("too many codes", "Corrupt GIF");
++ }
++
++ p->prefix = (stbi__int16) oldcode;
++ p->first = g->codes[oldcode].first;
++ p->suffix = (code == avail) ? p->first : g->codes[code].first;
++ } else if (code == avail)
++ return stbi__errpuc("illegal code in raster", "Corrupt GIF");
++
++ stbi__out_gif_code(g, (stbi__uint16) code);
++
++ if ((avail & codemask) == 0 && avail <= 0x0FFF) {
++ codesize++;
++ codemask = (1 << codesize) - 1;
++ }
++
++ oldcode = code;
++ } else {
++ return stbi__errpuc("illegal code in raster", "Corrupt GIF");
++ }
++ }
++ }
++}
++
++// this function is designed to support animated gifs, although stb_image doesn't support it
++// two back is the image from two frames ago, used for a very specific disposal format
++static stbi_uc *stbi__gif_load_next(stbi__context *s, stbi__gif *g, int *comp, int req_comp, stbi_uc *two_back)
++{
++ int dispose;
++ int first_frame;
++ int pi;
++ int pcount;
++ STBI_NOTUSED(req_comp);
++
++ // on first frame, any non-written pixels get the background colour (non-transparent)
++ first_frame = 0;
++ if (g->out == 0) {
++ if (!stbi__gif_header(s, g, comp,0)) return 0; // stbi__g_failure_reason set by stbi__gif_header
++ if (!stbi__mad3sizes_valid(4, g->w, g->h, 0))
++ return stbi__errpuc("too large", "GIF image is too large");
++ pcount = g->w * g->h;
++ g->out = (stbi_uc *) stbi__malloc(4 * pcount);
++ g->background = (stbi_uc *) stbi__malloc(4 * pcount);
++ g->history = (stbi_uc *) stbi__malloc(pcount);
++ if (!g->out || !g->background || !g->history)
++ return stbi__errpuc("outofmem", "Out of memory");
++
++ // image is treated as "transparent" at the start - ie, nothing overwrites the current background;
++ // background colour is only used for pixels that are not rendered first frame, after that "background"
++ // color refers to the color that was there the previous frame.
++ memset(g->out, 0x00, 4 * pcount);
++ memset(g->background, 0x00, 4 * pcount); // state of the background (starts transparent)
++ memset(g->history, 0x00, pcount); // pixels that were affected previous frame
++ first_frame = 1;
++ } else {
++ // second frame - how do we dispoase of the previous one?
++ dispose = (g->eflags & 0x1C) >> 2;
++ pcount = g->w * g->h;
++
++ if ((dispose == 3) && (two_back == 0)) {
++ dispose = 2; // if I don't have an image to revert back to, default to the old background
++ }
++
++ if (dispose == 3) { // use previous graphic
++ for (pi = 0; pi < pcount; ++pi) {
++ if (g->history[pi]) {
++ memcpy( &g->out[pi * 4], &two_back[pi * 4], 4 );
++ }
++ }
++ } else if (dispose == 2) {
++ // restore what was changed last frame to background before that frame;
++ for (pi = 0; pi < pcount; ++pi) {
++ if (g->history[pi]) {
++ memcpy( &g->out[pi * 4], &g->background[pi * 4], 4 );
++ }
++ }
++ } else {
++ // This is a non-disposal case eithe way, so just
++ // leave the pixels as is, and they will become the new background
++ // 1: do not dispose
++ // 0: not specified.
++ }
++
++ // background is what out is after the undoing of the previou frame;
++ memcpy( g->background, g->out, 4 * g->w * g->h );
++ }
++
++ // clear my history;
++ memset( g->history, 0x00, g->w * g->h ); // pixels that were affected previous frame
++
++ for (;;) {
++ int tag = stbi__get8(s);
++ switch (tag) {
++ case 0x2C: /* Image Descriptor */
++ {
++ stbi__int32 x, y, w, h;
++ stbi_uc *o;
++
++ x = stbi__get16le(s);
++ y = stbi__get16le(s);
++ w = stbi__get16le(s);
++ h = stbi__get16le(s);
++ if (((x + w) > (g->w)) || ((y + h) > (g->h)))
++ return stbi__errpuc("bad Image Descriptor", "Corrupt GIF");
++
++ g->line_size = g->w * 4;
++ g->start_x = x * 4;
++ g->start_y = y * g->line_size;
++ g->max_x = g->start_x + w * 4;
++ g->max_y = g->start_y + h * g->line_size;
++ g->cur_x = g->start_x;
++ g->cur_y = g->start_y;
++
++ // if the width of the specified rectangle is 0, that means
++ // we may not see *any* pixels or the image is malformed;
++ // to make sure this is caught, move the current y down to
++ // max_y (which is what out_gif_code checks).
++ if (w == 0)
++ g->cur_y = g->max_y;
++
++ g->lflags = stbi__get8(s);
++
++ if (g->lflags & 0x40) {
++ g->step = 8 * g->line_size; // first interlaced spacing
++ g->parse = 3;
++ } else {
++ g->step = g->line_size;
++ g->parse = 0;
++ }
++
++ if (g->lflags & 0x80) {
++ stbi__gif_parse_colortable(s,g->lpal, 2 << (g->lflags & 7), g->eflags & 0x01 ? g->transparent : -1);
++ g->color_table = (stbi_uc *) g->lpal;
++ } else if (g->flags & 0x80) {
++ g->color_table = (stbi_uc *) g->pal;
++ } else
++ return stbi__errpuc("missing color table", "Corrupt GIF");
++
++ o = stbi__process_gif_raster(s, g);
++ if (!o) return NULL;
++
++ // if this was the first frame,
++ pcount = g->w * g->h;
++ if (first_frame && (g->bgindex > 0)) {
++ // if first frame, any pixel not drawn to gets the background color
++ for (pi = 0; pi < pcount; ++pi) {
++ if (g->history[pi] == 0) {
++ g->pal[g->bgindex][3] = 255; // just in case it was made transparent, undo that; It will be reset next frame if need be;
++ memcpy( &g->out[pi * 4], &g->pal[g->bgindex], 4 );
++ }
++ }
++ }
++
++ return o;
++ }
++
++ case 0x21: // Comment Extension.
++ {
++ int len;
++ int ext = stbi__get8(s);
++ if (ext == 0xF9) { // Graphic Control Extension.
++ len = stbi__get8(s);
++ if (len == 4) {
++ g->eflags = stbi__get8(s);
++ g->delay = 10 * stbi__get16le(s); // delay - 1/100th of a second, saving as 1/1000ths.
++
++ // unset old transparent
++ if (g->transparent >= 0) {
++ g->pal[g->transparent][3] = 255;
++ }
++ if (g->eflags & 0x01) {
++ g->transparent = stbi__get8(s);
++ if (g->transparent >= 0) {
++ g->pal[g->transparent][3] = 0;
++ }
++ } else {
++ // don't need transparent
++ stbi__skip(s, 1);
++ g->transparent = -1;
++ }
++ } else {
++ stbi__skip(s, len);
++ break;
++ }
++ }
++ while ((len = stbi__get8(s)) != 0) {
++ stbi__skip(s, len);
++ }
++ break;
++ }
++
++ case 0x3B: // gif stream termination code
++ return (stbi_uc *) s; // using '1' causes warning on some compilers
++
++ default:
++ return stbi__errpuc("unknown code", "Corrupt GIF");
++ }
++ }
++}
++
++static void *stbi__load_gif_main(stbi__context *s, int **delays, int *x, int *y, int *z, int *comp, int req_comp)
++{
++ if (stbi__gif_test(s)) {
++ int layers = 0;
++ stbi_uc *u = 0;
++ stbi_uc *out = 0;
++ stbi_uc *two_back = 0;
++ stbi__gif g;
++ int stride;
++ memset(&g, 0, sizeof(g));
++ if (delays) {
++ *delays = 0;
++ }
++
++ do {
++ u = stbi__gif_load_next(s, &g, comp, req_comp, two_back);
++ if (u == (stbi_uc *) s) u = 0; // end of animated gif marker
++
++ if (u) {
++ *x = g.w;
++ *y = g.h;
++ ++layers;
++ stride = g.w * g.h * 4;
++
++ if (out) {
++ out = (stbi_uc*) STBI_REALLOC( out, layers * stride );
++ if (delays) {
++ *delays = (int*) STBI_REALLOC( *delays, sizeof(int) * layers );
++ }
++ } else {
++ out = (stbi_uc*)stbi__malloc( layers * stride );
++ if (delays) {
++ *delays = (int*) stbi__malloc( layers * sizeof(int) );
++ }
++ }
++ memcpy( out + ((layers - 1) * stride), u, stride );
++ if (layers >= 2) {
++ two_back = out - 2 * stride;
++ }
++
++ if (delays) {
++ (*delays)[layers - 1U] = g.delay;
++ }
++ }
++ } while (u != 0);
++
++ // free temp buffer;
++ STBI_FREE(g.out);
++ STBI_FREE(g.history);
++ STBI_FREE(g.background);
++
++ // do the final conversion after loading everything;
++ if (req_comp && req_comp != 4)
++ out = stbi__convert_format(out, 4, req_comp, layers * g.w, g.h);
++
++ *z = layers;
++ return out;
++ } else {
++ return stbi__errpuc("not GIF", "Image was not as a gif type.");
++ }
++}
++
++static void *stbi__gif_load(stbi__context *s, int *x, int *y, int *comp, int req_comp, stbi__result_info *ri)
++{
++ stbi_uc *u = 0;
++ stbi__gif g;
++ memset(&g, 0, sizeof(g));
++ STBI_NOTUSED(ri);
++
++ u = stbi__gif_load_next(s, &g, comp, req_comp, 0);
++ if (u == (stbi_uc *) s) u = 0; // end of animated gif marker
++ if (u) {
++ *x = g.w;
++ *y = g.h;
++
++ // moved conversion to after successful load so that the same
++ // can be done for multiple frames.
++ if (req_comp && req_comp != 4)
++ u = stbi__convert_format(u, 4, req_comp, g.w, g.h);
++ } else if (g.out) {
++ // if there was an error and we allocated an image buffer, free it!
++ STBI_FREE(g.out);
++ }
++
++ // free buffers needed for multiple frame loading;
++ STBI_FREE(g.history);
++ STBI_FREE(g.background);
++
++ return u;
++}
++
++static int stbi__gif_info(stbi__context *s, int *x, int *y, int *comp)
++{
++ return stbi__gif_info_raw(s,x,y,comp);
++}
++#endif
++
++// *************************************************************************************************
++// Radiance RGBE HDR loader
++// originally by Nicolas Schulz
++#ifndef STBI_NO_HDR
++static int stbi__hdr_test_core(stbi__context *s, const char *signature)
++{
++ int i;
++ for (i=0; signature[i]; ++i)
++ if (stbi__get8(s) != signature[i])
++ return 0;
++ stbi__rewind(s);
++ return 1;
++}
++
++static int stbi__hdr_test(stbi__context* s)
++{
++ int r = stbi__hdr_test_core(s, "#?RADIANCE\n");
++ stbi__rewind(s);
++ if(!r) {
++ r = stbi__hdr_test_core(s, "#?RGBE\n");
++ stbi__rewind(s);
++ }
++ return r;
++}
++
++#define STBI__HDR_BUFLEN 1024
++static char *stbi__hdr_gettoken(stbi__context *z, char *buffer)
++{
++ int len=0;
++ char c = '\0';
++
++ c = (char) stbi__get8(z);
++
++ while (!stbi__at_eof(z) && c != '\n') {
++ buffer[len++] = c;
++ if (len == STBI__HDR_BUFLEN-1) {
++ // flush to end of line
++ while (!stbi__at_eof(z) && stbi__get8(z) != '\n')
++ ;
++ break;
++ }
++ c = (char) stbi__get8(z);
++ }
++
++ buffer[len] = 0;
++ return buffer;
++}
++
++static void stbi__hdr_convert(float *output, stbi_uc *input, int req_comp)
++{
++ if ( input[3] != 0 ) {
++ float f1;
++ // Exponent
++ f1 = (float) ldexp(1.0f, input[3] - (int)(128 + 8));
++ if (req_comp <= 2)
++ output[0] = (input[0] + input[1] + input[2]) * f1 / 3;
++ else {
++ output[0] = input[0] * f1;
++ output[1] = input[1] * f1;
++ output[2] = input[2] * f1;
++ }
++ if (req_comp == 2) output[1] = 1;
++ if (req_comp == 4) output[3] = 1;
++ } else {
++ switch (req_comp) {
++ case 4: output[3] = 1; /* fallthrough */
++ case 3: output[0] = output[1] = output[2] = 0;
++ break;
++ case 2: output[1] = 1; /* fallthrough */
++ case 1: output[0] = 0;
++ break;
++ }
++ }
++}
++
++static float *stbi__hdr_load(stbi__context *s, int *x, int *y, int *comp, int req_comp, stbi__result_info *ri)
++{
++ char buffer[STBI__HDR_BUFLEN];
++ char *token;
++ int valid = 0;
++ int width, height;
++ stbi_uc *scanline;
++ float *hdr_data;
++ int len;
++ unsigned char count, value;
++ int i, j, k, c1,c2, z;
++ const char *headerToken;
++ STBI_NOTUSED(ri);
++
++ // Check identifier
++ headerToken = stbi__hdr_gettoken(s,buffer);
++ if (strcmp(headerToken, "#?RADIANCE") != 0 && strcmp(headerToken, "#?RGBE") != 0)
++ return stbi__errpf("not HDR", "Corrupt HDR image");
++
++ // Parse header
++ for(;;) {
++ token = stbi__hdr_gettoken(s,buffer);
++ if (token[0] == 0) break;
++ if (strcmp(token, "FORMAT=32-bit_rle_rgbe") == 0) valid = 1;
++ }
++
++ if (!valid) return stbi__errpf("unsupported format", "Unsupported HDR format");
++
++ // Parse width and height
++ // can't use sscanf() if we're not using stdio!
++ token = stbi__hdr_gettoken(s,buffer);
++ if (strncmp(token, "-Y ", 3)) return stbi__errpf("unsupported data layout", "Unsupported HDR format");
++ token += 3;
++ height = (int) strtol(token, &token, 10);
++ while (*token == ' ') ++token;
++ if (strncmp(token, "+X ", 3)) return stbi__errpf("unsupported data layout", "Unsupported HDR format");
++ token += 3;
++ width = (int) strtol(token, NULL, 10);
++
++ *x = width;
++ *y = height;
++
++ if (comp) *comp = 3;
++ if (req_comp == 0) req_comp = 3;
++
++ if (!stbi__mad4sizes_valid(width, height, req_comp, sizeof(float), 0))
++ return stbi__errpf("too large", "HDR image is too large");
++
++ // Read data
++ hdr_data = (float *) stbi__malloc_mad4(width, height, req_comp, sizeof(float), 0);
++ if (!hdr_data)
++ return stbi__errpf("outofmem", "Out of memory");
++
++ // Load image data
++ // image data is stored as some number of sca
++ if ( width < 8 || width >= 32768) {
++ // Read flat data
++ for (j=0; j < height; ++j) {
++ for (i=0; i < width; ++i) {
++ stbi_uc rgbe[4];
++ main_decode_loop:
++ stbi__getn(s, rgbe, 4);
++ stbi__hdr_convert(hdr_data + j * width * req_comp + i * req_comp, rgbe, req_comp);
++ }
++ }
++ } else {
++ // Read RLE-encoded data
++ scanline = NULL;
++
++ for (j = 0; j < height; ++j) {
++ c1 = stbi__get8(s);
++ c2 = stbi__get8(s);
++ len = stbi__get8(s);
++ if (c1 != 2 || c2 != 2 || (len & 0x80)) {
++ // not run-length encoded, so we have to actually use THIS data as a decoded
++ // pixel (note this can't be a valid pixel--one of RGB must be >= 128)
++ stbi_uc rgbe[4];
++ rgbe[0] = (stbi_uc) c1;
++ rgbe[1] = (stbi_uc) c2;
++ rgbe[2] = (stbi_uc) len;
++ rgbe[3] = (stbi_uc) stbi__get8(s);
++ stbi__hdr_convert(hdr_data, rgbe, req_comp);
++ i = 1;
++ j = 0;
++ STBI_FREE(scanline);
++ goto main_decode_loop; // yes, this makes no sense
++ }
++ len <<= 8;
++ len |= stbi__get8(s);
++ if (len != width) { STBI_FREE(hdr_data); STBI_FREE(scanline); return stbi__errpf("invalid decoded scanline length", "corrupt HDR"); }
++ if (scanline == NULL) {
++ scanline = (stbi_uc *) stbi__malloc_mad2(width, 4, 0);
++ if (!scanline) {
++ STBI_FREE(hdr_data);
++ return stbi__errpf("outofmem", "Out of memory");
++ }
++ }
++
++ for (k = 0; k < 4; ++k) {
++ int nleft;
++ i = 0;
++ while ((nleft = width - i) > 0) {
++ count = stbi__get8(s);
++ if (count > 128) {
++ // Run
++ value = stbi__get8(s);
++ count -= 128;
++ if (count > nleft) { STBI_FREE(hdr_data); STBI_FREE(scanline); return stbi__errpf("corrupt", "bad RLE data in HDR"); }
++ for (z = 0; z < count; ++z)
++ scanline[i++ * 4 + k] = value;
++ } else {
++ // Dump
++ if (count > nleft) { STBI_FREE(hdr_data); STBI_FREE(scanline); return stbi__errpf("corrupt", "bad RLE data in HDR"); }
++ for (z = 0; z < count; ++z)
++ scanline[i++ * 4 + k] = stbi__get8(s);
++ }
++ }
++ }
++ for (i=0; i < width; ++i)
++ stbi__hdr_convert(hdr_data+(j*width + i)*req_comp, scanline + i*4, req_comp);
++ }
++ if (scanline)
++ STBI_FREE(scanline);
++ }
++
++ return hdr_data;
++}
++
++static int stbi__hdr_info(stbi__context *s, int *x, int *y, int *comp)
++{
++ char buffer[STBI__HDR_BUFLEN];
++ char *token;
++ int valid = 0;
++ int dummy;
++
++ if (!x) x = &dummy;
++ if (!y) y = &dummy;
++ if (!comp) comp = &dummy;
++
++ if (stbi__hdr_test(s) == 0) {
++ stbi__rewind( s );
++ return 0;
++ }
++
++ for(;;) {
++ token = stbi__hdr_gettoken(s,buffer);
++ if (token[0] == 0) break;
++ if (strcmp(token, "FORMAT=32-bit_rle_rgbe") == 0) valid = 1;
++ }
++
++ if (!valid) {
++ stbi__rewind( s );
++ return 0;
++ }
++ token = stbi__hdr_gettoken(s,buffer);
++ if (strncmp(token, "-Y ", 3)) {
++ stbi__rewind( s );
++ return 0;
++ }
++ token += 3;
++ *y = (int) strtol(token, &token, 10);
++ while (*token == ' ') ++token;
++ if (strncmp(token, "+X ", 3)) {
++ stbi__rewind( s );
++ return 0;
++ }
++ token += 3;
++ *x = (int) strtol(token, NULL, 10);
++ *comp = 3;
++ return 1;
++}
++#endif // STBI_NO_HDR
++
++#ifndef STBI_NO_BMP
++static int stbi__bmp_info(stbi__context *s, int *x, int *y, int *comp)
++{
++ void *p;
++ stbi__bmp_data info;
++
++ info.all_a = 255;
++ p = stbi__bmp_parse_header(s, &info);
++ stbi__rewind( s );
++ if (p == NULL)
++ return 0;
++ if (x) *x = s->img_x;
++ if (y) *y = s->img_y;
++ if (comp) *comp = info.ma ? 4 : 3;
++ return 1;
++}
++#endif
++
++#ifndef STBI_NO_PSD
++static int stbi__psd_info(stbi__context *s, int *x, int *y, int *comp)
++{
++ int channelCount, dummy, depth;
++ if (!x) x = &dummy;
++ if (!y) y = &dummy;
++ if (!comp) comp = &dummy;
++ if (stbi__get32be(s) != 0x38425053) {
++ stbi__rewind( s );
++ return 0;
++ }
++ if (stbi__get16be(s) != 1) {
++ stbi__rewind( s );
++ return 0;
++ }
++ stbi__skip(s, 6);
++ channelCount = stbi__get16be(s);
++ if (channelCount < 0 || channelCount > 16) {
++ stbi__rewind( s );
++ return 0;
++ }
++ *y = stbi__get32be(s);
++ *x = stbi__get32be(s);
++ depth = stbi__get16be(s);
++ if (depth != 8 && depth != 16) {
++ stbi__rewind( s );
++ return 0;
++ }
++ if (stbi__get16be(s) != 3) {
++ stbi__rewind( s );
++ return 0;
++ }
++ *comp = 4;
++ return 1;
++}
++
++static int stbi__psd_is16(stbi__context *s)
++{
++ int channelCount, depth;
++ if (stbi__get32be(s) != 0x38425053) {
++ stbi__rewind( s );
++ return 0;
++ }
++ if (stbi__get16be(s) != 1) {
++ stbi__rewind( s );
++ return 0;
++ }
++ stbi__skip(s, 6);
++ channelCount = stbi__get16be(s);
++ if (channelCount < 0 || channelCount > 16) {
++ stbi__rewind( s );
++ return 0;
++ }
++ (void) stbi__get32be(s);
++ (void) stbi__get32be(s);
++ depth = stbi__get16be(s);
++ if (depth != 16) {
++ stbi__rewind( s );
++ return 0;
++ }
++ return 1;
++}
++#endif
++
++#ifndef STBI_NO_PIC
++static int stbi__pic_info(stbi__context *s, int *x, int *y, int *comp)
++{
++ int act_comp=0,num_packets=0,chained,dummy;
++ stbi__pic_packet packets[10];
++
++ if (!x) x = &dummy;
++ if (!y) y = &dummy;
++ if (!comp) comp = &dummy;
++
++ if (!stbi__pic_is4(s,"\x53\x80\xF6\x34")) {
++ stbi__rewind(s);
++ return 0;
++ }
++
++ stbi__skip(s, 88);
++
++ *x = stbi__get16be(s);
++ *y = stbi__get16be(s);
++ if (stbi__at_eof(s)) {
++ stbi__rewind( s);
++ return 0;
++ }
++ if ( (*x) != 0 && (1 << 28) / (*x) < (*y)) {
++ stbi__rewind( s );
++ return 0;
++ }
++
++ stbi__skip(s, 8);
++
++ do {
++ stbi__pic_packet *packet;
++
++ if (num_packets==sizeof(packets)/sizeof(packets[0]))
++ return 0;
++
++ packet = &packets[num_packets++];
++ chained = stbi__get8(s);
++ packet->size = stbi__get8(s);
++ packet->type = stbi__get8(s);
++ packet->channel = stbi__get8(s);
++ act_comp |= packet->channel;
++
++ if (stbi__at_eof(s)) {
++ stbi__rewind( s );
++ return 0;
++ }
++ if (packet->size != 8) {
++ stbi__rewind( s );
++ return 0;
++ }
++ } while (chained);
++
++ *comp = (act_comp & 0x10 ? 4 : 3);
++
++ return 1;
++}
++#endif
++
++// *************************************************************************************************
++// Portable Gray Map and Portable Pixel Map loader
++// by Ken Miller
++//
++// PGM: http://netpbm.sourceforge.net/doc/pgm.html
++// PPM: http://netpbm.sourceforge.net/doc/ppm.html
++//
++// Known limitations:
++// Does not support comments in the header section
++// Does not support ASCII image data (formats P2 and P3)
++// Does not support 16-bit-per-channel
++
++#ifndef STBI_NO_PNM
++
++static int stbi__pnm_test(stbi__context *s)
++{
++ char p, t;
++ p = (char) stbi__get8(s);
++ t = (char) stbi__get8(s);
++ if (p != 'P' || (t != '5' && t != '6')) {
++ stbi__rewind( s );
++ return 0;
++ }
++ return 1;
++}
++
++static void *stbi__pnm_load(stbi__context *s, int *x, int *y, int *comp, int req_comp, stbi__result_info *ri)
++{
++ stbi_uc *out;
++ STBI_NOTUSED(ri);
++
++ if (!stbi__pnm_info(s, (int *)&s->img_x, (int *)&s->img_y, (int *)&s->img_n))
++ return 0;
++
++ *x = s->img_x;
++ *y = s->img_y;
++ if (comp) *comp = s->img_n;
++
++ if (!stbi__mad3sizes_valid(s->img_n, s->img_x, s->img_y, 0))
++ return stbi__errpuc("too large", "PNM too large");
++
++ out = (stbi_uc *) stbi__malloc_mad3(s->img_n, s->img_x, s->img_y, 0);
++ if (!out) return stbi__errpuc("outofmem", "Out of memory");
++ stbi__getn(s, out, s->img_n * s->img_x * s->img_y);
++
++ if (req_comp && req_comp != s->img_n) {
++ out = stbi__convert_format(out, s->img_n, req_comp, s->img_x, s->img_y);
++ if (out == NULL) return out; // stbi__convert_format frees input on failure
++ }
++ return out;
++}
++
++static int stbi__pnm_isspace(char c)
++{
++ return c == ' ' || c == '\t' || c == '\n' || c == '\v' || c == '\f' || c == '\r';
++}
++
++static void stbi__pnm_skip_whitespace(stbi__context *s, char *c)
++{
++ for (;;) {
++ while (!stbi__at_eof(s) && stbi__pnm_isspace(*c))
++ *c = (char) stbi__get8(s);
++
++ if (stbi__at_eof(s) || *c != '#')
++ break;
++
++ while (!stbi__at_eof(s) && *c != '\n' && *c != '\r' )
++ *c = (char) stbi__get8(s);
++ }
++}
++
++static int stbi__pnm_isdigit(char c)
++{
++ return c >= '0' && c <= '9';
++}
++
++static int stbi__pnm_getinteger(stbi__context *s, char *c)
++{
++ int value = 0;
++
++ while (!stbi__at_eof(s) && stbi__pnm_isdigit(*c)) {
++ value = value*10 + (*c - '0');
++ *c = (char) stbi__get8(s);
++ }
++
++ return value;
++}
++
++static int stbi__pnm_info(stbi__context *s, int *x, int *y, int *comp)
++{
++ int maxv, dummy;
++ char c, p, t;
++
++ if (!x) x = &dummy;
++ if (!y) y = &dummy;
++ if (!comp) comp = &dummy;
++
++ stbi__rewind(s);
++
++ // Get identifier
++ p = (char) stbi__get8(s);
++ t = (char) stbi__get8(s);
++ if (p != 'P' || (t != '5' && t != '6')) {
++ stbi__rewind(s);
++ return 0;
++ }
++
++ *comp = (t == '6') ? 3 : 1; // '5' is 1-component .pgm; '6' is 3-component .ppm
++
++ c = (char) stbi__get8(s);
++ stbi__pnm_skip_whitespace(s, &c);
++
++ *x = stbi__pnm_getinteger(s, &c); // read width
++ stbi__pnm_skip_whitespace(s, &c);
++
++ *y = stbi__pnm_getinteger(s, &c); // read height
++ stbi__pnm_skip_whitespace(s, &c);
++
++ maxv = stbi__pnm_getinteger(s, &c); // read max value
++
++ if (maxv > 255)
++ return stbi__err("max value > 255", "PPM image not 8-bit");
++ else
++ return 1;
++}
++#endif
++
++static int stbi__info_main(stbi__context *s, int *x, int *y, int *comp)
++{
++ #ifndef STBI_NO_JPEG
++ if (stbi__jpeg_info(s, x, y, comp)) return 1;
++ #endif
++
++ #ifndef STBI_NO_PNG
++ if (stbi__png_info(s, x, y, comp)) return 1;
++ #endif
++
++ #ifndef STBI_NO_GIF
++ if (stbi__gif_info(s, x, y, comp)) return 1;
++ #endif
++
++ #ifndef STBI_NO_BMP
++ if (stbi__bmp_info(s, x, y, comp)) return 1;
++ #endif
++
++ #ifndef STBI_NO_PSD
++ if (stbi__psd_info(s, x, y, comp)) return 1;
++ #endif
++
++ #ifndef STBI_NO_PIC
++ if (stbi__pic_info(s, x, y, comp)) return 1;
++ #endif
++
++ #ifndef STBI_NO_PNM
++ if (stbi__pnm_info(s, x, y, comp)) return 1;
++ #endif
++
++ #ifndef STBI_NO_HDR
++ if (stbi__hdr_info(s, x, y, comp)) return 1;
++ #endif
++
++ // test tga last because it's a crappy test!
++ #ifndef STBI_NO_TGA
++ if (stbi__tga_info(s, x, y, comp))
++ return 1;
++ #endif
++ return stbi__err("unknown image type", "Image not of any known type, or corrupt");
++}
++
++static int stbi__is_16_main(stbi__context *s)
++{
++ #ifndef STBI_NO_PNG
++ if (stbi__png_is16(s)) return 1;
++ #endif
++
++ #ifndef STBI_NO_PSD
++ if (stbi__psd_is16(s)) return 1;
++ #endif
++
++ return 0;
++}
++
++#ifndef STBI_NO_STDIO
++STBIDEF int stbi_info(char const *filename, int *x, int *y, int *comp)
++{
++ FILE *f = stbi__fopen(filename, "rb");
++ int result;
++ if (!f) return stbi__err("can't fopen", "Unable to open file");
++ result = stbi_info_from_file(f, x, y, comp);
++ fclose(f);
++ return result;
++}
++
++STBIDEF int stbi_info_from_file(FILE *f, int *x, int *y, int *comp)
++{
++ int r;
++ stbi__context s;
++ long pos = ftell(f);
++ stbi__start_file(&s, f);
++ r = stbi__info_main(&s,x,y,comp);
++ fseek(f,pos,SEEK_SET);
++ return r;
++}
++
++STBIDEF int stbi_is_16_bit(char const *filename)
++{
++ FILE *f = stbi__fopen(filename, "rb");
++ int result;
++ if (!f) return stbi__err("can't fopen", "Unable to open file");
++ result = stbi_is_16_bit_from_file(f);
++ fclose(f);
++ return result;
++}
++
++STBIDEF int stbi_is_16_bit_from_file(FILE *f)
++{
++ int r;
++ stbi__context s;
++ long pos = ftell(f);
++ stbi__start_file(&s, f);
++ r = stbi__is_16_main(&s);
++ fseek(f,pos,SEEK_SET);
++ return r;
++}
++#endif // !STBI_NO_STDIO
++
++STBIDEF int stbi_info_from_memory(stbi_uc const *buffer, int len, int *x, int *y, int *comp)
++{
++ stbi__context s;
++ stbi__start_mem(&s,buffer,len);
++ return stbi__info_main(&s,x,y,comp);
++}
++
++STBIDEF int stbi_info_from_callbacks(stbi_io_callbacks const *c, void *user, int *x, int *y, int *comp)
++{
++ stbi__context s;
++ stbi__start_callbacks(&s, (stbi_io_callbacks *) c, user);
++ return stbi__info_main(&s,x,y,comp);
++}
++
++STBIDEF int stbi_is_16_bit_from_memory(stbi_uc const *buffer, int len)
++{
++ stbi__context s;
++ stbi__start_mem(&s,buffer,len);
++ return stbi__is_16_main(&s);
++}
++
++STBIDEF int stbi_is_16_bit_from_callbacks(stbi_io_callbacks const *c, void *user)
++{
++ stbi__context s;
++ stbi__start_callbacks(&s, (stbi_io_callbacks *) c, user);
++ return stbi__is_16_main(&s);
++}
++
++#endif // STB_IMAGE_IMPLEMENTATION
++
++/*
++ revision history:
++ 2.20 (2019-02-07) support utf8 filenames in Windows; fix warnings and platform ifdefs
++ 2.19 (2018-02-11) fix warning
++ 2.18 (2018-01-30) fix warnings
++ 2.17 (2018-01-29) change sbti__shiftsigned to avoid clang -O2 bug
++ 1-bit BMP
++ *_is_16_bit api
++ avoid warnings
++ 2.16 (2017-07-23) all functions have 16-bit variants;
++ STBI_NO_STDIO works again;
++ compilation fixes;
++ fix rounding in unpremultiply;
++ optimize vertical flip;
++ disable raw_len validation;
++ documentation fixes
++ 2.15 (2017-03-18) fix png-1,2,4 bug; now all Imagenet JPGs decode;
++ warning fixes; disable run-time SSE detection on gcc;
++ uniform handling of optional "return" values;
++ thread-safe initialization of zlib tables
++ 2.14 (2017-03-03) remove deprecated STBI_JPEG_OLD; fixes for Imagenet JPGs
++ 2.13 (2016-11-29) add 16-bit API, only supported for PNG right now
++ 2.12 (2016-04-02) fix typo in 2.11 PSD fix that caused crashes
++ 2.11 (2016-04-02) allocate large structures on the stack
++ remove white matting for transparent PSD
++ fix reported channel count for PNG & BMP
++ re-enable SSE2 in non-gcc 64-bit
++ support RGB-formatted JPEG
++ read 16-bit PNGs (only as 8-bit)
++ 2.10 (2016-01-22) avoid warning introduced in 2.09 by STBI_REALLOC_SIZED
++ 2.09 (2016-01-16) allow comments in PNM files
++ 16-bit-per-pixel TGA (not bit-per-component)
++ info() for TGA could break due to .hdr handling
++ info() for BMP to shares code instead of sloppy parse
++ can use STBI_REALLOC_SIZED if allocator doesn't support realloc
++ code cleanup
++ 2.08 (2015-09-13) fix to 2.07 cleanup, reading RGB PSD as RGBA
++ 2.07 (2015-09-13) fix compiler warnings
++ partial animated GIF support
++ limited 16-bpc PSD support
++ #ifdef unused functions
++ bug with < 92 byte PIC,PNM,HDR,TGA
++ 2.06 (2015-04-19) fix bug where PSD returns wrong '*comp' value
++ 2.05 (2015-04-19) fix bug in progressive JPEG handling, fix warning
++ 2.04 (2015-04-15) try to re-enable SIMD on MinGW 64-bit
++ 2.03 (2015-04-12) extra corruption checking (mmozeiko)
++ stbi_set_flip_vertically_on_load (nguillemot)
++ fix NEON support; fix mingw support
++ 2.02 (2015-01-19) fix incorrect assert, fix warning
++ 2.01 (2015-01-17) fix various warnings; suppress SIMD on gcc 32-bit without -msse2
++ 2.00b (2014-12-25) fix STBI_MALLOC in progressive JPEG
++ 2.00 (2014-12-25) optimize JPG, including x86 SSE2 & NEON SIMD (ryg)
++ progressive JPEG (stb)
++ PGM/PPM support (Ken Miller)
++ STBI_MALLOC,STBI_REALLOC,STBI_FREE
++ GIF bugfix -- seemingly never worked
++ STBI_NO_*, STBI_ONLY_*
++ 1.48 (2014-12-14) fix incorrectly-named assert()
++ 1.47 (2014-12-14) 1/2/4-bit PNG support, both direct and paletted (Omar Cornut & stb)
++ optimize PNG (ryg)
++ fix bug in interlaced PNG with user-specified channel count (stb)
++ 1.46 (2014-08-26)
++ fix broken tRNS chunk (colorkey-style transparency) in non-paletted PNG
++ 1.45 (2014-08-16)
++ fix MSVC-ARM internal compiler error by wrapping malloc
++ 1.44 (2014-08-07)
++ various warning fixes from Ronny Chevalier
++ 1.43 (2014-07-15)
++ fix MSVC-only compiler problem in code changed in 1.42
++ 1.42 (2014-07-09)
++ don't define _CRT_SECURE_NO_WARNINGS (affects user code)
++ fixes to stbi__cleanup_jpeg path
++ added STBI_ASSERT to avoid requiring assert.h
++ 1.41 (2014-06-25)
++ fix search&replace from 1.36 that messed up comments/error messages
++ 1.40 (2014-06-22)
++ fix gcc struct-initialization warning
++ 1.39 (2014-06-15)
++ fix to TGA optimization when req_comp != number of components in TGA;
++ fix to GIF loading because BMP wasn't rewinding (whoops, no GIFs in my test suite)
++ add support for BMP version 5 (more ignored fields)
++ 1.38 (2014-06-06)
++ suppress MSVC warnings on integer casts truncating values
++ fix accidental rename of 'skip' field of I/O
++ 1.37 (2014-06-04)
++ remove duplicate typedef
++ 1.36 (2014-06-03)
++ convert to header file single-file library
++ if de-iphone isn't set, load iphone images color-swapped instead of returning NULL
++ 1.35 (2014-05-27)
++ various warnings
++ fix broken STBI_SIMD path
++ fix bug where stbi_load_from_file no longer left file pointer in correct place
++ fix broken non-easy path for 32-bit BMP (possibly never used)
++ TGA optimization by Arseny Kapoulkine
++ 1.34 (unknown)
++ use STBI_NOTUSED in stbi__resample_row_generic(), fix one more leak in tga failure case
++ 1.33 (2011-07-14)
++ make stbi_is_hdr work in STBI_NO_HDR (as specified), minor compiler-friendly improvements
++ 1.32 (2011-07-13)
++ support for "info" function for all supported filetypes (SpartanJ)
++ 1.31 (2011-06-20)
++ a few more leak fixes, bug in PNG handling (SpartanJ)
++ 1.30 (2011-06-11)
++ added ability to load files via callbacks to accomidate custom input streams (Ben Wenger)
++ removed deprecated format-specific test/load functions
++ removed support for installable file formats (stbi_loader) -- would have been broken for IO callbacks anyway
++ error cases in bmp and tga give messages and don't leak (Raymond Barbiero, grisha)
++ fix inefficiency in decoding 32-bit BMP (David Woo)
++ 1.29 (2010-08-16)
++ various warning fixes from Aurelien Pocheville
++ 1.28 (2010-08-01)
++ fix bug in GIF palette transparency (SpartanJ)
++ 1.27 (2010-08-01)
++ cast-to-stbi_uc to fix warnings
++ 1.26 (2010-07-24)
++ fix bug in file buffering for PNG reported by SpartanJ
++ 1.25 (2010-07-17)
++ refix trans_data warning (Won Chun)
++ 1.24 (2010-07-12)
++ perf improvements reading from files on platforms with lock-heavy fgetc()
++ minor perf improvements for jpeg
++ deprecated type-specific functions so we'll get feedback if they're needed
++ attempt to fix trans_data warning (Won Chun)
++ 1.23 fixed bug in iPhone support
++ 1.22 (2010-07-10)
++ removed image *writing* support
++ stbi_info support from Jetro Lauha
++ GIF support from Jean-Marc Lienher
++ iPhone PNG-extensions from James Brown
++ warning-fixes from Nicolas Schulz and Janez Zemva (i.stbi__err. Janez (U+017D)emva)
++ 1.21 fix use of 'stbi_uc' in header (reported by jon blow)
++ 1.20 added support for Softimage PIC, by Tom Seddon
++ 1.19 bug in interlaced PNG corruption check (found by ryg)
++ 1.18 (2008-08-02)
++ fix a threading bug (local mutable static)
++ 1.17 support interlaced PNG
++ 1.16 major bugfix - stbi__convert_format converted one too many pixels
++ 1.15 initialize some fields for thread safety
++ 1.14 fix threadsafe conversion bug
++ header-file-only version (#define STBI_HEADER_FILE_ONLY before including)
++ 1.13 threadsafe
++ 1.12 const qualifiers in the API
++ 1.11 Support installable IDCT, colorspace conversion routines
++ 1.10 Fixes for 64-bit (don't use "unsigned long")
++ optimized upsampling by Fabian "ryg" Giesen
++ 1.09 Fix format-conversion for PSD code (bad global variables!)
++ 1.08 Thatcher Ulrich's PSD code integrated by Nicolas Schulz
++ 1.07 attempt to fix C++ warning/errors again
++ 1.06 attempt to fix C++ warning/errors again
++ 1.05 fix TGA loading to return correct *comp and use good luminance calc
++ 1.04 default float alpha is 1, not 255; use 'void *' for stbi_image_free
++ 1.03 bugfixes to STBI_NO_STDIO, STBI_NO_HDR
++ 1.02 support for (subset of) HDR files, float interface for preferred access to them
++ 1.01 fix bug: possible bug in handling right-side up bmps... not sure
++ fix bug: the stbi__bmp_load() and stbi__tga_load() functions didn't work at all
++ 1.00 interface to zlib that skips zlib header
++ 0.99 correct handling of alpha in palette
++ 0.98 TGA loader by lonesock; dynamically add loaders (untested)
++ 0.97 jpeg errors on too large a file; also catch another malloc failure
++ 0.96 fix detection of invalid v value - particleman at mollyrocket forum
++ 0.95 during header scan, seek to markers in case of padding
++ 0.94 STBI_NO_STDIO to disable stdio usage; rename all #defines the same
++ 0.93 handle jpegtran output; verbose errors
++ 0.92 read 4,8,16,24,32-bit BMP files of several formats
++ 0.91 output 24-bit Windows 3.0 BMP files
++ 0.90 fix a few more warnings; bump version number to approach 1.0
++ 0.61 bugfixes due to Marc LeBlanc, Christopher Lloyd
++ 0.60 fix compiling as c++
++ 0.59 fix warnings: merge Dave Moore's -Wall fixes
++ 0.58 fix bug: zlib uncompressed mode len/nlen was wrong endian
++ 0.57 fix bug: jpg last huffman symbol before marker was >9 bits but less than 16 available
++ 0.56 fix bug: zlib uncompressed mode len vs. nlen
++ 0.55 fix bug: restart_interval not initialized to 0
++ 0.54 allow NULL for 'int *comp'
++ 0.53 fix bug in png 3->4; speedup png decoding
++ 0.52 png handles req_comp=3,4 directly; minor cleanup; jpeg comments
++ 0.51 obey req_comp requests, 1-component jpegs return as 1-component,
++ on 'test' only check type, not whether we support this variant
++ 0.50 (2006-11-19)
++ first released version
++*/
++
++
++/*
++------------------------------------------------------------------------------
++This software is available under 2 licenses -- choose whichever you prefer.
++------------------------------------------------------------------------------
++ALTERNATIVE A - MIT License
++Copyright (c) 2017 Sean Barrett
++Permission is hereby granted, free of charge, to any person obtaining a copy of
++this software and associated documentation files (the "Software"), to deal in
++the Software without restriction, including without limitation the rights to
++use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies
++of the Software, and to permit persons to whom the Software is furnished to do
++so, subject to the following conditions:
++The above copyright notice and this permission notice shall be included in all
++copies or substantial portions of the Software.
++THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
++IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
++FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
++AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
++LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
++OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
++SOFTWARE.
++------------------------------------------------------------------------------
++ALTERNATIVE B - Public Domain (www.unlicense.org)
++This is free and unencumbered software released into the public domain.
++Anyone is free to copy, modify, publish, use, compile, sell, or distribute this
++software, either in source code form or as a compiled binary, for any purpose,
++commercial or non-commercial, and by any means.
++In jurisdictions that recognize copyright laws, the author or authors of this
++software dedicate any and all copyright interest in the software to the public
++domain. We make this dedication for the benefit of the public at large and to
++the detriment of our heirs and successors. We intend this dedication to be an
++overt act of relinquishment in perpetuity of all present and future rights to
++this software under copyright law.
++THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
++IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
++FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
++AUTHORS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
++ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
++WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
++------------------------------------------------------------------------------
++*/
+diff --git a/src/drempels/stb_image_resize.h b/src/drempels/stb_image_resize.h
+new file mode 100644
+index 0000000..4f6ad35
+--- /dev/null
++++ b/src/drempels/stb_image_resize.h
+@@ -0,0 +1,2630 @@
++/* stb_image_resize - v0.96 - public domain image resizing
++ by Jorge L Rodriguez (@VinoBS) - 2014
++ http://github.com/nothings/stb
++
++ Written with emphasis on usability, portability, and efficiency. (No
++ SIMD or threads, so it be easily outperformed by libs that use those.)
++ Only scaling and translation is supported, no rotations or shears.
++ Easy API downsamples w/Mitchell filter, upsamples w/cubic interpolation.
++
++ COMPILING & LINKING
++ In one C/C++ file that #includes this file, do this:
++ #define STB_IMAGE_RESIZE_IMPLEMENTATION
++ before the #include. That will create the implementation in that file.
++
++ QUICKSTART
++ stbir_resize_uint8( input_pixels , in_w , in_h , 0,
++ output_pixels, out_w, out_h, 0, num_channels)
++ stbir_resize_float(...)
++ stbir_resize_uint8_srgb( input_pixels , in_w , in_h , 0,
++ output_pixels, out_w, out_h, 0,
++ num_channels , alpha_chan , 0)
++ stbir_resize_uint8_srgb_edgemode(
++ input_pixels , in_w , in_h , 0,
++ output_pixels, out_w, out_h, 0,
++ num_channels , alpha_chan , 0, STBIR_EDGE_CLAMP)
++ // WRAP/REFLECT/ZERO
++
++ FULL API
++ See the "header file" section of the source for API documentation.
++
++ ADDITIONAL DOCUMENTATION
++
++ SRGB & FLOATING POINT REPRESENTATION
++ The sRGB functions presume IEEE floating point. If you do not have
++ IEEE floating point, define STBIR_NON_IEEE_FLOAT. This will use
++ a slower implementation.
++
++ MEMORY ALLOCATION
++ The resize functions here perform a single memory allocation using
++ malloc. To control the memory allocation, before the #include that
++ triggers the implementation, do:
++
++ #define STBIR_MALLOC(size,context) ...
++ #define STBIR_FREE(ptr,context) ...
++
++ Each resize function makes exactly one call to malloc/free, so to use
++ temp memory, store the temp memory in the context and return that.
++
++ ASSERT
++ Define STBIR_ASSERT(boolval) to override assert() and not use assert.h
++
++ OPTIMIZATION
++ Define STBIR_SATURATE_INT to compute clamp values in-range using
++ integer operations instead of float operations. This may be faster
++ on some platforms.
++
++ DEFAULT FILTERS
++ For functions which don't provide explicit control over what filters
++ to use, you can change the compile-time defaults with
++
++ #define STBIR_DEFAULT_FILTER_UPSAMPLE STBIR_FILTER_something
++ #define STBIR_DEFAULT_FILTER_DOWNSAMPLE STBIR_FILTER_something
++
++ See stbir_filter in the header-file section for the list of filters.
++
++ NEW FILTERS
++ A number of 1D filter kernels are used. For a list of
++ supported filters see the stbir_filter enum. To add a new filter,
++ write a filter function and add it to stbir__filter_info_table.
++
++ PROGRESS
++ For interactive use with slow resize operations, you can install
++ a progress-report callback:
++
++ #define STBIR_PROGRESS_REPORT(val) some_func(val)
++
++ The parameter val is a float which goes from 0 to 1 as progress is made.
++
++ For example:
++
++ static void my_progress_report(float progress);
++ #define STBIR_PROGRESS_REPORT(val) my_progress_report(val)
++
++ #define STB_IMAGE_RESIZE_IMPLEMENTATION
++ #include "stb_image_resize.h"
++
++ static void my_progress_report(float progress)
++ {
++ printf("Progress: %f%%\n", progress*100);
++ }
++
++ MAX CHANNELS
++ If your image has more than 64 channels, define STBIR_MAX_CHANNELS
++ to the max you'll have.
++
++ ALPHA CHANNEL
++ Most of the resizing functions provide the ability to control how
++ the alpha channel of an image is processed. The important things
++ to know about this:
++
++ 1. The best mathematically-behaved version of alpha to use is
++ called "premultiplied alpha", in which the other color channels
++ have had the alpha value multiplied in. If you use premultiplied
++ alpha, linear filtering (such as image resampling done by this
++ library, or performed in texture units on GPUs) does the "right
++ thing". While premultiplied alpha is standard in the movie CGI
++ industry, it is still uncommon in the videogame/real-time world.
++
++ If you linearly filter non-premultiplied alpha, strange effects
++ occur. (For example, the 50/50 average of 99% transparent bright green
++ and 1% transparent black produces 50% transparent dark green when
++ non-premultiplied, whereas premultiplied it produces 50%
++ transparent near-black. The former introduces green energy
++ that doesn't exist in the source image.)
++
++ 2. Artists should not edit premultiplied-alpha images; artists
++ want non-premultiplied alpha images. Thus, art tools generally output
++ non-premultiplied alpha images.
++
++ 3. You will get best results in most cases by converting images
++ to premultiplied alpha before processing them mathematically.
++
++ 4. If you pass the flag STBIR_FLAG_ALPHA_PREMULTIPLIED, the
++ resizer does not do anything special for the alpha channel;
++ it is resampled identically to other channels. This produces
++ the correct results for premultiplied-alpha images, but produces
++ less-than-ideal results for non-premultiplied-alpha images.
++
++ 5. If you do not pass the flag STBIR_FLAG_ALPHA_PREMULTIPLIED,
++ then the resizer weights the contribution of input pixels
++ based on their alpha values, or, equivalently, it multiplies
++ the alpha value into the color channels, resamples, then divides
++ by the resultant alpha value. Input pixels which have alpha=0 do
++ not contribute at all to output pixels unless _all_ of the input
++ pixels affecting that output pixel have alpha=0, in which case
++ the result for that pixel is the same as it would be without
++ STBIR_FLAG_ALPHA_PREMULTIPLIED. However, this is only true for
++ input images in integer formats. For input images in float format,
++ input pixels with alpha=0 have no effect, and output pixels
++ which have alpha=0 will be 0 in all channels. (For float images,
++ you can manually achieve the same result by adding a tiny epsilon
++ value to the alpha channel of every image, and then subtracting
++ or clamping it at the end.)
++
++ 6. You can suppress the behavior described in #5 and make
++ all-0-alpha pixels have 0 in all channels by #defining
++ STBIR_NO_ALPHA_EPSILON.
++
++ 7. You can separately control whether the alpha channel is
++ interpreted as linear or affected by the colorspace. By default
++ it is linear; you almost never want to apply the colorspace.
++ (For example, graphics hardware does not apply sRGB conversion
++ to the alpha channel.)
++
++ CONTRIBUTORS
++ Jorge L Rodriguez: Implementation
++ Sean Barrett: API design, optimizations
++ Aras Pranckevicius: bugfix
++ Nathan Reed: warning fixes
++
++ REVISIONS
++ 0.96 (2019-03-04) fixed warnings
++ 0.95 (2017-07-23) fixed warnings
++ 0.94 (2017-03-18) fixed warnings
++ 0.93 (2017-03-03) fixed bug with certain combinations of heights
++ 0.92 (2017-01-02) fix integer overflow on large (>2GB) images
++ 0.91 (2016-04-02) fix warnings; fix handling of subpixel regions
++ 0.90 (2014-09-17) first released version
++
++ LICENSE
++ See end of file for license information.
++
++ TODO
++ Don't decode all of the image data when only processing a partial tile
++ Don't use full-width decode buffers when only processing a partial tile
++ When processing wide images, break processing into tiles so data fits in L1 cache
++ Installable filters?
++ Resize that respects alpha test coverage
++ (Reference code: FloatImage::alphaTestCoverage and FloatImage::scaleAlphaToCoverage:
++ https://code.google.com/p/nvidia-texture-tools/source/browse/trunk/src/nvimage/FloatImage.cpp )
++*/
++
++#ifndef STBIR_INCLUDE_STB_IMAGE_RESIZE_H
++#define STBIR_INCLUDE_STB_IMAGE_RESIZE_H
++
++#ifdef _MSC_VER
++typedef unsigned char stbir_uint8;
++typedef unsigned short stbir_uint16;
++typedef unsigned int stbir_uint32;
++#else
++#include <stdint.h>
++typedef uint8_t stbir_uint8;
++typedef uint16_t stbir_uint16;
++typedef uint32_t stbir_uint32;
++#endif
++
++#ifndef STBIRDEF
++#ifdef STB_IMAGE_RESIZE_STATIC
++#define STBIRDEF static
++#else
++#ifdef __cplusplus
++#define STBIRDEF extern "C"
++#else
++#define STBIRDEF extern
++#endif
++#endif
++#endif
++
++//////////////////////////////////////////////////////////////////////////////
++//
++// Easy-to-use API:
++//
++// * "input pixels" points to an array of image data with 'num_channels' channels (e.g. RGB=3, RGBA=4)
++// * input_w is input image width (x-axis), input_h is input image height (y-axis)
++// * stride is the offset between successive rows of image data in memory, in bytes. you can
++// specify 0 to mean packed continuously in memory
++// * alpha channel is treated identically to other channels.
++// * colorspace is linear or sRGB as specified by function name
++// * returned result is 1 for success or 0 in case of an error.
++// #define STBIR_ASSERT() to trigger an assert on parameter validation errors.
++// * Memory required grows approximately linearly with input and output size, but with
++// discontinuities at input_w == output_w and input_h == output_h.
++// * These functions use a "default" resampling filter defined at compile time. To change the filter,
++// you can change the compile-time defaults by #defining STBIR_DEFAULT_FILTER_UPSAMPLE
++// and STBIR_DEFAULT_FILTER_DOWNSAMPLE, or you can use the medium-complexity API.
++
++STBIRDEF int stbir_resize_uint8( const unsigned char *input_pixels , int input_w , int input_h , int input_stride_in_bytes,
++ unsigned char *output_pixels, int output_w, int output_h, int output_stride_in_bytes,
++ int num_channels);
++
++STBIRDEF int stbir_resize_float( const float *input_pixels , int input_w , int input_h , int input_stride_in_bytes,
++ float *output_pixels, int output_w, int output_h, int output_stride_in_bytes,
++ int num_channels);
++
++
++// The following functions interpret image data as gamma-corrected sRGB.
++// Specify STBIR_ALPHA_CHANNEL_NONE if you have no alpha channel,
++// or otherwise provide the index of the alpha channel. Flags value
++// of 0 will probably do the right thing if you're not sure what
++// the flags mean.
++
++#define STBIR_ALPHA_CHANNEL_NONE -1
++
++// Set this flag if your texture has premultiplied alpha. Otherwise, stbir will
++// use alpha-weighted resampling (effectively premultiplying, resampling,
++// then unpremultiplying).
++#define STBIR_FLAG_ALPHA_PREMULTIPLIED (1 << 0)
++// The specified alpha channel should be handled as gamma-corrected value even
++// when doing sRGB operations.
++#define STBIR_FLAG_ALPHA_USES_COLORSPACE (1 << 1)
++
++STBIRDEF int stbir_resize_uint8_srgb(const unsigned char *input_pixels , int input_w , int input_h , int input_stride_in_bytes,
++ unsigned char *output_pixels, int output_w, int output_h, int output_stride_in_bytes,
++ int num_channels, int alpha_channel, int flags);
++
++
++typedef enum
++{
++ STBIR_EDGE_CLAMP = 1,
++ STBIR_EDGE_REFLECT = 2,
++ STBIR_EDGE_WRAP = 3,
++ STBIR_EDGE_ZERO = 4,
++} stbir_edge;
++
++// This function adds the ability to specify how requests to sample off the edge of the image are handled.
++STBIRDEF int stbir_resize_uint8_srgb_edgemode(const unsigned char *input_pixels , int input_w , int input_h , int input_stride_in_bytes,
++ unsigned char *output_pixels, int output_w, int output_h, int output_stride_in_bytes,
++ int num_channels, int alpha_channel, int flags,
++ stbir_edge edge_wrap_mode);
++
++//////////////////////////////////////////////////////////////////////////////
++//
++// Medium-complexity API
++//
++// This extends the easy-to-use API as follows:
++//
++// * Alpha-channel can be processed separately
++// * If alpha_channel is not STBIR_ALPHA_CHANNEL_NONE
++// * Alpha channel will not be gamma corrected (unless flags&STBIR_FLAG_GAMMA_CORRECT)
++// * Filters will be weighted by alpha channel (unless flags&STBIR_FLAG_ALPHA_PREMULTIPLIED)
++// * Filter can be selected explicitly
++// * uint16 image type
++// * sRGB colorspace available for all types
++// * context parameter for passing to STBIR_MALLOC
++
++typedef enum
++{
++ STBIR_FILTER_DEFAULT = 0, // use same filter type that easy-to-use API chooses
++ STBIR_FILTER_BOX = 1, // A trapezoid w/1-pixel wide ramps, same result as box for integer scale ratios
++ STBIR_FILTER_TRIANGLE = 2, // On upsampling, produces same results as bilinear texture filtering
++ STBIR_FILTER_CUBICBSPLINE = 3, // The cubic b-spline (aka Mitchell-Netrevalli with B=1,C=0), gaussian-esque
++ STBIR_FILTER_CATMULLROM = 4, // An interpolating cubic spline
++ STBIR_FILTER_MITCHELL = 5, // Mitchell-Netrevalli filter with B=1/3, C=1/3
++} stbir_filter;
++
++typedef enum
++{
++ STBIR_COLORSPACE_LINEAR,
++ STBIR_COLORSPACE_SRGB,
++
++ STBIR_MAX_COLORSPACES,
++} stbir_colorspace;
++
++// The following functions are all identical except for the type of the image data
++
++STBIRDEF int stbir_resize_uint8_generic( const unsigned char *input_pixels , int input_w , int input_h , int input_stride_in_bytes,
++ unsigned char *output_pixels, int output_w, int output_h, int output_stride_in_bytes,
++ int num_channels, int alpha_channel, int flags,
++ stbir_edge edge_wrap_mode, stbir_filter filter, stbir_colorspace space,
++ void *alloc_context);
++
++STBIRDEF int stbir_resize_uint16_generic(const stbir_uint16 *input_pixels , int input_w , int input_h , int input_stride_in_bytes,
++ stbir_uint16 *output_pixels , int output_w, int output_h, int output_stride_in_bytes,
++ int num_channels, int alpha_channel, int flags,
++ stbir_edge edge_wrap_mode, stbir_filter filter, stbir_colorspace space,
++ void *alloc_context);
++
++STBIRDEF int stbir_resize_float_generic( const float *input_pixels , int input_w , int input_h , int input_stride_in_bytes,
++ float *output_pixels , int output_w, int output_h, int output_stride_in_bytes,
++ int num_channels, int alpha_channel, int flags,
++ stbir_edge edge_wrap_mode, stbir_filter filter, stbir_colorspace space,
++ void *alloc_context);
++
++
++
++//////////////////////////////////////////////////////////////////////////////
++//
++// Full-complexity API
++//
++// This extends the medium API as follows:
++//
++// * uint32 image type
++// * not typesafe
++// * separate filter types for each axis
++// * separate edge modes for each axis
++// * can specify scale explicitly for subpixel correctness
++// * can specify image source tile using texture coordinates
++
++typedef enum
++{
++ STBIR_TYPE_UINT8 ,
++ STBIR_TYPE_UINT16,
++ STBIR_TYPE_UINT32,
++ STBIR_TYPE_FLOAT ,
++
++ STBIR_MAX_TYPES
++} stbir_datatype;
++
++STBIRDEF int stbir_resize( const void *input_pixels , int input_w , int input_h , int input_stride_in_bytes,
++ void *output_pixels, int output_w, int output_h, int output_stride_in_bytes,
++ stbir_datatype datatype,
++ int num_channels, int alpha_channel, int flags,
++ stbir_edge edge_mode_horizontal, stbir_edge edge_mode_vertical,
++ stbir_filter filter_horizontal, stbir_filter filter_vertical,
++ stbir_colorspace space, void *alloc_context);
++
++STBIRDEF int stbir_resize_subpixel(const void *input_pixels , int input_w , int input_h , int input_stride_in_bytes,
++ void *output_pixels, int output_w, int output_h, int output_stride_in_bytes,
++ stbir_datatype datatype,
++ int num_channels, int alpha_channel, int flags,
++ stbir_edge edge_mode_horizontal, stbir_edge edge_mode_vertical,
++ stbir_filter filter_horizontal, stbir_filter filter_vertical,
++ stbir_colorspace space, void *alloc_context,
++ float x_scale, float y_scale,
++ float x_offset, float y_offset);
++
++STBIRDEF int stbir_resize_region( const void *input_pixels , int input_w , int input_h , int input_stride_in_bytes,
++ void *output_pixels, int output_w, int output_h, int output_stride_in_bytes,
++ stbir_datatype datatype,
++ int num_channels, int alpha_channel, int flags,
++ stbir_edge edge_mode_horizontal, stbir_edge edge_mode_vertical,
++ stbir_filter filter_horizontal, stbir_filter filter_vertical,
++ stbir_colorspace space, void *alloc_context,
++ float s0, float t0, float s1, float t1);
++// (s0, t0) & (s1, t1) are the top-left and bottom right corner (uv addressing style: [0, 1]x[0, 1]) of a region of the input image to use.
++
++//
++//
++//// end header file /////////////////////////////////////////////////////
++#endif // STBIR_INCLUDE_STB_IMAGE_RESIZE_H
++
++
++
++
++
++#ifdef STB_IMAGE_RESIZE_IMPLEMENTATION
++
++#ifndef STBIR_ASSERT
++#include <assert.h>
++#define STBIR_ASSERT(x) assert(x)
++#endif
++
++// For memset
++#include <string.h>
++
++#include <math.h>
++
++#ifndef STBIR_MALLOC
++#include <stdlib.h>
++// use comma operator to evaluate c, to avoid "unused parameter" warnings
++#define STBIR_MALLOC(size,c) ((void)(c), malloc(size))
++#define STBIR_FREE(ptr,c) ((void)(c), free(ptr))
++#endif
++
++#ifndef _MSC_VER
++#ifdef __cplusplus
++#define stbir__inline inline
++#else
++#define stbir__inline
++#endif
++#else
++#define stbir__inline __forceinline
++#endif
++
++
++// should produce compiler error if size is wrong
++typedef unsigned char stbir__validate_uint32[sizeof(stbir_uint32) == 4 ? 1 : -1];
++
++#ifdef _MSC_VER
++#define STBIR__NOTUSED(v) (void)(v)
++#else
++#define STBIR__NOTUSED(v) (void)sizeof(v)
++#endif
++
++#define STBIR__ARRAY_SIZE(a) (sizeof((a))/sizeof((a)[0]))
++
++#ifndef STBIR_DEFAULT_FILTER_UPSAMPLE
++#define STBIR_DEFAULT_FILTER_UPSAMPLE STBIR_FILTER_CATMULLROM
++#endif
++
++#ifndef STBIR_DEFAULT_FILTER_DOWNSAMPLE
++#define STBIR_DEFAULT_FILTER_DOWNSAMPLE STBIR_FILTER_MITCHELL
++#endif
++
++#ifndef STBIR_PROGRESS_REPORT
++#define STBIR_PROGRESS_REPORT(float_0_to_1)
++#endif
++
++#ifndef STBIR_MAX_CHANNELS
++#define STBIR_MAX_CHANNELS 64
++#endif
++
++#if STBIR_MAX_CHANNELS > 65536
++#error "Too many channels; STBIR_MAX_CHANNELS must be no more than 65536."
++// because we store the indices in 16-bit variables
++#endif
++
++// This value is added to alpha just before premultiplication to avoid
++// zeroing out color values. It is equivalent to 2^-80. If you don't want
++// that behavior (it may interfere if you have floating point images with
++// very small alpha values) then you can define STBIR_NO_ALPHA_EPSILON to
++// disable it.
++#ifndef STBIR_ALPHA_EPSILON
++#define STBIR_ALPHA_EPSILON ((float)1 / (1 << 20) / (1 << 20) / (1 << 20) / (1 << 20))
++#endif
++
++
++
++#ifdef _MSC_VER
++#define STBIR__UNUSED_PARAM(v) (void)(v)
++#else
++#define STBIR__UNUSED_PARAM(v) (void)sizeof(v)
++#endif
++
++// must match stbir_datatype
++static unsigned char stbir__type_size[] = {
++ 1, // STBIR_TYPE_UINT8
++ 2, // STBIR_TYPE_UINT16
++ 4, // STBIR_TYPE_UINT32
++ 4, // STBIR_TYPE_FLOAT
++};
++
++// Kernel function centered at 0
++typedef float (stbir__kernel_fn)(float x, float scale);
++typedef float (stbir__support_fn)(float scale);
++
++typedef struct
++{
++ stbir__kernel_fn* kernel;
++ stbir__support_fn* support;
++} stbir__filter_info;
++
++// When upsampling, the contributors are which source pixels contribute.
++// When downsampling, the contributors are which destination pixels are contributed to.
++typedef struct
++{
++ int n0; // First contributing pixel
++ int n1; // Last contributing pixel
++} stbir__contributors;
++
++typedef struct
++{
++ const void* input_data;
++ int input_w;
++ int input_h;
++ int input_stride_bytes;
++
++ void* output_data;
++ int output_w;
++ int output_h;
++ int output_stride_bytes;
++
++ float s0, t0, s1, t1;
++
++ float horizontal_shift; // Units: output pixels
++ float vertical_shift; // Units: output pixels
++ float horizontal_scale;
++ float vertical_scale;
++
++ int channels;
++ int alpha_channel;
++ stbir_uint32 flags;
++ stbir_datatype type;
++ stbir_filter horizontal_filter;
++ stbir_filter vertical_filter;
++ stbir_edge edge_horizontal;
++ stbir_edge edge_vertical;
++ stbir_colorspace colorspace;
++
++ stbir__contributors* horizontal_contributors;
++ float* horizontal_coefficients;
++
++ stbir__contributors* vertical_contributors;
++ float* vertical_coefficients;
++
++ int decode_buffer_pixels;
++ float* decode_buffer;
++
++ float* horizontal_buffer;
++
++ // cache these because ceil/floor are inexplicably showing up in profile
++ int horizontal_coefficient_width;
++ int vertical_coefficient_width;
++ int horizontal_filter_pixel_width;
++ int vertical_filter_pixel_width;
++ int horizontal_filter_pixel_margin;
++ int vertical_filter_pixel_margin;
++ int horizontal_num_contributors;
++ int vertical_num_contributors;
++
++ int ring_buffer_length_bytes; // The length of an individual entry in the ring buffer. The total number of ring buffers is stbir__get_filter_pixel_width(filter)
++ int ring_buffer_num_entries; // Total number of entries in the ring buffer.
++ int ring_buffer_first_scanline;
++ int ring_buffer_last_scanline;
++ int ring_buffer_begin_index; // first_scanline is at this index in the ring buffer
++ float* ring_buffer;
++
++ float* encode_buffer; // A temporary buffer to store floats so we don't lose precision while we do multiply-adds.
++
++ int horizontal_contributors_size;
++ int horizontal_coefficients_size;
++ int vertical_contributors_size;
++ int vertical_coefficients_size;
++ int decode_buffer_size;
++ int horizontal_buffer_size;
++ int ring_buffer_size;
++ int encode_buffer_size;
++} stbir__info;
++
++
++static const float stbir__max_uint8_as_float = 255.0f;
++static const float stbir__max_uint16_as_float = 65535.0f;
++static const double stbir__max_uint32_as_float = 4294967295.0;
++
++
++static stbir__inline int stbir__min(int a, int b)
++{
++ return a < b ? a : b;
++}
++
++static stbir__inline float stbir__saturate(float x)
++{
++ if (x < 0)
++ return 0;
++
++ if (x > 1)
++ return 1;
++
++ return x;
++}
++
++#ifdef STBIR_SATURATE_INT
++static stbir__inline stbir_uint8 stbir__saturate8(int x)
++{
++ if ((unsigned int) x <= 255)
++ return x;
++
++ if (x < 0)
++ return 0;
++
++ return 255;
++}
++
++static stbir__inline stbir_uint16 stbir__saturate16(int x)
++{
++ if ((unsigned int) x <= 65535)
++ return x;
++
++ if (x < 0)
++ return 0;
++
++ return 65535;
++}
++#endif
++
++static float stbir__srgb_uchar_to_linear_float[256] = {
++ 0.000000f, 0.000304f, 0.000607f, 0.000911f, 0.001214f, 0.001518f, 0.001821f, 0.002125f, 0.002428f, 0.002732f, 0.003035f,
++ 0.003347f, 0.003677f, 0.004025f, 0.004391f, 0.004777f, 0.005182f, 0.005605f, 0.006049f, 0.006512f, 0.006995f, 0.007499f,
++ 0.008023f, 0.008568f, 0.009134f, 0.009721f, 0.010330f, 0.010960f, 0.011612f, 0.012286f, 0.012983f, 0.013702f, 0.014444f,
++ 0.015209f, 0.015996f, 0.016807f, 0.017642f, 0.018500f, 0.019382f, 0.020289f, 0.021219f, 0.022174f, 0.023153f, 0.024158f,
++ 0.025187f, 0.026241f, 0.027321f, 0.028426f, 0.029557f, 0.030713f, 0.031896f, 0.033105f, 0.034340f, 0.035601f, 0.036889f,
++ 0.038204f, 0.039546f, 0.040915f, 0.042311f, 0.043735f, 0.045186f, 0.046665f, 0.048172f, 0.049707f, 0.051269f, 0.052861f,
++ 0.054480f, 0.056128f, 0.057805f, 0.059511f, 0.061246f, 0.063010f, 0.064803f, 0.066626f, 0.068478f, 0.070360f, 0.072272f,
++ 0.074214f, 0.076185f, 0.078187f, 0.080220f, 0.082283f, 0.084376f, 0.086500f, 0.088656f, 0.090842f, 0.093059f, 0.095307f,
++ 0.097587f, 0.099899f, 0.102242f, 0.104616f, 0.107023f, 0.109462f, 0.111932f, 0.114435f, 0.116971f, 0.119538f, 0.122139f,
++ 0.124772f, 0.127438f, 0.130136f, 0.132868f, 0.135633f, 0.138432f, 0.141263f, 0.144128f, 0.147027f, 0.149960f, 0.152926f,
++ 0.155926f, 0.158961f, 0.162029f, 0.165132f, 0.168269f, 0.171441f, 0.174647f, 0.177888f, 0.181164f, 0.184475f, 0.187821f,
++ 0.191202f, 0.194618f, 0.198069f, 0.201556f, 0.205079f, 0.208637f, 0.212231f, 0.215861f, 0.219526f, 0.223228f, 0.226966f,
++ 0.230740f, 0.234551f, 0.238398f, 0.242281f, 0.246201f, 0.250158f, 0.254152f, 0.258183f, 0.262251f, 0.266356f, 0.270498f,
++ 0.274677f, 0.278894f, 0.283149f, 0.287441f, 0.291771f, 0.296138f, 0.300544f, 0.304987f, 0.309469f, 0.313989f, 0.318547f,
++ 0.323143f, 0.327778f, 0.332452f, 0.337164f, 0.341914f, 0.346704f, 0.351533f, 0.356400f, 0.361307f, 0.366253f, 0.371238f,
++ 0.376262f, 0.381326f, 0.386430f, 0.391573f, 0.396755f, 0.401978f, 0.407240f, 0.412543f, 0.417885f, 0.423268f, 0.428691f,
++ 0.434154f, 0.439657f, 0.445201f, 0.450786f, 0.456411f, 0.462077f, 0.467784f, 0.473532f, 0.479320f, 0.485150f, 0.491021f,
++ 0.496933f, 0.502887f, 0.508881f, 0.514918f, 0.520996f, 0.527115f, 0.533276f, 0.539480f, 0.545725f, 0.552011f, 0.558340f,
++ 0.564712f, 0.571125f, 0.577581f, 0.584078f, 0.590619f, 0.597202f, 0.603827f, 0.610496f, 0.617207f, 0.623960f, 0.630757f,
++ 0.637597f, 0.644480f, 0.651406f, 0.658375f, 0.665387f, 0.672443f, 0.679543f, 0.686685f, 0.693872f, 0.701102f, 0.708376f,
++ 0.715694f, 0.723055f, 0.730461f, 0.737911f, 0.745404f, 0.752942f, 0.760525f, 0.768151f, 0.775822f, 0.783538f, 0.791298f,
++ 0.799103f, 0.806952f, 0.814847f, 0.822786f, 0.830770f, 0.838799f, 0.846873f, 0.854993f, 0.863157f, 0.871367f, 0.879622f,
++ 0.887923f, 0.896269f, 0.904661f, 0.913099f, 0.921582f, 0.930111f, 0.938686f, 0.947307f, 0.955974f, 0.964686f, 0.973445f,
++ 0.982251f, 0.991102f, 1.0f
++};
++
++static float stbir__srgb_to_linear(float f)
++{
++ if (f <= 0.04045f)
++ return f / 12.92f;
++ else
++ return (float)pow((f + 0.055f) / 1.055f, 2.4f);
++}
++
++static float stbir__linear_to_srgb(float f)
++{
++ if (f <= 0.0031308f)
++ return f * 12.92f;
++ else
++ return 1.055f * (float)pow(f, 1 / 2.4f) - 0.055f;
++}
++
++#ifndef STBIR_NON_IEEE_FLOAT
++// From https://gist.github.com/rygorous/2203834
++
++typedef union
++{
++ stbir_uint32 u;
++ float f;
++} stbir__FP32;
++
++static const stbir_uint32 fp32_to_srgb8_tab4[104] = {
++ 0x0073000d, 0x007a000d, 0x0080000d, 0x0087000d, 0x008d000d, 0x0094000d, 0x009a000d, 0x00a1000d,
++ 0x00a7001a, 0x00b4001a, 0x00c1001a, 0x00ce001a, 0x00da001a, 0x00e7001a, 0x00f4001a, 0x0101001a,
++ 0x010e0033, 0x01280033, 0x01410033, 0x015b0033, 0x01750033, 0x018f0033, 0x01a80033, 0x01c20033,
++ 0x01dc0067, 0x020f0067, 0x02430067, 0x02760067, 0x02aa0067, 0x02dd0067, 0x03110067, 0x03440067,
++ 0x037800ce, 0x03df00ce, 0x044600ce, 0x04ad00ce, 0x051400ce, 0x057b00c5, 0x05dd00bc, 0x063b00b5,
++ 0x06970158, 0x07420142, 0x07e30130, 0x087b0120, 0x090b0112, 0x09940106, 0x0a1700fc, 0x0a9500f2,
++ 0x0b0f01cb, 0x0bf401ae, 0x0ccb0195, 0x0d950180, 0x0e56016e, 0x0f0d015e, 0x0fbc0150, 0x10630143,
++ 0x11070264, 0x1238023e, 0x1357021d, 0x14660201, 0x156601e9, 0x165a01d3, 0x174401c0, 0x182401af,
++ 0x18fe0331, 0x1a9602fe, 0x1c1502d2, 0x1d7e02ad, 0x1ed4028d, 0x201a0270, 0x21520256, 0x227d0240,
++ 0x239f0443, 0x25c003fe, 0x27bf03c4, 0x29a10392, 0x2b6a0367, 0x2d1d0341, 0x2ebe031f, 0x304d0300,
++ 0x31d105b0, 0x34a80555, 0x37520507, 0x39d504c5, 0x3c37048b, 0x3e7c0458, 0x40a8042a, 0x42bd0401,
++ 0x44c20798, 0x488e071e, 0x4c1c06b6, 0x4f76065d, 0x52a50610, 0x55ac05cc, 0x5892058f, 0x5b590559,
++ 0x5e0c0a23, 0x631c0980, 0x67db08f6, 0x6c55087f, 0x70940818, 0x74a007bd, 0x787d076c, 0x7c330723,
++};
++
++static stbir_uint8 stbir__linear_to_srgb_uchar(float in)
++{
++ static const stbir__FP32 almostone = { 0x3f7fffff }; // 1-eps
++ static const stbir__FP32 minval = { (127-13) << 23 };
++ stbir_uint32 tab,bias,scale,t;
++ stbir__FP32 f;
++
++ // Clamp to [2^(-13), 1-eps]; these two values map to 0 and 1, respectively.
++ // The tests are carefully written so that NaNs map to 0, same as in the reference
++ // implementation.
++ if (!(in > minval.f)) // written this way to catch NaNs
++ in = minval.f;
++ if (in > almostone.f)
++ in = almostone.f;
++
++ // Do the table lookup and unpack bias, scale
++ f.f = in;
++ tab = fp32_to_srgb8_tab4[(f.u - minval.u) >> 20];
++ bias = (tab >> 16) << 9;
++ scale = tab & 0xffff;
++
++ // Grab next-highest mantissa bits and perform linear interpolation
++ t = (f.u >> 12) & 0xff;
++ return (unsigned char) ((bias + scale*t) >> 16);
++}
++
++#else
++// sRGB transition values, scaled by 1<<28
++static int stbir__srgb_offset_to_linear_scaled[256] =
++{
++ 0, 40738, 122216, 203693, 285170, 366648, 448125, 529603,
++ 611080, 692557, 774035, 855852, 942009, 1033024, 1128971, 1229926,
++ 1335959, 1447142, 1563542, 1685229, 1812268, 1944725, 2082664, 2226148,
++ 2375238, 2529996, 2690481, 2856753, 3028870, 3206888, 3390865, 3580856,
++ 3776916, 3979100, 4187460, 4402049, 4622919, 4850123, 5083710, 5323731,
++ 5570236, 5823273, 6082892, 6349140, 6622065, 6901714, 7188133, 7481369,
++ 7781466, 8088471, 8402427, 8723380, 9051372, 9386448, 9728650, 10078021,
++ 10434603, 10798439, 11169569, 11548036, 11933879, 12327139, 12727857, 13136073,
++ 13551826, 13975156, 14406100, 14844697, 15290987, 15745007, 16206795, 16676389,
++ 17153826, 17639142, 18132374, 18633560, 19142734, 19659934, 20185196, 20718552,
++ 21260042, 21809696, 22367554, 22933648, 23508010, 24090680, 24681686, 25281066,
++ 25888850, 26505076, 27129772, 27762974, 28404716, 29055026, 29713942, 30381490,
++ 31057708, 31742624, 32436272, 33138682, 33849884, 34569912, 35298800, 36036568,
++ 36783260, 37538896, 38303512, 39077136, 39859796, 40651528, 41452360, 42262316,
++ 43081432, 43909732, 44747252, 45594016, 46450052, 47315392, 48190064, 49074096,
++ 49967516, 50870356, 51782636, 52704392, 53635648, 54576432, 55526772, 56486700,
++ 57456236, 58435408, 59424248, 60422780, 61431036, 62449032, 63476804, 64514376,
++ 65561776, 66619028, 67686160, 68763192, 69850160, 70947088, 72053992, 73170912,
++ 74297864, 75434880, 76581976, 77739184, 78906536, 80084040, 81271736, 82469648,
++ 83677792, 84896192, 86124888, 87363888, 88613232, 89872928, 91143016, 92423512,
++ 93714432, 95015816, 96327688, 97650056, 98982952, 100326408, 101680440, 103045072,
++ 104420320, 105806224, 107202800, 108610064, 110028048, 111456776, 112896264, 114346544,
++ 115807632, 117279552, 118762328, 120255976, 121760536, 123276016, 124802440, 126339832,
++ 127888216, 129447616, 131018048, 132599544, 134192112, 135795792, 137410592, 139036528,
++ 140673648, 142321952, 143981456, 145652208, 147334208, 149027488, 150732064, 152447968,
++ 154175200, 155913792, 157663776, 159425168, 161197984, 162982240, 164777968, 166585184,
++ 168403904, 170234160, 172075968, 173929344, 175794320, 177670896, 179559120, 181458992,
++ 183370528, 185293776, 187228736, 189175424, 191133888, 193104112, 195086128, 197079968,
++ 199085648, 201103184, 203132592, 205173888, 207227120, 209292272, 211369392, 213458480,
++ 215559568, 217672656, 219797792, 221934976, 224084240, 226245600, 228419056, 230604656,
++ 232802400, 235012320, 237234432, 239468736, 241715280, 243974080, 246245120, 248528464,
++ 250824112, 253132064, 255452368, 257785040, 260130080, 262487520, 264857376, 267239664,
++};
++
++static stbir_uint8 stbir__linear_to_srgb_uchar(float f)
++{
++ int x = (int) (f * (1 << 28)); // has headroom so you don't need to clamp
++ int v = 0;
++ int i;
++
++ // Refine the guess with a short binary search.
++ i = v + 128; if (x >= stbir__srgb_offset_to_linear_scaled[i]) v = i;
++ i = v + 64; if (x >= stbir__srgb_offset_to_linear_scaled[i]) v = i;
++ i = v + 32; if (x >= stbir__srgb_offset_to_linear_scaled[i]) v = i;
++ i = v + 16; if (x >= stbir__srgb_offset_to_linear_scaled[i]) v = i;
++ i = v + 8; if (x >= stbir__srgb_offset_to_linear_scaled[i]) v = i;
++ i = v + 4; if (x >= stbir__srgb_offset_to_linear_scaled[i]) v = i;
++ i = v + 2; if (x >= stbir__srgb_offset_to_linear_scaled[i]) v = i;
++ i = v + 1; if (x >= stbir__srgb_offset_to_linear_scaled[i]) v = i;
++
++ return (stbir_uint8) v;
++}
++#endif
++
++static float stbir__filter_trapezoid(float x, float scale)
++{
++ float halfscale = scale / 2;
++ float t = 0.5f + halfscale;
++ STBIR_ASSERT(scale <= 1);
++
++ x = (float)fabs(x);
++
++ if (x >= t)
++ return 0;
++ else
++ {
++ float r = 0.5f - halfscale;
++ if (x <= r)
++ return 1;
++ else
++ return (t - x) / scale;
++ }
++}
++
++static float stbir__support_trapezoid(float scale)
++{
++ STBIR_ASSERT(scale <= 1);
++ return 0.5f + scale / 2;
++}
++
++static float stbir__filter_triangle(float x, float s)
++{
++ STBIR__UNUSED_PARAM(s);
++
++ x = (float)fabs(x);
++
++ if (x <= 1.0f)
++ return 1 - x;
++ else
++ return 0;
++}
++
++static float stbir__filter_cubic(float x, float s)
++{
++ STBIR__UNUSED_PARAM(s);
++
++ x = (float)fabs(x);
++
++ if (x < 1.0f)
++ return (4 + x*x*(3*x - 6))/6;
++ else if (x < 2.0f)
++ return (8 + x*(-12 + x*(6 - x)))/6;
++
++ return (0.0f);
++}
++
++static float stbir__filter_catmullrom(float x, float s)
++{
++ STBIR__UNUSED_PARAM(s);
++
++ x = (float)fabs(x);
++
++ if (x < 1.0f)
++ return 1 - x*x*(2.5f - 1.5f*x);
++ else if (x < 2.0f)
++ return 2 - x*(4 + x*(0.5f*x - 2.5f));
++
++ return (0.0f);
++}
++
++static float stbir__filter_mitchell(float x, float s)
++{
++ STBIR__UNUSED_PARAM(s);
++
++ x = (float)fabs(x);
++
++ if (x < 1.0f)
++ return (16 + x*x*(21 * x - 36))/18;
++ else if (x < 2.0f)
++ return (32 + x*(-60 + x*(36 - 7*x)))/18;
++
++ return (0.0f);
++}
++
++static float stbir__support_zero(float s)
++{
++ STBIR__UNUSED_PARAM(s);
++ return 0;
++}
++
++static float stbir__support_one(float s)
++{
++ STBIR__UNUSED_PARAM(s);
++ return 1;
++}
++
++static float stbir__support_two(float s)
++{
++ STBIR__UNUSED_PARAM(s);
++ return 2;
++}
++
++static stbir__filter_info stbir__filter_info_table[] = {
++ { NULL, stbir__support_zero },
++ { stbir__filter_trapezoid, stbir__support_trapezoid },
++ { stbir__filter_triangle, stbir__support_one },
++ { stbir__filter_cubic, stbir__support_two },
++ { stbir__filter_catmullrom, stbir__support_two },
++ { stbir__filter_mitchell, stbir__support_two },
++};
++
++stbir__inline static int stbir__use_upsampling(float ratio)
++{
++ return ratio > 1;
++}
++
++stbir__inline static int stbir__use_width_upsampling(stbir__info* stbir_info)
++{
++ return stbir__use_upsampling(stbir_info->horizontal_scale);
++}
++
++stbir__inline static int stbir__use_height_upsampling(stbir__info* stbir_info)
++{
++ return stbir__use_upsampling(stbir_info->vertical_scale);
++}
++
++// This is the maximum number of input samples that can affect an output sample
++// with the given filter
++static int stbir__get_filter_pixel_width(stbir_filter filter, float scale)
++{
++ STBIR_ASSERT(filter != 0);
++ STBIR_ASSERT(filter < STBIR__ARRAY_SIZE(stbir__filter_info_table));
++
++ if (stbir__use_upsampling(scale))
++ return (int)ceil(stbir__filter_info_table[filter].support(1/scale) * 2);
++ else
++ return (int)ceil(stbir__filter_info_table[filter].support(scale) * 2 / scale);
++}
++
++// This is how much to expand buffers to account for filters seeking outside
++// the image boundaries.
++static int stbir__get_filter_pixel_margin(stbir_filter filter, float scale)
++{
++ return stbir__get_filter_pixel_width(filter, scale) / 2;
++}
++
++static int stbir__get_coefficient_width(stbir_filter filter, float scale)
++{
++ if (stbir__use_upsampling(scale))
++ return (int)ceil(stbir__filter_info_table[filter].support(1 / scale) * 2);
++ else
++ return (int)ceil(stbir__filter_info_table[filter].support(scale) * 2);
++}
++
++static int stbir__get_contributors(float scale, stbir_filter filter, int input_size, int output_size)
++{
++ if (stbir__use_upsampling(scale))
++ return output_size;
++ else
++ return (input_size + stbir__get_filter_pixel_margin(filter, scale) * 2);
++}
++
++static int stbir__get_total_horizontal_coefficients(stbir__info* info)
++{
++ return info->horizontal_num_contributors
++ * stbir__get_coefficient_width (info->horizontal_filter, info->horizontal_scale);
++}
++
++static int stbir__get_total_vertical_coefficients(stbir__info* info)
++{
++ return info->vertical_num_contributors
++ * stbir__get_coefficient_width (info->vertical_filter, info->vertical_scale);
++}
++
++static stbir__contributors* stbir__get_contributor(stbir__contributors* contributors, int n)
++{
++ return &contributors[n];
++}
++
++// For perf reasons this code is duplicated in stbir__resample_horizontal_upsample/downsample,
++// if you change it here change it there too.
++static float* stbir__get_coefficient(float* coefficients, stbir_filter filter, float scale, int n, int c)
++{
++ int width = stbir__get_coefficient_width(filter, scale);
++ return &coefficients[width*n + c];
++}
++
++static int stbir__edge_wrap_slow(stbir_edge edge, int n, int max)
++{
++ switch (edge)
++ {
++ case STBIR_EDGE_ZERO:
++ return 0; // we'll decode the wrong pixel here, and then overwrite with 0s later
++
++ case STBIR_EDGE_CLAMP:
++ if (n < 0)
++ return 0;
++
++ if (n >= max)
++ return max - 1;
++
++ return n; // NOTREACHED
++
++ case STBIR_EDGE_REFLECT:
++ {
++ if (n < 0)
++ {
++ if (n < max)
++ return -n;
++ else
++ return max - 1;
++ }
++
++ if (n >= max)
++ {
++ int max2 = max * 2;
++ if (n >= max2)
++ return 0;
++ else
++ return max2 - n - 1;
++ }
++
++ return n; // NOTREACHED
++ }
++
++ case STBIR_EDGE_WRAP:
++ if (n >= 0)
++ return (n % max);
++ else
++ {
++ int m = (-n) % max;
++
++ if (m != 0)
++ m = max - m;
++
++ return (m);
++ }
++ // NOTREACHED
++
++ default:
++ STBIR_ASSERT(!"Unimplemented edge type");
++ return 0;
++ }
++}
++
++stbir__inline static int stbir__edge_wrap(stbir_edge edge, int n, int max)
++{
++ // avoid per-pixel switch
++ if (n >= 0 && n < max)
++ return n;
++ return stbir__edge_wrap_slow(edge, n, max);
++}
++
++// What input pixels contribute to this output pixel?
++static void stbir__calculate_sample_range_upsample(int n, float out_filter_radius, float scale_ratio, float out_shift, int* in_first_pixel, int* in_last_pixel, float* in_center_of_out)
++{
++ float out_pixel_center = (float)n + 0.5f;
++ float out_pixel_influence_lowerbound = out_pixel_center - out_filter_radius;
++ float out_pixel_influence_upperbound = out_pixel_center + out_filter_radius;
++
++ float in_pixel_influence_lowerbound = (out_pixel_influence_lowerbound + out_shift) / scale_ratio;
++ float in_pixel_influence_upperbound = (out_pixel_influence_upperbound + out_shift) / scale_ratio;
++
++ *in_center_of_out = (out_pixel_center + out_shift) / scale_ratio;
++ *in_first_pixel = (int)(floor(in_pixel_influence_lowerbound + 0.5));
++ *in_last_pixel = (int)(floor(in_pixel_influence_upperbound - 0.5));
++}
++
++// What output pixels does this input pixel contribute to?
++static void stbir__calculate_sample_range_downsample(int n, float in_pixels_radius, float scale_ratio, float out_shift, int* out_first_pixel, int* out_last_pixel, float* out_center_of_in)
++{
++ float in_pixel_center = (float)n + 0.5f;
++ float in_pixel_influence_lowerbound = in_pixel_center - in_pixels_radius;
++ float in_pixel_influence_upperbound = in_pixel_center + in_pixels_radius;
++
++ float out_pixel_influence_lowerbound = in_pixel_influence_lowerbound * scale_ratio - out_shift;
++ float out_pixel_influence_upperbound = in_pixel_influence_upperbound * scale_ratio - out_shift;
++
++ *out_center_of_in = in_pixel_center * scale_ratio - out_shift;
++ *out_first_pixel = (int)(floor(out_pixel_influence_lowerbound + 0.5));
++ *out_last_pixel = (int)(floor(out_pixel_influence_upperbound - 0.5));
++}
++
++static void stbir__calculate_coefficients_upsample(stbir_filter filter, float scale, int in_first_pixel, int in_last_pixel, float in_center_of_out, stbir__contributors* contributor, float* coefficient_group)
++{
++ int i;
++ float total_filter = 0;
++ float filter_scale;
++
++ STBIR_ASSERT(in_last_pixel - in_first_pixel <= (int)ceil(stbir__filter_info_table[filter].support(1/scale) * 2)); // Taken directly from stbir__get_coefficient_width() which we can't call because we don't know if we're horizontal or vertical.
++
++ contributor->n0 = in_first_pixel;
++ contributor->n1 = in_last_pixel;
++
++ STBIR_ASSERT(contributor->n1 >= contributor->n0);
++
++ for (i = 0; i <= in_last_pixel - in_first_pixel; i++)
++ {
++ float in_pixel_center = (float)(i + in_first_pixel) + 0.5f;
++ coefficient_group[i] = stbir__filter_info_table[filter].kernel(in_center_of_out - in_pixel_center, 1 / scale);
++
++ // If the coefficient is zero, skip it. (Don't do the <0 check here, we want the influence of those outside pixels.)
++ if (i == 0 && !coefficient_group[i])
++ {
++ contributor->n0 = ++in_first_pixel;
++ i--;
++ continue;
++ }
++
++ total_filter += coefficient_group[i];
++ }
++
++ STBIR_ASSERT(stbir__filter_info_table[filter].kernel((float)(in_last_pixel + 1) + 0.5f - in_center_of_out, 1/scale) == 0);
++
++ STBIR_ASSERT(total_filter > 0.9);
++ STBIR_ASSERT(total_filter < 1.1f); // Make sure it's not way off.
++
++ // Make sure the sum of all coefficients is 1.
++ filter_scale = 1 / total_filter;
++
++ for (i = 0; i <= in_last_pixel - in_first_pixel; i++)
++ coefficient_group[i] *= filter_scale;
++
++ for (i = in_last_pixel - in_first_pixel; i >= 0; i--)
++ {
++ if (coefficient_group[i])
++ break;
++
++ // This line has no weight. We can skip it.
++ contributor->n1 = contributor->n0 + i - 1;
++ }
++}
++
++static void stbir__calculate_coefficients_downsample(stbir_filter filter, float scale_ratio, int out_first_pixel, int out_last_pixel, float out_center_of_in, stbir__contributors* contributor, float* coefficient_group)
++{
++ int i;
++
++ STBIR_ASSERT(out_last_pixel - out_first_pixel <= (int)ceil(stbir__filter_info_table[filter].support(scale_ratio) * 2)); // Taken directly from stbir__get_coefficient_width() which we can't call because we don't know if we're horizontal or vertical.
++
++ contributor->n0 = out_first_pixel;
++ contributor->n1 = out_last_pixel;
++
++ STBIR_ASSERT(contributor->n1 >= contributor->n0);
++
++ for (i = 0; i <= out_last_pixel - out_first_pixel; i++)
++ {
++ float out_pixel_center = (float)(i + out_first_pixel) + 0.5f;
++ float x = out_pixel_center - out_center_of_in;
++ coefficient_group[i] = stbir__filter_info_table[filter].kernel(x, scale_ratio) * scale_ratio;
++ }
++
++ STBIR_ASSERT(stbir__filter_info_table[filter].kernel((float)(out_last_pixel + 1) + 0.5f - out_center_of_in, scale_ratio) == 0);
++
++ for (i = out_last_pixel - out_first_pixel; i >= 0; i--)
++ {
++ if (coefficient_group[i])
++ break;
++
++ // This line has no weight. We can skip it.
++ contributor->n1 = contributor->n0 + i - 1;
++ }
++}
++
++static void stbir__normalize_downsample_coefficients(stbir__contributors* contributors, float* coefficients, stbir_filter filter, float scale_ratio, int input_size, int output_size)
++{
++ int num_contributors = stbir__get_contributors(scale_ratio, filter, input_size, output_size);
++ int num_coefficients = stbir__get_coefficient_width(filter, scale_ratio);
++ int i, j;
++ int skip;
++
++ for (i = 0; i < output_size; i++)
++ {
++ float scale;
++ float total = 0;
++
++ for (j = 0; j < num_contributors; j++)
++ {
++ if (i >= contributors[j].n0 && i <= contributors[j].n1)
++ {
++ float coefficient = *stbir__get_coefficient(coefficients, filter, scale_ratio, j, i - contributors[j].n0);
++ total += coefficient;
++ }
++ else if (i < contributors[j].n0)
++ break;
++ }
++
++ STBIR_ASSERT(total > 0.9f);
++ STBIR_ASSERT(total < 1.1f);
++
++ scale = 1 / total;
++
++ for (j = 0; j < num_contributors; j++)
++ {
++ if (i >= contributors[j].n0 && i <= contributors[j].n1)
++ *stbir__get_coefficient(coefficients, filter, scale_ratio, j, i - contributors[j].n0) *= scale;
++ else if (i < contributors[j].n0)
++ break;
++ }
++ }
++
++ // Optimize: Skip zero coefficients and contributions outside of image bounds.
++ // Do this after normalizing because normalization depends on the n0/n1 values.
++ for (j = 0; j < num_contributors; j++)
++ {
++ int range, max, width;
++
++ skip = 0;
++ while (*stbir__get_coefficient(coefficients, filter, scale_ratio, j, skip) == 0)
++ skip++;
++
++ contributors[j].n0 += skip;
++
++ while (contributors[j].n0 < 0)
++ {
++ contributors[j].n0++;
++ skip++;
++ }
++
++ range = contributors[j].n1 - contributors[j].n0 + 1;
++ max = stbir__min(num_coefficients, range);
++
++ width = stbir__get_coefficient_width(filter, scale_ratio);
++ for (i = 0; i < max; i++)
++ {
++ if (i + skip >= width)
++ break;
++
++ *stbir__get_coefficient(coefficients, filter, scale_ratio, j, i) = *stbir__get_coefficient(coefficients, filter, scale_ratio, j, i + skip);
++ }
++
++ continue;
++ }
++
++ // Using min to avoid writing into invalid pixels.
++ for (i = 0; i < num_contributors; i++)
++ contributors[i].n1 = stbir__min(contributors[i].n1, output_size - 1);
++}
++
++// Each scan line uses the same kernel values so we should calculate the kernel
++// values once and then we can use them for every scan line.
++static void stbir__calculate_filters(stbir__contributors* contributors, float* coefficients, stbir_filter filter, float scale_ratio, float shift, int input_size, int output_size)
++{
++ int n;
++ int total_contributors = stbir__get_contributors(scale_ratio, filter, input_size, output_size);
++
++ if (stbir__use_upsampling(scale_ratio))
++ {
++ float out_pixels_radius = stbir__filter_info_table[filter].support(1 / scale_ratio) * scale_ratio;
++
++ // Looping through out pixels
++ for (n = 0; n < total_contributors; n++)
++ {
++ float in_center_of_out; // Center of the current out pixel in the in pixel space
++ int in_first_pixel, in_last_pixel;
++
++ stbir__calculate_sample_range_upsample(n, out_pixels_radius, scale_ratio, shift, &in_first_pixel, &in_last_pixel, &in_center_of_out);
++
++ stbir__calculate_coefficients_upsample(filter, scale_ratio, in_first_pixel, in_last_pixel, in_center_of_out, stbir__get_contributor(contributors, n), stbir__get_coefficient(coefficients, filter, scale_ratio, n, 0));
++ }
++ }
++ else
++ {
++ float in_pixels_radius = stbir__filter_info_table[filter].support(scale_ratio) / scale_ratio;
++
++ // Looping through in pixels
++ for (n = 0; n < total_contributors; n++)
++ {
++ float out_center_of_in; // Center of the current out pixel in the in pixel space
++ int out_first_pixel, out_last_pixel;
++ int n_adjusted = n - stbir__get_filter_pixel_margin(filter, scale_ratio);
++
++ stbir__calculate_sample_range_downsample(n_adjusted, in_pixels_radius, scale_ratio, shift, &out_first_pixel, &out_last_pixel, &out_center_of_in);
++
++ stbir__calculate_coefficients_downsample(filter, scale_ratio, out_first_pixel, out_last_pixel, out_center_of_in, stbir__get_contributor(contributors, n), stbir__get_coefficient(coefficients, filter, scale_ratio, n, 0));
++ }
++
++ stbir__normalize_downsample_coefficients(contributors, coefficients, filter, scale_ratio, input_size, output_size);
++ }
++}
++
++static float* stbir__get_decode_buffer(stbir__info* stbir_info)
++{
++ // The 0 index of the decode buffer starts after the margin. This makes
++ // it okay to use negative indexes on the decode buffer.
++ return &stbir_info->decode_buffer[stbir_info->horizontal_filter_pixel_margin * stbir_info->channels];
++}
++
++#define STBIR__DECODE(type, colorspace) ((type) * (STBIR_MAX_COLORSPACES) + (colorspace))
++
++static void stbir__decode_scanline(stbir__info* stbir_info, int n)
++{
++ int c;
++ int channels = stbir_info->channels;
++ int alpha_channel = stbir_info->alpha_channel;
++ int type = stbir_info->type;
++ int colorspace = stbir_info->colorspace;
++ int input_w = stbir_info->input_w;
++ size_t input_stride_bytes = stbir_info->input_stride_bytes;
++ float* decode_buffer = stbir__get_decode_buffer(stbir_info);
++ stbir_edge edge_horizontal = stbir_info->edge_horizontal;
++ stbir_edge edge_vertical = stbir_info->edge_vertical;
++ size_t in_buffer_row_offset = stbir__edge_wrap(edge_vertical, n, stbir_info->input_h) * input_stride_bytes;
++ const void* input_data = (char *) stbir_info->input_data + in_buffer_row_offset;
++ int max_x = input_w + stbir_info->horizontal_filter_pixel_margin;
++ int decode = STBIR__DECODE(type, colorspace);
++
++ int x = -stbir_info->horizontal_filter_pixel_margin;
++
++ // special handling for STBIR_EDGE_ZERO because it needs to return an item that doesn't appear in the input,
++ // and we want to avoid paying overhead on every pixel if not STBIR_EDGE_ZERO
++ if (edge_vertical == STBIR_EDGE_ZERO && (n < 0 || n >= stbir_info->input_h))
++ {
++ for (; x < max_x; x++)
++ for (c = 0; c < channels; c++)
++ decode_buffer[x*channels + c] = 0;
++ return;
++ }
++
++ switch (decode)
++ {
++ case STBIR__DECODE(STBIR_TYPE_UINT8, STBIR_COLORSPACE_LINEAR):
++ for (; x < max_x; x++)
++ {
++ int decode_pixel_index = x * channels;
++ int input_pixel_index = stbir__edge_wrap(edge_horizontal, x, input_w) * channels;
++ for (c = 0; c < channels; c++)
++ decode_buffer[decode_pixel_index + c] = ((float)((const unsigned char*)input_data)[input_pixel_index + c]) / stbir__max_uint8_as_float;
++ }
++ break;
++
++ case STBIR__DECODE(STBIR_TYPE_UINT8, STBIR_COLORSPACE_SRGB):
++ for (; x < max_x; x++)
++ {
++ int decode_pixel_index = x * channels;
++ int input_pixel_index = stbir__edge_wrap(edge_horizontal, x, input_w) * channels;
++ for (c = 0; c < channels; c++)
++ decode_buffer[decode_pixel_index + c] = stbir__srgb_uchar_to_linear_float[((const unsigned char*)input_data)[input_pixel_index + c]];
++
++ if (!(stbir_info->flags&STBIR_FLAG_ALPHA_USES_COLORSPACE))
++ decode_buffer[decode_pixel_index + alpha_channel] = ((float)((const unsigned char*)input_data)[input_pixel_index + alpha_channel]) / stbir__max_uint8_as_float;
++ }
++ break;
++
++ case STBIR__DECODE(STBIR_TYPE_UINT16, STBIR_COLORSPACE_LINEAR):
++ for (; x < max_x; x++)
++ {
++ int decode_pixel_index = x * channels;
++ int input_pixel_index = stbir__edge_wrap(edge_horizontal, x, input_w) * channels;
++ for (c = 0; c < channels; c++)
++ decode_buffer[decode_pixel_index + c] = ((float)((const unsigned short*)input_data)[input_pixel_index + c]) / stbir__max_uint16_as_float;
++ }
++ break;
++
++ case STBIR__DECODE(STBIR_TYPE_UINT16, STBIR_COLORSPACE_SRGB):
++ for (; x < max_x; x++)
++ {
++ int decode_pixel_index = x * channels;
++ int input_pixel_index = stbir__edge_wrap(edge_horizontal, x, input_w) * channels;
++ for (c = 0; c < channels; c++)
++ decode_buffer[decode_pixel_index + c] = stbir__srgb_to_linear(((float)((const unsigned short*)input_data)[input_pixel_index + c]) / stbir__max_uint16_as_float);
++
++ if (!(stbir_info->flags&STBIR_FLAG_ALPHA_USES_COLORSPACE))
++ decode_buffer[decode_pixel_index + alpha_channel] = ((float)((const unsigned short*)input_data)[input_pixel_index + alpha_channel]) / stbir__max_uint16_as_float;
++ }
++ break;
++
++ case STBIR__DECODE(STBIR_TYPE_UINT32, STBIR_COLORSPACE_LINEAR):
++ for (; x < max_x; x++)
++ {
++ int decode_pixel_index = x * channels;
++ int input_pixel_index = stbir__edge_wrap(edge_horizontal, x, input_w) * channels;
++ for (c = 0; c < channels; c++)
++ decode_buffer[decode_pixel_index + c] = (float)(((double)((const unsigned int*)input_data)[input_pixel_index + c]) / stbir__max_uint32_as_float);
++ }
++ break;
++
++ case STBIR__DECODE(STBIR_TYPE_UINT32, STBIR_COLORSPACE_SRGB):
++ for (; x < max_x; x++)
++ {
++ int decode_pixel_index = x * channels;
++ int input_pixel_index = stbir__edge_wrap(edge_horizontal, x, input_w) * channels;
++ for (c = 0; c < channels; c++)
++ decode_buffer[decode_pixel_index + c] = stbir__srgb_to_linear((float)(((double)((const unsigned int*)input_data)[input_pixel_index + c]) / stbir__max_uint32_as_float));
++
++ if (!(stbir_info->flags&STBIR_FLAG_ALPHA_USES_COLORSPACE))
++ decode_buffer[decode_pixel_index + alpha_channel] = (float)(((double)((const unsigned int*)input_data)[input_pixel_index + alpha_channel]) / stbir__max_uint32_as_float);
++ }
++ break;
++
++ case STBIR__DECODE(STBIR_TYPE_FLOAT, STBIR_COLORSPACE_LINEAR):
++ for (; x < max_x; x++)
++ {
++ int decode_pixel_index = x * channels;
++ int input_pixel_index = stbir__edge_wrap(edge_horizontal, x, input_w) * channels;
++ for (c = 0; c < channels; c++)
++ decode_buffer[decode_pixel_index + c] = ((const float*)input_data)[input_pixel_index + c];
++ }
++ break;
++
++ case STBIR__DECODE(STBIR_TYPE_FLOAT, STBIR_COLORSPACE_SRGB):
++ for (; x < max_x; x++)
++ {
++ int decode_pixel_index = x * channels;
++ int input_pixel_index = stbir__edge_wrap(edge_horizontal, x, input_w) * channels;
++ for (c = 0; c < channels; c++)
++ decode_buffer[decode_pixel_index + c] = stbir__srgb_to_linear(((const float*)input_data)[input_pixel_index + c]);
++
++ if (!(stbir_info->flags&STBIR_FLAG_ALPHA_USES_COLORSPACE))
++ decode_buffer[decode_pixel_index + alpha_channel] = ((const float*)input_data)[input_pixel_index + alpha_channel];
++ }
++
++ break;
++
++ default:
++ STBIR_ASSERT(!"Unknown type/colorspace/channels combination.");
++ break;
++ }
++
++ if (!(stbir_info->flags & STBIR_FLAG_ALPHA_PREMULTIPLIED))
++ {
++ for (x = -stbir_info->horizontal_filter_pixel_margin; x < max_x; x++)
++ {
++ int decode_pixel_index = x * channels;
++
++ // If the alpha value is 0 it will clobber the color values. Make sure it's not.
++ float alpha = decode_buffer[decode_pixel_index + alpha_channel];
++#ifndef STBIR_NO_ALPHA_EPSILON
++ if (stbir_info->type != STBIR_TYPE_FLOAT) {
++ alpha += STBIR_ALPHA_EPSILON;
++ decode_buffer[decode_pixel_index + alpha_channel] = alpha;
++ }
++#endif
++ for (c = 0; c < channels; c++)
++ {
++ if (c == alpha_channel)
++ continue;
++
++ decode_buffer[decode_pixel_index + c] *= alpha;
++ }
++ }
++ }
++
++ if (edge_horizontal == STBIR_EDGE_ZERO)
++ {
++ for (x = -stbir_info->horizontal_filter_pixel_margin; x < 0; x++)
++ {
++ for (c = 0; c < channels; c++)
++ decode_buffer[x*channels + c] = 0;
++ }
++ for (x = input_w; x < max_x; x++)
++ {
++ for (c = 0; c < channels; c++)
++ decode_buffer[x*channels + c] = 0;
++ }
++ }
++}
++
++static float* stbir__get_ring_buffer_entry(float* ring_buffer, int index, int ring_buffer_length)
++{
++ return &ring_buffer[index * ring_buffer_length];
++}
++
++static float* stbir__add_empty_ring_buffer_entry(stbir__info* stbir_info, int n)
++{
++ int ring_buffer_index;
++ float* ring_buffer;
++
++ stbir_info->ring_buffer_last_scanline = n;
++
++ if (stbir_info->ring_buffer_begin_index < 0)
++ {
++ ring_buffer_index = stbir_info->ring_buffer_begin_index = 0;
++ stbir_info->ring_buffer_first_scanline = n;
++ }
++ else
++ {
++ ring_buffer_index = (stbir_info->ring_buffer_begin_index + (stbir_info->ring_buffer_last_scanline - stbir_info->ring_buffer_first_scanline)) % stbir_info->ring_buffer_num_entries;
++ STBIR_ASSERT(ring_buffer_index != stbir_info->ring_buffer_begin_index);
++ }
++
++ ring_buffer = stbir__get_ring_buffer_entry(stbir_info->ring_buffer, ring_buffer_index, stbir_info->ring_buffer_length_bytes / sizeof(float));
++ memset(ring_buffer, 0, stbir_info->ring_buffer_length_bytes);
++
++ return ring_buffer;
++}
++
++
++static void stbir__resample_horizontal_upsample(stbir__info* stbir_info, float* output_buffer)
++{
++ int x, k;
++ int output_w = stbir_info->output_w;
++ int channels = stbir_info->channels;
++ float* decode_buffer = stbir__get_decode_buffer(stbir_info);
++ stbir__contributors* horizontal_contributors = stbir_info->horizontal_contributors;
++ float* horizontal_coefficients = stbir_info->horizontal_coefficients;
++ int coefficient_width = stbir_info->horizontal_coefficient_width;
++
++ for (x = 0; x < output_w; x++)
++ {
++ int n0 = horizontal_contributors[x].n0;
++ int n1 = horizontal_contributors[x].n1;
++
++ int out_pixel_index = x * channels;
++ int coefficient_group = coefficient_width * x;
++ int coefficient_counter = 0;
++
++ STBIR_ASSERT(n1 >= n0);
++ STBIR_ASSERT(n0 >= -stbir_info->horizontal_filter_pixel_margin);
++ STBIR_ASSERT(n1 >= -stbir_info->horizontal_filter_pixel_margin);
++ STBIR_ASSERT(n0 < stbir_info->input_w + stbir_info->horizontal_filter_pixel_margin);
++ STBIR_ASSERT(n1 < stbir_info->input_w + stbir_info->horizontal_filter_pixel_margin);
++
++ switch (channels) {
++ case 1:
++ for (k = n0; k <= n1; k++)
++ {
++ int in_pixel_index = k * 1;
++ float coefficient = horizontal_coefficients[coefficient_group + coefficient_counter++];
++ STBIR_ASSERT(coefficient != 0);
++ output_buffer[out_pixel_index + 0] += decode_buffer[in_pixel_index + 0] * coefficient;
++ }
++ break;
++ case 2:
++ for (k = n0; k <= n1; k++)
++ {
++ int in_pixel_index = k * 2;
++ float coefficient = horizontal_coefficients[coefficient_group + coefficient_counter++];
++ STBIR_ASSERT(coefficient != 0);
++ output_buffer[out_pixel_index + 0] += decode_buffer[in_pixel_index + 0] * coefficient;
++ output_buffer[out_pixel_index + 1] += decode_buffer[in_pixel_index + 1] * coefficient;
++ }
++ break;
++ case 3:
++ for (k = n0; k <= n1; k++)
++ {
++ int in_pixel_index = k * 3;
++ float coefficient = horizontal_coefficients[coefficient_group + coefficient_counter++];
++ STBIR_ASSERT(coefficient != 0);
++ output_buffer[out_pixel_index + 0] += decode_buffer[in_pixel_index + 0] * coefficient;
++ output_buffer[out_pixel_index + 1] += decode_buffer[in_pixel_index + 1] * coefficient;
++ output_buffer[out_pixel_index + 2] += decode_buffer[in_pixel_index + 2] * coefficient;
++ }
++ break;
++ case 4:
++ for (k = n0; k <= n1; k++)
++ {
++ int in_pixel_index = k * 4;
++ float coefficient = horizontal_coefficients[coefficient_group + coefficient_counter++];
++ STBIR_ASSERT(coefficient != 0);
++ output_buffer[out_pixel_index + 0] += decode_buffer[in_pixel_index + 0] * coefficient;
++ output_buffer[out_pixel_index + 1] += decode_buffer[in_pixel_index + 1] * coefficient;
++ output_buffer[out_pixel_index + 2] += decode_buffer[in_pixel_index + 2] * coefficient;
++ output_buffer[out_pixel_index + 3] += decode_buffer[in_pixel_index + 3] * coefficient;
++ }
++ break;
++ default:
++ for (k = n0; k <= n1; k++)
++ {
++ int in_pixel_index = k * channels;
++ float coefficient = horizontal_coefficients[coefficient_group + coefficient_counter++];
++ int c;
++ STBIR_ASSERT(coefficient != 0);
++ for (c = 0; c < channels; c++)
++ output_buffer[out_pixel_index + c] += decode_buffer[in_pixel_index + c] * coefficient;
++ }
++ break;
++ }
++ }
++}
++
++static void stbir__resample_horizontal_downsample(stbir__info* stbir_info, float* output_buffer)
++{
++ int x, k;
++ int input_w = stbir_info->input_w;
++ int channels = stbir_info->channels;
++ float* decode_buffer = stbir__get_decode_buffer(stbir_info);
++ stbir__contributors* horizontal_contributors = stbir_info->horizontal_contributors;
++ float* horizontal_coefficients = stbir_info->horizontal_coefficients;
++ int coefficient_width = stbir_info->horizontal_coefficient_width;
++ int filter_pixel_margin = stbir_info->horizontal_filter_pixel_margin;
++ int max_x = input_w + filter_pixel_margin * 2;
++
++ STBIR_ASSERT(!stbir__use_width_upsampling(stbir_info));
++
++ switch (channels) {
++ case 1:
++ for (x = 0; x < max_x; x++)
++ {
++ int n0 = horizontal_contributors[x].n0;
++ int n1 = horizontal_contributors[x].n1;
++
++ int in_x = x - filter_pixel_margin;
++ int in_pixel_index = in_x * 1;
++ int max_n = n1;
++ int coefficient_group = coefficient_width * x;
++
++ for (k = n0; k <= max_n; k++)
++ {
++ int out_pixel_index = k * 1;
++ float coefficient = horizontal_coefficients[coefficient_group + k - n0];
++ STBIR_ASSERT(coefficient != 0);
++ output_buffer[out_pixel_index + 0] += decode_buffer[in_pixel_index + 0] * coefficient;
++ }
++ }
++ break;
++
++ case 2:
++ for (x = 0; x < max_x; x++)
++ {
++ int n0 = horizontal_contributors[x].n0;
++ int n1 = horizontal_contributors[x].n1;
++
++ int in_x = x - filter_pixel_margin;
++ int in_pixel_index = in_x * 2;
++ int max_n = n1;
++ int coefficient_group = coefficient_width * x;
++
++ for (k = n0; k <= max_n; k++)
++ {
++ int out_pixel_index = k * 2;
++ float coefficient = horizontal_coefficients[coefficient_group + k - n0];
++ STBIR_ASSERT(coefficient != 0);
++ output_buffer[out_pixel_index + 0] += decode_buffer[in_pixel_index + 0] * coefficient;
++ output_buffer[out_pixel_index + 1] += decode_buffer[in_pixel_index + 1] * coefficient;
++ }
++ }
++ break;
++
++ case 3:
++ for (x = 0; x < max_x; x++)
++ {
++ int n0 = horizontal_contributors[x].n0;
++ int n1 = horizontal_contributors[x].n1;
++
++ int in_x = x - filter_pixel_margin;
++ int in_pixel_index = in_x * 3;
++ int max_n = n1;
++ int coefficient_group = coefficient_width * x;
++
++ for (k = n0; k <= max_n; k++)
++ {
++ int out_pixel_index = k * 3;
++ float coefficient = horizontal_coefficients[coefficient_group + k - n0];
++ STBIR_ASSERT(coefficient != 0);
++ output_buffer[out_pixel_index + 0] += decode_buffer[in_pixel_index + 0] * coefficient;
++ output_buffer[out_pixel_index + 1] += decode_buffer[in_pixel_index + 1] * coefficient;
++ output_buffer[out_pixel_index + 2] += decode_buffer[in_pixel_index + 2] * coefficient;
++ }
++ }
++ break;
++
++ case 4:
++ for (x = 0; x < max_x; x++)
++ {
++ int n0 = horizontal_contributors[x].n0;
++ int n1 = horizontal_contributors[x].n1;
++
++ int in_x = x - filter_pixel_margin;
++ int in_pixel_index = in_x * 4;
++ int max_n = n1;
++ int coefficient_group = coefficient_width * x;
++
++ for (k = n0; k <= max_n; k++)
++ {
++ int out_pixel_index = k * 4;
++ float coefficient = horizontal_coefficients[coefficient_group + k - n0];
++ STBIR_ASSERT(coefficient != 0);
++ output_buffer[out_pixel_index + 0] += decode_buffer[in_pixel_index + 0] * coefficient;
++ output_buffer[out_pixel_index + 1] += decode_buffer[in_pixel_index + 1] * coefficient;
++ output_buffer[out_pixel_index + 2] += decode_buffer[in_pixel_index + 2] * coefficient;
++ output_buffer[out_pixel_index + 3] += decode_buffer[in_pixel_index + 3] * coefficient;
++ }
++ }
++ break;
++
++ default:
++ for (x = 0; x < max_x; x++)
++ {
++ int n0 = horizontal_contributors[x].n0;
++ int n1 = horizontal_contributors[x].n1;
++
++ int in_x = x - filter_pixel_margin;
++ int in_pixel_index = in_x * channels;
++ int max_n = n1;
++ int coefficient_group = coefficient_width * x;
++
++ for (k = n0; k <= max_n; k++)
++ {
++ int c;
++ int out_pixel_index = k * channels;
++ float coefficient = horizontal_coefficients[coefficient_group + k - n0];
++ STBIR_ASSERT(coefficient != 0);
++ for (c = 0; c < channels; c++)
++ output_buffer[out_pixel_index + c] += decode_buffer[in_pixel_index + c] * coefficient;
++ }
++ }
++ break;
++ }
++}
++
++static void stbir__decode_and_resample_upsample(stbir__info* stbir_info, int n)
++{
++ // Decode the nth scanline from the source image into the decode buffer.
++ stbir__decode_scanline(stbir_info, n);
++
++ // Now resample it into the ring buffer.
++ if (stbir__use_width_upsampling(stbir_info))
++ stbir__resample_horizontal_upsample(stbir_info, stbir__add_empty_ring_buffer_entry(stbir_info, n));
++ else
++ stbir__resample_horizontal_downsample(stbir_info, stbir__add_empty_ring_buffer_entry(stbir_info, n));
++
++ // Now it's sitting in the ring buffer ready to be used as source for the vertical sampling.
++}
++
++static void stbir__decode_and_resample_downsample(stbir__info* stbir_info, int n)
++{
++ // Decode the nth scanline from the source image into the decode buffer.
++ stbir__decode_scanline(stbir_info, n);
++
++ memset(stbir_info->horizontal_buffer, 0, stbir_info->output_w * stbir_info->channels * sizeof(float));
++
++ // Now resample it into the horizontal buffer.
++ if (stbir__use_width_upsampling(stbir_info))
++ stbir__resample_horizontal_upsample(stbir_info, stbir_info->horizontal_buffer);
++ else
++ stbir__resample_horizontal_downsample(stbir_info, stbir_info->horizontal_buffer);
++
++ // Now it's sitting in the horizontal buffer ready to be distributed into the ring buffers.
++}
++
++// Get the specified scan line from the ring buffer.
++static float* stbir__get_ring_buffer_scanline(int get_scanline, float* ring_buffer, int begin_index, int first_scanline, int ring_buffer_num_entries, int ring_buffer_length)
++{
++ int ring_buffer_index = (begin_index + (get_scanline - first_scanline)) % ring_buffer_num_entries;
++ return stbir__get_ring_buffer_entry(ring_buffer, ring_buffer_index, ring_buffer_length);
++}
++
++
++static void stbir__encode_scanline(stbir__info* stbir_info, int num_pixels, void *output_buffer, float *encode_buffer, int channels, int alpha_channel, int decode)
++{
++ int x;
++ int n;
++ int num_nonalpha;
++ stbir_uint16 nonalpha[STBIR_MAX_CHANNELS];
++
++ if (!(stbir_info->flags&STBIR_FLAG_ALPHA_PREMULTIPLIED))
++ {
++ for (x=0; x < num_pixels; ++x)
++ {
++ int pixel_index = x*channels;
++
++ float alpha = encode_buffer[pixel_index + alpha_channel];
++ float reciprocal_alpha = alpha ? 1.0f / alpha : 0;
++
++ // unrolling this produced a 1% slowdown upscaling a large RGBA linear-space image on my machine - stb
++ for (n = 0; n < channels; n++)
++ if (n != alpha_channel)
++ encode_buffer[pixel_index + n] *= reciprocal_alpha;
++
++ // We added in a small epsilon to prevent the color channel from being deleted with zero alpha.
++ // Because we only add it for integer types, it will automatically be discarded on integer
++ // conversion, so we don't need to subtract it back out (which would be problematic for
++ // numeric precision reasons).
++ }
++ }
++
++ // build a table of all channels that need colorspace correction, so
++ // we don't perform colorspace correction on channels that don't need it.
++ for (x = 0, num_nonalpha = 0; x < channels; ++x)
++ {
++ if (x != alpha_channel || (stbir_info->flags & STBIR_FLAG_ALPHA_USES_COLORSPACE))
++ {
++ nonalpha[num_nonalpha++] = (stbir_uint16)x;
++ }
++ }
++
++ #define STBIR__ROUND_INT(f) ((int) ((f)+0.5))
++ #define STBIR__ROUND_UINT(f) ((stbir_uint32) ((f)+0.5))
++
++ #ifdef STBIR__SATURATE_INT
++ #define STBIR__ENCODE_LINEAR8(f) stbir__saturate8 (STBIR__ROUND_INT((f) * stbir__max_uint8_as_float ))
++ #define STBIR__ENCODE_LINEAR16(f) stbir__saturate16(STBIR__ROUND_INT((f) * stbir__max_uint16_as_float))
++ #else
++ #define STBIR__ENCODE_LINEAR8(f) (unsigned char ) STBIR__ROUND_INT(stbir__saturate(f) * stbir__max_uint8_as_float )
++ #define STBIR__ENCODE_LINEAR16(f) (unsigned short) STBIR__ROUND_INT(stbir__saturate(f) * stbir__max_uint16_as_float)
++ #endif
++
++ switch (decode)
++ {
++ case STBIR__DECODE(STBIR_TYPE_UINT8, STBIR_COLORSPACE_LINEAR):
++ for (x=0; x < num_pixels; ++x)
++ {
++ int pixel_index = x*channels;
++
++ for (n = 0; n < channels; n++)
++ {
++ int index = pixel_index + n;
++ ((unsigned char*)output_buffer)[index] = STBIR__ENCODE_LINEAR8(encode_buffer[index]);
++ }
++ }
++ break;
++
++ case STBIR__DECODE(STBIR_TYPE_UINT8, STBIR_COLORSPACE_SRGB):
++ for (x=0; x < num_pixels; ++x)
++ {
++ int pixel_index = x*channels;
++
++ for (n = 0; n < num_nonalpha; n++)
++ {
++ int index = pixel_index + nonalpha[n];
++ ((unsigned char*)output_buffer)[index] = stbir__linear_to_srgb_uchar(encode_buffer[index]);
++ }
++
++ if (!(stbir_info->flags & STBIR_FLAG_ALPHA_USES_COLORSPACE))
++ ((unsigned char *)output_buffer)[pixel_index + alpha_channel] = STBIR__ENCODE_LINEAR8(encode_buffer[pixel_index+alpha_channel]);
++ }
++ break;
++
++ case STBIR__DECODE(STBIR_TYPE_UINT16, STBIR_COLORSPACE_LINEAR):
++ for (x=0; x < num_pixels; ++x)
++ {
++ int pixel_index = x*channels;
++
++ for (n = 0; n < channels; n++)
++ {
++ int index = pixel_index + n;
++ ((unsigned short*)output_buffer)[index] = STBIR__ENCODE_LINEAR16(encode_buffer[index]);
++ }
++ }
++ break;
++
++ case STBIR__DECODE(STBIR_TYPE_UINT16, STBIR_COLORSPACE_SRGB):
++ for (x=0; x < num_pixels; ++x)
++ {
++ int pixel_index = x*channels;
++
++ for (n = 0; n < num_nonalpha; n++)
++ {
++ int index = pixel_index + nonalpha[n];
++ ((unsigned short*)output_buffer)[index] = (unsigned short)STBIR__ROUND_INT(stbir__linear_to_srgb(stbir__saturate(encode_buffer[index])) * stbir__max_uint16_as_float);
++ }
++
++ if (!(stbir_info->flags&STBIR_FLAG_ALPHA_USES_COLORSPACE))
++ ((unsigned short*)output_buffer)[pixel_index + alpha_channel] = STBIR__ENCODE_LINEAR16(encode_buffer[pixel_index + alpha_channel]);
++ }
++
++ break;
++
++ case STBIR__DECODE(STBIR_TYPE_UINT32, STBIR_COLORSPACE_LINEAR):
++ for (x=0; x < num_pixels; ++x)
++ {
++ int pixel_index = x*channels;
++
++ for (n = 0; n < channels; n++)
++ {
++ int index = pixel_index + n;
++ ((unsigned int*)output_buffer)[index] = (unsigned int)STBIR__ROUND_UINT(((double)stbir__saturate(encode_buffer[index])) * stbir__max_uint32_as_float);
++ }
++ }
++ break;
++
++ case STBIR__DECODE(STBIR_TYPE_UINT32, STBIR_COLORSPACE_SRGB):
++ for (x=0; x < num_pixels; ++x)
++ {
++ int pixel_index = x*channels;
++
++ for (n = 0; n < num_nonalpha; n++)
++ {
++ int index = pixel_index + nonalpha[n];
++ ((unsigned int*)output_buffer)[index] = (unsigned int)STBIR__ROUND_UINT(((double)stbir__linear_to_srgb(stbir__saturate(encode_buffer[index]))) * stbir__max_uint32_as_float);
++ }
++
++ if (!(stbir_info->flags&STBIR_FLAG_ALPHA_USES_COLORSPACE))
++ ((unsigned int*)output_buffer)[pixel_index + alpha_channel] = (unsigned int)STBIR__ROUND_INT(((double)stbir__saturate(encode_buffer[pixel_index + alpha_channel])) * stbir__max_uint32_as_float);
++ }
++ break;
++
++ case STBIR__DECODE(STBIR_TYPE_FLOAT, STBIR_COLORSPACE_LINEAR):
++ for (x=0; x < num_pixels; ++x)
++ {
++ int pixel_index = x*channels;
++
++ for (n = 0; n < channels; n++)
++ {
++ int index = pixel_index + n;
++ ((float*)output_buffer)[index] = encode_buffer[index];
++ }
++ }
++ break;
++
++ case STBIR__DECODE(STBIR_TYPE_FLOAT, STBIR_COLORSPACE_SRGB):
++ for (x=0; x < num_pixels; ++x)
++ {
++ int pixel_index = x*channels;
++
++ for (n = 0; n < num_nonalpha; n++)
++ {
++ int index = pixel_index + nonalpha[n];
++ ((float*)output_buffer)[index] = stbir__linear_to_srgb(encode_buffer[index]);
++ }
++
++ if (!(stbir_info->flags&STBIR_FLAG_ALPHA_USES_COLORSPACE))
++ ((float*)output_buffer)[pixel_index + alpha_channel] = encode_buffer[pixel_index + alpha_channel];
++ }
++ break;
++
++ default:
++ STBIR_ASSERT(!"Unknown type/colorspace/channels combination.");
++ break;
++ }
++}
++
++static void stbir__resample_vertical_upsample(stbir__info* stbir_info, int n)
++{
++ int x, k;
++ int output_w = stbir_info->output_w;
++ stbir__contributors* vertical_contributors = stbir_info->vertical_contributors;
++ float* vertical_coefficients = stbir_info->vertical_coefficients;
++ int channels = stbir_info->channels;
++ int alpha_channel = stbir_info->alpha_channel;
++ int type = stbir_info->type;
++ int colorspace = stbir_info->colorspace;
++ int ring_buffer_entries = stbir_info->ring_buffer_num_entries;
++ void* output_data = stbir_info->output_data;
++ float* encode_buffer = stbir_info->encode_buffer;
++ int decode = STBIR__DECODE(type, colorspace);
++ int coefficient_width = stbir_info->vertical_coefficient_width;
++ int coefficient_counter;
++ int contributor = n;
++
++ float* ring_buffer = stbir_info->ring_buffer;
++ int ring_buffer_begin_index = stbir_info->ring_buffer_begin_index;
++ int ring_buffer_first_scanline = stbir_info->ring_buffer_first_scanline;
++ int ring_buffer_length = stbir_info->ring_buffer_length_bytes/sizeof(float);
++
++ int n0,n1, output_row_start;
++ int coefficient_group = coefficient_width * contributor;
++
++ n0 = vertical_contributors[contributor].n0;
++ n1 = vertical_contributors[contributor].n1;
++
++ output_row_start = n * stbir_info->output_stride_bytes;
++
++ STBIR_ASSERT(stbir__use_height_upsampling(stbir_info));
++
++ memset(encode_buffer, 0, output_w * sizeof(float) * channels);
++
++ // I tried reblocking this for better cache usage of encode_buffer
++ // (using x_outer, k, x_inner), but it lost speed. -- stb
++
++ coefficient_counter = 0;
++ switch (channels) {
++ case 1:
++ for (k = n0; k <= n1; k++)
++ {
++ int coefficient_index = coefficient_counter++;
++ float* ring_buffer_entry = stbir__get_ring_buffer_scanline(k, ring_buffer, ring_buffer_begin_index, ring_buffer_first_scanline, ring_buffer_entries, ring_buffer_length);
++ float coefficient = vertical_coefficients[coefficient_group + coefficient_index];
++ for (x = 0; x < output_w; ++x)
++ {
++ int in_pixel_index = x * 1;
++ encode_buffer[in_pixel_index + 0] += ring_buffer_entry[in_pixel_index + 0] * coefficient;
++ }
++ }
++ break;
++ case 2:
++ for (k = n0; k <= n1; k++)
++ {
++ int coefficient_index = coefficient_counter++;
++ float* ring_buffer_entry = stbir__get_ring_buffer_scanline(k, ring_buffer, ring_buffer_begin_index, ring_buffer_first_scanline, ring_buffer_entries, ring_buffer_length);
++ float coefficient = vertical_coefficients[coefficient_group + coefficient_index];
++ for (x = 0; x < output_w; ++x)
++ {
++ int in_pixel_index = x * 2;
++ encode_buffer[in_pixel_index + 0] += ring_buffer_entry[in_pixel_index + 0] * coefficient;
++ encode_buffer[in_pixel_index + 1] += ring_buffer_entry[in_pixel_index + 1] * coefficient;
++ }
++ }
++ break;
++ case 3:
++ for (k = n0; k <= n1; k++)
++ {
++ int coefficient_index = coefficient_counter++;
++ float* ring_buffer_entry = stbir__get_ring_buffer_scanline(k, ring_buffer, ring_buffer_begin_index, ring_buffer_first_scanline, ring_buffer_entries, ring_buffer_length);
++ float coefficient = vertical_coefficients[coefficient_group + coefficient_index];
++ for (x = 0; x < output_w; ++x)
++ {
++ int in_pixel_index = x * 3;
++ encode_buffer[in_pixel_index + 0] += ring_buffer_entry[in_pixel_index + 0] * coefficient;
++ encode_buffer[in_pixel_index + 1] += ring_buffer_entry[in_pixel_index + 1] * coefficient;
++ encode_buffer[in_pixel_index + 2] += ring_buffer_entry[in_pixel_index + 2] * coefficient;
++ }
++ }
++ break;
++ case 4:
++ for (k = n0; k <= n1; k++)
++ {
++ int coefficient_index = coefficient_counter++;
++ float* ring_buffer_entry = stbir__get_ring_buffer_scanline(k, ring_buffer, ring_buffer_begin_index, ring_buffer_first_scanline, ring_buffer_entries, ring_buffer_length);
++ float coefficient = vertical_coefficients[coefficient_group + coefficient_index];
++ for (x = 0; x < output_w; ++x)
++ {
++ int in_pixel_index = x * 4;
++ encode_buffer[in_pixel_index + 0] += ring_buffer_entry[in_pixel_index + 0] * coefficient;
++ encode_buffer[in_pixel_index + 1] += ring_buffer_entry[in_pixel_index + 1] * coefficient;
++ encode_buffer[in_pixel_index + 2] += ring_buffer_entry[in_pixel_index + 2] * coefficient;
++ encode_buffer[in_pixel_index + 3] += ring_buffer_entry[in_pixel_index + 3] * coefficient;
++ }
++ }
++ break;
++ default:
++ for (k = n0; k <= n1; k++)
++ {
++ int coefficient_index = coefficient_counter++;
++ float* ring_buffer_entry = stbir__get_ring_buffer_scanline(k, ring_buffer, ring_buffer_begin_index, ring_buffer_first_scanline, ring_buffer_entries, ring_buffer_length);
++ float coefficient = vertical_coefficients[coefficient_group + coefficient_index];
++ for (x = 0; x < output_w; ++x)
++ {
++ int in_pixel_index = x * channels;
++ int c;
++ for (c = 0; c < channels; c++)
++ encode_buffer[in_pixel_index + c] += ring_buffer_entry[in_pixel_index + c] * coefficient;
++ }
++ }
++ break;
++ }
++ stbir__encode_scanline(stbir_info, output_w, (char *) output_data + output_row_start, encode_buffer, channels, alpha_channel, decode);
++}
++
++static void stbir__resample_vertical_downsample(stbir__info* stbir_info, int n)
++{
++ int x, k;
++ int output_w = stbir_info->output_w;
++ stbir__contributors* vertical_contributors = stbir_info->vertical_contributors;
++ float* vertical_coefficients = stbir_info->vertical_coefficients;
++ int channels = stbir_info->channels;
++ int ring_buffer_entries = stbir_info->ring_buffer_num_entries;
++ float* horizontal_buffer = stbir_info->horizontal_buffer;
++ int coefficient_width = stbir_info->vertical_coefficient_width;
++ int contributor = n + stbir_info->vertical_filter_pixel_margin;
++
++ float* ring_buffer = stbir_info->ring_buffer;
++ int ring_buffer_begin_index = stbir_info->ring_buffer_begin_index;
++ int ring_buffer_first_scanline = stbir_info->ring_buffer_first_scanline;
++ int ring_buffer_length = stbir_info->ring_buffer_length_bytes/sizeof(float);
++ int n0,n1;
++
++ n0 = vertical_contributors[contributor].n0;
++ n1 = vertical_contributors[contributor].n1;
++
++ STBIR_ASSERT(!stbir__use_height_upsampling(stbir_info));
++
++ for (k = n0; k <= n1; k++)
++ {
++ int coefficient_index = k - n0;
++ int coefficient_group = coefficient_width * contributor;
++ float coefficient = vertical_coefficients[coefficient_group + coefficient_index];
++
++ float* ring_buffer_entry = stbir__get_ring_buffer_scanline(k, ring_buffer, ring_buffer_begin_index, ring_buffer_first_scanline, ring_buffer_entries, ring_buffer_length);
++
++ switch (channels) {
++ case 1:
++ for (x = 0; x < output_w; x++)
++ {
++ int in_pixel_index = x * 1;
++ ring_buffer_entry[in_pixel_index + 0] += horizontal_buffer[in_pixel_index + 0] * coefficient;
++ }
++ break;
++ case 2:
++ for (x = 0; x < output_w; x++)
++ {
++ int in_pixel_index = x * 2;
++ ring_buffer_entry[in_pixel_index + 0] += horizontal_buffer[in_pixel_index + 0] * coefficient;
++ ring_buffer_entry[in_pixel_index + 1] += horizontal_buffer[in_pixel_index + 1] * coefficient;
++ }
++ break;
++ case 3:
++ for (x = 0; x < output_w; x++)
++ {
++ int in_pixel_index = x * 3;
++ ring_buffer_entry[in_pixel_index + 0] += horizontal_buffer[in_pixel_index + 0] * coefficient;
++ ring_buffer_entry[in_pixel_index + 1] += horizontal_buffer[in_pixel_index + 1] * coefficient;
++ ring_buffer_entry[in_pixel_index + 2] += horizontal_buffer[in_pixel_index + 2] * coefficient;
++ }
++ break;
++ case 4:
++ for (x = 0; x < output_w; x++)
++ {
++ int in_pixel_index = x * 4;
++ ring_buffer_entry[in_pixel_index + 0] += horizontal_buffer[in_pixel_index + 0] * coefficient;
++ ring_buffer_entry[in_pixel_index + 1] += horizontal_buffer[in_pixel_index + 1] * coefficient;
++ ring_buffer_entry[in_pixel_index + 2] += horizontal_buffer[in_pixel_index + 2] * coefficient;
++ ring_buffer_entry[in_pixel_index + 3] += horizontal_buffer[in_pixel_index + 3] * coefficient;
++ }
++ break;
++ default:
++ for (x = 0; x < output_w; x++)
++ {
++ int in_pixel_index = x * channels;
++
++ int c;
++ for (c = 0; c < channels; c++)
++ ring_buffer_entry[in_pixel_index + c] += horizontal_buffer[in_pixel_index + c] * coefficient;
++ }
++ break;
++ }
++ }
++}
++
++static void stbir__buffer_loop_upsample(stbir__info* stbir_info)
++{
++ int y;
++ float scale_ratio = stbir_info->vertical_scale;
++ float out_scanlines_radius = stbir__filter_info_table[stbir_info->vertical_filter].support(1/scale_ratio) * scale_ratio;
++
++ STBIR_ASSERT(stbir__use_height_upsampling(stbir_info));
++
++ for (y = 0; y < stbir_info->output_h; y++)
++ {
++ float in_center_of_out = 0; // Center of the current out scanline in the in scanline space
++ int in_first_scanline = 0, in_last_scanline = 0;
++
++ stbir__calculate_sample_range_upsample(y, out_scanlines_radius, scale_ratio, stbir_info->vertical_shift, &in_first_scanline, &in_last_scanline, &in_center_of_out);
++
++ STBIR_ASSERT(in_last_scanline - in_first_scanline + 1 <= stbir_info->ring_buffer_num_entries);
++
++ if (stbir_info->ring_buffer_begin_index >= 0)
++ {
++ // Get rid of whatever we don't need anymore.
++ while (in_first_scanline > stbir_info->ring_buffer_first_scanline)
++ {
++ if (stbir_info->ring_buffer_first_scanline == stbir_info->ring_buffer_last_scanline)
++ {
++ // We just popped the last scanline off the ring buffer.
++ // Reset it to the empty state.
++ stbir_info->ring_buffer_begin_index = -1;
++ stbir_info->ring_buffer_first_scanline = 0;
++ stbir_info->ring_buffer_last_scanline = 0;
++ break;
++ }
++ else
++ {
++ stbir_info->ring_buffer_first_scanline++;
++ stbir_info->ring_buffer_begin_index = (stbir_info->ring_buffer_begin_index + 1) % stbir_info->ring_buffer_num_entries;
++ }
++ }
++ }
++
++ // Load in new ones.
++ if (stbir_info->ring_buffer_begin_index < 0)
++ stbir__decode_and_resample_upsample(stbir_info, in_first_scanline);
++
++ while (in_last_scanline > stbir_info->ring_buffer_last_scanline)
++ stbir__decode_and_resample_upsample(stbir_info, stbir_info->ring_buffer_last_scanline + 1);
++
++ // Now all buffers should be ready to write a row of vertical sampling.
++ stbir__resample_vertical_upsample(stbir_info, y);
++
++ STBIR_PROGRESS_REPORT((float)y / stbir_info->output_h);
++ }
++}
++
++static void stbir__empty_ring_buffer(stbir__info* stbir_info, int first_necessary_scanline)
++{
++ int output_stride_bytes = stbir_info->output_stride_bytes;
++ int channels = stbir_info->channels;
++ int alpha_channel = stbir_info->alpha_channel;
++ int type = stbir_info->type;
++ int colorspace = stbir_info->colorspace;
++ int output_w = stbir_info->output_w;
++ void* output_data = stbir_info->output_data;
++ int decode = STBIR__DECODE(type, colorspace);
++
++ float* ring_buffer = stbir_info->ring_buffer;
++ int ring_buffer_length = stbir_info->ring_buffer_length_bytes/sizeof(float);
++
++ if (stbir_info->ring_buffer_begin_index >= 0)
++ {
++ // Get rid of whatever we don't need anymore.
++ while (first_necessary_scanline > stbir_info->ring_buffer_first_scanline)
++ {
++ if (stbir_info->ring_buffer_first_scanline >= 0 && stbir_info->ring_buffer_first_scanline < stbir_info->output_h)
++ {
++ int output_row_start = stbir_info->ring_buffer_first_scanline * output_stride_bytes;
++ float* ring_buffer_entry = stbir__get_ring_buffer_entry(ring_buffer, stbir_info->ring_buffer_begin_index, ring_buffer_length);
++ stbir__encode_scanline(stbir_info, output_w, (char *) output_data + output_row_start, ring_buffer_entry, channels, alpha_channel, decode);
++ STBIR_PROGRESS_REPORT((float)stbir_info->ring_buffer_first_scanline / stbir_info->output_h);
++ }
++
++ if (stbir_info->ring_buffer_first_scanline == stbir_info->ring_buffer_last_scanline)
++ {
++ // We just popped the last scanline off the ring buffer.
++ // Reset it to the empty state.
++ stbir_info->ring_buffer_begin_index = -1;
++ stbir_info->ring_buffer_first_scanline = 0;
++ stbir_info->ring_buffer_last_scanline = 0;
++ break;
++ }
++ else
++ {
++ stbir_info->ring_buffer_first_scanline++;
++ stbir_info->ring_buffer_begin_index = (stbir_info->ring_buffer_begin_index + 1) % stbir_info->ring_buffer_num_entries;
++ }
++ }
++ }
++}
++
++static void stbir__buffer_loop_downsample(stbir__info* stbir_info)
++{
++ int y;
++ float scale_ratio = stbir_info->vertical_scale;
++ int output_h = stbir_info->output_h;
++ float in_pixels_radius = stbir__filter_info_table[stbir_info->vertical_filter].support(scale_ratio) / scale_ratio;
++ int pixel_margin = stbir_info->vertical_filter_pixel_margin;
++ int max_y = stbir_info->input_h + pixel_margin;
++
++ STBIR_ASSERT(!stbir__use_height_upsampling(stbir_info));
++
++ for (y = -pixel_margin; y < max_y; y++)
++ {
++ float out_center_of_in; // Center of the current out scanline in the in scanline space
++ int out_first_scanline, out_last_scanline;
++
++ stbir__calculate_sample_range_downsample(y, in_pixels_radius, scale_ratio, stbir_info->vertical_shift, &out_first_scanline, &out_last_scanline, &out_center_of_in);
++
++ STBIR_ASSERT(out_last_scanline - out_first_scanline + 1 <= stbir_info->ring_buffer_num_entries);
++
++ if (out_last_scanline < 0 || out_first_scanline >= output_h)
++ continue;
++
++ stbir__empty_ring_buffer(stbir_info, out_first_scanline);
++
++ stbir__decode_and_resample_downsample(stbir_info, y);
++
++ // Load in new ones.
++ if (stbir_info->ring_buffer_begin_index < 0)
++ stbir__add_empty_ring_buffer_entry(stbir_info, out_first_scanline);
++
++ while (out_last_scanline > stbir_info->ring_buffer_last_scanline)
++ stbir__add_empty_ring_buffer_entry(stbir_info, stbir_info->ring_buffer_last_scanline + 1);
++
++ // Now the horizontal buffer is ready to write to all ring buffer rows.
++ stbir__resample_vertical_downsample(stbir_info, y);
++ }
++
++ stbir__empty_ring_buffer(stbir_info, stbir_info->output_h);
++}
++
++static void stbir__setup(stbir__info *info, int input_w, int input_h, int output_w, int output_h, int channels)
++{
++ info->input_w = input_w;
++ info->input_h = input_h;
++ info->output_w = output_w;
++ info->output_h = output_h;
++ info->channels = channels;
++}
++
++static void stbir__calculate_transform(stbir__info *info, float s0, float t0, float s1, float t1, float *transform)
++{
++ info->s0 = s0;
++ info->t0 = t0;
++ info->s1 = s1;
++ info->t1 = t1;
++
++ if (transform)
++ {
++ info->horizontal_scale = transform[0];
++ info->vertical_scale = transform[1];
++ info->horizontal_shift = transform[2];
++ info->vertical_shift = transform[3];
++ }
++ else
++ {
++ info->horizontal_scale = ((float)info->output_w / info->input_w) / (s1 - s0);
++ info->vertical_scale = ((float)info->output_h / info->input_h) / (t1 - t0);
++
++ info->horizontal_shift = s0 * info->output_w / (s1 - s0);
++ info->vertical_shift = t0 * info->output_h / (t1 - t0);
++ }
++}
++
++static void stbir__choose_filter(stbir__info *info, stbir_filter h_filter, stbir_filter v_filter)
++{
++ if (h_filter == 0)
++ h_filter = stbir__use_upsampling(info->horizontal_scale) ? STBIR_DEFAULT_FILTER_UPSAMPLE : STBIR_DEFAULT_FILTER_DOWNSAMPLE;
++ if (v_filter == 0)
++ v_filter = stbir__use_upsampling(info->vertical_scale) ? STBIR_DEFAULT_FILTER_UPSAMPLE : STBIR_DEFAULT_FILTER_DOWNSAMPLE;
++ info->horizontal_filter = h_filter;
++ info->vertical_filter = v_filter;
++}
++
++static stbir_uint32 stbir__calculate_memory(stbir__info *info)
++{
++ int pixel_margin = stbir__get_filter_pixel_margin(info->horizontal_filter, info->horizontal_scale);
++ int filter_height = stbir__get_filter_pixel_width(info->vertical_filter, info->vertical_scale);
++
++ info->horizontal_num_contributors = stbir__get_contributors(info->horizontal_scale, info->horizontal_filter, info->input_w, info->output_w);
++ info->vertical_num_contributors = stbir__get_contributors(info->vertical_scale , info->vertical_filter , info->input_h, info->output_h);
++
++ // One extra entry because floating point precision problems sometimes cause an extra to be necessary.
++ info->ring_buffer_num_entries = filter_height + 1;
++
++ info->horizontal_contributors_size = info->horizontal_num_contributors * sizeof(stbir__contributors);
++ info->horizontal_coefficients_size = stbir__get_total_horizontal_coefficients(info) * sizeof(float);
++ info->vertical_contributors_size = info->vertical_num_contributors * sizeof(stbir__contributors);
++ info->vertical_coefficients_size = stbir__get_total_vertical_coefficients(info) * sizeof(float);
++ info->decode_buffer_size = (info->input_w + pixel_margin * 2) * info->channels * sizeof(float);
++ info->horizontal_buffer_size = info->output_w * info->channels * sizeof(float);
++ info->ring_buffer_size = info->output_w * info->channels * info->ring_buffer_num_entries * sizeof(float);
++ info->encode_buffer_size = info->output_w * info->channels * sizeof(float);
++
++ STBIR_ASSERT(info->horizontal_filter != 0);
++ STBIR_ASSERT(info->horizontal_filter < STBIR__ARRAY_SIZE(stbir__filter_info_table)); // this now happens too late
++ STBIR_ASSERT(info->vertical_filter != 0);
++ STBIR_ASSERT(info->vertical_filter < STBIR__ARRAY_SIZE(stbir__filter_info_table)); // this now happens too late
++
++ if (stbir__use_height_upsampling(info))
++ // The horizontal buffer is for when we're downsampling the height and we
++ // can't output the result of sampling the decode buffer directly into the
++ // ring buffers.
++ info->horizontal_buffer_size = 0;
++ else
++ // The encode buffer is to retain precision in the height upsampling method
++ // and isn't used when height downsampling.
++ info->encode_buffer_size = 0;
++
++ return info->horizontal_contributors_size + info->horizontal_coefficients_size
++ + info->vertical_contributors_size + info->vertical_coefficients_size
++ + info->decode_buffer_size + info->horizontal_buffer_size
++ + info->ring_buffer_size + info->encode_buffer_size;
++}
++
++static int stbir__resize_allocated(stbir__info *info,
++ const void* input_data, int input_stride_in_bytes,
++ void* output_data, int output_stride_in_bytes,
++ int alpha_channel, stbir_uint32 flags, stbir_datatype type,
++ stbir_edge edge_horizontal, stbir_edge edge_vertical, stbir_colorspace colorspace,
++ void* tempmem, size_t tempmem_size_in_bytes)
++{
++ size_t memory_required = stbir__calculate_memory(info);
++
++ int width_stride_input = input_stride_in_bytes ? input_stride_in_bytes : info->channels * info->input_w * stbir__type_size[type];
++ int width_stride_output = output_stride_in_bytes ? output_stride_in_bytes : info->channels * info->output_w * stbir__type_size[type];
++
++#ifdef STBIR_DEBUG_OVERWRITE_TEST
++#define OVERWRITE_ARRAY_SIZE 8
++ unsigned char overwrite_output_before_pre[OVERWRITE_ARRAY_SIZE];
++ unsigned char overwrite_tempmem_before_pre[OVERWRITE_ARRAY_SIZE];
++ unsigned char overwrite_output_after_pre[OVERWRITE_ARRAY_SIZE];
++ unsigned char overwrite_tempmem_after_pre[OVERWRITE_ARRAY_SIZE];
++
++ size_t begin_forbidden = width_stride_output * (info->output_h - 1) + info->output_w * info->channels * stbir__type_size[type];
++ memcpy(overwrite_output_before_pre, &((unsigned char*)output_data)[-OVERWRITE_ARRAY_SIZE], OVERWRITE_ARRAY_SIZE);
++ memcpy(overwrite_output_after_pre, &((unsigned char*)output_data)[begin_forbidden], OVERWRITE_ARRAY_SIZE);
++ memcpy(overwrite_tempmem_before_pre, &((unsigned char*)tempmem)[-OVERWRITE_ARRAY_SIZE], OVERWRITE_ARRAY_SIZE);
++ memcpy(overwrite_tempmem_after_pre, &((unsigned char*)tempmem)[tempmem_size_in_bytes], OVERWRITE_ARRAY_SIZE);
++#endif
++
++ STBIR_ASSERT(info->channels >= 0);
++ STBIR_ASSERT(info->channels <= STBIR_MAX_CHANNELS);
++
++ if (info->channels < 0 || info->channels > STBIR_MAX_CHANNELS)
++ return 0;
++
++ STBIR_ASSERT(info->horizontal_filter < STBIR__ARRAY_SIZE(stbir__filter_info_table));
++ STBIR_ASSERT(info->vertical_filter < STBIR__ARRAY_SIZE(stbir__filter_info_table));
++
++ if (info->horizontal_filter >= STBIR__ARRAY_SIZE(stbir__filter_info_table))
++ return 0;
++ if (info->vertical_filter >= STBIR__ARRAY_SIZE(stbir__filter_info_table))
++ return 0;
++
++ if (alpha_channel < 0)
++ flags |= STBIR_FLAG_ALPHA_USES_COLORSPACE | STBIR_FLAG_ALPHA_PREMULTIPLIED;
++
++ if (!(flags&STBIR_FLAG_ALPHA_USES_COLORSPACE) || !(flags&STBIR_FLAG_ALPHA_PREMULTIPLIED)) {
++ STBIR_ASSERT(alpha_channel >= 0 && alpha_channel < info->channels);
++ }
++
++ if (alpha_channel >= info->channels)
++ return 0;
++
++ STBIR_ASSERT(tempmem);
++
++ if (!tempmem)
++ return 0;
++
++ STBIR_ASSERT(tempmem_size_in_bytes >= memory_required);
++
++ if (tempmem_size_in_bytes < memory_required)
++ return 0;
++
++ memset(tempmem, 0, tempmem_size_in_bytes);
++
++ info->input_data = input_data;
++ info->input_stride_bytes = width_stride_input;
++
++ info->output_data = output_data;
++ info->output_stride_bytes = width_stride_output;
++
++ info->alpha_channel = alpha_channel;
++ info->flags = flags;
++ info->type = type;
++ info->edge_horizontal = edge_horizontal;
++ info->edge_vertical = edge_vertical;
++ info->colorspace = colorspace;
++
++ info->horizontal_coefficient_width = stbir__get_coefficient_width (info->horizontal_filter, info->horizontal_scale);
++ info->vertical_coefficient_width = stbir__get_coefficient_width (info->vertical_filter , info->vertical_scale );
++ info->horizontal_filter_pixel_width = stbir__get_filter_pixel_width (info->horizontal_filter, info->horizontal_scale);
++ info->vertical_filter_pixel_width = stbir__get_filter_pixel_width (info->vertical_filter , info->vertical_scale );
++ info->horizontal_filter_pixel_margin = stbir__get_filter_pixel_margin(info->horizontal_filter, info->horizontal_scale);
++ info->vertical_filter_pixel_margin = stbir__get_filter_pixel_margin(info->vertical_filter , info->vertical_scale );
++
++ info->ring_buffer_length_bytes = info->output_w * info->channels * sizeof(float);
++ info->decode_buffer_pixels = info->input_w + info->horizontal_filter_pixel_margin * 2;
++
++#define STBIR__NEXT_MEMPTR(current, newtype) (newtype*)(((unsigned char*)current) + current##_size)
++
++ info->horizontal_contributors = (stbir__contributors *) tempmem;
++ info->horizontal_coefficients = STBIR__NEXT_MEMPTR(info->horizontal_contributors, float);
++ info->vertical_contributors = STBIR__NEXT_MEMPTR(info->horizontal_coefficients, stbir__contributors);
++ info->vertical_coefficients = STBIR__NEXT_MEMPTR(info->vertical_contributors, float);
++ info->decode_buffer = STBIR__NEXT_MEMPTR(info->vertical_coefficients, float);
++
++ if (stbir__use_height_upsampling(info))
++ {
++ info->horizontal_buffer = NULL;
++ info->ring_buffer = STBIR__NEXT_MEMPTR(info->decode_buffer, float);
++ info->encode_buffer = STBIR__NEXT_MEMPTR(info->ring_buffer, float);
++
++ STBIR_ASSERT((size_t)STBIR__NEXT_MEMPTR(info->encode_buffer, unsigned char) == (size_t)tempmem + tempmem_size_in_bytes);
++ }
++ else
++ {
++ info->horizontal_buffer = STBIR__NEXT_MEMPTR(info->decode_buffer, float);
++ info->ring_buffer = STBIR__NEXT_MEMPTR(info->horizontal_buffer, float);
++ info->encode_buffer = NULL;
++
++ STBIR_ASSERT((size_t)STBIR__NEXT_MEMPTR(info->ring_buffer, unsigned char) == (size_t)tempmem + tempmem_size_in_bytes);
++ }
++
++#undef STBIR__NEXT_MEMPTR
++
++ // This signals that the ring buffer is empty
++ info->ring_buffer_begin_index = -1;
++
++ stbir__calculate_filters(info->horizontal_contributors, info->horizontal_coefficients, info->horizontal_filter, info->horizontal_scale, info->horizontal_shift, info->input_w, info->output_w);
++ stbir__calculate_filters(info->vertical_contributors, info->vertical_coefficients, info->vertical_filter, info->vertical_scale, info->vertical_shift, info->input_h, info->output_h);
++
++ STBIR_PROGRESS_REPORT(0);
++
++ if (stbir__use_height_upsampling(info))
++ stbir__buffer_loop_upsample(info);
++ else
++ stbir__buffer_loop_downsample(info);
++
++ STBIR_PROGRESS_REPORT(1);
++
++#ifdef STBIR_DEBUG_OVERWRITE_TEST
++ STBIR_ASSERT(memcmp(overwrite_output_before_pre, &((unsigned char*)output_data)[-OVERWRITE_ARRAY_SIZE], OVERWRITE_ARRAY_SIZE) == 0);
++ STBIR_ASSERT(memcmp(overwrite_output_after_pre, &((unsigned char*)output_data)[begin_forbidden], OVERWRITE_ARRAY_SIZE) == 0);
++ STBIR_ASSERT(memcmp(overwrite_tempmem_before_pre, &((unsigned char*)tempmem)[-OVERWRITE_ARRAY_SIZE], OVERWRITE_ARRAY_SIZE) == 0);
++ STBIR_ASSERT(memcmp(overwrite_tempmem_after_pre, &((unsigned char*)tempmem)[tempmem_size_in_bytes], OVERWRITE_ARRAY_SIZE) == 0);
++#endif
++
++ return 1;
++}
++
++
++static int stbir__resize_arbitrary(
++ void *alloc_context,
++ const void* input_data, int input_w, int input_h, int input_stride_in_bytes,
++ void* output_data, int output_w, int output_h, int output_stride_in_bytes,
++ float s0, float t0, float s1, float t1, float *transform,
++ int channels, int alpha_channel, stbir_uint32 flags, stbir_datatype type,
++ stbir_filter h_filter, stbir_filter v_filter,
++ stbir_edge edge_horizontal, stbir_edge edge_vertical, stbir_colorspace colorspace)
++{
++ stbir__info info;
++ int result;
++ size_t memory_required;
++ void* extra_memory;
++
++ stbir__setup(&info, input_w, input_h, output_w, output_h, channels);
++ stbir__calculate_transform(&info, s0,t0,s1,t1,transform);
++ stbir__choose_filter(&info, h_filter, v_filter);
++ memory_required = stbir__calculate_memory(&info);
++ extra_memory = STBIR_MALLOC(memory_required, alloc_context);
++
++ if (!extra_memory)
++ return 0;
++
++ result = stbir__resize_allocated(&info, input_data, input_stride_in_bytes,
++ output_data, output_stride_in_bytes,
++ alpha_channel, flags, type,
++ edge_horizontal, edge_vertical,
++ colorspace, extra_memory, memory_required);
++
++ STBIR_FREE(extra_memory, alloc_context);
++
++ return result;
++}
++
++STBIRDEF int stbir_resize_uint8( const unsigned char *input_pixels , int input_w , int input_h , int input_stride_in_bytes,
++ unsigned char *output_pixels, int output_w, int output_h, int output_stride_in_bytes,
++ int num_channels)
++{
++ return stbir__resize_arbitrary(NULL, input_pixels, input_w, input_h, input_stride_in_bytes,
++ output_pixels, output_w, output_h, output_stride_in_bytes,
++ 0,0,1,1,NULL,num_channels,-1,0, STBIR_TYPE_UINT8, STBIR_FILTER_DEFAULT, STBIR_FILTER_DEFAULT,
++ STBIR_EDGE_CLAMP, STBIR_EDGE_CLAMP, STBIR_COLORSPACE_LINEAR);
++}
++
++STBIRDEF int stbir_resize_float( const float *input_pixels , int input_w , int input_h , int input_stride_in_bytes,
++ float *output_pixels, int output_w, int output_h, int output_stride_in_bytes,
++ int num_channels)
++{
++ return stbir__resize_arbitrary(NULL, input_pixels, input_w, input_h, input_stride_in_bytes,
++ output_pixels, output_w, output_h, output_stride_in_bytes,
++ 0,0,1,1,NULL,num_channels,-1,0, STBIR_TYPE_FLOAT, STBIR_FILTER_DEFAULT, STBIR_FILTER_DEFAULT,
++ STBIR_EDGE_CLAMP, STBIR_EDGE_CLAMP, STBIR_COLORSPACE_LINEAR);
++}
++
++STBIRDEF int stbir_resize_uint8_srgb(const unsigned char *input_pixels , int input_w , int input_h , int input_stride_in_bytes,
++ unsigned char *output_pixels, int output_w, int output_h, int output_stride_in_bytes,
++ int num_channels, int alpha_channel, int flags)
++{
++ return stbir__resize_arbitrary(NULL, input_pixels, input_w, input_h, input_stride_in_bytes,
++ output_pixels, output_w, output_h, output_stride_in_bytes,
++ 0,0,1,1,NULL,num_channels,alpha_channel,flags, STBIR_TYPE_UINT8, STBIR_FILTER_DEFAULT, STBIR_FILTER_DEFAULT,
++ STBIR_EDGE_CLAMP, STBIR_EDGE_CLAMP, STBIR_COLORSPACE_SRGB);
++}
++
++STBIRDEF int stbir_resize_uint8_srgb_edgemode(const unsigned char *input_pixels , int input_w , int input_h , int input_stride_in_bytes,
++ unsigned char *output_pixels, int output_w, int output_h, int output_stride_in_bytes,
++ int num_channels, int alpha_channel, int flags,
++ stbir_edge edge_wrap_mode)
++{
++ return stbir__resize_arbitrary(NULL, input_pixels, input_w, input_h, input_stride_in_bytes,
++ output_pixels, output_w, output_h, output_stride_in_bytes,
++ 0,0,1,1,NULL,num_channels,alpha_channel,flags, STBIR_TYPE_UINT8, STBIR_FILTER_DEFAULT, STBIR_FILTER_DEFAULT,
++ edge_wrap_mode, edge_wrap_mode, STBIR_COLORSPACE_SRGB);
++}
++
++STBIRDEF int stbir_resize_uint8_generic( const unsigned char *input_pixels , int input_w , int input_h , int input_stride_in_bytes,
++ unsigned char *output_pixels, int output_w, int output_h, int output_stride_in_bytes,
++ int num_channels, int alpha_channel, int flags,
++ stbir_edge edge_wrap_mode, stbir_filter filter, stbir_colorspace space,
++ void *alloc_context)
++{
++ return stbir__resize_arbitrary(alloc_context, input_pixels, input_w, input_h, input_stride_in_bytes,
++ output_pixels, output_w, output_h, output_stride_in_bytes,
++ 0,0,1,1,NULL,num_channels,alpha_channel,flags, STBIR_TYPE_UINT8, filter, filter,
++ edge_wrap_mode, edge_wrap_mode, space);
++}
++
++STBIRDEF int stbir_resize_uint16_generic(const stbir_uint16 *input_pixels , int input_w , int input_h , int input_stride_in_bytes,
++ stbir_uint16 *output_pixels , int output_w, int output_h, int output_stride_in_bytes,
++ int num_channels, int alpha_channel, int flags,
++ stbir_edge edge_wrap_mode, stbir_filter filter, stbir_colorspace space,
++ void *alloc_context)
++{
++ return stbir__resize_arbitrary(alloc_context, input_pixels, input_w, input_h, input_stride_in_bytes,
++ output_pixels, output_w, output_h, output_stride_in_bytes,
++ 0,0,1,1,NULL,num_channels,alpha_channel,flags, STBIR_TYPE_UINT16, filter, filter,
++ edge_wrap_mode, edge_wrap_mode, space);
++}
++
++
++STBIRDEF int stbir_resize_float_generic( const float *input_pixels , int input_w , int input_h , int input_stride_in_bytes,
++ float *output_pixels , int output_w, int output_h, int output_stride_in_bytes,
++ int num_channels, int alpha_channel, int flags,
++ stbir_edge edge_wrap_mode, stbir_filter filter, stbir_colorspace space,
++ void *alloc_context)
++{
++ return stbir__resize_arbitrary(alloc_context, input_pixels, input_w, input_h, input_stride_in_bytes,
++ output_pixels, output_w, output_h, output_stride_in_bytes,
++ 0,0,1,1,NULL,num_channels,alpha_channel,flags, STBIR_TYPE_FLOAT, filter, filter,
++ edge_wrap_mode, edge_wrap_mode, space);
++}
++
++
++STBIRDEF int stbir_resize( const void *input_pixels , int input_w , int input_h , int input_stride_in_bytes,
++ void *output_pixels, int output_w, int output_h, int output_stride_in_bytes,
++ stbir_datatype datatype,
++ int num_channels, int alpha_channel, int flags,
++ stbir_edge edge_mode_horizontal, stbir_edge edge_mode_vertical,
++ stbir_filter filter_horizontal, stbir_filter filter_vertical,
++ stbir_colorspace space, void *alloc_context)
++{
++ return stbir__resize_arbitrary(alloc_context, input_pixels, input_w, input_h, input_stride_in_bytes,
++ output_pixels, output_w, output_h, output_stride_in_bytes,
++ 0,0,1,1,NULL,num_channels,alpha_channel,flags, datatype, filter_horizontal, filter_vertical,
++ edge_mode_horizontal, edge_mode_vertical, space);
++}
++
++
++STBIRDEF int stbir_resize_subpixel(const void *input_pixels , int input_w , int input_h , int input_stride_in_bytes,
++ void *output_pixels, int output_w, int output_h, int output_stride_in_bytes,
++ stbir_datatype datatype,
++ int num_channels, int alpha_channel, int flags,
++ stbir_edge edge_mode_horizontal, stbir_edge edge_mode_vertical,
++ stbir_filter filter_horizontal, stbir_filter filter_vertical,
++ stbir_colorspace space, void *alloc_context,
++ float x_scale, float y_scale,
++ float x_offset, float y_offset)
++{
++ float transform[4];
++ transform[0] = x_scale;
++ transform[1] = y_scale;
++ transform[2] = x_offset;
++ transform[3] = y_offset;
++ return stbir__resize_arbitrary(alloc_context, input_pixels, input_w, input_h, input_stride_in_bytes,
++ output_pixels, output_w, output_h, output_stride_in_bytes,
++ 0,0,1,1,transform,num_channels,alpha_channel,flags, datatype, filter_horizontal, filter_vertical,
++ edge_mode_horizontal, edge_mode_vertical, space);
++}
++
++STBIRDEF int stbir_resize_region( const void *input_pixels , int input_w , int input_h , int input_stride_in_bytes,
++ void *output_pixels, int output_w, int output_h, int output_stride_in_bytes,
++ stbir_datatype datatype,
++ int num_channels, int alpha_channel, int flags,
++ stbir_edge edge_mode_horizontal, stbir_edge edge_mode_vertical,
++ stbir_filter filter_horizontal, stbir_filter filter_vertical,
++ stbir_colorspace space, void *alloc_context,
++ float s0, float t0, float s1, float t1)
++{
++ return stbir__resize_arbitrary(alloc_context, input_pixels, input_w, input_h, input_stride_in_bytes,
++ output_pixels, output_w, output_h, output_stride_in_bytes,
++ s0,t0,s1,t1,NULL,num_channels,alpha_channel,flags, datatype, filter_horizontal, filter_vertical,
++ edge_mode_horizontal, edge_mode_vertical, space);
++}
++
++#endif // STB_IMAGE_RESIZE_IMPLEMENTATION
++
++/*
++------------------------------------------------------------------------------
++This software is available under 2 licenses -- choose whichever you prefer.
++------------------------------------------------------------------------------
++ALTERNATIVE A - MIT License
++Copyright (c) 2017 Sean Barrett
++Permission is hereby granted, free of charge, to any person obtaining a copy of
++this software and associated documentation files (the "Software"), to deal in
++the Software without restriction, including without limitation the rights to
++use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies
++of the Software, and to permit persons to whom the Software is furnished to do
++so, subject to the following conditions:
++The above copyright notice and this permission notice shall be included in all
++copies or substantial portions of the Software.
++THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
++IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
++FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
++AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
++LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
++OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
++SOFTWARE.
++------------------------------------------------------------------------------
++ALTERNATIVE B - Public Domain (www.unlicense.org)
++This is free and unencumbered software released into the public domain.
++Anyone is free to copy, modify, publish, use, compile, sell, or distribute this
++software, either in source code form or as a compiled binary, for any purpose,
++commercial or non-commercial, and by any means.
++In jurisdictions that recognize copyright laws, the author or authors of this
++software dedicate any and all copyright interest in the software to the public
++domain. We make this dedication for the benefit of the public at large and to
++the detriment of our heirs and successors. We intend this dedication to be an
++overt act of relinquishment in perpetuity of all present and future rights to
++this software under copyright law.
++THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
++IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
++FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
++AUTHORS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
++ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
++WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
++------------------------------------------------------------------------------
++*/
+diff --git a/src/euphoria/CMakeLists.txt b/src/euphoria/CMakeLists.txt
+index a092bc2..d3f55ee 100644
+--- a/src/euphoria/CMakeLists.txt
++++ b/src/euphoria/CMakeLists.txt
+@@ -1,9 +1,6 @@
++cmake_minimum_required(VERSION 3.5)
+ project(screensaver.rsxs.euphoria)
+
+-cmake_minimum_required(VERSION 3.0)
+-
+-enable_language(CXX)
+-
+ message(STATUS "--------------------------------------------------------------------------------")
+ message(STATUS "Create \"${CMAKE_PROJECT_NAME}\"")
+
+diff --git a/src/feedback/CMakeLists.txt b/src/feedback/CMakeLists.txt
+index 1ffb833..b37c430 100644
+--- a/src/feedback/CMakeLists.txt
++++ b/src/feedback/CMakeLists.txt
+@@ -1,9 +1,6 @@
++cmake_minimum_required(VERSION 3.5)
+ project(screensaver.rsxs.feedback)
+
+-cmake_minimum_required(VERSION 3.0)
+-
+-enable_language(CXX)
+-
+ message(STATUS "--------------------------------------------------------------------------------")
+ message(STATUS "Create \"${CMAKE_PROJECT_NAME}\"")
+
+diff --git a/src/fieldlines/CMakeLists.txt b/src/fieldlines/CMakeLists.txt
+index 4a69333..de60dda 100644
+--- a/src/fieldlines/CMakeLists.txt
++++ b/src/fieldlines/CMakeLists.txt
+@@ -1,9 +1,6 @@
++cmake_minimum_required(VERSION 3.5)
+ project(screensaver.rsxs.fieldlines)
+
+-cmake_minimum_required(VERSION 3.0)
+-
+-enable_language(CXX)
+-
+ message(STATUS "--------------------------------------------------------------------------------")
+ message(STATUS "Create \"${CMAKE_PROJECT_NAME}\"")
+
+diff --git a/src/flocks/CMakeLists.txt b/src/flocks/CMakeLists.txt
+index b3a5305..c2b4a79 100644
+--- a/src/flocks/CMakeLists.txt
++++ b/src/flocks/CMakeLists.txt
+@@ -1,9 +1,6 @@
++cmake_minimum_required(VERSION 3.5)
+ project(screensaver.rsxs.flocks)
+
+-cmake_minimum_required(VERSION 3.0)
+-
+-enable_language(CXX)
+-
+ message(STATUS "--------------------------------------------------------------------------------")
+ message(STATUS "Create \"${CMAKE_PROJECT_NAME}\"")
+
+diff --git a/src/flux/CMakeLists.txt b/src/flux/CMakeLists.txt
+index b3f08ab..a2de0b2 100644
+--- a/src/flux/CMakeLists.txt
++++ b/src/flux/CMakeLists.txt
+@@ -1,9 +1,6 @@
++cmake_minimum_required(VERSION 3.5)
+ project(screensaver.rsxs.flux)
+
+-cmake_minimum_required(VERSION 3.0)
+-
+-enable_language(CXX)
+-
+ message(STATUS "--------------------------------------------------------------------------------")
+ message(STATUS "Create \"${CMAKE_PROJECT_NAME}\"")
+
+diff --git a/src/helios/CMakeLists.txt b/src/helios/CMakeLists.txt
+index 5286c8b..d64a619 100644
+--- a/src/helios/CMakeLists.txt
++++ b/src/helios/CMakeLists.txt
+@@ -1,9 +1,6 @@
++cmake_minimum_required(VERSION 3.5)
+ project(screensaver.rsxs.helios)
+
+-cmake_minimum_required(VERSION 3.0)
+-
+-enable_language(CXX)
+-
+ message(STATUS "--------------------------------------------------------------------------------")
+ message(STATUS "Create \"${CMAKE_PROJECT_NAME}\"")
+
+diff --git a/src/hufosmoke/CMakeLists.txt b/src/hufosmoke/CMakeLists.txt
+index bac1e3a..44d1323 100644
+--- a/src/hufosmoke/CMakeLists.txt
++++ b/src/hufosmoke/CMakeLists.txt
+@@ -1,9 +1,6 @@
++cmake_minimum_required(VERSION 3.5)
+ project(screensaver.rsxs.hufosmoke)
+
+-cmake_minimum_required(VERSION 3.3)
+-
+-enable_language(CXX)
+-
+ message(STATUS "--------------------------------------------------------------------------------")
+ message(STATUS "Create \"${CMAKE_PROJECT_NAME}\"")
+
+diff --git a/src/hufotunnel/CMakeLists.txt b/src/hufotunnel/CMakeLists.txt
+index 3074360..af5ed2c 100644
+--- a/src/hufotunnel/CMakeLists.txt
++++ b/src/hufotunnel/CMakeLists.txt
+@@ -1,9 +1,6 @@
++cmake_minimum_required(VERSION 3.5)
+ project(screensaver.rsxs.hufotunnel)
+
+-cmake_minimum_required(VERSION 3.0)
+-
+-enable_language(CXX)
+-
+ message(STATUS "--------------------------------------------------------------------------------")
+ message(STATUS "Create \"${CMAKE_PROJECT_NAME}\"")
+
+diff --git a/src/hyperspace/CMakeLists.txt b/src/hyperspace/CMakeLists.txt
+index f3e19d8..6bd303e 100644
+--- a/src/hyperspace/CMakeLists.txt
++++ b/src/hyperspace/CMakeLists.txt
+@@ -1,9 +1,6 @@
++cmake_minimum_required(VERSION 3.5)
+ project(screensaver.rsxs.hyperspace)
+
+-cmake_minimum_required(VERSION 3.0)
+-
+-enable_language(CXX)
+-
+ message(STATUS "--------------------------------------------------------------------------------")
+ message(STATUS "Create \"${CMAKE_PROJECT_NAME}\"")
+
+diff --git a/src/lattice/CMakeLists.txt b/src/lattice/CMakeLists.txt
+index 11586a1..ef884e4 100644
+--- a/src/lattice/CMakeLists.txt
++++ b/src/lattice/CMakeLists.txt
+@@ -1,9 +1,6 @@
++cmake_minimum_required(VERSION 3.5)
+ project(screensaver.rsxs.lattice)
+
+-cmake_minimum_required(VERSION 3.0)
+-
+-enable_language(CXX)
+-
+ message(STATUS "--------------------------------------------------------------------------------")
+ message(STATUS "Create \"${CMAKE_PROJECT_NAME}\"")
+
+diff --git a/src/lorenz/CMakeLists.txt b/src/lorenz/CMakeLists.txt
+index 11816dc..ab3026f 100644
+--- a/src/lorenz/CMakeLists.txt
++++ b/src/lorenz/CMakeLists.txt
+@@ -1,9 +1,6 @@
++cmake_minimum_required(VERSION 3.5)
+ project(screensaver.rsxs.lorenz)
+
+-cmake_minimum_required(VERSION 3.0)
+-
+-enable_language(CXX)
+-
+ message(STATUS "--------------------------------------------------------------------------------")
+ message(STATUS "Create \"${CMAKE_PROJECT_NAME}\"")
+
+diff --git a/src/matrixview/CMakeLists.txt b/src/matrixview/CMakeLists.txt
+index 1ce4ca8..d98a8f1 100644
+--- a/src/matrixview/CMakeLists.txt
++++ b/src/matrixview/CMakeLists.txt
+@@ -1,9 +1,6 @@
++cmake_minimum_required(VERSION 3.5)
+ project(screensaver.rsxs.matrixview)
+
+-cmake_minimum_required(VERSION 3.0)
+-
+-enable_language(CXX)
+-
+ message(STATUS "--------------------------------------------------------------------------------")
+ message(STATUS "Create \"${CMAKE_PROJECT_NAME}\"")
+
+diff --git a/src/microcosm/CMakeLists.txt b/src/microcosm/CMakeLists.txt
+index 75e0dba..d05b639 100644
+--- a/src/microcosm/CMakeLists.txt
++++ b/src/microcosm/CMakeLists.txt
+@@ -1,9 +1,6 @@
++cmake_minimum_required(VERSION 3.5)
+ project(screensaver.rsxs.microcosm)
+
+-cmake_minimum_required(VERSION 3.0)
+-
+-enable_language(CXX)
+-
+ message(STATUS "--------------------------------------------------------------------------------")
+ message(STATUS "Create \"${CMAKE_PROJECT_NAME}\"")
+
+diff --git a/src/plasma/CMakeLists.txt b/src/plasma/CMakeLists.txt
+index 153ef44..e7fc795 100644
+--- a/src/plasma/CMakeLists.txt
++++ b/src/plasma/CMakeLists.txt
+@@ -1,9 +1,6 @@
++cmake_minimum_required(VERSION 3.5)
+ project(screensaver.rsxs.plasma)
+
+-cmake_minimum_required(VERSION 3.0)
+-
+-enable_language(CXX)
+-
+ message(STATUS "--------------------------------------------------------------------------------")
+ message(STATUS "Create \"${CMAKE_PROJECT_NAME}\"")
+
+diff --git a/src/skyrocket/CMakeLists.txt b/src/skyrocket/CMakeLists.txt
+index 3d2b497..8a89f28 100644
+--- a/src/skyrocket/CMakeLists.txt
++++ b/src/skyrocket/CMakeLists.txt
+@@ -1,9 +1,6 @@
++cmake_minimum_required(VERSION 3.5)
+ project(screensaver.rsxs.skyrocket)
+
+-cmake_minimum_required(VERSION 3.0)
+-
+-enable_language(CXX)
+-
+ message(STATUS "--------------------------------------------------------------------------------")
+ message(STATUS "Create \"${CMAKE_PROJECT_NAME}\"")
+
+diff --git a/src/solarwinds/CMakeLists.txt b/src/solarwinds/CMakeLists.txt
+index f13c736..f1ef41c 100644
+--- a/src/solarwinds/CMakeLists.txt
++++ b/src/solarwinds/CMakeLists.txt
+@@ -1,9 +1,6 @@
++cmake_minimum_required(VERSION 3.5)
+ project(screensaver.rsxs.solarwinds)
+
+-cmake_minimum_required(VERSION 3.0)
+-
+-enable_language(CXX)
+-
+ message(STATUS "--------------------------------------------------------------------------------")
+ message(STATUS "Create \"${CMAKE_PROJECT_NAME}\"")
+
+diff --git a/src/spirographx/CMakeLists.txt b/src/spirographx/CMakeLists.txt
+index 32f281c..2ccb751 100644
+--- a/src/spirographx/CMakeLists.txt
++++ b/src/spirographx/CMakeLists.txt
+@@ -1,9 +1,6 @@
++cmake_minimum_required(VERSION 3.5)
+ project(screensaver.rsxs.spirographx)
+
+-cmake_minimum_required(VERSION 3.0)
+-
+-enable_language(CXX)
+-
+ message(STATUS "--------------------------------------------------------------------------------")
+ message(STATUS "Create \"${CMAKE_PROJECT_NAME}\"")
+
+diff --git a/src/sundancer2/CMakeLists.txt b/src/sundancer2/CMakeLists.txt
+index a9d6470..a0e47a6 100644
+--- a/src/sundancer2/CMakeLists.txt
++++ b/src/sundancer2/CMakeLists.txt
+@@ -1,9 +1,6 @@
++cmake_minimum_required(VERSION 3.5)
+ project(screensaver.rsxs.sundancer2)
+
+-cmake_minimum_required(VERSION 3.0)
+-
+-enable_language(CXX)
+-
+ message(STATUS "--------------------------------------------------------------------------------")
+ message(STATUS "Create \"${CMAKE_PROJECT_NAME}\"")
+
+
+From ed08432af0af17096ed03d57ed9688c79e84dbe4 Mon Sep 17 00:00:00 2001
+From: Alwin Esch <alwin.esch at web.de>
+Date: Tue, 19 Mar 2019 18:35:29 +0100
+Subject: [PATCH 3/3] update Jenkinsfile to handle multiple addons in one
+
+---
+ Jenkinsfile | 2 +-
+ 1 file changed, 1 insertion(+), 1 deletion(-)
+
+diff --git a/Jenkinsfile b/Jenkinsfile
+index 43a94b4..e44c5f8 100644
+--- a/Jenkinsfile
++++ b/Jenkinsfile
+@@ -1 +1 @@
+-buildPlugin(platforms: ['android-armv7', 'android-aarch64', 'ios-armv7', 'ios-aarch64', 'osx-x86_64', 'ubuntu-ppa'])
++buildPlugin(archive: 'screensaver.rsxs.*', platforms: ['android-armv7', 'android-aarch64', 'ios-armv7', 'ios-aarch64', 'osx-x86_64', 'ubuntu-ppa'])
diff --git a/package/kodi-screensaver-rsxs/0002-fix-default-include-dir.patch b/package/kodi-screensaver-rsxs/0002-fix-default-include-dir.patch
deleted file mode 100644
index a7e7c74b0f..0000000000
--- a/package/kodi-screensaver-rsxs/0002-fix-default-include-dir.patch
+++ /dev/null
@@ -1,28 +0,0 @@
-Fix X include path to prevent error during configure
-
-Downloaded from
-https://github.com/LibreELEC/LibreELEC.tv/blob/master/packages/mediacenter/kodi-binary-addons/screensavers.rsxs/patches/screensavers.rsxs-0002-fix-default-include-dir.patch
-
-Signed-off-by: Bernd Kuhls <bernd.kuhls at t-online.de>
-
-diff -Naur screensavers.rsxs-3241d29.orig/CMakeLists.txt screensavers.rsxs-3241d29/CMakeLists.txt
---- screensavers.rsxs-3241d29.orig/CMakeLists.txt 2015-10-22 23:59:38.187280475 -0700
-+++ screensavers.rsxs-3241d29/CMakeLists.txt 2015-10-23 00:00:27.228113829 -0700
-@@ -17,7 +17,7 @@
- include_directories(${OpenGL_INCLUDE_DIR}
- ${PNG_INCLUDE_DIR}
- ${KODI_INCLUDE_DIR}
-- ${X_INCLUDE_DIRS}
-+ ${X_INCLUDE_DIR}
- ${CMAKE_BINARY_DIR}/rsxs-prefix/src/rsxs-build
- ${PROJECT_SOURCE_DIR}/${rsxs_dir}/src
- ${PROJECT_SOURCE_DIR}/${rsxs_dir}/lib
-@@ -67,7 +67,7 @@
- --disable-skyrocket
- --disable-solarwinds
- --disable-sound
-- --x-includes=${X_INCLUDE_DIRS}
-+ --x-includes=${X_INCLUDE_DIR}
- --x-libraries=${X_LIBRARIES}
- ${PNG_PATH}
- ${EXTRA_FLAGS}
diff --git a/package/kodi-screensaver-rsxs/Config.in b/package/kodi-screensaver-rsxs/Config.in
index c523ce5a1c..60723af016 100644
--- a/package/kodi-screensaver-rsxs/Config.in
+++ b/package/kodi-screensaver-rsxs/Config.in
@@ -2,12 +2,14 @@ config BR2_PACKAGE_KODI_SCREENSAVER_RSXS
bool "kodi-screensaver-rsxs"
depends on BR2_PACKAGE_HAS_LIBGL # libglu
depends on BR2_PACKAGE_XORG7 # xlib_libXmu
- select BR2_PACKAGE_LIBPNG
+ select BR2_PACKAGE_BZIP2
+ select BR2_PACKAGE_GLI
+ select BR2_PACKAGE_GLM
select BR2_PACKAGE_XLIB_LIBXMU
help
RSXS screensaver add-ons for Kodi
- https://github.com/notspiff/screensavers.rsxs
+ https://github.com/xbmc/screensavers.rsxs
comment "kodi-screensaver-rsxs depends on X.org and needs OpenGL"
depends on !BR2_PACKAGE_XORG7 || !BR2_PACKAGE_HAS_LIBGL
diff --git a/package/kodi-screensaver-rsxs/kodi-screensaver-rsxs.hash b/package/kodi-screensaver-rsxs/kodi-screensaver-rsxs.hash
index e80c972ebb..b2d9e33a57 100644
--- a/package/kodi-screensaver-rsxs/kodi-screensaver-rsxs.hash
+++ b/package/kodi-screensaver-rsxs/kodi-screensaver-rsxs.hash
@@ -1,2 +1,2 @@
# Locally computed
-sha256 8436c29d2f42bc65ff6f1abc2f1d05a613cc2ebb16d793e02b1f2bee296952a6 kodi-screensaver-rsxs-1.3.0.tar.gz
+sha256 22ff3f0ca9679c59ce1a90b98d918dd10a8012b789729b2e44c04d4ce8c86ad8 kodi-screensaver-rsxs-7cb648507440d87948dec10d5bfdab3b722d37fe.tar.gz
diff --git a/package/kodi-screensaver-rsxs/kodi-screensaver-rsxs.mk b/package/kodi-screensaver-rsxs/kodi-screensaver-rsxs.mk
index 64ffb4fba6..7f9bc4d52d 100644
--- a/package/kodi-screensaver-rsxs/kodi-screensaver-rsxs.mk
+++ b/package/kodi-screensaver-rsxs/kodi-screensaver-rsxs.mk
@@ -4,10 +4,9 @@
#
################################################################################
-KODI_SCREENSAVER_RSXS_VERSION = 1.3.0
-KODI_SCREENSAVER_RSXS_SITE = $(call github,notspiff,screensavers.rsxs,v$(KODI_SCREENSAVER_RSXS_VERSION))
+KODI_SCREENSAVER_RSXS_VERSION = 7cb648507440d87948dec10d5bfdab3b722d37fe
+KODI_SCREENSAVER_RSXS_SITE = $(call github,xbmc,screensavers.rsxs,$(KODI_SCREENSAVER_RSXS_VERSION))
KODI_SCREENSAVER_RSXS_LICENSE = GPL-3.0
-KODI_SCREENSAVER_RSXS_LICENSE_FILES = lib/rsxs-1.0/COPYING
-KODI_SCREENSAVER_RSXS_DEPENDENCIES = kodi libpng xlib_libXmu
+KODI_SCREENSAVER_RSXS_DEPENDENCIES = bzip2 gli glm kodi xlib_libXmu
$(eval $(cmake-package))
--
2.20.1
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