Add libavif support for iOS (#9117)

Co-authored-by: Andrew Murray <radarhere@users.noreply.github.com>
This commit is contained in:
Russell Keith-Magee 2025-08-02 20:10:55 +08:00 committed by GitHub
parent 2ab301dcc9
commit 148e1ac914
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2 changed files with 29 additions and 13 deletions

View File

@ -186,30 +186,43 @@ function build_libavif {
python3 -m pip install meson ninja
if [[ "$PLAT" == "x86_64" ]] || [ -n "$SANITIZER" ]; then
if ([[ "$PLAT" == "x86_64" ]] && [[ -z "$IOS_SDK" ]]) || [ -n "$SANITIZER" ]; then
build_simple nasm 2.16.03 https://www.nasm.us/pub/nasm/releasebuilds/2.16.03
fi
local build_type=MinSizeRel
local build_shared=ON
local lto=ON
local libavif_cmake_flags
if [ -n "$IS_MACOS" ]; then
if [[ -n "$IS_MACOS" ]]; then
lto=OFF
libavif_cmake_flags=(
-DCMAKE_C_FLAGS_MINSIZEREL="-Oz -DNDEBUG -flto" \
-DCMAKE_CXX_FLAGS_MINSIZEREL="-Oz -DNDEBUG -flto" \
-DCMAKE_SHARED_LINKER_FLAGS_INIT="-Wl,-S,-x,-dead_strip_dylibs" \
)
if [[ -n "$IOS_SDK" ]]; then
build_shared=OFF
fi
else
if [[ "$MB_ML_VER" == 2014 ]] && [[ "$PLAT" == "x86_64" ]]; then
build_type=Release
fi
libavif_cmake_flags=(-DCMAKE_SHARED_LINKER_FLAGS_INIT="-Wl,--strip-all,-z,relro,-z,now")
fi
if [[ -n "$IOS_SDK" ]] && [[ "$PLAT" == "x86_64" ]]; then
libavif_cmake_flags+=(-DAOM_TARGET_CPU=generic)
else
libavif_cmake_flags+=(
-DAVIF_CODEC_AOM_DECODE=OFF \
-DAVIF_CODEC_DAV1D=LOCAL
)
fi
local out_dir=$(fetch_unpack https://github.com/AOMediaCodec/libavif/archive/refs/tags/v$LIBAVIF_VERSION.tar.gz libavif-$LIBAVIF_VERSION.tar.gz)
# CONFIG_AV1_HIGHBITDEPTH=0 is a flag for libaom (included as a subproject
# of libavif) that disables support for encoding high bit depth images.
(cd $out_dir \
@ -217,20 +230,27 @@ function build_libavif {
-DCMAKE_INSTALL_PREFIX=$BUILD_PREFIX \
-DCMAKE_INSTALL_LIBDIR=$BUILD_PREFIX/lib \
-DCMAKE_INSTALL_NAME_DIR=$BUILD_PREFIX/lib \
-DBUILD_SHARED_LIBS=ON \
-DBUILD_SHARED_LIBS=$build_shared \
-DAVIF_LIBSHARPYUV=LOCAL \
-DAVIF_LIBYUV=LOCAL \
-DAVIF_CODEC_AOM=LOCAL \
-DCONFIG_AV1_HIGHBITDEPTH=0 \
-DAVIF_CODEC_AOM_DECODE=OFF \
-DAVIF_CODEC_DAV1D=LOCAL \
-DCMAKE_INTERPROCEDURAL_OPTIMIZATION=$lto \
-DCMAKE_C_VISIBILITY_PRESET=hidden \
-DCMAKE_CXX_VISIBILITY_PRESET=hidden \
-DCMAKE_BUILD_TYPE=$build_type \
"${libavif_cmake_flags[@]}" \
. \
&& make install)
$HOST_CMAKE_FLAGS . )
if [[ -n "$IOS_SDK" ]]; then
# libavif's CMake configuration generates a meson cross file... but it
# doesn't work for iOS cross-compilation. Copy in Pillow-generated
# meson-cross config to replace the cmake-generated version.
cp $WORKDIR/meson-cross.txt $out_dir/crossfile-apple.meson
fi
(cd $out_dir && make install)
touch libavif-stamp
}
@ -268,10 +288,7 @@ function build {
build_tiff
fi
if [[ -z "$IOS_SDK" ]]; then
# Short term workaround; don't build libavif on iOS
build_libavif
fi
build_libavif
build_libpng
build_lcms2
build_openjpeg

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@ -25,8 +25,7 @@ def test_wheel_modules() -> None:
elif sys.platform == "ios":
# tkinter is not available on iOS
# libavif is not available on iOS (for now)
expected_modules -= {"tkinter", "avif"}
expected_modules.remove("tkinter")
assert set(features.get_supported_modules()) == expected_modules