blob: 68da194b0a46e9ec41431483744a34438eb2954d [file] [log] [blame]
#!/bin/bash
# Copyright 2020 Google LLC
#
# Use of this source code is governed by a BSD-style license that can be
# found in the LICENSE file.
set -ex
BASE_DIR=`cd $(dirname ${BASH_SOURCE[0]}) && pwd`
# This expects the environment variable EMSDK to be set
if [[ ! -d $EMSDK ]]; then
cat >&2 << "EOF"
Be sure to set the EMSDK environment variable to the location of Emscripten SDK:
https://emscripten.org/docs/getting_started/downloads.html
EOF
exit 1
fi
# Navigate to SKIA_HOME from where this file is located.
pushd $BASE_DIR/../..
source $EMSDK/emsdk_env.sh
EMCC=`which emcc`
EMCXX=`which em++`
EMAR=`which emar`
RELEASE_CONF="-Oz --closure 1 --llvm-lto 1 -DSK_RELEASE --pre-js $BASE_DIR/release.js \
-DGR_GL_CHECK_ALLOC_WITH_GET_ERROR=0 -DSK_DISABLE_TRACING"
EXTRA_CFLAGS="\"-DSK_RELEASE\", \"-DSK_DISABLE_TRACING\""
IS_OFFICIAL_BUILD="true"
if [[ $@ == *full-build* ]]; then
# Full Skottie with all bells and whistles.
BUILD_TYPE="full"
BUILD_CFG="\
skia_enable_fontmgr_custom_embedded=true \
skia_enable_fontmgr_custom_empty=false \
skia_use_freetype=true \
skia_use_libgifcodec=true \
skia_use_harfbuzz=true \
skia_use_icu=true \
skia_use_libpng_decode=true \
skia_use_wuffs=true \
skia_use_zlib=true \
\
skia_use_system_freetype2=false \
skia_use_system_harfbuzz=false \
skia_use_system_icu=false \
skia_use_system_libpng=false \
skia_use_system_zlib=false\
"
else
# Smallest usable Skottie.
BUILD_TYPE="minimal"
BUILD_CFG="\
skia_enable_fontmgr_custom_embedded=false \
skia_enable_fontmgr_custom_empty=true \
skia_use_freetype=false \
skia_use_libgifcodec=false \
skia_use_harfbuzz=false \
skia_use_icu=false \
skia_use_libpng_decode=false \
skia_use_wuffs=false \
skia_use_zlib=false \
"
fi
if [[ $@ == *debug* ]]; then
echo "Building a *${BUILD_TYPE}* Debug build"
EXTRA_CFLAGS="\"-DSK_DEBUG\""
RELEASE_CONF="-O0 --js-opts 0 -s DEMANGLE_SUPPORT=1 -s ASSERTIONS=1 -s GL_ASSERTIONS=1 -g4 \
--source-map-base /bin/ -DSK_DEBUG --pre-js $BASE_DIR/debug.js"
BUILD_DIR=${BUILD_DIR:="out/skottiekit_debug"}
elif [[ $@ == *profiling* ]]; then
echo "Building a *${BUILD_TYPE}* build for profiling"
RELEASE_CONF+=" --profiling-funcs --closure 0"
BUILD_DIR=${BUILD_DIR:="out/skottiekit_profile"}
else
BUILD_DIR=${BUILD_DIR:="out/skottiekit"}
fi
mkdir -p $BUILD_DIR
# sometimes the .a files keep old symbols around - cleaning them out makes sure
# we get a fresh build.
rm -f $BUILD_DIR/*.a
GN_GPU="skia_enable_gpu=true skia_gl_standard = \"webgl\""
GN_GPU_FLAGS="\"-DSK_DISABLE_LEGACY_SHADERCONTEXT\","
WASM_GPU="-lEGL -lGL -lGLESv2 -DSK_SUPPORT_GPU=1 -DSK_GL \
-DSK_DISABLE_LEGACY_SHADERCONTEXT --pre-js $BASE_DIR/cpu.js --pre-js $BASE_DIR/gpu.js\
-s USE_WEBGL2=1"
if [[ $@ == *cpu* ]]; then
echo "Using the CPU backend instead of the GPU backend"
GN_GPU="skia_enable_gpu=false"
GN_GPU_FLAGS=""
WASM_GPU="-DSK_SUPPORT_GPU=0 --pre-js $BASE_DIR/cpu.js -s USE_WEBGL2=0"
fi
SKOTTIE_LIB="$BUILD_DIR/libskottie.a \
$BUILD_DIR/libsksg.a"
MANAGED_SKOTTIE_BINDINGS="\
-DSK_INCLUDE_MANAGED_SKOTTIE=1 \
modules/skottie/utils/SkottieUtils.cpp"
if [[ $@ == *no_managed_skottie* ]]; then
echo "Omitting managed Skottie"
MANAGED_SKOTTIE_BINDINGS="-DSK_INCLUDE_MANAGED_SKOTTIE=0"
fi
# Turn off exiting while we check for ninja (which may not be on PATH)
set +e
NINJA=`which ninja`
if [[ -z $NINJA ]]; then
git clone "https://chromium.googlesource.com/chromium/tools/depot_tools.git" --depth 1 $BUILD_DIR/depot_tools
NINJA=$BUILD_DIR/depot_tools/ninja
fi
# Re-enable error checking
set -e
./bin/fetch-gn
echo "Compiling bitcode"
# Inspired by https://github.com/Zubnix/skia-wasm-port/blob/master/build_bindings.sh
./bin/gn gen ${BUILD_DIR} \
--args="cc=\"${EMCC}\" \
cxx=\"${EMCXX}\" \
ar=\"${EMAR}\" \
extra_cflags_cc=[\"-frtti\"] \
extra_cflags=[\"-s\", \"WARN_UNALIGNED=1\", \"-s\", \"MAIN_MODULE=1\",
\"-DSKNX_NO_SIMD\", \"-DSK_DISABLE_AAA\",
\"-DSK_DISABLE_EFFECT_DESERIALIZATION\",
\"-DSK_FORCE_8_BYTE_ALIGNMENT\",
${GN_GPU_FLAGS}
${EXTRA_CFLAGS}
] \
is_debug=false \
is_official_build=${IS_OFFICIAL_BUILD} \
is_component_build=false \
werror=true \
target_cpu=\"wasm\" \
\
${BUILD_CFG} \
skia_use_angle=false \
skia_use_dng_sdk=false \
skia_use_egl=true \
skia_use_expat=false \
skia_use_fontconfig=false \
skia_use_libheif=false \
skia_use_libjpeg_turbo_decode=true \
skia_use_libjpeg_turbo_encode=false \
skia_use_libpng_encode=false \
skia_use_libwebp_decode=false \
skia_use_libwebp_encode=false \
skia_use_lua=false \
skia_use_piex=false \
skia_use_system_libjpeg_turbo=false \
skia_use_vulkan=false \
skia_enable_fontmgr_custom_directory=false \
\
${GN_GPU} \
\
skia_enable_skshaper=true \
skia_enable_skgpu_v2=false \
skia_enable_pdf=false"
# Build all the libs we will need below
${NINJA} -C ${BUILD_DIR} libskia.a libskottie.a libsksg.a libskshaper.a
export EMCC_CLOSURE_ARGS="--externs $BASE_DIR/externs.js "
echo "Generating final wasm"
# Emscripten prefers that the .a files go last in order, otherwise, it
# may drop symbols that it incorrectly thinks aren't used. One day,
# Emscripten will use LLD, which may relax this requirement.
${EMCXX} \
-I. \
$RELEASE_CONF \
-DSK_DISABLE_AAA \
-DSK_FORCE_8_BYTE_ALIGNMENT \
$WASM_GPU \
-std=c++17 \
--bind \
--no-entry \
--pre-js $BASE_DIR/preamble.js \
--pre-js $BASE_DIR/helper.js \
--pre-js $BASE_DIR/interface.js \
--pre-js $BASE_DIR/postamble.js \
$BASE_DIR/skottiekit_bindings.cpp \
modules/skresources/src/SkResources.cpp \
$MANAGED_SKOTTIE_BINDINGS \
$BUILD_DIR/libskottie.a \
$BUILD_DIR/libsksg.a \
$BUILD_DIR/libskshaper.a \
$BUILD_DIR/libskia.a \
-s ALLOW_MEMORY_GROWTH=1 \
-s EXPORT_NAME="SkottieKitInit" \
-s FORCE_FILESYSTEM=0 \
-s FILESYSTEM=0 \
-s MODULARIZE=1 \
-s NO_EXIT_RUNTIME=1 \
-s STRICT=1 \
-s INITIAL_MEMORY=128MB \
-s WARN_UNALIGNED=1 \
-s WASM=1 \
-o $BUILD_DIR/skottiekit.js