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Skia is a complete 2D graphic library for drawing Text, Geometries, and Images.

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Skia for Aseprite and laf

Pre-built binaries of Skia in the releases page.

Skia is a 2D graphic library developed by Google Inc., you can find the official website in skia.org.

This fork is used to compile Skia automatically for laf and Aseprite using GitHub Actions.

Building Skia

In the following sections you will find straightforward steps to compile Skia. You can always check the official Skia instructions and select the OS you are building for. Aseprite and laf use the aseprite-m81 branch. So remember to checkout that specific branch.

These are the platform-specific steps to compile Skia:

After this you should have all Skia libraries compiled. After that, when you compile laf or Aseprite remember to add -DSKIA_DIR=$HOME/deps/skia parameter to your cmake call and all other parameters.

Skia on Windows

Download Google depot tools and uncompress it in some place like C:\deps\depot_tools.

It's recommended to compile Skia with Clang to get better performance. So you will need to download Clang, and install it on a folder like C:\deps\llvm (a folder without whitespaces).

Open a developer command prompt or command line (cmd.exe) and call:

call "C:\Program Files (x86)\Microsoft Visual Studio\2019\Community\Common7\Tools\VsDevCmd.bat" -arch=x64

Then:

set PATH=C:\deps\depot_tools;%PATH%
cd C:\deps\depot_tools
gclient sync

(The gclient command might print an error like Error: client not configured; see 'gclient config'. Just ignore it.)

cd C:\deps
git clone -b aseprite-m81 https://github.com/aseprite/skia.git
cd skia
set GIT_EXECUTABLE=git.bat
python tools/git-sync-deps

(The tools/git-sync-deps will take some minutes because it downloads a lot of packages, please wait and re-run the same command in case it fails.)

Finally, if you've downloaded Clang, use this command:

set PATH=C:\deps\llvm\bin;%PATH%
gn gen out/Release-x64 --args="is_debug=false is_official_build=true skia_use_system_expat=false skia_use_system_icu=false skia_use_system_libjpeg_turbo=false skia_use_system_libpng=false skia_use_system_libwebp=false skia_use_system_zlib=false skia_use_sfntly=false skia_use_freetype=true skia_use_harfbuzz=true skia_pdf_subset_harfbuzz=true skia_use_system_freetype2=false skia_use_system_harfbuzz=false target_cpu=""x64"" cc=""clang"" cxx=""clang++"" clang_win=""c:\deps\llvm"" win_vc=""C:\Program Files (x86)\Microsoft Visual Studio\2019\Community\VC"" extra_cflags=[""-MT""]"
ninja -C out/Release-x64 skia modules

If you haven't installed Clang, and want to compile Skia with MSVC (anyway it's not recommended because the performance penalty is too big), you can use the following commands instead:

gn gen out/Release-x64 --args="is_debug=false is_official_build=true skia_use_system_expat=false skia_use_system_icu=false skia_use_system_libjpeg_turbo=false skia_use_system_libpng=false skia_use_system_libwebp=false skia_use_system_zlib=false skia_use_sfntly=false skia_use_freetype=true skia_use_harfbuzz=true skia_pdf_subset_harfbuzz=true skia_use_system_freetype2=false skia_use_system_harfbuzz=false target_cpu=""x64"" win_vc=""C:\Program Files (x86)\Microsoft Visual Studio\2019\Community\VC"" extra_cflags=[""-MT""]"
ninja -C out/Release-x64 skia modules

Skia on macOS

These steps will create a deps folder in your home directory with a couple of subdirectories needed to build Skia (you can change the $HOME/deps with other directory). Some of these commands will take several minutes to finish:

mkdir $HOME/deps
cd $HOME/deps
git clone https://chromium.googlesource.com/chromium/tools/depot_tools.git
git clone -b aseprite-m81 https://github.com/aseprite/skia.git
export PATH="${PWD}/depot_tools:${PATH}"
cd skia
python tools/git-sync-deps
gn gen out/Release-x64 --args="is_debug=false is_official_build=true skia_use_system_expat=false skia_use_system_icu=false skia_use_system_libjpeg_turbo=false skia_use_system_libpng=false skia_use_system_libwebp=false skia_use_system_zlib=false skia_use_sfntly=false skia_use_freetype=true skia_use_harfbuzz=true skia_pdf_subset_harfbuzz=true skia_use_system_freetype2=false skia_use_system_harfbuzz=false target_cpu=\"x64\" extra_cflags=[\"-stdlib=libc++\", \"-mmacosx-version-min=10.9\"] extra_cflags_cc=[\"-frtti\"]"
ninja -C out/Release-x64 skia modules

Skia on Linux

These steps will create a deps folder in your home directory with a couple of subdirectories needed to build Skia (you can change the $HOME/deps with other directory). Some of these commands will take several minutes to finish:

mkdir $HOME/deps
cd $HOME/deps
git clone https://chromium.googlesource.com/chromium/tools/depot_tools.git
git clone -b aseprite-m81 https://github.com/aseprite/skia.git
export PATH="${PWD}/depot_tools:${PATH}"
cd skia
python tools/git-sync-deps
gn gen out/Release-x64 --args="is_debug=false is_official_build=true skia_use_system_expat=false skia_use_system_icu=false skia_use_system_libjpeg_turbo=false skia_use_system_libpng=false skia_use_system_libwebp=false skia_use_system_zlib=false"
ninja -C out/Release-x64 skia modules

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