https://skia.org/docs/user/download/
fetch skia
To build Skia as a static library in a build directory named out/Static:
bin/gn gen out/Static --args='is_official_build=true'
To build Skia as a shared library (DLL) in a build directory named out/Shared:
bin/gn gen out/Shared --args='is_official_build=true is_component_build=true'