core/pkgs/by-name/me/mesa/stubs.nix
2024-05-13 11:34:52 -04:00

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{ stdenv
, libglvnd
, mesa
, OpenGL
, testers
}:
stdenv.mkDerivation (finalAttrs: {
pname = "libGL";
inherit (if stdenv.hostPlatform.isDarwin then mesa else libglvnd) version;
outputs = [ "out" "dev" ];
# On macOS, libglvnd is not supported, so we just use what mesa
# build. We need to also include OpenGL.framework, and some
# extra tricks to go along with. We add mesas libGLX to support
# the X extensions to OpenGL.
buildCommand = if stdenv.hostPlatform.isDarwin then ''
mkdir -p $out/nix-support $dev
echo ${OpenGL} >> $out/nix-support/propagated-build-inputs
ln -s ${mesa.out}/lib $out/lib
mkdir -p $dev/lib/pkgconfig $dev/nix-support
echo "$out" > $dev/nix-support/propagated-build-inputs
ln -s ${mesa.dev}/include $dev/include
cat <<EOF >$dev/lib/pkgconfig/gl.pc
Name: gl
Description: gl library
Version: ${mesa.version}
Libs: -L${mesa.out}/lib -lGL
Cflags: -I${mesa.dev}/include
EOF
cat <<EOF >$dev/lib/pkgconfig/glesv1_cm.pc
Name: glesv1_cm
Description: glesv1_cm library
Version: ${mesa.version}
Libs: -L${mesa.out}/lib -lGLESv1_CM
Cflags: -I${mesa.dev}/include
EOF
cat <<EOF >$dev/lib/pkgconfig/glesv2.pc
Name: glesv2
Description: glesv2 library
Version: ${mesa.version}
Libs: -L${mesa.out}/lib -lGLESv2
Cflags: -I${mesa.dev}/include
EOF
''
# Otherwise, setup gl stubs to use libglvnd.
else ''
mkdir -p $out/nix-support
ln -s ${libglvnd.out}/lib $out/lib
mkdir -p $dev/{,lib/pkgconfig,nix-support}
echo "$out ${libglvnd} ${libglvnd.dev}" > $dev/nix-support/propagated-build-inputs
ln -s ${libglvnd.dev}/include $dev/include
genPkgConfig() {
local name="$1"
local lib="$2"
cat <<EOF >$dev/lib/pkgconfig/$name.pc
Name: $name
Description: $lib library
Version: ${libglvnd.version}
Libs: -L${libglvnd.out}/lib -l$lib
Cflags: -I${libglvnd.dev}/include
EOF
}
genPkgConfig gl GL
genPkgConfig egl EGL
genPkgConfig glesv1_cm GLESv1_CM
genPkgConfig glesv2 GLESv2
'';
passthru.tests.pkg-config = testers.testMetaPkgConfig finalAttrs.finalPackage;
meta = {
description = "Stub bindings using " + (if stdenv.hostPlatform.isDarwin then "mesa" else "libglvnd");
pkgConfigModules = [ "gl" "egl" "glesv1_cm" "glesv2" ];
} // {
inherit (if stdenv.hostPlatform.isDarwin then mesa.meta else libglvnd.meta) homepage license platforms;
};
})