// defines built-in interfaces supported by SkiaSL fragment shaders // See "enum SpvBuiltIn_" in ./spirv.h layout(builtin=15) in float4 sk_FragCoord; layout(builtin=17) in bool sk_Clockwise; // Similar to gl_FrontFacing, but defined in device space. layout(location=0,index=0,builtin=10001) out half4 sk_FragColor; layout(builtin=10008) half4 sk_LastFragColor; layout(builtin=10012) out half4 sk_SecondaryFragColor;