STRINGIFY(

// defines built-in interfaces supported by SkiaSL fragment shaders

layout(builtin=15) in vec4 gl_FragCoord;

// 9999 is a temporary value that causes us to ignore these declarations beyond
// adding them to the symbol table. This works fine in GLSL (where they do not
// require any further handling) but will fail in SPIR-V. We'll have a better
// solution for this soon.
layout(builtin=9999) vec4 gl_LastFragData[1];
layout(builtin=9999) vec4 gl_LastFragColor;
layout(builtin=9999) vec4 gl_LastFragColorARM;
layout(builtin=9999) int gl_SampleMaskIn[1];
layout(builtin=9999) out int gl_SampleMask[1];
layout(builtin=9999) vec4 gl_SecondaryFragColorEXT;

layout(location=0,index=0,builtin=10001) out vec4 sk_FragColor;

)