skia2/resources/sksl/runtime_errors/InvalidShaderMain.rts

// Runtime shaders require specific main signatures. Test that older signatures, or those intended
// for color filters don't work.

// Expect 4 errors

half4 main() { return half4(1); }
half4 main(half4 color) { return color; }
half4 main(float2 xy, half4 color, half4 bonusColor) { return color; }
half4 main(half4 outOfOrderColor, float2 outOfOrderXy) { return color; }

half4 main(float2 xy, half4 color) { return color; }  // the correct signature is allowed