resources/sksl/runtime_errors/InvalidColorFilterFeatures.rtcf - skia - Git at Google

 // Runtime color filters may not use sk_FragCoord

 // Expect 1 error

 half4 main(half4 color) {
     return sk_FragCoord.xy01;
 }

 /*%%*
 unknown identifier 'sk_FragCoord'
 *%%*/
	// Runtime color filters may not use sk_FragCoord

	// Expect 1 error

	half4 main(half4 color) {
	return sk_FragCoord.xy01;
	}

	/%%
	unknown identifier 'sk_FragCoord'
	%%/