resources/sksl/shared/DerivativesFlipY.sksl - skia - Git at Google

 /*#pragma settings FlipY*/

 void main() {
     sk_FragColor.r = half(dFdx(1)),
     sk_FragColor.g = half(dFdy(1));
 }
	/#pragma settings FlipY/

	void main() {
	sk_FragColor.r = half(dFdx(1)),
	sk_FragColor.g = half(dFdy(1));
	}