unplugged-system/external/skia/tests/sksl/intrinsics/SampleGrad.glsl

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uniform vec2 u_skRTFlip;
out vec4 sk_FragColor;
layout (binding = 0) uniform sampler2D t;
vec4 main() {
return textureGrad(t, coords, dFdx(coords), (u_skRTFlip.y * dFdy(coords)));
}