1*c8dee2aaSAndroid Build Coastguard Worker/*#pragma settings NoRTFlip*/ 2*c8dee2aaSAndroid Build Coastguard Worker 3*c8dee2aaSAndroid Build Coastguard Workeruniform half4 testInputs; // equals (-1.25, 0, 0.75, 2.25) 4*c8dee2aaSAndroid Build Coastguard Workeruniform half4 colorGreen, colorRed; 5*c8dee2aaSAndroid Build Coastguard Worker 6*c8dee2aaSAndroid Build Coastguard Workerhalf4 main(float2 coords) { 7*c8dee2aaSAndroid Build Coastguard Worker half4 expected = half4(0); // derivative of a constant is zero 8*c8dee2aaSAndroid Build Coastguard Worker return (dFdy(testInputs.x) == expected.x && 9*c8dee2aaSAndroid Build Coastguard Worker dFdy(testInputs.xy) == expected.xy && 10*c8dee2aaSAndroid Build Coastguard Worker dFdy(testInputs.xyz) == expected.xyz && 11*c8dee2aaSAndroid Build Coastguard Worker dFdy(testInputs.xyzw) == expected.xyzw && 12*c8dee2aaSAndroid Build Coastguard Worker sign(dFdy(coords.xx)) == half2(0, 0) && 13*c8dee2aaSAndroid Build Coastguard Worker sign(dFdy(coords.yy)) == half2(1, 1) && 14*c8dee2aaSAndroid Build Coastguard Worker sign(dFdy(coords.xy)) == half2(0, 1)) ? colorGreen : colorRed; 15*c8dee2aaSAndroid Build Coastguard Worker} 16