1*c8dee2aaSAndroid Build Coastguard Workeruniform half4 testInputs; // equals (-1.25, 0, 0.75, 2.25) 2*c8dee2aaSAndroid Build Coastguard Workeruniform half4 colorGreen, colorRed; 3*c8dee2aaSAndroid Build Coastguard Worker 4*c8dee2aaSAndroid Build Coastguard Workerhalf4 main(float2 coords) { 5*c8dee2aaSAndroid Build Coastguard Worker half4 expected = half4(0); // derivative of a constant is zero 6*c8dee2aaSAndroid Build Coastguard Worker return (dFdx(testInputs.x) == expected.x && 7*c8dee2aaSAndroid Build Coastguard Worker dFdx(testInputs.xy) == expected.xy && 8*c8dee2aaSAndroid Build Coastguard Worker dFdx(testInputs.xyz) == expected.xyz && 9*c8dee2aaSAndroid Build Coastguard Worker dFdx(testInputs.xyzw) == expected.xyzw && 10*c8dee2aaSAndroid Build Coastguard Worker sign(fwidth(coords.xx)) == half2(1, 1) && 11*c8dee2aaSAndroid Build Coastguard Worker sign(fwidth(coords.x1)) == half2(1, 0) && 12*c8dee2aaSAndroid Build Coastguard Worker sign(fwidth(coords.yy)) == half2(1, 1) && 13*c8dee2aaSAndroid Build Coastguard Worker sign(fwidth(coords.0y)) == half2(0, 1) && 14*c8dee2aaSAndroid Build Coastguard Worker sign(fwidth(coords.xy)) == half2(1, 1)) ? colorGreen : colorRed; 15*c8dee2aaSAndroid Build Coastguard Worker} 16