| uniform half4 colorGreen, colorRed; |
| |
| struct S {float f1; float f2; float f3; }; |
| |
| bool test_same_structs(bool eq, float f1, float f2, float f3) { |
| float one = colorGreen.r + 1; |
| S a; a.f1 = f1; a.f2 = f2; a.f3 = f3; |
| S b; b.f1 = f1 * one; b.f2 = f2 * one; b.f3 = f3 * one; |
| return eq ? a == b : a != b; |
| } |
| |
| bool test_diff_structs(bool eq, float f1, float f2, float f3) { |
| float two = colorGreen.r + 2; |
| S a; a.f1 = f1; a.f2 = f2; a.f3 = f3; |
| S b; b.f1 = f1 * two; b.f2 = f2 * two; b.f3 = f3; |
| return eq ? a == b : a != b; |
| } |
| |
| vec4 main(vec2 coords) { |
| |
| float NAN1 = colorGreen.r/colorGreen.b; |
| float NAN2 = colorGreen.b/colorGreen.r; |
| float ZP = +colorGreen.r*colorGreen.b; |
| float ZM = -colorGreen.r*colorGreen.b; |
| float F42 = colorGreen.g * 42.0; |
| float F43 = colorGreen.g * 43.0; |
| float F44 = colorGreen.g * 44.0; |
| |
| bool EQ = true; // Tests for == |
| bool NE = false; // Tests for != |
| |
| return true |
| && test_same_structs(EQ, F42, ZM, ZP) // equal, including -0 and +0 values |
| && !test_same_structs(NE, F42, ZM, ZP) // not (not equal) |
| && test_same_structs(NE, F42, NAN1, NAN2) // NA values always not equal |
| && !test_same_structs(EQ, F42, NAN1, NAN2) |
| && test_diff_structs(NE, F42, F43, F44) // one of the normal values not equal |
| && !test_diff_structs(EQ, F42, F43, F44) |
| && test_diff_structs(NE, NAN1, ZM, ZP) // one of the normal values not equal |
| && !test_diff_structs(EQ, NAN1, ZM, ZP) |
| |
| ? colorGreen : colorRed; |
| } |