94f726ae62
Change-Id: Iacd924471971c3c551648f75c1ecf0f1bfd3ed07 Bug: skia:12642 Reviewed-on: https://skia-review.googlesource.com/c/skia/+/479061 Commit-Queue: Julia Lavrova <jlavrova@google.com> Reviewed-by: John Stiles <johnstiles@google.com>
43 lines
1.6 KiB
Plaintext
43 lines
1.6 KiB
Plaintext
uniform half4 colorGreen, colorRed;
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bool test_same_vectors(bool eq, float f1, float f2, float f3, float f4) {
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float one = colorGreen.r + 1;
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vec4 a = float4(f1, f2, f3, f4);
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vec4 b = float4(f1 * one, f2 * one, f3 * one, f4 * one);
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return eq ? a == b : a != b;
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}
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bool test_diff_vectors(bool eq, float f1, float f2, float f3, float f4) {
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float two = colorGreen.r + 2;
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vec4 a = float4(f1, f2, f3, f4);
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vec4 b = float4(f1 * two, f2 * two, f3 * two, f4 * two);
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return eq ? a == b : a != b;
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}
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vec4 main(vec2 coords) {
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float NAN1 = colorGreen.r/colorGreen.b;
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float NAN2 = colorGreen.b/colorGreen.r;
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float ZP = +colorGreen.r*colorGreen.b;
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float ZM = -colorGreen.r*colorGreen.b;
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float F42 = colorGreen.g * 42.0;
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float F43 = colorGreen.g * 43.0;
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float F44 = colorGreen.g * 44.0;
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float F45 = colorGreen.g * 45.0;
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bool EQ = true; // Tests for ==
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bool NE = false; // Tests for !=
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return true
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&& test_same_vectors(EQ, F42, ZM, ZP, F43) // equal, including -0 and +0 values
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&& !test_same_vectors(NE, F42, ZM, ZP, F43) // not (not equal)
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&& test_same_vectors(NE, F42, NAN1, NAN2, F43) // NA values always not equal
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&& !test_same_vectors(EQ, F42, NAN1, NAN2, F43)
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&& test_diff_vectors(NE, F42, F43, F44, F45) // one of the normal values not equal
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&& !test_diff_vectors(EQ, F42, F43, F44, F45)
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&& test_diff_vectors(NE, NAN1, ZM, ZP, F42) // one of the normal values not equal
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&& !test_diff_vectors(EQ, NAN1, ZM, ZP, F42)
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? colorGreen : colorRed;
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}
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