skia2/resources/sksl/shared/SwizzleByConstantIndex.sksl
John Stiles c2c1b0c460 Migrate some SkSL swizzle tests to dm.
Change-Id: I2bd6bf9c368359a2b21861c1b6f621040d335111
Bug: skia:11009
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/367056
Auto-Submit: John Stiles <johnstiles@google.com>
Commit-Queue: Ethan Nicholas <ethannicholas@google.com>
Reviewed-by: Ethan Nicholas <ethannicholas@google.com>
2021-02-08 16:16:28 +00:00

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uniform half4 testInputs, colorGreen, colorRed;
half4 constant_swizzle() {
half4 v = testInputs;
half x = v[0];
half y = v[1];
half z = v[2];
half w = v[3];
return half4(x, y, z, w); // -1.25, 0, 0.75, 2.25
}
half4 foldable() {
half4 v = half4(0, 1, 2, 3);
half x = v[0];
half y = v[1];
half z = v[2];
half w = v[3];
return half4(x, y, z, w); // 0, 1, 2, 3
}
half4 main() {
half4 a = constant_swizzle();
half4 b = foldable();
return a == half4(-1.25, 0, 0.75, 2.25) &&
b == half4(0, 1, 2, 3) ? colorGreen : colorRed;
}