skia2/tests/sksl/intrinsics/SignFloat.glsl
John Stiles edac7716aa Evaluate single-argument generic intrinsics at compile time.
In particular, this optimizes abs() and sign() when all inputs are known
at compile time. This resolves a TODO on a test case in
`IllegalIndexing.rts`.

Change-Id: Ica310522a85b42dc7ae255bd25004a6629d04176
Bug: skia:10835
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/405676
Auto-Submit: John Stiles <johnstiles@google.com>
Commit-Queue: John Stiles <johnstiles@google.com>
Reviewed-by: Ethan Nicholas <ethannicholas@google.com>
2021-05-10 14:50:50 +00:00

10 lines
488 B
GLSL

out vec4 sk_FragColor;
uniform vec4 testInputs;
uniform vec4 colorGreen;
uniform vec4 colorRed;
vec4 main() {
vec4 expected = vec4(-1.0, 0.0, 1.0, 1.0);
return ((((((sign(testInputs.x) == expected.x && sign(testInputs.xy) == expected.xy) && sign(testInputs.xyz) == expected.xyz) && sign(testInputs) == expected) && -1.0 == expected.x) && vec2(-1.0, 0.0) == expected.xy) && vec3(-1.0, 0.0, 1.0) == expected.xyz) && vec4(-1.0, 0.0, 1.0, 1.0) == expected ? colorGreen : colorRed;
}