skia2/tests/sksl/workarounds/NegatedAtan.glsl

#version 400
out vec4 sk_FragColor;
uniform float unknownInput;
void main() {
    vec2 x = vec2(unknownInput);
    sk_FragColor.x = atan(x.x, -1.0 * x.y);
}
Migrate several GLSL workaround unit tests to golden files. We now support building an SkSL golden output twice, once honoring the custom #pragma settings, and once more ignoring the settings. This allows us to see the output of the workaround technique, alongside the "default-settings" output which should not contain a workaround. To implement this, skslc now supports a flag: --[no]settings. When it's set, /#pragma settings/ comments are honored. When it's not set, skslc ignores the comments. compile_sksl_tests.py passes this flag along to skslc. This approach is not strictly limited to workarounds; the "TypePrecision" GLSL test was also updated to use this technique. Change-Id: I79204df047b024533ed6bc1f4c088e0e878d5bb1 Reviewed-on: https://skia-review.googlesource.com/c/skia/+/317246 Reviewed-by: Brian Osman <brianosman@google.com> Commit-Queue: John Stiles <johnstiles@google.com> Auto-Submit: John Stiles <johnstiles@google.com> 2020-09-16 21:46:37 +00:00			`#version 400`
			`out vec4 sk_FragColor;`
Remove usage of sqrt() as an optimization barrier in tests. In the majority of cases, a uniform is an equally good substitute, and replacing `sqrt(N)` with `unknownInput` actually makes the test clearer. Change-Id: I7bcb477571972d7aa2ce8c49b3674471f7310748 Bug: skia:12034 Reviewed-on: https://skia-review.googlesource.com/c/skia/+/411306 Auto-Submit: John Stiles <johnstiles@google.com> Commit-Queue: Ethan Nicholas <ethannicholas@google.com> Reviewed-by: Ethan Nicholas <ethannicholas@google.com> 2021-05-24 14:52:23 +00:00			`uniform float unknownInput;`
Migrate several GLSL workaround unit tests to golden files. We now support building an SkSL golden output twice, once honoring the custom #pragma settings, and once more ignoring the settings. This allows us to see the output of the workaround technique, alongside the "default-settings" output which should not contain a workaround. To implement this, skslc now supports a flag: --[no]settings. When it's set, /#pragma settings/ comments are honored. When it's not set, skslc ignores the comments. compile_sksl_tests.py passes this flag along to skslc. This approach is not strictly limited to workarounds; the "TypePrecision" GLSL test was also updated to use this technique. Change-Id: I79204df047b024533ed6bc1f4c088e0e878d5bb1 Reviewed-on: https://skia-review.googlesource.com/c/skia/+/317246 Reviewed-by: Brian Osman <brianosman@google.com> Commit-Queue: John Stiles <johnstiles@google.com> Auto-Submit: John Stiles <johnstiles@google.com> 2020-09-16 21:46:37 +00:00			`void main() {`
Remove usage of sqrt() as an optimization barrier in tests. In the majority of cases, a uniform is an equally good substitute, and replacing `sqrt(N)` with `unknownInput` actually makes the test clearer. Change-Id: I7bcb477571972d7aa2ce8c49b3674471f7310748 Bug: skia:12034 Reviewed-on: https://skia-review.googlesource.com/c/skia/+/411306 Auto-Submit: John Stiles <johnstiles@google.com> Commit-Queue: Ethan Nicholas <ethannicholas@google.com> Reviewed-by: Ethan Nicholas <ethannicholas@google.com> 2021-05-24 14:52:23 +00:00			`vec2 x = vec2(unknownInput);`
Migrate several GLSL workaround unit tests to golden files. We now support building an SkSL golden output twice, once honoring the custom #pragma settings, and once more ignoring the settings. This allows us to see the output of the workaround technique, alongside the "default-settings" output which should not contain a workaround. To implement this, skslc now supports a flag: --[no]settings. When it's set, /#pragma settings/ comments are honored. When it's not set, skslc ignores the comments. compile_sksl_tests.py passes this flag along to skslc. This approach is not strictly limited to workarounds; the "TypePrecision" GLSL test was also updated to use this technique. Change-Id: I79204df047b024533ed6bc1f4c088e0e878d5bb1 Reviewed-on: https://skia-review.googlesource.com/c/skia/+/317246 Reviewed-by: Brian Osman <brianosman@google.com> Commit-Queue: John Stiles <johnstiles@google.com> Auto-Submit: John Stiles <johnstiles@google.com> 2020-09-16 21:46:37 +00:00			`sk_FragColor.x = atan(x.x, -1.0 * x.y);`
			`}`