skia2/tests/sksl/shared/EmptyBlocks.glsl
John Stiles 4d6310ab20 Support half4 return values from main() in the SPIR-V code generator.
This creates a helper function, _entrypoint, which invokes main() and
assigns its result into sk_FragColor. We also make sure to prevent
sk_FragColor from being dead-stripped from the code during IR
generation.

At present this is useful for allowing our SkSL test shaders to compile.

Change-Id: I2d7fab0e1959a77778ffdb18ca569e869bcaeece
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/358525
Commit-Queue: John Stiles <johnstiles@google.com>
Reviewed-by: Brian Osman <brianosman@google.com>
2021-01-27 02:46:03 +00:00

15 lines
418 B
GLSL

out vec4 sk_FragColor;
vec4 main() {
vec4 color = vec4(0.0, 0.0, 0.0, 0.0);
for (int counter = 0;counter < 10; ++counter) ;
for (int counter = 0;counter < 10; ++counter) {
}
for (int counter = 0;counter < 10; ++counter) ;
if (sqrt(1.0) == 1.0) color.y = 1.0;
if (sqrt(1.0) == 2.0) ; else color.w = 1.0;
while (sqrt(1.0) == 2.0) ;
do ; while (sqrt(1.0) == 2.0);
return color;
}