skia2/tests/sksl/workarounds/BlendModesAllZeroVec.glsl


out vec4 sk_FragColor;
in vec4 src;
in vec4 dst;
void main() {
    sk_FragColor = src == vec4(0.0) ? vec4(0.0) : src * dst.w;
    sk_FragColor = dst == vec4(0.0) ? vec4(0.0) : dst * src.w;
}
Add test for sk_Caps.inBlendModesFailRandomlyForAllZeroVec. This CL also alphabetizes the various factories in ShaderCapsFactory. Change-Id: I0378ceb821678173e72690d5563d2a9a92d90201 Bug: skia:10694, skia:10819 Reviewed-on: https://skia-review.googlesource.com/c/skia/+/324257 Commit-Queue: Brian Osman <brianosman@google.com> Reviewed-by: Brian Osman <brianosman@google.com> Auto-Submit: John Stiles <johnstiles@google.com> 2020-10-08 22:39:08 +00:00
			`out vec4 sk_FragColor;`
			`in vec4 src;`
			`in vec4 dst;`
			`void main() {`
Eliminate inliner temporary variables for top-level-exit functions. When we determine that a function only contains a single return statement and it is at the top level (i.e. not inside any scopes), there is no need to create a temporary variable and store the result expression into a variable. Instead, we can directly replace the function-call expression with the return-statement's expression. Unlike my previous solution, this does not require variable declarations to be rewritten. The no-scopes limitation makes it slightly less effective in theory, but in practice we still get almost all of the benefit. The no-scope limitation bites us on structures like @if (true) { return x; } else { return y; } Which will optimize away the if, but leave the scope: { return x; } However, this is not a big deal; the biggest wins are single-line helper functions like `guarded_divide` and `unpremul` which retain the full benefit. Change-Id: I7fbb725e65db021b9795c04c816819669815578f Reviewed-on: https://skia-review.googlesource.com/c/skia/+/345167 Commit-Queue: John Stiles <johnstiles@google.com> Auto-Submit: John Stiles <johnstiles@google.com> Reviewed-by: Ethan Nicholas <ethannicholas@google.com> 2020-12-17 19:38:56 +00:00			`sk_FragColor = src == vec4(0.0) ? vec4(0.0) : src * dst.w;`
			`sk_FragColor = dst == vec4(0.0) ? vec4(0.0) : dst * src.w;`
Add test for sk_Caps.inBlendModesFailRandomlyForAllZeroVec. This CL also alphabetizes the various factories in ShaderCapsFactory. Change-Id: I0378ceb821678173e72690d5563d2a9a92d90201 Bug: skia:10694, skia:10819 Reviewed-on: https://skia-review.googlesource.com/c/skia/+/324257 Commit-Queue: Brian Osman <brianosman@google.com> Reviewed-by: Brian Osman <brianosman@google.com> Auto-Submit: John Stiles <johnstiles@google.com> 2020-10-08 22:39:08 +00:00			`}`