767f444feb
There is no more 'inout half4 color'. Effects return their output color. If an effect wants the input color, it must use the (already existing) approach of sampling a nullptr input shader. The change is guarded for Chromium (so we can update their runtime color filters in skia_renderer.cc). For the GPU backend, FPs can now override usesExplicitReturn to indicate that their emitCode will generate a return statement. If that's true, then writeProcessorFunction doesn't inject the automatic return of the output color, and emitFragProc will *always* wrap that FP in a helper function, even as a top-level FP. GrSkSLFP opts in to this behavior, so that the user-supplied return becomes the actual return in the FP's emitCode. Adapting the skvm code to this wasn't too bad: It looks fragile (what happens if there are multiple returns?), but that's not really possible today, without varying control flow. Bug: skia:10613 Change-Id: I205b81fd87dd32bab30b6d6d5fc78853485da036 Reviewed-on: https://skia-review.googlesource.com/c/skia/+/310756 Commit-Queue: Brian Osman <brianosman@google.com> Reviewed-by: Kevin Lubick <kjlubick@google.com> Reviewed-by: John Stiles <johnstiles@google.com> Reviewed-by: Brian Salomon <bsalomon@google.com> Reviewed-by: Mike Klein <mtklein@google.com> |
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