diff options
Diffstat (limited to 'src')
| -rw-r--r-- | src/gpu/effects/GrXfermodeFragmentProcessor.cpp | 19 |
1 files changed, 16 insertions, 3 deletions
diff --git a/src/gpu/effects/GrXfermodeFragmentProcessor.cpp b/src/gpu/effects/GrXfermodeFragmentProcessor.cpp index ad0427174f..94491c976e 100644 --- a/src/gpu/effects/GrXfermodeFragmentProcessor.cpp +++ b/src/gpu/effects/GrXfermodeFragmentProcessor.cpp @@ -146,12 +146,14 @@ private: } GrColor4f constantOutputForConstantInput(GrColor4f input) const override { + float alpha = input.fRGBA[3]; + input = input.opaque(); GrColor4f srcColor = ConstantOutputForConstantInput(this->childProcessor(0), input); GrColor4f dstColor = ConstantOutputForConstantInput(this->childProcessor(1), input); SkPM4f src = GrColor4fToSkPM4f(srcColor); SkPM4f dst = GrColor4fToSkPM4f(dstColor); SkPM4f res = SkBlendMode_Apply(fMode, src, dst); - return SkPM4fToGrColor4f(res); + return SkPM4fToGrColor4f(res).mulByScalar(alpha); } GrGLSLFragmentProcessor* onCreateGLSLInstance() const override; @@ -203,12 +205,18 @@ void GLComposeTwoFragmentProcessor::emitCode(EmitArgs& args) { GrGLSLFPFragmentBuilder* fragBuilder = args.fFragBuilder; const ComposeTwoFragmentProcessor& cs = args.fFp.cast<ComposeTwoFragmentProcessor>(); + const char* inputColor = nullptr; + if (args.fInputColor) { + inputColor = "inputColor"; + fragBuilder->codeAppendf("vec4 inputColor = vec4(%s.rgb, 1.0);", args.fInputColor); + } + // declare outputColor and emit the code for each of the two children SkString srcColor("xfer_src"); - this->emitChild(0, args.fInputColor, &srcColor, args); + this->emitChild(0, inputColor, &srcColor, args); SkString dstColor("xfer_dst"); - this->emitChild(1, args.fInputColor, &dstColor, args); + this->emitChild(1, inputColor, &dstColor, args); // emit blend code SkBlendMode mode = cs.getMode(); @@ -218,6 +226,11 @@ void GLComposeTwoFragmentProcessor::emitCode(EmitArgs& args) { dstColor.c_str(), args.fOutputColor, mode); + + // re-multiply the output color by the input color's alpha + if (args.fInputColor) { + fragBuilder->codeAppendf("%s *= %s.a;", args.fOutputColor, args.fInputColor); + } } sk_sp<GrFragmentProcessor> GrXfermodeFragmentProcessor::MakeFromTwoProcessors( |