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Side by Side Diff: src/gpu/effects/GrExtractAlphaFragmentProcessor.cpp

Issue 1321253003: emitChild() takes an outputColor instead of generating one (Closed) Base URL: https://skia.googlesource.com/skia@cs3_composeshader2
Patch Set: rebase Created 5 years, 3 months ago
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1 /* 1 /*
2 * Copyright 2015 Google Inc. 2 * Copyright 2015 Google Inc.
3 * 3 *
4 * Use of this source code is governed by a BSD-style license that can be 4 * Use of this source code is governed by a BSD-style license that can be
5 * found in the LICENSE file. 5 * found in the LICENSE file.
6 */ 6 */
7 7
8 #include "effects/GrExtractAlphaFragmentProcessor.h" 8 #include "effects/GrExtractAlphaFragmentProcessor.h"
9 #include "gl/GrGLFragmentProcessor.h" 9 #include "gl/GrGLFragmentProcessor.h"
10 #include "gl/builders/GrGLProgramBuilder.h" 10 #include "gl/builders/GrGLProgramBuilder.h"
11 11
12 class GLExtractAlphaFragmentProcessor : public GrGLFragmentProcessor { 12 class GLExtractAlphaFragmentProcessor : public GrGLFragmentProcessor {
13 public: 13 public:
14 GLExtractAlphaFragmentProcessor() {} 14 GLExtractAlphaFragmentProcessor() {}
15 15
16 void emitCode(EmitArgs& args) override { 16 void emitCode(EmitArgs& args) override {
17 GrGLFragmentBuilder* fsBuilder = args.fBuilder->getFragmentShaderBuilder (); 17 GrGLFragmentBuilder* fsBuilder = args.fBuilder->getFragmentShaderBuilder ();
18 fsBuilder->codeAppendf("vec4 alpha4 = %s.aaaa;", args.fInputColor); 18 fsBuilder->codeAppendf("vec4 alpha4 = %s.aaaa;", args.fInputColor);
19 SkString output; 19 this->emitChild(0, "alpha4", args.fOutputColor, args);
20 this->emitChild(0, "alpha4", &output, args);
21 fsBuilder->codeAppendf("%s = %s;", args.fOutputColor, output.c_str());
22 } 20 }
23 21
24 private: 22 private:
25 typedef GrGLFragmentProcessor INHERITED; 23 typedef GrGLFragmentProcessor INHERITED;
26 }; 24 };
27 25
28 GrGLFragmentProcessor* GrExtractAlphaFragmentProcessor::onCreateGLInstance() con st { 26 GrGLFragmentProcessor* GrExtractAlphaFragmentProcessor::onCreateGLInstance() con st {
29 return SkNEW(GLExtractAlphaFragmentProcessor); 27 return SkNEW(GLExtractAlphaFragmentProcessor);
30 } 28 }
31 29
32 void GrExtractAlphaFragmentProcessor::onGetGLProcessorKey(const GrGLSLCaps&, 30 void GrExtractAlphaFragmentProcessor::onGetGLProcessorKey(const GrGLSLCaps&,
33 GrProcessorKeyBuilder* ) const { 31 GrProcessorKeyBuilder* ) const {
34 } 32 }
35 33
36 bool GrExtractAlphaFragmentProcessor::onIsEqual(const GrFragmentProcessor&) cons t { return true; } 34 bool GrExtractAlphaFragmentProcessor::onIsEqual(const GrFragmentProcessor&) cons t { return true; }
37 35
38 void GrExtractAlphaFragmentProcessor::onComputeInvariantOutput(GrInvariantOutput * inout) const { 36 void GrExtractAlphaFragmentProcessor::onComputeInvariantOutput(GrInvariantOutput * inout) const {
39 if (inout->validFlags() & kA_GrColorComponentFlag) { 37 if (inout->validFlags() & kA_GrColorComponentFlag) {
40 GrColor color = GrColorPackA4(GrColorUnpackA(inout->color())); 38 GrColor color = GrColorPackA4(GrColorUnpackA(inout->color()));
41 inout->setToOther(kRGBA_GrColorComponentFlags, color, 39 inout->setToOther(kRGBA_GrColorComponentFlags, color,
42 GrInvariantOutput::kWill_ReadInput); 40 GrInvariantOutput::kWill_ReadInput);
43 } else { 41 } else {
44 inout->setToUnknown(GrInvariantOutput::kWill_ReadInput); 42 inout->setToUnknown(GrInvariantOutput::kWill_ReadInput);
45 } 43 }
46 this->childProcessor(0).computeInvariantOutput(inout); 44 this->childProcessor(0).computeInvariantOutput(inout);
47 } 45 }
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