Create fragment processor for performing input color blend with child processor

src/gpu/effects/GrPorterDuffXferProcessor.cpp

 /*
  * Copyright 2014 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #include "effects/GrPorterDuffXferProcessor.h"
 
 #include "GrBlend.h"
 #include "GrCaps.h"
 #include "GrProcessor.h"
 #include "GrProcOptInfo.h"
 #include "GrTypes.h"
 #include "GrXferProcessor.h"
-#include "gl/GrGLBlend.h"
+#include "gl/GrGLSLBlend.h"
 #include "gl/GrGLXferProcessor.h"
 #include "gl/builders/GrGLFragmentShaderBuilder.h"
 #include "gl/builders/GrGLProgramBuilder.h"
 
 /**
  * Wraps the shader outputs and HW blend state that comprise a Porter Duff blend mode with coverage.
  */
 struct BlendFormula {
 public:
     /**
@@ skipping 468 matching lines @@
         const ShaderPDXferProcessor& xp = processor.cast<ShaderPDXferProcessor>();
         b->add32(xp.getXfermode());
     }
 
 private:
     void emitBlendCodeForDstRead(GrGLXPBuilder* pb, const char* srcColor, const char* dstColor,
                                  const char* outColor, const GrXferProcessor& proc) override {
         const ShaderPDXferProcessor& xp = proc.cast<ShaderPDXferProcessor>();
         GrGLXPFragmentBuilder* fsBuilder = pb->getFragmentShaderBuilder();
 
-        GrGLBlend::AppendPorterDuffBlend(fsBuilder, srcColor, dstColor, outColor, xp.getXfermode());
+        GrGLSLBlend::AppendMode(fsBuilder, srcColor, dstColor, outColor, xp.getXfermode());
     }
 
     void onSetData(const GrGLProgramDataManager&, const GrXferProcessor&) override {}
 
     typedef GrGLXferProcessor INHERITED;
 };
 
 ///////////////////////////////////////////////////////////////////////////////
 
 void ShaderPDXferProcessor::onGetGLProcessorKey(const GrGLSLCaps&,
@@ skipping 84 matching lines @@
 GrXferProcessor* PDLCDXferProcessor::Create(SkXfermode::Mode xfermode,
                                             const GrProcOptInfo& colorPOI) {
     if (SkXfermode::kSrcOver_Mode != xfermode) {
         return nullptr;
     }
 
     if (kRGBA_GrColorComponentFlags != colorPOI.validFlags()) {
         return nullptr;
     }
 
-    GrColor blendConstant = GrUnPreMulColor(colorPOI.color());
+    GrColor blendConstant = GrUnpremulColor(colorPOI.color());
     uint8_t alpha = GrColorUnpackA(blendConstant);
     blendConstant |= (0xff << GrColor_SHIFT_A);
 
     return new PDLCDXferProcessor(blendConstant, alpha);
 }
 
 PDLCDXferProcessor::~PDLCDXferProcessor() {
 }
 
 void PDLCDXferProcessor::onGetGLProcessorKey(const GrGLSLCaps& caps,
@@ skipping 143 matching lines @@
                                                  int* outPrimary,
                                                  int* outSecondary) {
     if (!!strcmp(xp->name(), "Porter Duff")) {
         *outPrimary = *outSecondary = -1;
         return;
     }
     BlendFormula blendFormula = static_cast<const PorterDuffXferProcessor*>(xp)->getBlendFormula();
     *outPrimary = blendFormula.fPrimaryOutputType;
     *outSecondary = blendFormula.fSecondaryOutputType;
 }