Revert of Move DstCopy on gpu into the GrXferProcessor.

src/gpu/effects/GrCustomXfermode.cpp

 /*
  * Copyright 2015 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #include "effects/GrCustomXfermode.h"
 #include "effects/GrCustomXfermodePriv.h"
 
@@ skipping 481 matching lines @@
     }
 }
 
 ///////////////////////////////////////////////////////////////////////////////
 
 class GLCustomXP : public GrGLXferProcessor {
 public:
     GLCustomXP(const GrXferProcessor&) {}
     ~GLCustomXP() SK_OVERRIDE {}
 
+    void emitCode(const EmitArgs& args) SK_OVERRIDE {
+        SkXfermode::Mode mode = args.fXP.cast<GrCustomXP>().mode();
+        GrGLFPFragmentBuilder* fsBuilder = args.fPB->getFragmentShaderBuilder();
+        const char* dstColor = fsBuilder->dstColor();
+
+        emit_custom_xfermode_code(mode, fsBuilder, args.fOutputPrimary, args.fInputColor, dstColor);
+
+        fsBuilder->codeAppendf("%s = %s * %s + (vec4(1.0) - %s) * %s;",
+                               args.fOutputPrimary, args.fOutputPrimary, args.fInputCoverage,
+                               args.fInputCoverage, dstColor);
+    }
+
+    void setData(const GrGLProgramDataManager&, const GrXferProcessor&) SK_OVERRIDE {}
+
     static void GenKey(const GrXferProcessor& proc, const GrGLCaps&, GrProcessorKeyBuilder* b) {
         uint32_t key = proc.numTextures();
         SkASSERT(key <= 1);
         key |= proc.cast<GrCustomXP>().mode() << 1;
         b->add32(key);
     }
 
 private:
-    void onEmitCode(const EmitArgs& args) SK_OVERRIDE {
-        SkXfermode::Mode mode = args.fXP.cast<GrCustomXP>().mode();
-        GrGLFPFragmentBuilder* fsBuilder = args.fPB->getFragmentShaderBuilder();
-        const char* dstColor = fsBuilder->dstColor();
-
-        emit_custom_xfermode_code(mode, fsBuilder, args.fOutputPrimary, args.fInputColor, dstColor);
-
-        fsBuilder->codeAppendf("%s = %s * %s + (vec4(1.0) - %s) * %s;",
-                               args.fOutputPrimary, args.fOutputPrimary, args.fInputCoverage,
-                               args.fInputCoverage, dstColor);
-    }
-
-    void onSetData(const GrGLProgramDataManager&, const GrXferProcessor&) SK_OVERRIDE {}
-
     typedef GrGLFragmentProcessor INHERITED;
 };
 
 ///////////////////////////////////////////////////////////////////////////////
 
-GrCustomXP::GrCustomXP(SkXfermode::Mode mode, const GrDeviceCoordTexture* dstCopy,
-                       bool willReadDstColor)
-    : INHERITED(dstCopy, willReadDstColor), fMode(mode) {
+GrCustomXP::GrCustomXP(SkXfermode::Mode mode)
+    : fMode(mode) {
     this->initClassID<GrCustomXP>();
+    this->setWillReadDstColor();
 }
 
-void GrCustomXP::onGetGLProcessorKey(const GrGLCaps& caps, GrProcessorKeyBuilder* b) const {
+void GrCustomXP::getGLProcessorKey(const GrGLCaps& caps, GrProcessorKeyBuilder* b) const {
     GLCustomXP::GenKey(*this, caps, b);
 }
 
 GrGLXferProcessor* GrCustomXP::createGLInstance() const {
     return SkNEW_ARGS(GLCustomXP, (*this));
 }
 
 bool GrCustomXP::onIsEqual(const GrXferProcessor& other) const {
     const GrCustomXP& s = other.cast<GrCustomXP>();
     return fMode == s.fMode;
@@ skipping 24 matching lines @@
 GR_DEFINE_XP_FACTORY_TEST(GrCustomXPFactory);
 GrXPFactory* GrCustomXPFactory::TestCreate(SkRandom* rand,
                                            GrContext*,
                                            const GrDrawTargetCaps&,
                                            GrTexture*[]) {
     int mode = rand->nextRangeU(SkXfermode::kLastCoeffMode + 1, SkXfermode::kLastSeparableMode);
 
     return SkNEW_ARGS(GrCustomXPFactory, (static_cast<SkXfermode::Mode>(mode)));
 }