Add XferProcessor factory in GrPaint and GrDrawState.

src/gpu/GrDrawState.cpp

 /*
  * Copyright 2012 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #include "GrDrawState.h"
 
 #include "GrBlend.h"
 #include "GrOptDrawState.h"
 #include "GrPaint.h"
 #include "GrProcOptInfo.h"
+#include "GrXferProcessor.h"
+#include "effects/GrDefaultXferProcessor.h"
+#include "effects/GrPorterDuffXferProcessor.h"
 
-//////////////////////////////////////////////////////////////////////////////s
+///////////////////////////////////////////////////////////////////////////////
 
 bool GrDrawState::isEqual(const GrDrawState& that) const {
     bool usingVertexColors = this->hasColorVertexAttribute();
     if (!usingVertexColors && this->fColor != that.fColor) {
         return false;
     }
 
     if (this->getRenderTarget() != that.getRenderTarget() ||
         this->fColorStages.count() != that.fColorStages.count() ||
         this->fCoverageStages.count() != that.fCoverageStages.count() ||
@@ skipping 69 matching lines @@
     fDstBlend = that.fDstBlend;
     fBlendConstant = that.fBlendConstant;
     fFlagBits = that.fFlagBits;
     fVACount = that.fVACount;
     fVAPtr = that.fVAPtr;
     fVAStride = that.fVAStride;
     fStencilSettings = that.fStencilSettings;
     fCoverage = that.fCoverage;
     fDrawFace = that.fDrawFace;
     fGeometryProcessor.reset(SkSafeRef(that.fGeometryProcessor.get()));
+    fXPFactory.reset(SkRef(that.getXPFactory()));
     fColorStages = that.fColorStages;
     fCoverageStages = that.fCoverageStages;
 
     fHints = that.fHints;
 
     fColorProcInfoValid = that.fColorProcInfoValid;
     fCoverageProcInfoValid = that.fCoverageProcInfoValid;
     if (fColorProcInfoValid) {
         fColorProcInfo = that.fColorProcInfo;
     }
     if (fCoverageProcInfoValid) {
         fCoverageProcInfo = that.fCoverageProcInfo;
     }
 
     memcpy(fFixedFunctionVertexAttribIndices,
             that.fFixedFunctionVertexAttribIndices,
             sizeof(fFixedFunctionVertexAttribIndices));
     return *this;
 }
 
 void GrDrawState::onReset(const SkMatrix* initialViewMatrix) {
     SkASSERT(0 == fBlockEffectRemovalCnt || 0 == this->numTotalStages());
     fRenderTarget.reset(NULL);
 
     fGeometryProcessor.reset(NULL);
+    fXPFactory.reset(GrDefaultXPFactory::Create());
     fColorStages.reset();
     fCoverageStages.reset();
 
 
     this->setDefaultVertexAttribs();
 
     fColor = 0xffffffff;
     if (NULL == initialViewMatrix) {
         fViewMatrix.reset();
     } else {
@@ skipping 39 matching lines @@
     fCoverageStages.reset();
 
     for (int i = 0; i < paint.numColorStages(); ++i) {
         fColorStages.push_back(paint.getColorStage(i));
     }
 
     for (int i = 0; i < paint.numCoverageStages(); ++i) {
         fCoverageStages.push_back(paint.getCoverageStage(i));
     }
 
+    fXPFactory.reset(SkRef(paint.getXPFactory()));
+
+    this->setBlendFunc(paint.getSrcBlendCoeff(), paint.getDstBlendCoeff());
     this->setRenderTarget(rt);
 
     fViewMatrix = vm;
 
     // These have no equivalent in GrPaint, set them to defaults
     fBlendConstant = 0x0;
     fDrawFace = kBoth_DrawFace;
     fStencilSettings.setDisabled();
     fFlagBits = 0;
     fHints = 0;
 
     // Enable the clip bit
     this->enableState(GrDrawState::kClip_StateBit);
 
     this->setColor(paint.getColor());
     this->setState(GrDrawState::kDither_StateBit, paint.isDither());
     this->setState(GrDrawState::kHWAntialias_StateBit, paint.isAntiAlias());
 
-    this->setBlendFunc(paint.getSrcBlendCoeff(), paint.getDstBlendCoeff());
     this->setCoverage(0xFF);
     fColorProcInfoValid = false;
     fCoverageProcInfoValid = false;
 }
 
 ////////////////////////////////////////////////////////////////////////////////
 
 bool GrDrawState::validateVertexAttribs() const {
     // check consistency of effects and attributes
     GrSLType slTypes[kMaxVertexAttribCnt];
@@ skipping 435 matching lines @@
 
     GrBlendCoeff dstCoeff = this->getDstBlendCoeff();
     if (!(kZero_GrBlendCoeff == dstCoeff ||
          (kISA_GrBlendCoeff == dstCoeff && this->srcAlphaWillBeOne()))) {
         return true;
     }
 
     return false;
 }
 
+bool GrDrawState::coverageWillBeSingleComponent() const {
+    this->calcCoverageInvariantOutput();
+    return (fColorProcInfo.isSingleComponent());
+}
+
 void GrDrawState::calcColorInvariantOutput() const {
     if (!fColorProcInfoValid) {
         GrColor color;
         GrColorComponentFlags flags;
         if (this->hasColorVertexAttribute()) {
             if (fHints & kVertexColorsAreOpaque_Hint) {
                 flags = kA_GrColorComponentFlag;
                 color = 0xFF << GrColor_SHIFT_A;
             } else {
                 flags = static_cast<GrColorComponentFlags>(0);
@@ skipping 20 matching lines @@
         } else {
             flags = kRGBA_GrColorComponentFlags;
             color = this->getCoverageColor();
         }
         fCoverageProcInfo.calcWithInitialValues(fCoverageStages.begin(), this->numCoverageStages(),
                                                 color, flags, true, fGeometryProcessor.get());
         fCoverageProcInfoValid = true;
     }
 }