Revert of Move DstCopy on gpu into the GrXferProcessor.

src/gpu/GrPipeline.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 "GrPipeline.h"
 
 #include "GrBatch.h"
@@ skipping 30 matching lines @@
 }
 
 void GrPipeline::internalConstructor(const GrPipelineBuilder& pipelineBuilder,
                                          const GrProcOptInfo& colorPOI,
                                          const GrProcOptInfo& coveragePOI,
                                          const GrDrawTargetCaps& caps,
                                          const GrScissorState& scissorState,
                                          const GrDeviceCoordTexture* dstCopy) {
     // Create XferProcessor from DS's XPFactory
     SkAutoTUnref<GrXferProcessor> xferProcessor(
-        pipelineBuilder.getXPFactory()->createXferProcessor(colorPOI, coveragePOI, dstCopy, caps));
+        pipelineBuilder.getXPFactory()->createXferProcessor(colorPOI, coveragePOI));
 
     GrColor overrideColor = GrColor_ILLEGAL;
     if (colorPOI.firstEffectiveStageIndex() != 0) {
         overrideColor = colorPOI.inputColorToEffectiveStage();
     }
 
     GrXferProcessor::OptFlags optFlags;
     if (xferProcessor) {
         fXferProcessor.reset(xferProcessor.get());
 
@@ skipping 13 matching lines @@
         fFlags = 0;
         fDrawFace = GrPipelineBuilder::kInvalid_DrawFace;
         return;
     }
 
     fRenderTarget.reset(pipelineBuilder.fRenderTarget.get());
     SkASSERT(fRenderTarget);
     fScissorState = scissorState;
     fStencilSettings = pipelineBuilder.getStencil();
     fDrawFace = pipelineBuilder.getDrawFace();
+    // TODO move this out of GrPipeline
+    if (dstCopy) {
+        fDstCopy = *dstCopy;
+    }
 
     fFlags = 0;
     if (pipelineBuilder.isHWAntialias()) {
         fFlags |= kHWAA_Flag;
     }
     if (pipelineBuilder.isDither()) {
         fFlags |= kDither_Flag;
     }
 
     int firstColorStageIdx = colorPOI.firstEffectiveStageIndex();
 
     // TODO: Once we can handle single or four channel input into coverage stages then we can use
     // GrPipelineBuilder's coverageProcInfo (like color above) to set this initial information.
     int firstCoverageStageIdx = 0;
 
     GrXferProcessor::BlendInfo blendInfo;
     fXferProcessor->getBlendInfo(&blendInfo);
 
     this->adjustProgramFromOptimizations(pipelineBuilder, optFlags, colorPOI, coveragePOI,
                                          &firstColorStageIdx, &firstCoverageStageIdx);
 
+    fDescInfo.fReadsDst = fXferProcessor->willReadDstColor();
+
     bool usesLocalCoords = false;
 
     // Copy Stages from PipelineBuilder to Pipeline
     for (int i = firstColorStageIdx; i < pipelineBuilder.numColorStages(); ++i) {
         SkNEW_APPEND_TO_TARRAY(&fFragmentStages,
                                GrPendingFragmentStage,
                                (pipelineBuilder.fColorStages[i]));
         usesLocalCoords = usesLocalCoords ||
                           pipelineBuilder.fColorStages[i].processor()->usesLocalCoords();
     }
@@ skipping 13 matching lines @@
     fInitBT.fCoverageIgnored = SkToBool(optFlags & GrXferProcessor::kIgnoreCoverage_OptFlag);
     fInitBT.fUsesLocalCoords = usesLocalCoords;
 }
 
 void GrPipeline::adjustProgramFromOptimizations(const GrPipelineBuilder& pipelineBuilder,
                                                 GrXferProcessor::OptFlags flags,
                                                 const GrProcOptInfo& colorPOI,
                                                 const GrProcOptInfo& coveragePOI,
                                                 int* firstColorStageIdx,
                                                 int* firstCoverageStageIdx) {
-    fReadsFragPosition = false;
+    fDescInfo.fReadsFragPosition = false;
 
     if ((flags & GrXferProcessor::kIgnoreColor_OptFlag) ||
         (flags & GrXferProcessor::kOverrideColor_OptFlag)) {
         *firstColorStageIdx = pipelineBuilder.numColorStages();
     } else {
-        fReadsFragPosition = colorPOI.readsFragPosition();
+        fDescInfo.fReadsFragPosition = colorPOI.readsFragPosition();
     }
 
     if (flags & GrXferProcessor::kIgnoreCoverage_OptFlag) {
         *firstCoverageStageIdx = pipelineBuilder.numCoverageStages();
     } else {
         if (coveragePOI.readsFragPosition()) {
-            fReadsFragPosition = true;
+            fDescInfo.fReadsFragPosition = true;
         }
     }
 }
 
 ////////////////////////////////////////////////////////////////////////////////
 
 bool GrPipeline::isEqual(const GrPipeline& that) const {
     if (this->getRenderTarget() != that.getRenderTarget() ||
         this->fFragmentStages.count() != that.fFragmentStages.count() ||
         this->fNumColorStages != that.fNumColorStages ||
         this->fScissorState != that.fScissorState ||
         this->fFlags != that.fFlags ||
         this->fStencilSettings != that.fStencilSettings ||
-        this->fDrawFace != that.fDrawFace) {
+        this->fDrawFace != that.fDrawFace ||
+        this->fDstCopy.texture() != that.fDstCopy.texture()) {
         return false;
     }
 
     if (!this->getXferProcessor()->isEqual(*that.getXferProcessor())) {
         return false;
     }
 
     // The program desc comparison should have already assured that the stage counts match.
     SkASSERT(this->numFragmentStages() == that.numFragmentStages());
     for (int i = 0; i < this->numFragmentStages(); i++) {
 
         if (this->getFragmentStage(i) != that.getFragmentStage(i)) {
             return false;
         }
     }
     return true;
 }