Create xfer processor backend.

src/gpu/GrOptDrawState.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 "GrOptDrawState.h"
 
 #include "GrDrawState.h"
@@ skipping 26 matching lines @@
     GrXferProcessor::OptFlags optFlags;
     if (xferProcessor) {
         fXferProcessor.reset(xferProcessor.get());
 
         optFlags = xferProcessor->getOptimizations(colorPOI,
                                                    coveragePOI,
                                                    drawState.isCoverageDrawing(),
                                                    drawState.isColorWriteDisabled(),
                                                    drawState.getStencil().doesWrite(),
                                                    &fColor,
-                                                   &fCoverage);
+                                                   &fCoverage,
+                                                   caps);
     }
 
     // When path rendering the stencil settings are not always set on the draw state
     // so we must check the draw type. In cases where we will skip drawing we simply return a
     // null GrOptDrawState.
     if (!xferProcessor || ((GrXferProcessor::kSkipDraw_OptFlag & optFlags) &&
                            GrGpu::kStencilPath_DrawType != drawType)) {
         // Set the fields that don't default init and return. The lack of a render target will
         // indicate that this can be skipped.
         fFlags = 0;
         fDrawFace = GrDrawState::kInvalid_DrawFace;
-        fSrcBlend = kZero_GrBlendCoeff;
-        fDstBlend = kZero_GrBlendCoeff;
-        fBlendConstant = 0x0;
         fViewMatrix.reset();
         return;
     }
 
     fRenderTarget.reset(drawState.fRenderTarget.get());
     SkASSERT(fRenderTarget);
     fScissorState = scissorState;
     fViewMatrix = drawState.getViewMatrix();
     fStencilSettings = drawState.getStencil();
     fDrawFace = drawState.getDrawFace();
@@ skipping 29 matching lines @@
     }
 
     // TODO: Once we can handle single or four channel input into coverage stages then we can use
     // drawState's coverageProcInfo (like color above) to set this initial information.
     int firstCoverageStageIdx = 0;
     fDescInfo.fInputCoverageIsUsed = true;
 
 
     GrXferProcessor::BlendInfo blendInfo;
     fXferProcessor->getBlendInfo(&blendInfo);
-    fSrcBlend = blendInfo.fSrcBlend;
-    fDstBlend = blendInfo.fDstBlend;
-    fBlendConstant = blendInfo.fBlendConstant;
 
     this->adjustProgramFromOptimizations(drawState, optFlags, colorPOI, coveragePOI,
                                          &firstColorStageIdx, &firstCoverageStageIdx);
 
     fDescInfo.fRequiresLocalCoordAttrib = hasLocalCoords;
 
     // Copy GeometryProcesssor from DS or ODS
     SkASSERT(GrGpu::IsPathRenderingDrawType(drawType) ||
              GrGpu::kStencilPath_DrawType ||
              drawState.hasGeometryProcessor());
@@ skipping 15 matching lines @@
 
     // let the GP init the batch tracker
     if (drawState.hasGeometryProcessor()) {
         GrGeometryProcessor::InitBT init;
         init.fOutputColor = fDescInfo.fInputColorIsUsed;
         init.fOutputCoverage = fDescInfo.fInputCoverageIsUsed;
         init.fColor = this->getColor();
         init.fCoverage = this->getCoverage();
         fGeometryProcessor->initBatchTracker(&fBatchTracker, init);
     }
-
-    this->setOutputStateInfo(drawState, coverageColor, optFlags, caps);
-}
-
-void GrOptDrawState::setOutputStateInfo(const GrDrawState& ds,
-                                        GrColor coverage,
-                                        GrXferProcessor::OptFlags optFlags,
-                                        const GrDrawTargetCaps& caps) {
-    // Set this default and then possibly change our mind if there is coverage.
-    fDescInfo.fPrimaryOutputType = GrProgramDesc::kModulate_PrimaryOutputType;
-    fDescInfo.fSecondaryOutputType = GrProgramDesc::kNone_SecondaryOutputType;
-
-    // Determine whether we should use dual source blending or shader code to keep coverage
-    // separate from color.
-    bool keepCoverageSeparate = !(optFlags & GrXferProcessor::kSetCoverageDrawing_OptFlag);
-    if (keepCoverageSeparate && !ds.hasSolidCoverage(coverage)) {
-        if (caps.dualSourceBlendingSupport()) {
-            if (kZero_GrBlendCoeff == fDstBlend) {
-                // write the coverage value to second color
-                fDescInfo.fSecondaryOutputType = GrProgramDesc::kCoverage_SecondaryOutputType;
-                fDstBlend = (GrBlendCoeff)GrGpu::kIS2C_GrBlendCoeff;
-            } else if (kSA_GrBlendCoeff == fDstBlend) {
-                // SA dst coeff becomes 1-(1-SA)*coverage when dst is partially covered.
-                fDescInfo.fSecondaryOutputType = GrProgramDesc::kCoverageISA_SecondaryOutputType;
-                fDstBlend = (GrBlendCoeff)GrGpu::kIS2C_GrBlendCoeff;
-            } else if (kSC_GrBlendCoeff == fDstBlend) {
-                // SA dst coeff becomes 1-(1-SA)*coverage when dst is partially covered.
-                fDescInfo.fSecondaryOutputType = GrProgramDesc::kCoverageISC_SecondaryOutputType;
-                fDstBlend = (GrBlendCoeff)GrGpu::kIS2C_GrBlendCoeff;
-            }
-        } else if (fDescInfo.fReadsDst &&
-                   kOne_GrBlendCoeff == fSrcBlend &&
-                   kZero_GrBlendCoeff == fDstBlend) {
-            fDescInfo.fPrimaryOutputType = GrProgramDesc::kCombineWithDst_PrimaryOutputType;
-        }
-    }
 }
 
 void GrOptDrawState::adjustProgramFromOptimizations(const GrDrawState& ds,
                                                     GrXferProcessor::OptFlags flags,
                                                     const GrProcOptInfo& colorPOI,
                                                     const GrProcOptInfo& coveragePOI,
                                                     int* firstColorStageIdx,
                                                     int* firstCoverageStageIdx) {
     fDescInfo.fReadsDst = false;
     fDescInfo.fReadsFragPosition = false;
@@ skipping 35 matching lines @@
 
     if (!fDescInfo.fHasVertexColor && this->fColor != that.fColor) {
         return false;
     }
 
     if (this->getRenderTarget() != that.getRenderTarget() ||
         this->fFragmentStages.count() != that.fFragmentStages.count() ||
         this->fNumColorStages != that.fNumColorStages ||
         this->fScissorState != that.fScissorState ||
         !this->fViewMatrix.cheapEqualTo(that.fViewMatrix) ||
-        this->fSrcBlend != that.fSrcBlend ||
-        this->fDstBlend != that.fDstBlend ||
         this->fDrawType != that.fDrawType ||
-        this->fBlendConstant != that.fBlendConstant ||
         this->fFlags != that.fFlags ||
         this->fStencilSettings != that.fStencilSettings ||
         this->fDrawFace != that.fDrawFace ||
         this->fDstCopy.texture() != that.fDstCopy.texture()) {
         return false;
     }
 
     if (!fDescInfo.fHasVertexCoverage && this->fCoverage != that.fCoverage) {
         return false;
     }
 
     if (this->hasGeometryProcessor()) {
         if (!that.hasGeometryProcessor()) {
             return false;
         } else if (!this->getGeometryProcessor()->isEqual(*that.getGeometryProcessor())) {
             return false;
         }
     } else if (that.hasGeometryProcessor()) {
         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;
 }