Draft change to start pulling uniform color into GP

src/gpu/GrOptDrawState.h

 /*
  * Copyright 2014 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #ifndef GrOptDrawState_DEFINED
 #define GrOptDrawState_DEFINED
 
@@ skipping 17 matching lines @@
 class GrOptDrawState {
 public:
     SK_DECLARE_INST_COUNT(GrOptDrawState)
 
     typedef GrClipMaskManager::ScissorState ScissorState;
 
     GrOptDrawState(const GrDrawState& drawState, const GrGeometryProcessor*, const GrPathProcessor*,
                    const GrDrawTargetCaps&, const ScissorState&,
                    const GrDeviceCoordTexture* dstCopy, GrGpu::DrawType);
 
+    /*
+     * the Equality operator may update GrOptDrawState's GrBatchTracker object to subsume that's
+     * GrBatchTracker into this's GrBatchTracker.
+     */
     bool operator== (const GrOptDrawState& that) const;
     bool operator!= (const GrOptDrawState& that) const { return !(*this == that); }
 
     /// @}
 
     ///////////////////////////////////////////////////////////////////////////
     /// @name Color
     ////
 
     GrColor getColor() const { return fColor; }
 
     /// @}
 
     ///////////////////////////////////////////////////////////////////////////
-    /// @name Coverage
-    ////
-
-    uint8_t getCoverage() const { return fCoverage; }
-
-    GrColor getCoverageColor() const {
-        return GrColorPackRGBA(fCoverage, fCoverage, fCoverage, fCoverage);
-    }
-
-    /// @}
-
-    ///////////////////////////////////////////////////////////////////////////
     /// @name Effect Stages
     /// Each stage hosts a GrProcessor. The effect produces an output color or coverage in the
     /// fragment shader. Its inputs are the output from the previous stage as well as some variables
     /// available to it in the fragment and vertex shader (e.g. the vertex position, the dst color,
     /// the fragment position, local coordinates).
     ///
     /// The stages are divided into two sets, color-computing and coverage-computing. The final
     /// color stage produces the final pixel color. The coverage-computing stages function exactly
     /// as the color-computing but the output of the final coverage stage is treated as a fractional
     /// pixel coverage rather than as input to the src/dst color blend step.
     ///
     /// The input color to the first color-stage is either the constant color or interpolated
     /// per-vertex colors. The input to the first coverage stage is either a constant coverage
     /// (usually full-coverage) or interpolated per-vertex coverage.
     ////
 
     int numColorStages() const { return fNumColorStages; }
     int numCoverageStages() const { return fFragmentStages.count() - fNumColorStages; }
     int numFragmentStages() const { return fFragmentStages.count(); }
     int numTotalStages() const {
         // the + 1 at the end is for the xferProcessor which will always be present
         return this->numFragmentStages() + (this->hasGeometryProcessor() ? 1 : 0) + 1;
     }
 
+    // TODO remove the GP specific calls when the PathProc can provide the same interface
     bool hasGeometryProcessor() const { return SkToBool(fGeometryProcessor.get()); }
     const GrGeometryProcessor* getGeometryProcessor() const { return fGeometryProcessor.get(); }
+    const GrPrimitiveProcessor* getPrimitiveProcessor() const { return fPrimitiveProcessor.get(); }
     const GrBatchTracker& getBatchTracker() const { return fBatchTracker; }
 
     const GrXferProcessor* getXferProcessor() const { return fXferProcessor.get(); }
 
     const GrPendingFragmentStage& getColorStage(int idx) const {
         SkASSERT(idx < this->numColorStages());
         return fFragmentStages[idx];
     }
     const GrPendingFragmentStage& getCoverageStage(int idx) const {
         SkASSERT(idx < this->numCoverageStages());
@@ skipping 106 matching lines @@
     typedef GrPendingIOResource<GrRenderTarget, kWrite_GrIOType> RenderTarget;
     typedef SkSTArray<8, GrPendingFragmentStage> FragmentStageArray;
     typedef GrPendingProgramElement<const GrGeometryProcessor> ProgramGeometryProcessor;
     typedef GrPendingProgramElement<const GrPrimitiveProcessor> ProgramPrimitiveProcessor;
     typedef GrPendingProgramElement<const GrXferProcessor> ProgramXferProcessor;
     RenderTarget                        fRenderTarget;
     ScissorState                        fScissorState;
     GrColor                             fColor;
     SkMatrix                            fViewMatrix;
     GrStencilSettings                   fStencilSettings;
-    uint8_t                             fCoverage;
     GrDrawState::DrawFace               fDrawFace;
     GrDeviceCoordTexture                fDstCopy;
     uint32_t                            fFlags;
     ProgramGeometryProcessor            fGeometryProcessor;
     ProgramPrimitiveProcessor           fPrimitiveProcessor;
-    GrBatchTracker                      fBatchTracker;
+    mutable GrBatchTracker              fBatchTracker;
     ProgramXferProcessor                fXferProcessor;
     FragmentStageArray                  fFragmentStages;
     GrGpu::DrawType                     fDrawType;
     GrProgramDesc::DescInfo             fDescInfo;
     bool                                fFinalized;
 
     // This function is equivalent to the offset into fFragmentStages where coverage stages begin.
     int                                 fNumColorStages;
 
     GrProgramDesc fDesc;
 
     typedef SkRefCnt INHERITED;
 };
 
 #endif