Make GrDrawState and GrEffectStage use the pending io/exec ref mechanisms.

src/gpu/GrRODrawState.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 GrRODrawState_DEFINED
 #define GrRODrawState_DEFINED
 
+#include "GrEffectStage.h"
+#include "GrRenderTarget.h"
 #include "GrStencil.h"
-#include "GrEffectStage.h"
 #include "SkMatrix.h"
 
 class GrDrawTargetCaps;
 class GrPaint;
-class GrRenderTarget;
 class GrTexture;
 
 /**
  * Read-only base class for GrDrawState. This class contains all the necessary data to represent a
  * canonical DrawState. All methods in the class are const, thus once created the data in the class
  * cannot be changed.
  */
 class GrRODrawState : public SkRefCnt {
 public:
     SK_DECLARE_INST_COUNT(GrRODrawState)
@@ skipping 208 matching lines @@
 
     ///////////////////////////////////////////////////////////////////////////
     /// @name Render Target
     ////
 
     /**
      * Retrieves the currently set render-target.
      *
      * @return    The currently set render target.
      */
-    GrRenderTarget* getRenderTarget() const { return fRenderTarget.get(); }
+    GrRenderTarget* getRenderTarget() const {
+        return static_cast<GrRenderTarget*>(fRenderTarget.getResource());
+    }
 
     /// @}
 
     ///////////////////////////////////////////////////////////////////////////
     /// @name Stencil
     ////
 
     const GrStencilSettings& getStencil() const { return fStencilSettings; }
 
     /// @}
@@ skipping 81 matching lines @@
         kIncompatible_CombinedState,
         /** Either draw state can be used in place of the other. */
         kAOrB_CombinedState,
         /** Use the first draw state. */
         kA_CombinedState,
         /** Use the second draw state. */
         kB_CombinedState,
     };
 
 protected:
+    /**
+     * Converts refs on GrGpuResources owned directly or indirectly by this GrRODrawState into
+     * pending reads and writes. This should be called when a GrDrawState is recorded into
+     * a GrDrawTarget for later execution. Subclasses of GrRODrawState may add setters. However,
+     * once this call has been made the GrRODrawState is immutable. It is also no longer copyable.
+     * In the future this conversion will automatically happen when converting a GrDrawState into
+     * an optimized draw state.
+     */
+    void convertToPendingExec();
+
+    friend class GrDrawTarget;
+
+protected:
     bool isEqual(const GrRODrawState& that) const;
 
     // These fields are roughly sorted by decreasing likelihood of being different in op==
-    SkAutoTUnref<GrRenderTarget>        fRenderTarget;
+    GrProgramResource                   fRenderTarget;
     GrColor                             fColor;
     SkMatrix                            fViewMatrix;
     GrColor                             fBlendConstant;
     uint32_t                            fFlagBits;
     const GrVertexAttrib*               fVAPtr;
     int                                 fVACount;
     size_t                              fVAStride;
     GrStencilSettings                   fStencilSettings;
     uint8_t                             fCoverage;
     DrawFace                            fDrawFace;
@@ skipping 13 matching lines @@
     // not need to be compared in op==.
     int fFixedFunctionVertexAttribIndices[kGrFixedFunctionVertexAttribBindingCnt];
 
 private:
     typedef SkRefCnt INHERITED;
 };
 
 GR_MAKE_BITFIELD_OPS(GrRODrawState::BlendOptFlags);
 
 #endif