Implement instanced rendering for simple shapes

src/gpu/GrDrawTarget.h

 /*
  * Copyright 2010 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #ifndef GrDrawTarget_DEFINED
 #define GrDrawTarget_DEFINED
 
@@ skipping 155 matching lines @@
         GrContext* context() const { return fDrawTarget->fContext; }
         GrResourceProvider* resourceProvider() const { return fDrawTarget->fResourceProvider; }
         GrDrawTarget* fDrawTarget;
         friend class GrClipMaskManager;
     };
 
     const CMMAccess cmmAccess() { return CMMAccess(this); }
 
     GrAuditTrail* getAuditTrail() const { return fAuditTrail; }
 
+    /**
+     * Gets the shape rendering object if it is supported on this platform.
+     */
+    GrInstancedRendering* instancedRendering() const { return fInstancedRendering; }
+
 private:
     friend class GrDrawingManager; // for resetFlag & TopoSortTraits
 
     enum Flags {
         kClosed_Flag    = 0x01,   //!< This drawTarget can't accept any more batches
 
         kWasOutput_Flag = 0x02,   //!< Flag for topological sorting
         kTempMark_Flag  = 0x04,   //!< Flag for topological sorting
     };
 
@@ skipping 69 matching lines @@
     uint32_t                                    fFlags;
 
     // 'this' drawTarget relies on the output of the drawTargets in 'fDependencies'
     SkTDArray<GrDrawTarget*>                    fDependencies;
     GrRenderTarget*                             fRenderTarget;
 
     bool                                        fDrawBatchBounds;
     int                                         fMaxBatchLookback;
     int                                         fMaxBatchLookahead;
 
+    SkAutoTDelete<GrInstancedRendering>         fInstancedRendering;
+
     typedef SkRefCnt INHERITED;
 };
 
 #endif