Incrementally flush GrDrawTarget

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 212 matching lines @@
                                            GrStencilSettings*);
     bool setupClip(const GrPipelineBuilder&,
                            GrPipelineBuilder::AutoRestoreFragmentProcessorState*,
                            GrPipelineBuilder::AutoRestoreStencil*,
                            GrScissorState*,
                            const SkRect* devBounds);
 
     // Used only by CMM.
     void clearStencilClip(const SkIRect&, bool insideClip, GrRenderTarget*);
 
+    // flushes N batches, starting from index
+    inline void flushN(int index, int n);
+
     SkSTArray<256, SkAutoTUnref<GrBatch>, true> fBatches;
     SkAutoTDelete<GrClipMaskManager>            fClipMaskManager;
     // The context is only in service of the clip mask manager, remove once CMM doesn't need this.
     GrContext*                                  fContext;
     GrGpu*                                      fGpu;
     GrResourceProvider*                         fResourceProvider;
     bool                                        fFlushing;
     GrBatchToken                                fLastFlushToken;
+    int                                         fLastFlushedBatch;
 
     typedef SkRefCnt INHERITED;
 };
 
 #endif