AARectBatch can transform coords on cpu

src/gpu/GrBatch.h

 /*
  * Copyright 2015 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #ifndef GrBatch_DEFINED
 #define GrBatch_DEFINED
 
@@ skipping 76 matching lines @@
     template <typename T> T* cast() { return static_cast<T*>(this); }
 
     uint32_t classID() const { SkASSERT(kIllegalBatchClassID != fClassID); return fClassID; }
 
     // TODO no GrPrimitiveProcessors yet read fragment position
     bool willReadFragmentPosition() const { return false; }
 
     SkDEBUGCODE(bool isUsed() const { return fUsed; })
 
     const GrPipeline* pipeline() const { return fPipeline; }
-    void setPipeline(const GrPipeline* pipeline) { fPipeline.reset(SkRef(pipeline)); }
+    void setPipeline(const GrPipeline* pipeline) {
+        fPipeline.reset(SkRef(pipeline));
+        this->onSetPipeline();
+    }
 
 protected:
     template <typename PROC_SUBCLASS> void initClassID() {
          static uint32_t kClassID = GenClassID();
          fClassID = kClassID;
     }
 
     // NOTE, compute some bounds, even if extremely conservative.  Do *NOT* setLargest on the bounds
     // rect because we outset it for dst copy textures
     void setBounds(const SkRect& newBounds) { fBounds = newBounds; }
@@ skipping 49 matching lines @@
         // atomic inc returns the old value not the incremented value. So we add
         // 1 to the returned value.
         uint32_t id = static_cast<uint32_t>(sk_atomic_inc(&gCurrBatchClassID)) + 1;
         if (!id) {
             SkFAIL("This should never wrap as it should only be called once for each GrBatch "
                    "subclass.");
         }
         return id;
     }
 
+    virtual void onSetPipeline() {}
+
     enum {
         kIllegalBatchClassID = 0,
     };
     SkAutoTUnref<const GrPipeline> fPipeline;
     static int32_t gCurrBatchClassID;
     int fNumberOfDraws;
     SkDEBUGCODE(bool fUsed;)
 
     typedef SkRefCnt INHERITED;
 };
 
 #endif