Extract most of the mutable state of SkShader into a separate Context object.

src/core/SkBitmapProcState.h

 
 /*
  * Copyright 2007 The Android Open Source Project
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 
 #ifndef SkBitmapProcState_DEFINED
@@ skipping 22 matching lines @@
 #endif
 
 class SkPaint;
 struct SkConvolutionProcs;
 
 struct SkBitmapProcState {
 
     SkBitmapProcState(): fScaledCacheID(NULL), fBitmapFilter(NULL) {}
     ~SkBitmapProcState();
 
+    SkBitmapProcState(const SkBitmapProcState& src);
+
     typedef void (*ShaderProc32)(const SkBitmapProcState&, int x, int y,
                                  SkPMColor[], int count);
 
     typedef void (*ShaderProc16)(const SkBitmapProcState&, int x, int y,
                                  uint16_t[], int count);
 
     typedef void (*MatrixProc)(const SkBitmapProcState&,
                                uint32_t bitmapXY[],
                                int count,
                                int x, int y);
@@ skipping 176 matching lines @@
 void S32_D16_filter_DX(const SkBitmapProcState& s,
                        const uint32_t* xy, int count, uint16_t* colors);
 
 void highQualityFilter32(const SkBitmapProcState &s, int x, int y,
                          SkPMColor *SK_RESTRICT colors, int count);
 void highQualityFilter16(const SkBitmapProcState &s, int x, int y,
                          uint16_t *SK_RESTRICT colors, int count);
 
 
 #endif