use SkBitmapProvider for shader-context

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
 #define SkBitmapProcState_DEFINED
 
 #include "SkBitmap.h"
 #include "SkBitmapController.h"
 #include "SkBitmapFilter.h"
 #include "SkMatrix.h"
 #include "SkMipMap.h"
 #include "SkPaint.h"
 #include "SkTemplates.h"
 
 typedef SkFixed3232    SkFractionalInt;
 #define SkScalarToFractionalInt(x)  SkScalarToFixed3232(x)
 #define SkFractionalIntToFixed(x)   SkFixed3232ToFixed(x)
 #define SkFixedToFractionalInt(x)   SkFixedToFixed3232(x)
 #define SkFractionalIntToInt(x)     SkFixed3232ToInt(x)
 
 class SkPaint;
 
 struct SkBitmapProcState {
-    SkBitmapProcState();
+    SkBitmapProcState(const SkBitmapProvider&, SkShader::TileMode tmx, SkShader::TileMode tmy);
+    SkBitmapProcState(const SkBitmap&, SkShader::TileMode tmx, SkShader::TileMode tmy);
     ~SkBitmapProcState();
 
     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[],
@@ skipping 82 matching lines @@
     friend class SkBitmapProcShader;
     friend class SkLightingShaderImpl;
 
     ShaderProc32        fShaderProc32;      // chooseProcs
     ShaderProc16        fShaderProc16;      // chooseProcs
     // These are used if the shaderproc is nullptr
     MatrixProc          fMatrixProc;        // chooseProcs
     SampleProc32        fSampleProc32;      // chooseProcs
     SampleProc16        fSampleProc16;      // chooseProcs
 
-    SkBitmap            fOrigBitmap;        // CONSTRUCTOR
+    const SkBitmapProvider fProvider;
 
     enum {
         kBMStateSize = 136  // found by inspection. if too small, we will call new/delete
     };
     SkAlignedSStorage<kBMStateSize> fBMStateStorage;
     SkBitmapController::State* fBMState;
 
     MatrixProc chooseMatrixProc(bool trivial_matrix);
     bool chooseProcs(const SkMatrix& inv, const SkPaint&);
     bool chooseScanlineProcs(bool trivialMatrix, bool clampClamp, const SkPaint& paint);
@@ skipping 49 matching lines @@
 void ClampX_ClampY_filter_affine(const SkBitmapProcState& s,
                                  uint32_t xy[], int count, int x, int y);
 void ClampX_ClampY_nofilter_affine(const SkBitmapProcState& s,
                                    uint32_t xy[], int count, int x, int y);
 void S32_D16_filter_DX(const SkBitmapProcState& s,
                        const uint32_t* xy, int count, uint16_t* colors);
 void S32_D16_filter_DXDY(const SkBitmapProcState& s,
                          const uint32_t* xy, int count, uint16_t* colors);
 
 #endif