SkPictureShader: scale down if width or height is larger than maxTextureSize

src/core/SkPictureShader.h

 /*
  * Copyright 2014 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #ifndef SkPictureShader_DEFINED
 #define SkPictureShader_DEFINED
 
@@ skipping 23 matching lines @@
                              GrColor*, GrFragmentProcessor**) const override;
 
 protected:
     SkPictureShader(SkReadBuffer&);
     void flatten(SkWriteBuffer&) const override;
     Context* onCreateContext(const ContextRec&, void* storage) const override;
 
 private:
     SkPictureShader(const SkPicture*, TileMode, TileMode, const SkMatrix*, const SkRect*);
 
-    SkShader* refBitmapShader(const SkMatrix&, const SkMatrix* localMatrix) const;
+    SkShader* refBitmapShader(const SkMatrix&, const SkMatrix* localMatrix, const int maxTextureSize = 0) const;
 
     const SkPicture* fPicture;
     SkRect           fTile;
     TileMode         fTmx, fTmy;
 
     class PictureShaderContext : public SkShader::Context {
     public:
         static Context* Create(void* storage, const SkPictureShader&, const ContextRec&,
                                SkShader* bitmapShader);
 
@@ skipping 12 matching lines @@
         SkShader::Context*      fBitmapShaderContext;
         void*                   fBitmapShaderContextStorage;
 
         typedef SkShader::Context INHERITED;
     };
 
     typedef SkShader INHERITED;
 };
 
 #endif // SkPictureShader_DEFINED