| /* |
| * 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 |
| |
| #include "SkShader.h" |
| |
| class SkBitmap; |
| class SkPicture; |
| |
| /* |
| * An SkPictureShader can be used to draw SkPicture-based patterns. |
| * |
| * The SkPicture is first rendered into a tile, which is then used to shade the area according |
| * to specified tiling rules. |
| */ |
| class SkPictureShader : public SkShader { |
| public: |
| static SkPictureShader* Create(SkPicture*, TileMode, TileMode, const SkMatrix* = NULL); |
| virtual ~SkPictureShader(); |
| |
| virtual bool validContext(const ContextRec&, SkMatrix* totalInverse) const SK_OVERRIDE; |
| virtual SkShader::Context* createContext(const ContextRec&, void* storage) const SK_OVERRIDE; |
| virtual size_t contextSize() const SK_OVERRIDE; |
| |
| class PictureShaderContext : public SkShader::Context { |
| public: |
| PictureShaderContext(const SkPictureShader&, const ContextRec&, SkShader* bitmapShader); |
| virtual ~PictureShaderContext(); |
| |
| virtual uint32_t getFlags() const SK_OVERRIDE; |
| |
| virtual ShadeProc asAShadeProc(void** ctx) SK_OVERRIDE; |
| virtual void shadeSpan(int x, int y, SkPMColor dstC[], int count) SK_OVERRIDE; |
| virtual void shadeSpan16(int x, int y, uint16_t dstC[], int count) SK_OVERRIDE; |
| |
| private: |
| SkAutoTUnref<SkShader> fBitmapShader; |
| SkShader::Context* fBitmapShaderContext; |
| void* fBitmapShaderContextStorage; |
| |
| typedef SkShader::Context INHERITED; |
| }; |
| |
| SK_TO_STRING_OVERRIDE() |
| SK_DECLARE_PUBLIC_FLATTENABLE_DESERIALIZATION_PROCS(SkPictureShader) |
| |
| #if SK_SUPPORT_GPU |
| GrEffectRef* asNewEffect(GrContext*, const SkPaint&) const SK_OVERRIDE; |
| #endif |
| |
| protected: |
| SkPictureShader(SkReadBuffer&); |
| virtual void flatten(SkWriteBuffer&) const SK_OVERRIDE; |
| |
| private: |
| SkPictureShader(SkPicture*, TileMode, TileMode, const SkMatrix* = NULL); |
| |
| SkShader* validInternal(const ContextRec&, SkMatrix* totalInverse) const; |
| SkShader* refBitmapShader(const SkMatrix&) const; |
| |
| SkPicture* fPicture; |
| TileMode fTmx, fTmy; |
| |
| mutable SkMutex fCachedBitmapShaderMutex; |
| mutable SkAutoTUnref<SkShader> fCachedBitmapShader; |
| mutable SkSize fCachedTileScale; |
| mutable SkMatrix fCachedLocalMatrix; |
| |
| typedef SkShader INHERITED; |
| }; |
| |
| #endif // SkPictureShader_DEFINED |