1 /* 2 * Copyright 2014 Google Inc. 3 * 4 * Use of this source code is governed by a BSD-style license that can be 5 * found in the LICENSE file. 6 */ 7 8 #ifndef SkPictureShader_DEFINED 9 #define SkPictureShader_DEFINED 10 11 #include "SkShader.h" 12 13 class SkBitmap; 14 class SkPicture; 15 16 /* 17 * An SkPictureShader can be used to draw SkPicture-based patterns. 18 * 19 * The SkPicture is first rendered into a tile, which is then used to shade the area according 20 * to specified tiling rules. 21 */ 22 class SkPictureShader : public SkShader { 23 public: 24 static SkPictureShader* Create(const SkPicture*, TileMode, TileMode, const SkMatrix*, 25 const SkRect*); 26 virtual ~SkPictureShader(); 27 28 size_t contextSize() const override; 29 30 SK_TO_STRING_OVERRIDE() 31 SK_DECLARE_PUBLIC_FLATTENABLE_DESERIALIZATION_PROCS(SkPictureShader) 32 33 bool asFragmentProcessor(GrContext*, const SkPaint&, const SkMatrix& viewM, const SkMatrix*, 34 GrColor*, GrFragmentProcessor**) const override; 35 36 protected: 37 SkPictureShader(SkReadBuffer&); 38 void flatten(SkWriteBuffer&) const override; 39 Context* onCreateContext(const ContextRec&, void* storage) const override; 40 41 private: 42 SkPictureShader(const SkPicture*, TileMode, TileMode, const SkMatrix*, const SkRect*); 43 44 SkShader* refBitmapShader(const SkMatrix&, const SkMatrix* localMatrix, const int maxTextureSize = 0) const; 45 46 const SkPicture* fPicture; 47 SkRect fTile; 48 TileMode fTmx, fTmy; 49 50 class PictureShaderContext : public SkShader::Context { 51 public: 52 static Context* Create(void* storage, const SkPictureShader&, const ContextRec&, 53 SkShader* bitmapShader); 54 55 virtual ~PictureShaderContext(); 56 57 uint32_t getFlags() const override; 58 59 ShadeProc asAShadeProc(void** ctx) override; 60 void shadeSpan(int x, int y, SkPMColor dstC[], int count) override; 61 void shadeSpan16(int x, int y, uint16_t dstC[], int count) override; 62 63 private: 64 PictureShaderContext(const SkPictureShader&, const ContextRec&, SkShader* bitmapShader); 65 66 SkAutoTUnref<SkShader> fBitmapShader; 67 SkShader::Context* fBitmapShaderContext; 68 void* fBitmapShaderContextStorage; 69 70 typedef SkShader::Context INHERITED; 71 }; 72 73 typedef SkShader INHERITED; 74 }; 75 76 #endif // SkPictureShader_DEFINED 77
