commit-bot@chromium.org | c5d9bb0 | 2014-04-08 15:19:34 +0000 | [diff] [blame] | 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(SkPicture*, TileMode, TileMode); |
| 25 | virtual ~SkPictureShader(); |
| 26 | |
commit-bot@chromium.org | bc2f1dc | 2014-04-23 09:11:58 +0000 | [diff] [blame] | 27 | virtual bool validContext(const SkBitmap&, const SkPaint&, |
| 28 | const SkMatrix&, SkMatrix* totalInverse = NULL) const SK_OVERRIDE; |
| 29 | virtual SkShader::Context* createContext(const SkBitmap& device, const SkPaint& paint, |
| 30 | const SkMatrix& matrix, void* storage) const |
| 31 | SK_OVERRIDE; |
| 32 | virtual size_t contextSize() const SK_OVERRIDE; |
commit-bot@chromium.org | c5d9bb0 | 2014-04-08 15:19:34 +0000 | [diff] [blame] | 33 | |
commit-bot@chromium.org | bc2f1dc | 2014-04-23 09:11:58 +0000 | [diff] [blame] | 34 | class PictureShaderContext : public SkShader::Context { |
| 35 | public: |
| 36 | PictureShaderContext(const SkPictureShader& shader, const SkBitmap& device, |
| 37 | const SkPaint& paint, const SkMatrix& matrix, |
| 38 | SkShader* bitmapShader); |
| 39 | virtual ~PictureShaderContext(); |
| 40 | |
| 41 | virtual uint32_t getFlags() const SK_OVERRIDE; |
| 42 | |
| 43 | virtual ShadeProc asAShadeProc(void** ctx) SK_OVERRIDE; |
| 44 | virtual void shadeSpan(int x, int y, SkPMColor dstC[], int count) SK_OVERRIDE; |
| 45 | virtual void shadeSpan16(int x, int y, uint16_t dstC[], int count) SK_OVERRIDE; |
| 46 | |
| 47 | private: |
| 48 | SkAutoTUnref<SkShader> fBitmapShader; |
| 49 | SkShader::Context* fBitmapShaderContext; |
| 50 | void* fBitmapShaderContextStorage; |
| 51 | |
| 52 | typedef SkShader::Context INHERITED; |
| 53 | }; |
commit-bot@chromium.org | c5d9bb0 | 2014-04-08 15:19:34 +0000 | [diff] [blame] | 54 | |
| 55 | SK_TO_STRING_OVERRIDE() |
| 56 | SK_DECLARE_PUBLIC_FLATTENABLE_DESERIALIZATION_PROCS(SkPictureShader) |
| 57 | |
| 58 | #if SK_SUPPORT_GPU |
| 59 | GrEffectRef* asNewEffect(GrContext*, const SkPaint&) const SK_OVERRIDE; |
| 60 | #endif |
| 61 | |
| 62 | protected: |
| 63 | SkPictureShader(SkReadBuffer&); |
| 64 | virtual void flatten(SkWriteBuffer&) const SK_OVERRIDE; |
| 65 | |
| 66 | private: |
| 67 | SkPictureShader(SkPicture*, TileMode, TileMode); |
| 68 | |
commit-bot@chromium.org | bc2f1dc | 2014-04-23 09:11:58 +0000 | [diff] [blame] | 69 | SkShader* validInternal(const SkBitmap& device, const SkPaint& paint, |
| 70 | const SkMatrix& matrix, SkMatrix* totalInverse) const; |
| 71 | |
| 72 | SkShader* refBitmapShader(const SkMatrix&) const; |
commit-bot@chromium.org | c5d9bb0 | 2014-04-08 15:19:34 +0000 | [diff] [blame] | 73 | |
| 74 | SkPicture* fPicture; |
| 75 | TileMode fTmx, fTmy; |
| 76 | |
commit-bot@chromium.org | bc2f1dc | 2014-04-23 09:11:58 +0000 | [diff] [blame] | 77 | mutable SkMutex fCachedBitmapShaderMutex; |
| 78 | mutable SkAutoTUnref<SkShader> fCachedBitmapShader; |
commit-bot@chromium.org | c5d9bb0 | 2014-04-08 15:19:34 +0000 | [diff] [blame] | 79 | mutable SkSize fCachedTileScale; |
commit-bot@chromium.org | bc2f1dc | 2014-04-23 09:11:58 +0000 | [diff] [blame] | 80 | mutable SkMatrix fCachedLocalMatrix; |
commit-bot@chromium.org | c5d9bb0 | 2014-04-08 15:19:34 +0000 | [diff] [blame] | 81 | |
| 82 | typedef SkShader INHERITED; |
| 83 | }; |
| 84 | |
| 85 | #endif // SkPictureShader_DEFINED |