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comparison: gfx/skia/trunk/include/effects/SkBlurDrawLooper.h
gfx/skia/trunk/include/effects/SkBlurDrawLooper.h
- branch
- TOR_BUG_3246
- changeset 7
- 129ffea94266
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| -1:000000000000 | 0:6cc538916ca3 |
|---|---|
| 1 /* | |
| 2 * Copyright 2008 The Android Open Source Project | |
| 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 | |
| 9 #ifndef SkBlurDrawLooper_DEFINED | |
| 10 #define SkBlurDrawLooper_DEFINED | |
| 11 | |
| 12 #include "SkDrawLooper.h" | |
| 13 #include "SkColor.h" | |
| 14 | |
| 15 class SkMaskFilter; | |
| 16 class SkColorFilter; | |
| 17 | |
| 18 /** \class SkBlurDrawLooper | |
| 19 This class draws a shadow of the object (possibly offset), and then draws | |
| 20 the original object in its original position. | |
| 21 should there be an option to just draw the shadow/blur layer? webkit? | |
| 22 */ | |
| 23 class SK_API SkBlurDrawLooper : public SkDrawLooper { | |
| 24 public: | |
| 25 enum BlurFlags { | |
| 26 kNone_BlurFlag = 0x00, | |
| 27 /** | |
| 28 The blur layer's dx/dy/radius aren't affected by the canvas | |
| 29 transform. | |
| 30 */ | |
| 31 kIgnoreTransform_BlurFlag = 0x01, | |
| 32 kOverrideColor_BlurFlag = 0x02, | |
| 33 kHighQuality_BlurFlag = 0x04, | |
| 34 /** mask for all blur flags */ | |
| 35 kAll_BlurFlag = 0x07 | |
| 36 }; | |
| 37 | |
| 38 SkBlurDrawLooper(SkColor color, SkScalar sigma, SkScalar dx, SkScalar dy, | |
| 39 uint32_t flags = kNone_BlurFlag); | |
| 40 | |
| 41 // SK_ATTR_DEPRECATED("use sigma version") | |
| 42 SkBlurDrawLooper(SkScalar radius, SkScalar dx, SkScalar dy, SkColor color, | |
| 43 uint32_t flags = kNone_BlurFlag); | |
| 44 virtual ~SkBlurDrawLooper(); | |
| 45 | |
| 46 virtual SkDrawLooper::Context* createContext(SkCanvas*, void* storage) const SK_OVERRIDE; | |
| 47 | |
| 48 virtual size_t contextSize() const SK_OVERRIDE { return sizeof(BlurDrawLooperContext); } | |
| 49 | |
| 50 SK_TO_STRING_OVERRIDE() | |
| 51 SK_DECLARE_PUBLIC_FLATTENABLE_DESERIALIZATION_PROCS(SkBlurDrawLooper) | |
| 52 | |
| 53 protected: | |
| 54 SkBlurDrawLooper(SkReadBuffer&); | |
| 55 virtual void flatten(SkWriteBuffer&) const SK_OVERRIDE; | |
| 56 | |
| 57 private: | |
| 58 SkMaskFilter* fBlur; | |
| 59 SkColorFilter* fColorFilter; | |
| 60 SkScalar fDx, fDy; | |
| 61 SkColor fBlurColor; | |
| 62 uint32_t fBlurFlags; | |
| 63 | |
| 64 enum State { | |
| 65 kBeforeEdge, | |
| 66 kAfterEdge, | |
| 67 kDone | |
| 68 }; | |
| 69 | |
| 70 class BlurDrawLooperContext : public SkDrawLooper::Context { | |
| 71 public: | |
| 72 explicit BlurDrawLooperContext(const SkBlurDrawLooper* looper); | |
| 73 | |
| 74 virtual bool next(SkCanvas* canvas, SkPaint* paint) SK_OVERRIDE; | |
| 75 | |
| 76 private: | |
| 77 const SkBlurDrawLooper* fLooper; | |
| 78 State fState; | |
| 79 }; | |
| 80 | |
| 81 void init(SkScalar sigma, SkScalar dx, SkScalar dy, SkColor color, uint32_t flags); | |
| 82 | |
| 83 typedef SkDrawLooper INHERITED; | |
| 84 }; | |
| 85 | |
| 86 #endif |
