| /* |
| * Copyright 2008 The Android Open Source Project |
| * |
| * Use of this source code is governed by a BSD-style license that can be |
| * found in the LICENSE file. |
| */ |
| |
| |
| #ifndef SkBlurDrawLooper_DEFINED |
| #define SkBlurDrawLooper_DEFINED |
| |
| #include "SkDrawLooper.h" |
| #include "SkColor.h" |
| |
| class SkMaskFilter; |
| class SkColorFilter; |
| |
| /** \class SkBlurDrawLooper |
| This class draws a shadow of the object (possibly offset), and then draws |
| the original object in its original position. |
| should there be an option to just draw the shadow/blur layer? webkit? |
| */ |
| class SK_API SkBlurDrawLooper : public SkDrawLooper { |
| public: |
| enum BlurFlags { |
| kNone_BlurFlag = 0x00, |
| /** |
| The blur layer's dx/dy/radius aren't affected by the canvas |
| transform. |
| */ |
| kIgnoreTransform_BlurFlag = 0x01, |
| kOverrideColor_BlurFlag = 0x02, |
| kHighQuality_BlurFlag = 0x04, |
| /** mask for all blur flags */ |
| kAll_BlurFlag = 0x07 |
| }; |
| |
| SkBlurDrawLooper(SkColor color, SkScalar sigma, SkScalar dx, SkScalar dy, |
| uint32_t flags = kNone_BlurFlag); |
| |
| // SK_ATTR_DEPRECATED("use sigma version") |
| SkBlurDrawLooper(SkScalar radius, SkScalar dx, SkScalar dy, SkColor color, |
| uint32_t flags = kNone_BlurFlag); |
| virtual ~SkBlurDrawLooper(); |
| |
| virtual SkDrawLooper::Context* createContext(SkCanvas*, void* storage) const SK_OVERRIDE; |
| |
| virtual size_t contextSize() const SK_OVERRIDE { return sizeof(BlurDrawLooperContext); } |
| |
| SK_DEVELOPER_TO_STRING() |
| SK_DECLARE_PUBLIC_FLATTENABLE_DESERIALIZATION_PROCS(SkBlurDrawLooper) |
| |
| protected: |
| SkBlurDrawLooper(SkReadBuffer&); |
| virtual void flatten(SkWriteBuffer&) const SK_OVERRIDE; |
| |
| private: |
| SkMaskFilter* fBlur; |
| SkColorFilter* fColorFilter; |
| SkScalar fDx, fDy; |
| SkColor fBlurColor; |
| uint32_t fBlurFlags; |
| |
| enum State { |
| kBeforeEdge, |
| kAfterEdge, |
| kDone |
| }; |
| |
| class BlurDrawLooperContext : public SkDrawLooper::Context { |
| public: |
| explicit BlurDrawLooperContext(const SkBlurDrawLooper* looper); |
| |
| virtual bool next(SkCanvas* canvas, SkPaint* paint) SK_OVERRIDE; |
| |
| private: |
| const SkBlurDrawLooper* fLooper; |
| State fState; |
| }; |
| |
| void init(SkScalar sigma, SkScalar dx, SkScalar dy, SkColor color, uint32_t flags); |
| |
| typedef SkDrawLooper INHERITED; |
| }; |
| |
| #endif |