sugoi@google.com | 781cc76 | 2013-01-15 15:40:19 +0000 | [diff] [blame^] | 1 | /* |
| 2 | * Copyright 2013 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 SkDisplacementMapEffect_DEFINED |
| 9 | #define SkDisplacementMapEffect_DEFINED |
| 10 | |
| 11 | #include "SkImageFilter.h" |
| 12 | #include "SkBitmap.h" |
| 13 | |
| 14 | class SK_API SkDisplacementMapEffect : public SkImageFilter { |
| 15 | public: |
| 16 | enum ChannelSelectorType { |
| 17 | kUnknown_ChannelSelectorType, |
| 18 | kR_ChannelSelectorType, |
| 19 | kG_ChannelSelectorType, |
| 20 | kB_ChannelSelectorType, |
| 21 | kA_ChannelSelectorType, |
| 22 | kKeyBits = 3 // Max value is 4, so 3 bits are required at most |
| 23 | }; |
| 24 | |
| 25 | SkDisplacementMapEffect(ChannelSelectorType xChannelSelector, ChannelSelectorType yChannelSelector, SkScalar scale, SkImageFilter* displacement, SkImageFilter* color = NULL); |
| 26 | |
| 27 | ~SkDisplacementMapEffect(); |
| 28 | |
| 29 | SK_DECLARE_PUBLIC_FLATTENABLE_DESERIALIZATION_PROCS(SkDisplacementMapEffect) |
| 30 | |
| 31 | virtual bool onFilterImage(Proxy* proxy, |
| 32 | const SkBitmap& src, |
| 33 | const SkMatrix& ctm, |
| 34 | SkBitmap* dst, |
| 35 | SkIPoint* offset) SK_OVERRIDE; |
| 36 | #if SK_SUPPORT_GPU |
| 37 | virtual bool canFilterImageGPU() const SK_OVERRIDE { return true; } |
| 38 | virtual GrTexture* filterImageGPU(Proxy* proxy, GrTexture* src, const SkRect& rect) SK_OVERRIDE; |
| 39 | #endif |
| 40 | |
| 41 | protected: |
| 42 | explicit SkDisplacementMapEffect(SkFlattenableReadBuffer& buffer); |
| 43 | virtual void flatten(SkFlattenableWriteBuffer&) const SK_OVERRIDE; |
| 44 | |
| 45 | private: |
| 46 | ChannelSelectorType fXChannelSelector; |
| 47 | ChannelSelectorType fYChannelSelector; |
| 48 | SkScalar fScale; |
| 49 | typedef SkImageFilter INHERITED; |
| 50 | SkImageFilter* getDisplacementInput() { return getInput(0); } |
| 51 | SkImageFilter* getColorInput() { return getInput(1); } |
| 52 | }; |
| 53 | |
| 54 | #endif |