1 /* 2 * Copyright 2013 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 #ifndef SkXfermodeImageFilter_DEFINED 9 #define SkXfermodeImageFilter_DEFINED 10 11 #include "SkImageFilter.h" 12 13 class SkBitmap; 14 class SkXfermode; 15 16 class SK_API SkXfermodeImageFilter : public SkImageFilter { 17 /** 18 * This filter takes an xfermode, and uses it to composite the foreground 19 * over the background. If foreground or background is NULL, the input 20 * bitmap (src) is used instead. 21 */ 22 23 public: 24 virtual ~SkXfermodeImageFilter(); 25 26 static SkXfermodeImageFilter* Create(SkXfermode* mode, SkImageFilter* background, 27 SkImageFilter* foreground = NULL, 28 const CropRect* cropRect = NULL) { 29 return SkNEW_ARGS(SkXfermodeImageFilter, (mode, background, foreground, cropRect)); 30 } 31 32 SK_DECLARE_PUBLIC_FLATTENABLE_DESERIALIZATION_PROCS(SkXfermodeImageFilter) 33 34 virtual bool onFilterImage(Proxy* proxy, 35 const SkBitmap& src, 36 const Context& ctx, 37 SkBitmap* dst, 38 SkIPoint* offset) const SK_OVERRIDE; 39 #if SK_SUPPORT_GPU 40 virtual bool canFilterImageGPU() const SK_OVERRIDE; 41 virtual bool filterImageGPU(Proxy* proxy, const SkBitmap& src, const Context& ctx, 42 SkBitmap* result, SkIPoint* offset) const SK_OVERRIDE; 43 #endif 44 45 protected: 46 SkXfermodeImageFilter(SkXfermode* mode, SkImageFilter* background, 47 SkImageFilter* foreground, const CropRect* cropRect); 48 explicit SkXfermodeImageFilter(SkReadBuffer& buffer); 49 virtual void flatten(SkWriteBuffer&) const SK_OVERRIDE; 50 51 private: 52 SkXfermode* fMode; 53 typedef SkImageFilter INHERITED; 54 }; 55 56 #endif 57
