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 SkImageFilter* inputs[2] = { background, foreground }; 30 return SkNEW_ARGS(SkXfermodeImageFilter, (mode, inputs, cropRect)); 31 } 32 33 SK_TO_STRING_OVERRIDE() 34 SK_DECLARE_PUBLIC_FLATTENABLE_DESERIALIZATION_PROCS(SkXfermodeImageFilter) 35 36 virtual bool onFilterImage(Proxy* proxy, 37 const SkBitmap& src, 38 const Context& ctx, 39 SkBitmap* dst, 40 SkIPoint* offset) const override; 41 #if SK_SUPPORT_GPU 42 bool canFilterImageGPU() const override; 43 virtual bool filterImageGPU(Proxy* proxy, const SkBitmap& src, const Context& ctx, 44 SkBitmap* result, SkIPoint* offset) const override; 45 #endif 46 47 protected: 48 SkXfermodeImageFilter(SkXfermode* mode, SkImageFilter* inputs[2], 49 const CropRect* cropRect); 50 void flatten(SkWriteBuffer&) const override; 51 52 private: 53 SkXfermode* fMode; 54 typedef SkImageFilter INHERITED; 55 }; 56 57 #endif 58
