1 /* 2 * Copyright 2007 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 SkPixelXorXfermode_DEFINED 9 #define SkPixelXorXfermode_DEFINED 10 11 #include "SkXfermode.h" 12 13 /** SkPixelXorXfermode implements a simple pixel xor (op ^ src ^ dst). 14 This transformation does not follow premultiplied conventions, therefore 15 this proc *always* returns an opaque color (alpha == 255). Thus it is 16 not really usefull for operating on blended colors. 17 */ 18 class SK_API SkPixelXorXfermode : public SkXfermode { 19 public: SkPixelXorXfermode(SkColor opColor)20 SkPixelXorXfermode(SkColor opColor) : fOpColor(opColor) {} 21 22 SK_DEVELOPER_TO_STRING() 23 SK_DECLARE_PUBLIC_FLATTENABLE_DESERIALIZATION_PROCS(SkPixelXorXfermode) 24 25 protected: 26 SkPixelXorXfermode(SkFlattenableReadBuffer& rb); 27 virtual void flatten(SkFlattenableWriteBuffer&) const SK_OVERRIDE; 28 29 // override from SkXfermode 30 virtual SkPMColor xferColor(SkPMColor src, SkPMColor dst) const; 31 32 private: 33 SkColor fOpColor; 34 35 typedef SkXfermode INHERITED; 36 }; 37 38 #endif 39