SkPixelXorXfermode.h revision 0f10f7bf1fb43ca6346dc220a076773b1f19a367
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*/ 18class SK_API SkPixelXorXfermode : public SkXfermode { 19public: 20 static SkPixelXorXfermode* Create(SkColor opColor) { 21 return SkNEW_ARGS(SkPixelXorXfermode, (opColor)); 22 } 23 24 SK_TO_STRING_OVERRIDE() 25 SK_DECLARE_PUBLIC_FLATTENABLE_DESERIALIZATION_PROCS(SkPixelXorXfermode) 26 27protected: 28 SkPixelXorXfermode(SkReadBuffer& rb); 29 virtual void flatten(SkWriteBuffer&) const SK_OVERRIDE; 30 31 // override from SkXfermode 32 virtual SkPMColor xferColor(SkPMColor src, SkPMColor dst) const; 33 34#ifdef SK_SUPPORT_LEGACY_PUBLICEFFECTCONSTRUCTORS 35public: 36#endif 37 SkPixelXorXfermode(SkColor opColor) : fOpColor(opColor) {} 38 39private: 40 SkColor fOpColor; 41 42 typedef SkXfermode INHERITED; 43}; 44 45#endif 46