1 2/* 3 * Copyright 2011 Google Inc. 4 * 5 * Use of this source code is governed by a BSD-style license that can be 6 * found in the LICENSE file. 7 */ 8 9 10#include "SkPixelXorXfermode.h" 11#include "SkColorPriv.h" 12#include "SkReadBuffer.h" 13#include "SkWriteBuffer.h" 14#include "SkString.h" 15 16// we always return an opaque color, 'cause I don't know what to do with 17// the alpha-component and still return a valid premultiplied color. 18SkPMColor SkPixelXorXfermode::xferColor(SkPMColor src, SkPMColor dst) const { 19 SkPMColor res = src ^ dst ^ fOpColor; 20 res |= (SK_A32_MASK << SK_A32_SHIFT); // force it to be opaque 21 return res; 22} 23 24void SkPixelXorXfermode::flatten(SkWriteBuffer& wb) const { 25 wb.writeColor(fOpColor); 26} 27 28SkFlattenable* SkPixelXorXfermode::CreateProc(SkReadBuffer& buffer) { 29 return Create(buffer.readColor()); 30} 31 32#ifndef SK_IGNORE_TO_STRING 33void SkPixelXorXfermode::toString(SkString* str) const { 34 str->append("SkPixelXorXfermode: "); 35 str->appendHex(fOpColor); 36} 37#endif 38