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. xferColor(SkPMColor src,SkPMColor dst) const18SkPMColor 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 flatten(SkWriteBuffer & wb) const24void SkPixelXorXfermode::flatten(SkWriteBuffer& wb) const { 25 wb.writeColor(fOpColor); 26 } 27 CreateProc(SkReadBuffer & buffer)28SkFlattenable* SkPixelXorXfermode::CreateProc(SkReadBuffer& buffer) { 29 return Create(buffer.readColor()); 30 } 31 32 #ifndef SK_IGNORE_TO_STRING toString(SkString * str) const33void SkPixelXorXfermode::toString(SkString* str) const { 34 str->append("SkPixelXorXfermode: "); 35 str->appendHex(fOpColor); 36 } 37 #endif 38