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 "SkFlattenableBuffers.h" 13 #include "SkString.h" 14 15 // we always return an opaque color, 'cause I don't know what to do with 16 // the alpha-component and still return a valid premultiplied color. 17 SkPMColor SkPixelXorXfermode::xferColor(SkPMColor src, SkPMColor dst) const { 18 SkPMColor res = src ^ dst ^ fOpColor; 19 res |= (SK_A32_MASK << SK_A32_SHIFT); // force it to be opaque 20 return res; 21 } 22 23 void SkPixelXorXfermode::flatten(SkFlattenableWriteBuffer& wb) const { 24 this->INHERITED::flatten(wb); 25 wb.writeColor(fOpColor); 26 } 27 28 SkPixelXorXfermode::SkPixelXorXfermode(SkFlattenableReadBuffer& rb) 29 : INHERITED(rb) { 30 fOpColor = rb.readColor(); 31 } 32 33 #ifdef SK_DEVELOPER 34 void SkPixelXorXfermode::toString(SkString* str) const { 35 str->append("SkPixelXorXfermode: "); 36 str->appendHex(fOpColor); 37 } 38 #endif 39
