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. 18 SkPMColor 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 24 void SkPixelXorXfermode::flatten(SkWriteBuffer& wb) const { 25 this->INHERITED::flatten(wb); 26 wb.writeColor(fOpColor); 27 } 28 29 SkPixelXorXfermode::SkPixelXorXfermode(SkReadBuffer& rb) 30 : INHERITED(rb) { 31 fOpColor = rb.readColor(); 32 } 33 34 #ifndef SK_IGNORE_TO_STRING 35 void SkPixelXorXfermode::toString(SkString* str) const { 36 str->append("SkPixelXorXfermode: "); 37 str->appendHex(fOpColor); 38 } 39 #endif 40
