michael@0: 
michael@0: /*
michael@0:  * Copyright 2011 Google Inc.
michael@0:  *
michael@0:  * Use of this source code is governed by a BSD-style license that can be
michael@0:  * found in the LICENSE file.
michael@0:  */
michael@0: 
michael@0: 
michael@0: #include "SkPixelXorXfermode.h"
michael@0: #include "SkColorPriv.h"
michael@0: #include "SkReadBuffer.h"
michael@0: #include "SkWriteBuffer.h"
michael@0: #include "SkString.h"
michael@0: 
michael@0: // we always return an opaque color, 'cause I don't know what to do with
michael@0: // the alpha-component and still return a valid premultiplied color.
michael@0: SkPMColor SkPixelXorXfermode::xferColor(SkPMColor src, SkPMColor dst) const {
michael@0:     SkPMColor res = src ^ dst ^ fOpColor;
michael@0:     res |= (SK_A32_MASK << SK_A32_SHIFT);   // force it to be opaque
michael@0:     return res;
michael@0: }
michael@0: 
michael@0: void SkPixelXorXfermode::flatten(SkWriteBuffer& wb) const {
michael@0:     this->INHERITED::flatten(wb);
michael@0:     wb.writeColor(fOpColor);
michael@0: }
michael@0: 
michael@0: SkPixelXorXfermode::SkPixelXorXfermode(SkReadBuffer& rb)
michael@0:         : INHERITED(rb) {
michael@0:     fOpColor = rb.readColor();
michael@0: }
michael@0: 
michael@0: #ifndef SK_IGNORE_TO_STRING
michael@0: void SkPixelXorXfermode::toString(SkString* str) const {
michael@0:     str->append("SkPixelXorXfermode: ");
michael@0:     str->appendHex(fOpColor);
michael@0: }
michael@0: #endif