The Tor Browser: gfx/skia/trunk/src/effects/SkPixelXorXfermode.cpp@6474c204b198

Cloned upstream origin tor-browser at tor-browser-31.3.0esr-4.5-1-build1
revision ID fc1c9ff7c1b2defdbc039f12214767608f46423f for hacking purpose.

     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  */

    10 #include "SkPixelXorXfermode.h"

    11 #include "SkColorPriv.h"

    12 #include "SkReadBuffer.h"

    13 #include "SkWriteBuffer.h"

    14 #include "SkString.h"

    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 }

    24 void SkPixelXorXfermode::flatten(SkWriteBuffer& wb) const {

    25     this->INHERITED::flatten(wb);

    26     wb.writeColor(fOpColor);

    27 }

    29 SkPixelXorXfermode::SkPixelXorXfermode(SkReadBuffer& rb)

    30         : INHERITED(rb) {

    31     fOpColor = rb.readColor();

    32 }

    34 #ifndef SK_IGNORE_TO_STRING

    35 void SkPixelXorXfermode::toString(SkString* str) const {

    36     str->append("SkPixelXorXfermode: ");

    37     str->appendHex(fOpColor);

    38 }

    39 #endif

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