9fa60daad4
Refactoring pattern: 1. guard the existing constructor(readbuffer) with the legacy build-flag 2. If you are a instancable subclass, implement CreateProc(readbuffer) to create a new instances from the buffer params (or return NULL). If you're a shader subclass 1. You must read/write the local matrix if your class accepts that in its factory/constructor, else ignore it. R=robertphillips@google.com, mtklein@google.com, senorblanco@google.com, senorblanco@chromium.org, sugoi@chromium.org Author: reed@google.com Review URL: https://codereview.chromium.org/395603002
44 lines
1.1 KiB
C++
44 lines
1.1 KiB
C++
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/*
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* Copyright 2011 Google Inc.
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*
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* Use of this source code is governed by a BSD-style license that can be
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* found in the LICENSE file.
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*/
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#include "SkPixelXorXfermode.h"
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#include "SkColorPriv.h"
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#include "SkReadBuffer.h"
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#include "SkWriteBuffer.h"
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#include "SkString.h"
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// we always return an opaque color, 'cause I don't know what to do with
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// the alpha-component and still return a valid premultiplied color.
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SkPMColor SkPixelXorXfermode::xferColor(SkPMColor src, SkPMColor dst) const {
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SkPMColor res = src ^ dst ^ fOpColor;
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res |= (SK_A32_MASK << SK_A32_SHIFT); // force it to be opaque
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return res;
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}
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void SkPixelXorXfermode::flatten(SkWriteBuffer& wb) const {
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wb.writeColor(fOpColor);
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}
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#ifdef SK_SUPPORT_LEGACY_DEEPFLATTENING
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SkPixelXorXfermode::SkPixelXorXfermode(SkReadBuffer& rb) : INHERITED(rb) {
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fOpColor = rb.readColor();
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}
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#endif
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SkFlattenable* SkPixelXorXfermode::CreateProc(SkReadBuffer& buffer) {
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return Create(buffer.readColor());
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}
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#ifndef SK_IGNORE_TO_STRING
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void SkPixelXorXfermode::toString(SkString* str) const {
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str->append("SkPixelXorXfermode: ");
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str->appendHex(fOpColor);
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}
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#endif
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