| /* |
| Copyright 2011 Google Inc. |
| |
| Licensed under the Apache License, Version 2.0 (the "License"); |
| you may not use this file except in compliance with the License. |
| You may obtain a copy of the License at |
| |
| http://www.apache.org/licenses/LICENSE-2.0 |
| |
| Unless required by applicable law or agreed to in writing, software |
| distributed under the License is distributed on an "AS IS" BASIS, |
| WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| See the License for the specific language governing permissions and |
| limitations under the License. |
| */ |
| |
| #include "SkPixelXorXfermode.h" |
| #include "SkColorPriv.h" |
| |
| // we always return an opaque color, 'cause I don't know what to do with |
| // the alpha-component and still return a valid premultiplied color. |
| SkPMColor SkPixelXorXfermode::xferColor(SkPMColor src, SkPMColor dst) { |
| SkPMColor res = src ^ dst ^ fOpColor; |
| res |= (SK_A32_MASK << SK_A32_SHIFT); // force it to be opaque |
| return res; |
| } |
| |
| void SkPixelXorXfermode::flatten(SkFlattenableWriteBuffer& wb) { |
| this->INHERITED::flatten(wb); |
| wb.write32(fOpColor); |
| } |
| |
| SkPixelXorXfermode::SkPixelXorXfermode(SkFlattenableReadBuffer& rb) |
| : SkXfermode(rb) { |
| fOpColor = rb.readU32(); |
| } |
| |
| SkFlattenable::Factory SkPixelXorXfermode::getFactory() { |
| return Create; |
| } |
| |
| SkFlattenable* SkPixelXorXfermode::Create(SkFlattenableReadBuffer& rb) { |
| return SkNEW_ARGS(SkPixelXorXfermode, (rb)); |
| } |
| |