| /* |
| * Copyright (C) 2013 Google Inc. All rights reserved. |
| * |
| * Redistribution and use in source and binary forms, with or without |
| * modification, are permitted provided that the following conditions are |
| * met: |
| * |
| * * Redistributions of source code must retain the above copyright |
| * notice, this list of conditions and the following disclaimer. |
| * * Redistributions in binary form must reproduce the above |
| * copyright notice, this list of conditions and the following disclaimer |
| * in the documentation and/or other materials provided with the |
| * distribution. |
| * * Neither the name of Google Inc. nor the names of its |
| * contributors may be used to endorse or promote products derived from |
| * this software without specific prior written permission. |
| * |
| * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS |
| * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT |
| * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR |
| * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT |
| * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, |
| * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT |
| * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
| * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
| * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
| * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE |
| * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| */ |
| |
| #include "core/style/ShadowList.h" |
| |
| #include "platform/geometry/FloatRect.h" |
| #include <memory> |
| |
| namespace blink { |
| |
| FloatRectOutsets ShadowList::rectOutsetsIncludingOriginal() const |
| { |
| FloatRectOutsets outsets; |
| for (const ShadowData& shadow : shadows()) { |
| if (shadow.style() == Inset) |
| continue; |
| outsets.unite(shadow.rectOutsets()); |
| } |
| return outsets; |
| } |
| |
| void ShadowList::adjustRectForShadow(FloatRect& rect) const |
| { |
| rect.expand(rectOutsetsIncludingOriginal()); |
| } |
| |
| PassRefPtr<ShadowList> ShadowList::blend(const ShadowList* from, const ShadowList* to, double progress, const Color& currentColor) |
| { |
| size_t fromLength = from ? from->shadows().size() : 0; |
| size_t toLength = to ? to->shadows().size() : 0; |
| if (!fromLength && !toLength) |
| return nullptr; |
| |
| ShadowDataVector shadows; |
| |
| DEFINE_STATIC_LOCAL(ShadowData, defaultShadowData, (FloatPoint(), 0, 0, Normal, StyleColor(Color::transparent))); |
| DEFINE_STATIC_LOCAL(ShadowData, defaultInsetShadowData, (FloatPoint(), 0, 0, Inset, StyleColor(Color::transparent))); |
| |
| size_t maxLength = std::max(fromLength, toLength); |
| for (size_t i = 0; i < maxLength; ++i) { |
| const ShadowData* fromShadow = i < fromLength ? &from->shadows()[i] : 0; |
| const ShadowData* toShadow = i < toLength ? &to->shadows()[i] : 0; |
| if (!fromShadow) |
| fromShadow = toShadow->style() == Inset ? &defaultInsetShadowData : &defaultShadowData; |
| else if (!toShadow) |
| toShadow = fromShadow->style() == Inset ? &defaultInsetShadowData : &defaultShadowData; |
| shadows.append(toShadow->blend(*fromShadow, progress, currentColor)); |
| } |
| |
| return ShadowList::adopt(shadows); |
| } |
| |
| std::unique_ptr<DrawLooperBuilder> ShadowList::createDrawLooper(DrawLooperBuilder::ShadowAlphaMode alphaMode, const Color& currentColor, bool isHorizontal) const |
| { |
| std::unique_ptr<DrawLooperBuilder> drawLooperBuilder = DrawLooperBuilder::create(); |
| for (size_t i = shadows().size(); i--; ) { |
| const ShadowData& shadow = shadows()[i]; |
| float shadowX = isHorizontal ? shadow.x() : shadow.y(); |
| float shadowY = isHorizontal ? shadow.y() : -shadow.x(); |
| drawLooperBuilder->addShadow(FloatSize(shadowX, shadowY), shadow.blur(), shadow.color().resolve(currentColor), |
| DrawLooperBuilder::ShadowRespectsTransforms, alphaMode); |
| } |
| drawLooperBuilder->addUnmodifiedContent(); |
| return drawLooperBuilder; |
| } |
| |
| } // namespace blink |