| /* |
| * Copyright (C) 1999 Antti Koivisto (koivisto@kde.org) |
| * Copyright (C) 2004, 2005, 2006, 2007, 2008, 2009 Apple Inc. All rights |
| * reserved. |
| * |
| * This library is free software; you can redistribute it and/or |
| * modify it under the terms of the GNU Library General Public |
| * License as published by the Free Software Foundation; either |
| * version 2 of the License, or (at your option) any later version. |
| * |
| * This library is distributed in the hope that it will be useful, |
| * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| * Library General Public License for more details. |
| * |
| * You should have received a copy of the GNU Library General Public License |
| * along with this library; see the file COPYING.LIB. If not, write to |
| * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, |
| * Boston, MA 02110-1301, USA. |
| * |
| */ |
| |
| #include "third_party/blink/renderer/core/style/shadow_data.h" |
| |
| #include "third_party/blink/renderer/platform/animation/animation_utilities.h" |
| #include "third_party/blink/renderer/platform/graphics/color_blend.h" |
| #include "third_party/blink/renderer/platform/graphics/skia/skia_utils.h" |
| |
| namespace blink { |
| |
| bool ShadowData::operator==(const ShadowData& o) const { |
| return location_ == o.location_ && blur_ == o.blur_ && spread_ == o.spread_ && |
| style_ == o.style_ && color_ == o.color_; |
| } |
| |
| ShadowData ShadowData::Blend(const ShadowData& from, |
| double progress, |
| const Color& current_color) const { |
| DCHECK_EQ(Style(), from.Style()); |
| return ShadowData(blink::Blend(from.Location(), Location(), progress), |
| clampTo(blink::Blend(from.Blur(), Blur(), progress), 0.0f), |
| blink::Blend(from.Spread(), Spread(), progress), Style(), |
| blink::Blend(from.GetColor().Resolve(current_color), |
| GetColor().Resolve(current_color), progress)); |
| } |
| |
| ShadowData ShadowData::NeutralValue() { |
| return ShadowData(FloatPoint(0, 0), 0, 0, kNormal, |
| StyleColor(Color::kTransparent)); |
| } |
| |
| FloatRectOutsets ShadowData::RectOutsets() const { |
| // 3 * sigma is how Skia computes the box blur extent. |
| // See also https://crbug.com/624175. |
| // TODO(fmalita): since the blur extent must reflect rasterization bounds, |
| // its value should be queried from Skia (pending API availability). |
| float blur_and_spread = ceil(3 * BlurRadiusToStdDev(Blur())) + Spread(); |
| return FloatRectOutsets( |
| blur_and_spread - Y() /* top */, blur_and_spread + X() /* right */, |
| blur_and_spread + Y() /* bottom */, blur_and_spread - X() /* left */); |
| } |
| |
| } // namespace blink |