| /* |
| * Copyright (C) 2000 Lars Knoll (knoll@kde.org) |
| * (C) 2000 Antti Koivisto (koivisto@kde.org) |
| * (C) 2000 Dirk Mueller (mueller@kde.org) |
| * Copyright (C) 2003, 2005, 2006, 2007, 2008, 2009 Apple Inc. All rights |
| * reserved. |
| * Copyright (C) 2006 Graham Dennis (graham.dennis@gmail.com) |
| * |
| * 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. |
| * |
| */ |
| |
| #ifndef ShadowData_h |
| #define ShadowData_h |
| |
| #include "core/css/StyleColor.h" |
| #include "platform/geometry/FloatPoint.h" |
| #include "platform/geometry/FloatRectOutsets.h" |
| #include "platform/graphics/skia/SkiaUtils.h" |
| |
| namespace blink { |
| |
| enum ShadowStyle { kNormal, kInset }; |
| |
| // This class holds information about shadows for the text-shadow and box-shadow |
| // properties, as well as the drop-shadow(...) filter operation. |
| class ShadowData { |
| USING_FAST_MALLOC(ShadowData); |
| |
| public: |
| ShadowData(const FloatPoint& location, |
| float blur, |
| float spread, |
| ShadowStyle style, |
| StyleColor color) |
| : location_(location), |
| blur_(blur), |
| spread_(spread), |
| color_(color), |
| style_(style) {} |
| |
| bool operator==(const ShadowData&) const; |
| bool operator!=(const ShadowData& o) const { return !(*this == o); } |
| |
| ShadowData Blend(const ShadowData& from, |
| double progress, |
| const Color& current_color) const; |
| static ShadowData NeutralValue(); |
| |
| float X() const { return location_.X(); } |
| float Y() const { return location_.Y(); } |
| FloatPoint Location() const { return location_; } |
| float Blur() const { return blur_; } |
| float Spread() const { return spread_; } |
| ShadowStyle Style() const { return style_; } |
| StyleColor GetColor() const { return color_; } |
| |
| void OverrideColor(Color color) { color_ = StyleColor(color); } |
| |
| // Outsets needed to adjust a source rectangle to the one cast by this |
| // shadow. |
| FloatRectOutsets RectOutsets() const { |
| // 3 * skBlurRadiusToSigma(blur()) is how Skia implements the radius of a |
| // blur. See also https://crbug.com/624175. |
| float blur_and_spread = ceil(3 * SkBlurRadiusToSigma(Blur())) + Spread(); |
| return FloatRectOutsets( |
| blur_and_spread - Y() /* top */, blur_and_spread + X() /* right */, |
| blur_and_spread + Y() /* bottom */, blur_and_spread - X() /* left */); |
| } |
| |
| private: |
| FloatPoint location_; |
| float blur_; |
| float spread_; |
| StyleColor color_; |
| ShadowStyle style_; |
| }; |
| |
| } // namespace blink |
| |
| #endif // ShadowData_h |