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/*
* 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::NeutralValue() {
return ShadowData(FloatPoint(0, 0), 0, 0, ShadowStyle::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
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