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/*
* Copyright (C) 1999 Antti Koivisto (koivisto@kde.org)
* Copyright (C) 2004, 2005, 2006, 2007, 2008 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 "platform/transforms/SkewTransformOperation.h"
#include "platform/animation/AnimationUtilities.h"
namespace blink {
PassRefPtr<TransformOperation> SkewTransformOperation::blend(
const TransformOperation* from,
double progress,
bool blendToIdentity) {
if (from && !from->canBlendWith(*this))
return this;
if (blendToIdentity)
return SkewTransformOperation::create(blink::blend(m_angleX, 0.0, progress),
blink::blend(m_angleY, 0.0, progress),
m_type);
const SkewTransformOperation* fromOp =
static_cast<const SkewTransformOperation*>(from);
double fromAngleX = fromOp ? fromOp->m_angleX : 0;
double fromAngleY = fromOp ? fromOp->m_angleY : 0;
return SkewTransformOperation::create(
blink::blend(fromAngleX, m_angleX, progress),
blink::blend(fromAngleY, m_angleY, progress), m_type);
}
bool SkewTransformOperation::canBlendWith(
const TransformOperation& other) const {
return other.type() == Skew || other.type() == SkewX || other.type() == SkewY;
}
} // namespace blink
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