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55 lines
2.0 KiB
C++
55 lines
2.0 KiB
C++
/*
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* Copyright (C) 1999 Antti Koivisto (koivisto@kde.org)
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* Copyright (C) 2004, 2005, 2006, 2007, 2008 Apple Inc. All rights reserved.
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Library General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Library General Public License for more details.
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*
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* You should have received a copy of the GNU Library General Public License
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* along with this library; see the file COPYING.LIB. If not, write to
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* the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
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* Boston, MA 02110-1301, USA.
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*
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*/
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#include "flutter/sky/engine/platform/transforms/SkewTransformOperation.h"
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#include "flutter/sky/engine/platform/animation/AnimationUtilities.h"
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namespace blink {
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PassRefPtr<TransformOperation> SkewTransformOperation::blend(
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const TransformOperation* from,
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double progress,
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bool blendToIdentity) {
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if (from && !from->canBlendWith(*this))
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return this;
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if (blendToIdentity)
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return SkewTransformOperation::create(blink::blend(m_angleX, 0.0, progress),
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blink::blend(m_angleY, 0.0, progress),
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m_type);
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const SkewTransformOperation* fromOp =
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static_cast<const SkewTransformOperation*>(from);
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double fromAngleX = fromOp ? fromOp->m_angleX : 0;
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double fromAngleY = fromOp ? fromOp->m_angleY : 0;
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return SkewTransformOperation::create(
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blink::blend(fromAngleX, m_angleX, progress),
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blink::blend(fromAngleY, m_angleY, progress), m_type);
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}
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bool SkewTransformOperation::canBlendWith(
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const TransformOperation& other) const {
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return other.type() == Skew || other.type() == SkewX || other.type() == SkewY;
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}
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} // namespace blink
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