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59 lines
2.2 KiB
C++
59 lines
2.2 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/TranslateTransformOperation.h"
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namespace blink {
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PassRefPtr<TransformOperation> TranslateTransformOperation::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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const Length zeroLength(0, Fixed);
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if (blendToIdentity)
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return TranslateTransformOperation::create(
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zeroLength.blend(m_x, progress, ValueRangeAll),
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zeroLength.blend(m_y, progress, ValueRangeAll),
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blink::blend(0., m_z, progress), m_type);
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const TranslateTransformOperation* fromOp =
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static_cast<const TranslateTransformOperation*>(from);
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Length fromX = fromOp ? fromOp->m_x : zeroLength;
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Length fromY = fromOp ? fromOp->m_y : zeroLength;
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double fromZ = fromOp ? fromOp->m_z : 0;
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return TranslateTransformOperation::create(
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m_x.blend(fromX, progress, ValueRangeAll),
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m_y.blend(fromY, progress, ValueRangeAll),
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blink::blend(fromZ, m_z, progress), m_type);
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}
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bool TranslateTransformOperation::canBlendWith(
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const TransformOperation& other) const {
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return other.type() == Translate || other.type() == TranslateX ||
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other.type() == TranslateY || other.type() == TranslateZ ||
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other.type() == Translate3D;
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}
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} // namespace blink
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