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50 lines
1.8 KiB
C++
50 lines
1.8 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/MatrixTransformOperation.h"
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#include <algorithm>
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namespace blink {
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PassRefPtr<TransformOperation> MatrixTransformOperation::blend(const TransformOperation* from, double progress, bool blendToIdentity)
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{
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if (from && !from->isSameType(*this))
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return this;
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// convert the TransformOperations into matrices
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FloatSize size;
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TransformationMatrix fromT;
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TransformationMatrix toT(m_a, m_b, m_c, m_d, m_e, m_f);
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if (from) {
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const MatrixTransformOperation* m = static_cast<const MatrixTransformOperation*>(from);
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fromT.setMatrix(m->m_a, m->m_b, m->m_c, m->m_d, m->m_e, m->m_f);
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}
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if (blendToIdentity)
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std::swap(fromT, toT);
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toT.blend(fromT, progress);
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return MatrixTransformOperation::create(toT.a(), toT.b(), toT.c(), toT.d(), toT.e(), toT.f());
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}
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} // namespace blink
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