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