1/* 2 * Copyright (C) 1999 Antti Koivisto (koivisto@kde.org) 3 * Copyright (C) 2004, 2005, 2006, 2007, 2008 Apple Inc. All rights reserved. 4 * 5 * This library is free software; you can redistribute it and/or 6 * modify it under the terms of the GNU Library General Public 7 * License as published by the Free Software Foundation; either 8 * version 2 of the License, or (at your option) any later version. 9 * 10 * This library is distributed in the hope that it will be useful, 11 * but WITHOUT ANY WARRANTY; without even the implied warranty of 12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 13 * Library General Public License for more details. 14 * 15 * You should have received a copy of the GNU Library General Public License 16 * along with this library; see the file COPYING.LIB. If not, write to 17 * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, 18 * Boston, MA 02110-1301, USA. 19 * 20 */ 21 22#include "config.h" 23#include "platform/transforms/MatrixTransformOperation.h" 24 25#include <algorithm> 26 27namespace blink { 28 29PassRefPtr<TransformOperation> MatrixTransformOperation::blend(const TransformOperation* from, double progress, bool blendToIdentity) 30{ 31 if (from && !from->isSameType(*this)) 32 return this; 33 34 // convert the TransformOperations into matrices 35 FloatSize size; 36 TransformationMatrix fromT; 37 TransformationMatrix toT(m_a, m_b, m_c, m_d, m_e, m_f); 38 if (from) { 39 const MatrixTransformOperation* m = static_cast<const MatrixTransformOperation*>(from); 40 fromT.setMatrix(m->m_a, m->m_b, m->m_c, m->m_d, m->m_e, m->m_f); 41 } 42 43 if (blendToIdentity) 44 std::swap(fromT, toT); 45 46 toT.blend(fromT, progress); 47 return MatrixTransformOperation::create(toT.a(), toT.b(), toT.c(), toT.d(), toT.e(), toT.f()); 48} 49 50} // namespace blink 51