1 /* 2 * Copyright (C) 1999 Antti Koivisto (koivisto (at) 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 "MatrixTransformOperation.h" 24 25 #include <algorithm> 26 27 using namespace std; 28 29 namespace WebCore { 30 31 PassRefPtr<TransformOperation> MatrixTransformOperation::blend(const TransformOperation* from, double progress, bool blendToIdentity) 32 { 33 if (from && !from->isSameType(*this)) 34 return this; 35 36 // convert the TransformOperations into matrices 37 IntSize size; 38 TransformationMatrix fromT; 39 TransformationMatrix toT(m_a, m_b, m_c, m_d, m_e, m_f); 40 if (from) { 41 const MatrixTransformOperation* m = static_cast<const MatrixTransformOperation*>(from); 42 fromT.setMatrix(m->m_a, m->m_b, m->m_c, m->m_d, m->m_e, m->m_f); 43 } 44 45 if (blendToIdentity) 46 std::swap(fromT, toT); 47 48 toT.blend(fromT, progress); 49 return MatrixTransformOperation::create(toT.a(), toT.b(), toT.c(), toT.d(), toT.e(), toT.f()); 50 } 51 52 } // namespace WebCore 53
