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 "SkewTransformOperation.h" 24 25 namespace WebCore { 26 27 PassRefPtr<TransformOperation> SkewTransformOperation::blend(const TransformOperation* from, double progress, bool blendToIdentity) 28 { 29 if (from && !from->isSameType(*this)) 30 return this; 31 32 if (blendToIdentity) 33 return SkewTransformOperation::create(m_angleX - m_angleX * progress, m_angleY - m_angleY * progress, m_type); 34 35 const SkewTransformOperation* fromOp = static_cast<const SkewTransformOperation*>(from); 36 double fromAngleX = fromOp ? fromOp->m_angleX : 0; 37 double fromAngleY = fromOp ? fromOp->m_angleY : 0; 38 return SkewTransformOperation::create(fromAngleX + (m_angleX - fromAngleX) * progress, fromAngleY + (m_angleY - fromAngleY) * progress, m_type); 39 } 40 41 } // namespace WebCore 42
