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 "core/platform/graphics/transforms/SkewTransformOperation.h" 24 25 #include "core/platform/animation/AnimationUtilities.h" 26 27 namespace WebCore { 28 29 PassRefPtr<TransformOperation> SkewTransformOperation::blend(const TransformOperation* from, double progress, bool blendToIdentity) 30 { 31 if (from && !from->isSameType(*this)) 32 return this; 33 34 if (blendToIdentity) 35 return SkewTransformOperation::create(WebCore::blend(m_angleX, 0.0, progress), WebCore::blend(m_angleY, 0.0, progress), m_type); 36 37 const SkewTransformOperation* fromOp = static_cast<const SkewTransformOperation*>(from); 38 double fromAngleX = fromOp ? fromOp->m_angleX : 0; 39 double fromAngleY = fromOp ? fromOp->m_angleY : 0; 40 return SkewTransformOperation::create(WebCore::blend(fromAngleX, m_angleX, progress), WebCore::blend(fromAngleY, m_angleY, progress), m_type); 41 } 42 43 } // namespace WebCore 44
