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/ScaleTransformOperation.h" 24 25#include "platform/animation/AnimationUtilities.h" 26 27namespace blink { 28 29PassRefPtr<TransformOperation> ScaleTransformOperation::blend(const TransformOperation* from, double progress, bool blendToIdentity) 30{ 31 if (from && !from->canBlendWith(*this)) 32 return this; 33 34 if (blendToIdentity) 35 return ScaleTransformOperation::create(blink::blend(m_x, 1.0, progress), 36 blink::blend(m_y, 1.0, progress), 37 blink::blend(m_z, 1.0, progress), m_type); 38 39 const ScaleTransformOperation* fromOp = static_cast<const ScaleTransformOperation*>(from); 40 double fromX = fromOp ? fromOp->m_x : 1.0; 41 double fromY = fromOp ? fromOp->m_y : 1.0; 42 double fromZ = fromOp ? fromOp->m_z : 1.0; 43 return ScaleTransformOperation::create(blink::blend(fromX, m_x, progress), 44 blink::blend(fromY, m_y, progress), 45 blink::blend(fromZ, m_z, progress), m_type); 46} 47 48 49bool ScaleTransformOperation::canBlendWith(const TransformOperation& other) const 50{ 51 return other.type() == ScaleX 52 || other.type() == ScaleY 53 || other.type() == ScaleZ 54 || other.type() == Scale3D 55 || other.type() == Scale; 56} 57 58} // namespace blink 59