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 "ScaleTransformOperation.h"
24
25 namespace WebCore {
26
blend(const TransformOperation * from,double progress,bool blendToIdentity)27 PassRefPtr<TransformOperation> ScaleTransformOperation::blend(const TransformOperation* from, double progress, bool blendToIdentity)
28 {
29 if (from && !from->isSameType(*this))
30 return this;
31
32 if (blendToIdentity)
33 return ScaleTransformOperation::create(m_x + (1. - m_x) * progress,
34 m_y + (1. - m_y) * progress,
35 m_z + (1. - m_z) * progress, m_type);
36
37 const ScaleTransformOperation* fromOp = static_cast<const ScaleTransformOperation*>(from);
38 double fromX = fromOp ? fromOp->m_x : 1.;
39 double fromY = fromOp ? fromOp->m_y : 1.;
40 double fromZ = fromOp ? fromOp->m_z : 1.;
41 return ScaleTransformOperation::create(fromX + (m_x - fromX) * progress,
42 fromY + (m_y - fromY) * progress,
43 fromZ + (m_z - fromZ) * progress, m_type);
44 }
45
46 } // namespace WebCore
47