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
27 namespace blink {
28
blend(const TransformOperation * from,double progress,bool blendToIdentity)29 PassRefPtr<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
canBlendWith(const TransformOperation & other) const49 bool 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