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