1/*
2 * Copyright (C) 2000 Lars Knoll (knoll@kde.org)
3 *           (C) 2000 Antti Koivisto (koivisto@kde.org)
4 *           (C) 2000 Dirk Mueller (mueller@kde.org)
5 * Copyright (C) 2003, 2005, 2006, 2007, 2008 Apple Inc. All rights reserved.
6 * Copyright (C) 2006 Graham Dennis (graham.dennis@gmail.com)
7 *
8 * This library is free software; you can redistribute it and/or
9 * modify it under the terms of the GNU Library General Public
10 * License as published by the Free Software Foundation; either
11 * version 2 of the License, or (at your option) any later version.
12 *
13 * This library is distributed in the hope that it will be useful,
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
16 * Library General Public License for more details.
17 *
18 * You should have received a copy of the GNU Library General Public License
19 * along with this library; see the file COPYING.LIB.  If not, write to
20 * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
21 * Boston, MA 02110-1301, USA.
22 *
23 */
24
25#ifndef IdentityTransformOperation_h
26#define IdentityTransformOperation_h
27
28#include "core/platform/graphics/transforms/TransformOperation.h"
29
30namespace WebCore {
31
32class IdentityTransformOperation : public TransformOperation {
33public:
34    static PassRefPtr<IdentityTransformOperation> create()
35    {
36        return adoptRef(new IdentityTransformOperation());
37    }
38
39private:
40    virtual bool isIdentity() const { return true; }
41    virtual OperationType getOperationType() const { return Identity; }
42    virtual bool isSameType(const TransformOperation& o) const { return o.getOperationType() == Identity; }
43
44    virtual bool operator==(const TransformOperation& o) const
45    {
46        return isSameType(o);
47    }
48
49    virtual bool apply(TransformationMatrix&, const FloatSize&) const
50    {
51        return false;
52    }
53
54    virtual PassRefPtr<TransformOperation> blend(const TransformOperation*, double, bool = false)
55    {
56        return this;
57    }
58
59    IdentityTransformOperation()
60    {
61    }
62
63};
64
65} // namespace WebCore
66
67#endif // IdentityTransformOperation_h
68