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 "TransformOperation.h"
29 
30 namespace WebCore {
31 
32 class IdentityTransformOperation : public TransformOperation {
33 public:
create()34     static PassRefPtr<IdentityTransformOperation> create()
35     {
36         return adoptRef(new IdentityTransformOperation());
37     }
38 
39 private:
isIdentity()40     virtual bool isIdentity() const { return true; }
getOperationType()41     virtual OperationType getOperationType() const { return IDENTITY; }
isSameType(const TransformOperation & o)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 
apply(TransformationMatrix &,const IntSize &)49     virtual bool apply(TransformationMatrix&, const IntSize&) const
50     {
51         return false;
52     }
53 
54     virtual PassRefPtr<TransformOperation> blend(const TransformOperation*, double, bool = false)
55     {
56         return this;
57     }
58 
IdentityTransformOperation()59     IdentityTransformOperation()
60     {
61     }
62 
63 };
64 
65 } // namespace WebCore
66 
67 #endif // IdentityTransformOperation_h
68