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 TransformOperation_h
26 #define TransformOperation_h
27 
28 #include "TransformationMatrix.h"
29 #include "IntSize.h"
30 #include <wtf/PassRefPtr.h>
31 #include <wtf/RefCounted.h>
32 
33 namespace WebCore {
34 
35 // CSS Transforms (may become part of CSS3)
36 
37 class TransformOperation : public RefCounted<TransformOperation> {
38 public:
39     enum OperationType {
40         SCALE_X, SCALE_Y, SCALE,
41         TRANSLATE_X, TRANSLATE_Y, TRANSLATE,
42         ROTATE,
43         ROTATE_Z = ROTATE,
44         SKEW_X, SKEW_Y, SKEW,
45         MATRIX,
46         SCALE_Z, SCALE_3D,
47         TRANSLATE_Z, TRANSLATE_3D,
48         ROTATE_X, ROTATE_Y, ROTATE_3D,
49         MATRIX_3D,
50         PERSPECTIVE,
51         IDENTITY, NONE
52     };
53 
~TransformOperation()54     virtual ~TransformOperation() { }
55 
56     virtual bool operator==(const TransformOperation&) const = 0;
57     bool operator!=(const TransformOperation& o) const { return !(*this == o); }
58 
59     virtual bool isIdentity() const = 0;
60 
61     // Return true if the borderBoxSize was used in the computation, false otherwise.
62     virtual bool apply(TransformationMatrix&, const IntSize& borderBoxSize) const = 0;
63 
64     virtual PassRefPtr<TransformOperation> blend(const TransformOperation* from, double progress, bool blendToIdentity = false) = 0;
65 
66     virtual OperationType getOperationType() const = 0;
isSameType(const TransformOperation &)67     virtual bool isSameType(const TransformOperation&) const { return false; }
68 
is3DOperation()69     bool is3DOperation() const
70     {
71         OperationType opType = getOperationType();
72         return opType == SCALE_Z ||
73                opType == SCALE_3D ||
74                opType == TRANSLATE_Z ||
75                opType == TRANSLATE_3D ||
76                opType == ROTATE_X ||
77                opType == ROTATE_Y ||
78                opType == ROTATE_3D ||
79                opType == MATRIX_3D ||
80                opType == PERSPECTIVE;
81     }
82 };
83 
84 } // namespace WebCore
85 
86 #endif // TransformOperation_h
87