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 "FloatSize.h"
29#include "TransformationMatrix.h"
30#include <wtf/PassRefPtr.h>
31#include <wtf/RefCounted.h>
32
33namespace WebCore {
34
35// CSS Transforms (may become part of CSS3)
36
37class TransformOperation : public RefCounted<TransformOperation> {
38public:
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
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 FloatSize& 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;
67    virtual bool isSameType(const TransformOperation&) const { return false; }
68
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