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 "platform/geometry/FloatSize.h"
29#include "platform/transforms/TransformationMatrix.h"
30#include "wtf/PassRefPtr.h"
31#include "wtf/RefCounted.h"
32
33namespace blink {
34
35// CSS Transforms (may become part of CSS3)
36
37class PLATFORM_EXPORT TransformOperation : public RefCounted<TransformOperation> {
38public:
39    enum OperationType {
40        ScaleX, ScaleY, Scale,
41        TranslateX, TranslateY, Translate,
42        Rotate,
43        RotateZ = Rotate,
44        SkewX, SkewY, Skew,
45        Matrix,
46        ScaleZ, Scale3D,
47        TranslateZ, Translate3D,
48        RotateX, RotateY, Rotate3D,
49        Matrix3D,
50        Perspective,
51        Interpolated,
52        Identity, None
53    };
54
55    virtual ~TransformOperation() { }
56
57    virtual bool operator==(const TransformOperation&) const = 0;
58    bool operator!=(const TransformOperation& o) const { return !(*this == o); }
59
60    virtual void apply(TransformationMatrix&, const FloatSize& borderBoxSize) const = 0;
61
62    virtual PassRefPtr<TransformOperation> blend(const TransformOperation* from, double progress, bool blendToIdentity = false) = 0;
63
64    virtual OperationType type() const = 0;
65    bool isSameType(const TransformOperation& other) const { return other.type() == type(); }
66    virtual bool canBlendWith(const TransformOperation& other) const = 0;
67
68    bool is3DOperation() const
69    {
70        OperationType opType = type();
71        return opType == ScaleZ
72            || opType == Scale3D
73            || opType == TranslateZ
74            || opType == Translate3D
75            || opType == RotateX
76            || opType == RotateY
77            || opType == Rotate3D
78            || opType == Matrix3D
79            || opType == Perspective
80            || opType == Interpolated;
81    }
82
83    virtual bool dependsOnBoxSize() const { return false; }
84};
85
86} // namespace blink
87
88#endif // TransformOperation_h
89