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 SkewTransformOperation_h
26#define SkewTransformOperation_h
27
28#include "TransformOperation.h"
29
30namespace WebCore {
31
32class SkewTransformOperation : public TransformOperation {
33public:
34    static PassRefPtr<SkewTransformOperation> create(double angleX, double angleY, OperationType type)
35    {
36        return adoptRef(new SkewTransformOperation(angleX, angleY, type));
37    }
38
39    double angleX() const { return m_angleX; }
40    double angleY() const { return m_angleY; }
41
42private:
43    virtual bool isIdentity() const { return m_angleX == 0 && m_angleY == 0; }
44    virtual OperationType getOperationType() const { return m_type; }
45    virtual bool isSameType(const TransformOperation& o) const { return o.getOperationType() == m_type; }
46
47    virtual bool operator==(const TransformOperation& o) const
48    {
49        if (!isSameType(o))
50            return false;
51        const SkewTransformOperation* s = static_cast<const SkewTransformOperation*>(&o);
52        return m_angleX == s->m_angleX && m_angleY == s->m_angleY;
53    }
54
55    virtual bool apply(TransformationMatrix& transform, const FloatSize&) const
56    {
57        transform.skew(m_angleX, m_angleY);
58        return false;
59    }
60
61    virtual PassRefPtr<TransformOperation> blend(const TransformOperation* from, double progress, bool blendToIdentity = false);
62
63    SkewTransformOperation(double angleX, double angleY, OperationType type)
64        : m_angleX(angleX)
65        , m_angleY(angleY)
66        , m_type(type)
67    {
68    }
69
70    double m_angleX;
71    double m_angleY;
72    OperationType m_type;
73};
74
75} // namespace WebCore
76
77#endif // SkewTransformOperation_h
78