1/*
2 * Copyright (C) 2004, 2005, 2008 Nikolas Zimmermann <zimmermann@kde.org>
3 * Copyright (C) 2004, 2005 Rob Buis <buis@kde.org>
4 *
5 * This library is free software; you can redistribute it and/or
6 * modify it under the terms of the GNU Library General Public
7 * License as published by the Free Software Foundation; either
8 * version 2 of the License, or (at your option) any later version.
9 *
10 * This library is distributed in the hope that it will be useful,
11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
13 * Library General Public License for more details.
14 *
15 * You should have received a copy of the GNU Library General Public License
16 * along with this library; see the file COPYING.LIB.  If not, write to
17 * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
18 * Boston, MA 02110-1301, USA.
19 */
20
21#ifndef SVGTransform_h
22#define SVGTransform_h
23
24#include "core/svg/SVGMatrix.h"
25#include "platform/geometry/FloatPoint.h"
26#include "wtf/text/WTFString.h"
27
28namespace WebCore {
29
30class FloatSize;
31
32class SVGTransform {
33public:
34    enum SVGTransformType {
35        SVG_TRANSFORM_UNKNOWN = 0,
36        SVG_TRANSFORM_MATRIX = 1,
37        SVG_TRANSFORM_TRANSLATE = 2,
38        SVG_TRANSFORM_SCALE = 3,
39        SVG_TRANSFORM_ROTATE = 4,
40        SVG_TRANSFORM_SKEWX = 5,
41        SVG_TRANSFORM_SKEWY = 6
42    };
43
44    enum ConstructionMode {
45        ConstructIdentityTransform,
46        ConstructZeroTransform
47    };
48
49    SVGTransform();
50    SVGTransform(SVGTransformType, ConstructionMode = ConstructIdentityTransform);
51    explicit SVGTransform(const AffineTransform&);
52
53    SVGTransformType type() const { return m_type; }
54
55    SVGMatrix& svgMatrix() { return static_cast<SVGMatrix&>(m_matrix); }
56    AffineTransform matrix() const { return m_matrix; }
57    void updateSVGMatrix();
58
59    float angle() const { return m_angle; }
60    FloatPoint rotationCenter() const { return m_center; }
61
62    void setMatrix(const AffineTransform&);
63    void setTranslate(float tx, float ty);
64    void setScale(float sx, float sy);
65    void setRotate(float angle, float cx, float cy);
66    void setSkewX(float angle);
67    void setSkewY(float angle);
68
69    // Internal use only (animation system)
70    FloatPoint translate() const;
71    FloatSize scale() const;
72
73    bool isValid() const { return m_type != SVG_TRANSFORM_UNKNOWN; }
74    String valueAsString() const;
75
76    static const String& transformTypePrefixForParsing(SVGTransformType);
77
78private:
79    friend bool operator==(const SVGTransform& a, const SVGTransform& b);
80
81    SVGTransformType m_type;
82    float m_angle;
83    FloatPoint m_center;
84    AffineTransform m_matrix;
85};
86
87inline bool operator==(const SVGTransform& a, const SVGTransform& b)
88{
89    return a.m_type == b.m_type && a.m_angle == b.m_angle && a.m_matrix == b.m_matrix;
90}
91
92inline bool operator!=(const SVGTransform& a, const SVGTransform& b)
93{
94    return !(a == b);
95}
96
97} // namespace WebCore
98
99#endif
100