summaryrefslogtreecommitdiffstats
path: root/WebCore/platform/graphics/Path.h
blob: 6b617a0aabddf1936c95e657eee1ca62a4c297f5 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
/*
 * Copyright (C) 2003, 2006, 2009 Apple Inc. All rights reserved.
 *               2006 Rob Buis <buis@kde.org>
 * Copyright (C) 2007-2008 Torch Mobile, Inc.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 *
 * THIS SOFTWARE IS PROVIDED BY APPLE COMPUTER, INC. ``AS IS'' AND ANY
 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
 * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL APPLE COMPUTER, INC. OR
 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
 * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 
 */

#ifndef Path_h
#define Path_h

#include <algorithm>

#if PLATFORM(CG)
typedef struct CGPath PlatformPath;
#elif PLATFORM(QT)
#include <qglobal.h>
QT_BEGIN_NAMESPACE
class QPainterPath;
QT_END_NAMESPACE
typedef QPainterPath PlatformPath;
#elif PLATFORM(SGL)
class SkPath;
typedef SkPath PlatformPath;
#elif PLATFORM(WX) && USE(WXGC)
class wxGraphicsPath;
typedef wxGraphicsPath PlatformPath;
#elif PLATFORM(CAIRO)
namespace WebCore {
    struct CairoPath;
}
typedef WebCore::CairoPath PlatformPath;
#elif PLATFORM(SKIA)
class SkPath;
typedef SkPath PlatformPath;
#elif PLATFORM(HAIKU)
class BRegion;
typedef BRegion PlatformPath;
#elif PLATFORM(WINCE)
namespace WebCore {
    class PlatformPath;
}
#else
typedef void PlatformPath;
#endif

namespace WebCore {

    class FloatPoint;
    class FloatRect;
    class FloatSize;
    class GraphicsContext;
    class String;
    class StrokeStyleApplier;
    class TransformationMatrix;

    enum WindRule {
        RULE_NONZERO = 0,
        RULE_EVENODD = 1
    };

    enum PathElementType {
        PathElementMoveToPoint,
        PathElementAddLineToPoint,
        PathElementAddQuadCurveToPoint,
        PathElementAddCurveToPoint,
        PathElementCloseSubpath
    };

    struct PathElement {
        PathElementType type;
        FloatPoint* points;
    };

    typedef void (*PathApplierFunction)(void* info, const PathElement*);

    class Path {
    public:
        Path();
        ~Path();

        Path(const Path&);
        Path& operator=(const Path&);

        void swap(Path& other) { std::swap(m_path, other.m_path); }

        bool contains(const FloatPoint&, WindRule rule = RULE_NONZERO) const;
        bool strokeContains(StrokeStyleApplier*, const FloatPoint&) const;
        FloatRect boundingRect() const;
        FloatRect strokeBoundingRect(StrokeStyleApplier* = 0);
        
        float length();
        FloatPoint pointAtLength(float length, bool& ok);
        float normalAngleAtLength(float length, bool& ok);

        void clear();
        bool isEmpty() const;
        // Gets the current point of the current path, which is conceptually the final point reached by the path so far.
        // Note the Path can be empty (isEmpty() == true) and still have a current point.
        bool hasCurrentPoint() const;

        void moveTo(const FloatPoint&);
        void addLineTo(const FloatPoint&);
        void addQuadCurveTo(const FloatPoint& controlPoint, const FloatPoint& endPoint);
        void addBezierCurveTo(const FloatPoint& controlPoint1, const FloatPoint& controlPoint2, const FloatPoint& endPoint);
        void addArcTo(const FloatPoint&, const FloatPoint&, float radius);
        void closeSubpath();

        void addArc(const FloatPoint&, float radius, float startAngle, float endAngle, bool anticlockwise);
        void addRect(const FloatRect&);
        void addEllipse(const FloatRect&);

        void translate(const FloatSize&);

        String debugString() const;

        PlatformPath* platformPath() const { return m_path; }

        static Path createRoundedRectangle(const FloatRect&, const FloatSize& roundingRadii);
        static Path createRoundedRectangle(const FloatRect&, const FloatSize& topLeftRadius, const FloatSize& topRightRadius, const FloatSize& bottomLeftRadius, const FloatSize& bottomRightRadius);
        static Path createRectangle(const FloatRect&);
        static Path createEllipse(const FloatPoint& center, float rx, float ry);
        static Path createCircle(const FloatPoint& center, float r);
        static Path createLine(const FloatPoint&, const FloatPoint&);

        void apply(void* info, PathApplierFunction) const;
        void transform(const TransformationMatrix&);

    private:
        PlatformPath* m_path;
    };

}

#endif