1/*
2 * Copyright (C) 2004, 2005, 2006 Apple Computer, Inc.  All rights reserved.
3 * Copyright (C) 2013 Google Inc. All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright
9 *    notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 *    notice, this list of conditions and the following disclaimer in the
12 *    documentation and/or other materials provided with the distribution.
13 *
14 * THIS SOFTWARE IS PROVIDED BY APPLE COMPUTER, INC. ``AS IS'' AND ANY
15 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
17 * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL APPLE COMPUTER, INC. OR
18 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
19 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
20 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
21 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
22 * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
23 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
24 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
25 */
26
27#ifndef IntPoint_h
28#define IntPoint_h
29
30#include "core/platform/graphics/IntSize.h"
31#include "wtf/MathExtras.h"
32#include "wtf/Platform.h"
33
34#if OS(DARWIN)
35typedef struct CGPoint CGPoint;
36#ifdef NSGEOMETRY_TYPES_SAME_AS_CGGEOMETRY_TYPES
37typedef struct CGPoint NSPoint;
38#else
39typedef struct _NSPoint NSPoint;
40#endif
41#endif
42
43namespace WebCore {
44
45class IntPoint {
46public:
47    IntPoint() : m_x(0), m_y(0) { }
48    IntPoint(int x, int y) : m_x(x), m_y(y) { }
49    explicit IntPoint(const IntSize& size) : m_x(size.width()), m_y(size.height()) { }
50
51    static IntPoint zero() { return IntPoint(); }
52
53    int x() const { return m_x; }
54    int y() const { return m_y; }
55
56    void setX(int x) { m_x = x; }
57    void setY(int y) { m_y = y; }
58
59    void move(const IntSize& s) { move(s.width(), s.height()); }
60    void moveBy(const IntPoint& offset) { move(offset.x(), offset.y()); }
61    void move(int dx, int dy) { m_x += dx; m_y += dy; }
62    void scale(float sx, float sy)
63    {
64        m_x = lroundf(static_cast<float>(m_x * sx));
65        m_y = lroundf(static_cast<float>(m_y * sy));
66    }
67
68    IntPoint expandedTo(const IntPoint& other) const
69    {
70        return IntPoint(m_x > other.m_x ? m_x : other.m_x,
71            m_y > other.m_y ? m_y : other.m_y);
72    }
73
74    IntPoint shrunkTo(const IntPoint& other) const
75    {
76        return IntPoint(m_x < other.m_x ? m_x : other.m_x,
77            m_y < other.m_y ? m_y : other.m_y);
78    }
79
80    int distanceSquaredToPoint(const IntPoint&) const;
81
82    void clampNegativeToZero()
83    {
84        *this = expandedTo(zero());
85    }
86
87    IntPoint transposedPoint() const
88    {
89        return IntPoint(m_y, m_x);
90    }
91
92#if OS(DARWIN)
93    explicit IntPoint(const CGPoint&); // don't do this implicitly since it's lossy
94    operator CGPoint() const;
95
96#if !defined(NSGEOMETRY_TYPES_SAME_AS_CGGEOMETRY_TYPES)
97    explicit IntPoint(const NSPoint&); // don't do this implicitly since it's lossy
98    operator NSPoint() const;
99#endif
100#endif
101
102private:
103    int m_x, m_y;
104};
105
106inline IntPoint& operator+=(IntPoint& a, const IntSize& b)
107{
108    a.move(b.width(), b.height());
109    return a;
110}
111
112inline IntPoint& operator-=(IntPoint& a, const IntSize& b)
113{
114    a.move(-b.width(), -b.height());
115    return a;
116}
117
118inline IntPoint operator+(const IntPoint& a, const IntSize& b)
119{
120    return IntPoint(a.x() + b.width(), a.y() + b.height());
121}
122
123inline IntPoint operator+(const IntPoint& a, const IntPoint& b)
124{
125    return IntPoint(a.x() + b.x(), a.y() + b.y());
126}
127
128inline IntSize operator-(const IntPoint& a, const IntPoint& b)
129{
130    return IntSize(a.x() - b.x(), a.y() - b.y());
131}
132
133inline IntPoint operator-(const IntPoint& a, const IntSize& b)
134{
135    return IntPoint(a.x() - b.width(), a.y() - b.height());
136}
137
138inline IntPoint operator-(const IntPoint& point)
139{
140    return IntPoint(-point.x(), -point.y());
141}
142
143inline bool operator==(const IntPoint& a, const IntPoint& b)
144{
145    return a.x() == b.x() && a.y() == b.y();
146}
147
148inline bool operator!=(const IntPoint& a, const IntPoint& b)
149{
150    return a.x() != b.x() || a.y() != b.y();
151}
152
153inline IntSize toIntSize(const IntPoint& a)
154{
155    return IntSize(a.x(), a.y());
156}
157
158inline int IntPoint::distanceSquaredToPoint(const IntPoint& point) const
159{
160    return ((*this) - point).diagonalLengthSquared();
161}
162
163} // namespace WebCore
164
165#endif // IntPoint_h
166