1 /*
2 * Copyright (C) 2003, 2006, 2007 Apple Inc. All rights reserved.
3 * Copyright (C) 2005 Nokia. 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 #include "FloatRect.h"
28
29 #include "FloatConversion.h"
30 #include <algorithm>
31
32 using std::max;
33 using std::min;
34
35 namespace WebCore
36 {
37
FloatRect(const IntRect & r)38 FloatRect::FloatRect(const IntRect &r) : m_location(r.location()), m_size(r.size())
39 {
40 }
41
narrowPrecision(double x,double y,double width,double height)42 FloatRect FloatRect::narrowPrecision(double x, double y, double width, double height)
43 {
44 return FloatRect(narrowPrecisionToFloat(x), narrowPrecisionToFloat(y), narrowPrecisionToFloat(width), narrowPrecisionToFloat(height));
45 }
46
intersects(const FloatRect & other) const47 bool FloatRect::intersects(const FloatRect &other) const
48 {
49 // Checking emptiness handles negative widths as well as zero.
50 return !isEmpty() && !other.isEmpty()
51 && x() < other.right() && other.x() < right()
52 && y() < other.bottom() && other.y() < bottom();
53 }
54
contains(const FloatRect & other) const55 bool FloatRect::contains(const FloatRect &other) const
56 {
57 return x() <= other.x() && right() >= other.right()
58 && y() <= other.y() && bottom() >= other.bottom();
59 }
60
intersect(const FloatRect & other)61 void FloatRect::intersect(const FloatRect &other)
62 {
63 float l = max(x(), other.x());
64 float t = max(y(), other.y());
65 float r = min(right(), other.right());
66 float b = min(bottom(), other.bottom());
67
68 // Return a clean empty rectangle for non-intersecting cases.
69 if (l >= r || t >= b) {
70 l = 0;
71 t = 0;
72 r = 0;
73 b = 0;
74 }
75
76 m_location.setX(l);
77 m_location.setY(t);
78 m_size.setWidth(r - l);
79 m_size.setHeight(b - t);
80 }
81
unite(const FloatRect & other)82 void FloatRect::unite(const FloatRect &other)
83 {
84 // Handle empty special cases first.
85 if (other.isEmpty()) {
86 return;
87 }
88 if (isEmpty()) {
89 *this = other;
90 return;
91 }
92
93 float l = min(x(), other.x());
94 float t = min(y(), other.y());
95 float r = max(right(), other.right());
96 float b = max(bottom(), other.bottom());
97
98 m_location.setX(l);
99 m_location.setY(t);
100 m_size.setWidth(r - l);
101 m_size.setHeight(b - t);
102 }
103
scale(float s)104 void FloatRect::scale(float s)
105 {
106 m_location.setX(x() * s);
107 m_location.setY(y() * s);
108 m_size.setWidth(width() * s);
109 m_size.setHeight(height() * s);
110 }
111
enclosingIntRect(const FloatRect & rect)112 IntRect enclosingIntRect(const FloatRect &rect)
113 {
114 int l = static_cast<int>(rect.x());
115 int t = static_cast<int>(rect.y());
116 // FIXME: These two need to be a "ceiling" operation, not rounding.
117 // We changed them to do "+ 0.5f" to compile on Win32 where there's
118 // no ceilf, but they should be changed back to "ceiling" at some point
119 // and we should provide an implementation of ceilf for Win32.
120 int r = static_cast<int>(rect.right() + 0.5f);
121 int b = static_cast<int>(rect.bottom() + 0.5f);
122 return IntRect(l, t, r - l, b - t);
123 }
124
125 }
126