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
|
/*
* Copyright (C) 2013 Adobe Systems Incorporated. All rights reserved.
*
* 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 THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "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 THE
* COPYRIGHT HOLDER 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.
*/
#include "config.h"
#include "FloatRoundedRect.h"
#include <algorithm>
namespace WebCore {
FloatRoundedRect::FloatRoundedRect(float x, float y, float width, float height)
: m_rect(x, y, width, height)
{
}
FloatRoundedRect::FloatRoundedRect(const FloatRect& rect, const Radii& radii)
: m_rect(rect)
, m_radii(radii)
{
}
FloatRoundedRect::FloatRoundedRect(const FloatRect& rect, const FloatSize& topLeft, const FloatSize& topRight, const FloatSize& bottomLeft, const FloatSize& bottomRight)
: m_rect(rect)
, m_radii(topLeft, topRight, bottomLeft, bottomRight)
{
}
bool FloatRoundedRect::Radii::isZero() const
{
return m_topLeft.isZero() && m_topRight.isZero() && m_bottomLeft.isZero() && m_bottomRight.isZero();
}
void FloatRoundedRect::Radii::scale(float factor)
{
if (factor == 1)
return;
// If either radius on a corner becomes zero, reset both radii on that corner.
m_topLeft.scale(factor);
if (!m_topLeft.width() || !m_topLeft.height())
m_topLeft = FloatSize();
m_topRight.scale(factor);
if (!m_topRight.width() || !m_topRight.height())
m_topRight = FloatSize();
m_bottomLeft.scale(factor);
if (!m_bottomLeft.width() || !m_bottomLeft.height())
m_bottomLeft = FloatSize();
m_bottomRight.scale(factor);
if (!m_bottomRight.width() || !m_bottomRight.height())
m_bottomRight = FloatSize();
}
void FloatRoundedRect::Radii::expand(float topWidth, float bottomWidth, float leftWidth, float rightWidth)
{
if (m_topLeft.width() > 0 && m_topLeft.height() > 0) {
m_topLeft.setWidth(std::max<float>(0, m_topLeft.width() + leftWidth));
m_topLeft.setHeight(std::max<float>(0, m_topLeft.height() + topWidth));
}
if (m_topRight.width() > 0 && m_topRight.height() > 0) {
m_topRight.setWidth(std::max<float>(0, m_topRight.width() + rightWidth));
m_topRight.setHeight(std::max<float>(0, m_topRight.height() + topWidth));
}
if (m_bottomLeft.width() > 0 && m_bottomLeft.height() > 0) {
m_bottomLeft.setWidth(std::max<float>(0, m_bottomLeft.width() + leftWidth));
m_bottomLeft.setHeight(std::max<float>(0, m_bottomLeft.height() + bottomWidth));
}
if (m_bottomRight.width() > 0 && m_bottomRight.height() > 0) {
m_bottomRight.setWidth(std::max<float>(0, m_bottomRight.width() + rightWidth));
m_bottomRight.setHeight(std::max<float>(0, m_bottomRight.height() + bottomWidth));
}
}
static inline float cornerRectIntercept(float y, const FloatRect& cornerRect)
{
ASSERT(cornerRect.height() > 0);
return cornerRect.width() * sqrt(1 - (y * y) / (cornerRect.height() * cornerRect.height()));
}
bool FloatRoundedRect::xInterceptsAtY(float y, float& minXIntercept, float& maxXIntercept) const
{
if (y < rect().y() || y > rect().maxY())
return false;
if (!isRounded()) {
minXIntercept = rect().x();
maxXIntercept = rect().maxX();
return true;
}
const FloatRect& topLeftRect = topLeftCorner();
const FloatRect& bottomLeftRect = bottomLeftCorner();
if (!topLeftRect.isEmpty() && y >= topLeftRect.y() && y < topLeftRect.maxY())
minXIntercept = topLeftRect.maxX() - cornerRectIntercept(topLeftRect.maxY() - y, topLeftRect);
else if (!bottomLeftRect.isEmpty() && y >= bottomLeftRect.y() && y <= bottomLeftRect.maxY())
minXIntercept = bottomLeftRect.maxX() - cornerRectIntercept(y - bottomLeftRect.y(), bottomLeftRect);
else
minXIntercept = m_rect.x();
const FloatRect& topRightRect = topRightCorner();
const FloatRect& bottomRightRect = bottomRightCorner();
if (!topRightRect.isEmpty() && y >= topRightRect.y() && y <= topRightRect.maxY())
maxXIntercept = topRightRect.x() + cornerRectIntercept(topRightRect.maxY() - y, topRightRect);
else if (!bottomRightRect.isEmpty() && y >= bottomRightRect.y() && y <= bottomRightRect.maxY())
maxXIntercept = bottomRightRect.x() + cornerRectIntercept(y - bottomRightRect.y(), bottomRightRect);
else
maxXIntercept = m_rect.maxX();
return true;
}
} // namespace WebCore
|
