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
|
/* SPDX-License-Identifier: GPL-2.0-or-later
* Copyright 2001-2002 NaN Holding BV. All rights reserved. */
/** \file
* \ingroup GHOST
*/
#include "GHOST_Rect.h"
void GHOST_Rect::inset(int32_t i)
{
if (i > 0) {
/* Grow the rectangle. */
m_l -= i;
m_r += i;
m_t -= i;
m_b += i;
}
else if (i < 0) {
/* Shrink the rectangle, check for insets larger than half the size. */
int32_t i2 = i * 2;
if (getWidth() > i2) {
m_l += i;
m_r -= i;
}
else {
m_l = m_l + ((m_r - m_l) / 2);
m_r = m_l;
}
if (getHeight() > i2) {
m_t += i;
m_b -= i;
}
else {
m_t = m_t + ((m_b - m_t) / 2);
m_b = m_t;
}
}
}
GHOST_TVisibility GHOST_Rect::getVisibility(GHOST_Rect &r) const
{
bool lt = isInside(r.m_l, r.m_t);
bool rt = isInside(r.m_r, r.m_t);
bool lb = isInside(r.m_l, r.m_b);
bool rb = isInside(r.m_r, r.m_b);
GHOST_TVisibility v;
if (lt && rt && lb && rb) {
/* All points inside, rectangle is inside this. */
v = GHOST_kFullyVisible;
}
else if (!(lt || rt || lb || rb)) {
/* None of the points inside.
* Check to see whether the rectangle is larger than this one. */
if ((r.m_l < m_l) && (r.m_t < m_t) && (r.m_r > m_r) && (r.m_b > m_b)) {
v = GHOST_kPartiallyVisible;
}
else {
v = GHOST_kNotVisible;
}
}
else {
/* Some of the points inside, rectangle is partially inside. */
v = GHOST_kPartiallyVisible;
}
return v;
}
void GHOST_Rect::setCenter(int32_t cx, int32_t cy)
{
int32_t offset = cx - (m_l + (m_r - m_l) / 2);
m_l += offset;
m_r += offset;
offset = cy - (m_t + (m_b - m_t) / 2);
m_t += offset;
m_b += offset;
}
void GHOST_Rect::setCenter(int32_t cx, int32_t cy, int32_t w, int32_t h)
{
long w_2, h_2;
w_2 = w >> 1;
h_2 = h >> 1;
m_l = cx - w_2;
m_t = cy - h_2;
m_r = m_l + w;
m_b = m_t + h;
}
bool GHOST_Rect::clip(GHOST_Rect &r) const
{
bool clipped = false;
if (r.m_l < m_l) {
r.m_l = m_l;
clipped = true;
}
if (r.m_t < m_t) {
r.m_t = m_t;
clipped = true;
}
if (r.m_r > m_r) {
r.m_r = m_r;
clipped = true;
}
if (r.m_b > m_b) {
r.m_b = m_b;
clipped = true;
}
return clipped;
}
|