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
155
156
157
158
159
160
161
162
163
164
165
166
167
|
/*
* Copyright (C) 2011-2013 Intel Corporation
*
* Permission is hereby granted, free of charge, to any person obtaining a
* copy of this software and associated documentation files (the "Software"),
* to deal in the Software without restriction, including without limitation
* the rights to use, copy, modify, merge, publish, distribute, sublicense,
* and/or sell copies of the Software, and to permit persons to whom the
* Software is furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice (including the next
* paragraph) shall be included in all copies or substantial portions of the
* Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
* SOFTWARE.
*/
#ifndef DRM_RECT_H
#define DRM_RECT_H
/**
* DOC: rect utils
*
* Utility functions to help manage rectangular areas for
* clipping, scaling, etc. calculations.
*/
/**
* struct drm_rect - two dimensional rectangle
* @x1: horizontal starting coordinate (inclusive)
* @x2: horizontal ending coordinate (exclusive)
* @y1: vertical starting coordinate (inclusive)
* @y2: vertical ending coordinate (exclusive)
*/
struct drm_rect {
int x1, y1, x2, y2;
};
/**
* drm_rect_adjust_size - adjust the size of the rectangle
* @r: rectangle to be adjusted
* @dw: horizontal adjustment
* @dh: vertical adjustment
*
* Change the size of rectangle @r by @dw in the horizontal direction,
* and by @dh in the vertical direction, while keeping the center
* of @r stationary.
*
* Positive @dw and @dh increase the size, negative values decrease it.
*/
static inline void drm_rect_adjust_size(struct drm_rect *r, int dw, int dh)
{
r->x1 -= dw >> 1;
r->y1 -= dh >> 1;
r->x2 += (dw + 1) >> 1;
r->y2 += (dh + 1) >> 1;
}
/**
* drm_rect_translate - translate the rectangle
* @r: rectangle to be tranlated
* @dx: horizontal translation
* @dy: vertical translation
*
* Move rectangle @r by @dx in the horizontal direction,
* and by @dy in the vertical direction.
*/
static inline void drm_rect_translate(struct drm_rect *r, int dx, int dy)
{
r->x1 += dx;
r->y1 += dy;
r->x2 += dx;
r->y2 += dy;
}
/**
* drm_rect_downscale - downscale a rectangle
* @r: rectangle to be downscaled
* @horz: horizontal downscale factor
* @vert: vertical downscale factor
*
* Divide the coordinates of rectangle @r by @horz and @vert.
*/
static inline void drm_rect_downscale(struct drm_rect *r, int horz, int vert)
{
r->x1 /= horz;
r->y1 /= vert;
r->x2 /= horz;
r->y2 /= vert;
}
/**
* drm_rect_width - determine the rectangle width
* @r: rectangle whose width is returned
*
* RETURNS:
* The width of the rectangle.
*/
static inline int drm_rect_width(const struct drm_rect *r)
{
return r->x2 - r->x1;
}
/**
* drm_rect_height - determine the rectangle height
* @r: rectangle whose height is returned
*
* RETURNS:
* The height of the rectangle.
*/
static inline int drm_rect_height(const struct drm_rect *r)
{
return r->y2 - r->y1;
}
/**
* drm_rect_visible - determine if the the rectangle is visible
* @r: rectangle whose visibility is returned
*
* RETURNS:
* %true if the rectangle is visible, %false otherwise.
*/
static inline bool drm_rect_visible(const struct drm_rect *r)
{
return drm_rect_width(r) > 0 && drm_rect_height(r) > 0;
}
/**
* drm_rect_equals - determine if two rectangles are equal
* @r1: first rectangle
* @r2: second rectangle
*
* RETURNS:
* %true if the rectangles are equal, %false otherwise.
*/
static inline bool drm_rect_equals(const struct drm_rect *r1,
const struct drm_rect *r2)
{
return r1->x1 == r2->x1 && r1->x2 == r2->x2 &&
r1->y1 == r2->y1 && r1->y2 == r2->y2;
}
bool drm_rect_intersect(struct drm_rect *r, const struct drm_rect *clip);
bool drm_rect_clip_scaled(struct drm_rect *src, struct drm_rect *dst,
const struct drm_rect *clip,
int hscale, int vscale);
int drm_rect_calc_hscale(const struct drm_rect *src,
const struct drm_rect *dst,
int min_hscale, int max_hscale);
int drm_rect_calc_vscale(const struct drm_rect *src,
const struct drm_rect *dst,
int min_vscale, int max_vscale);
int drm_rect_calc_hscale_relaxed(struct drm_rect *src,
struct drm_rect *dst,
int min_hscale, int max_hscale);
int drm_rect_calc_vscale_relaxed(struct drm_rect *src,
struct drm_rect *dst,
int min_vscale, int max_vscale);
void drm_rect_debug_print(const struct drm_rect *r, bool fixed_point);
#endif
|
