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1 | /* |
2 | * Copyright (C) 2011-2013 Intel Corporation | |
3 | * | |
4 | * Permission is hereby granted, free of charge, to any person obtaining a | |
5 | * copy of this software and associated documentation files (the "Software"), | |
6 | * to deal in the Software without restriction, including without limitation | |
7 | * the rights to use, copy, modify, merge, publish, distribute, sublicense, | |
8 | * and/or sell copies of the Software, and to permit persons to whom the | |
9 | * Software is furnished to do so, subject to the following conditions: | |
10 | * | |
11 | * The above copyright notice and this permission notice (including the next | |
12 | * paragraph) shall be included in all copies or substantial portions of the | |
13 | * Software. | |
14 | * | |
15 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR | |
16 | * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, | |
17 | * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL | |
18 | * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER | |
19 | * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, | |
20 | * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE | |
21 | * SOFTWARE. | |
22 | */ | |
23 | ||
24 | #ifndef DRM_RECT_H | |
25 | #define DRM_RECT_H | |
26 | ||
27 | /** | |
28 | * drm_rect - two dimensional rectangle | |
29 | * @x1: horizontal starting coordinate (inclusive) | |
30 | * @x2: horizontal ending coordinate (exclusive) | |
31 | * @y1: vertical starting coordinate (inclusive) | |
32 | * @y2: vertical ending coordinate (exclusive) | |
33 | */ | |
34 | struct drm_rect { | |
35 | int x1, y1, x2, y2; | |
36 | }; | |
37 | ||
38 | /** | |
39 | * drm_rect_adjust_size - adjust the size of the rectangle | |
40 | * @r: rectangle to be adjusted | |
41 | * @dw: horizontal adjustment | |
42 | * @dh: vertical adjustment | |
43 | * | |
44 | * Change the size of rectangle @r by @dw in the horizontal direction, | |
45 | * and by @dh in the vertical direction, while keeping the center | |
46 | * of @r stationary. | |
47 | * | |
48 | * Positive @dw and @dh increase the size, negative values decrease it. | |
49 | */ | |
50 | static inline void drm_rect_adjust_size(struct drm_rect *r, int dw, int dh) | |
51 | { | |
52 | r->x1 -= dw >> 1; | |
53 | r->y1 -= dh >> 1; | |
54 | r->x2 += (dw + 1) >> 1; | |
55 | r->y2 += (dh + 1) >> 1; | |
56 | } | |
57 | ||
58 | /** | |
59 | * drm_rect_translate - translate the rectangle | |
60 | * @r: rectangle to be tranlated | |
61 | * @dx: horizontal translation | |
62 | * @dy: vertical translation | |
63 | * | |
64 | * Move rectangle @r by @dx in the horizontal direction, | |
65 | * and by @dy in the vertical direction. | |
66 | */ | |
67 | static inline void drm_rect_translate(struct drm_rect *r, int dx, int dy) | |
68 | { | |
69 | r->x1 += dx; | |
70 | r->y1 += dy; | |
71 | r->x2 += dx; | |
72 | r->y2 += dy; | |
73 | } | |
74 | ||
75 | /** | |
76 | * drm_rect_downscale - downscale a rectangle | |
77 | * @r: rectangle to be downscaled | |
78 | * @horz: horizontal downscale factor | |
79 | * @vert: vertical downscale factor | |
80 | * | |
81 | * Divide the coordinates of rectangle @r by @horz and @vert. | |
82 | */ | |
83 | static inline void drm_rect_downscale(struct drm_rect *r, int horz, int vert) | |
84 | { | |
85 | r->x1 /= horz; | |
86 | r->y1 /= vert; | |
87 | r->x2 /= horz; | |
88 | r->y2 /= vert; | |
89 | } | |
90 | ||
91 | /** | |
92 | * drm_rect_width - determine the rectangle width | |
93 | * @r: rectangle whose width is returned | |
94 | * | |
95 | * RETURNS: | |
96 | * The width of the rectangle. | |
97 | */ | |
98 | static inline int drm_rect_width(const struct drm_rect *r) | |
99 | { | |
100 | return r->x2 - r->x1; | |
101 | } | |
102 | ||
103 | /** | |
104 | * drm_rect_height - determine the rectangle height | |
105 | * @r: rectangle whose height is returned | |
106 | * | |
107 | * RETURNS: | |
108 | * The height of the rectangle. | |
109 | */ | |
110 | static inline int drm_rect_height(const struct drm_rect *r) | |
111 | { | |
112 | return r->y2 - r->y1; | |
113 | } | |
114 | ||
115 | /** | |
116 | * drm_rect_visible - determine if the the rectangle is visible | |
117 | * @r: rectangle whose visibility is returned | |
118 | * | |
119 | * RETURNS: | |
120 | * %true if the rectangle is visible, %false otherwise. | |
121 | */ | |
122 | static inline bool drm_rect_visible(const struct drm_rect *r) | |
123 | { | |
124 | return drm_rect_width(r) > 0 && drm_rect_height(r) > 0; | |
125 | } | |
126 | ||
0894c96b VS |
127 | /** |
128 | * drm_rect_equals - determine if two rectangles are equal | |
129 | * @r1: first rectangle | |
130 | * @r2: second rectangle | |
131 | * | |
132 | * RETURNS: | |
133 | * %true if the rectangles are equal, %false otherwise. | |
134 | */ | |
135 | static inline bool drm_rect_equals(const struct drm_rect *r1, | |
136 | const struct drm_rect *r2) | |
137 | { | |
138 | return r1->x1 == r2->x1 && r1->x2 == r2->x2 && | |
139 | r1->y1 == r2->y1 && r1->y2 == r2->y2; | |
140 | } | |
141 | ||
3512f976 VS |
142 | bool drm_rect_intersect(struct drm_rect *r, const struct drm_rect *clip); |
143 | bool drm_rect_clip_scaled(struct drm_rect *src, struct drm_rect *dst, | |
144 | const struct drm_rect *clip, | |
145 | int hscale, int vscale); | |
4954c428 VS |
146 | int drm_rect_calc_hscale(const struct drm_rect *src, |
147 | const struct drm_rect *dst, | |
148 | int min_hscale, int max_hscale); | |
149 | int drm_rect_calc_vscale(const struct drm_rect *src, | |
150 | const struct drm_rect *dst, | |
151 | int min_vscale, int max_vscale); | |
152 | int drm_rect_calc_hscale_relaxed(struct drm_rect *src, | |
153 | struct drm_rect *dst, | |
154 | int min_hscale, int max_hscale); | |
155 | int drm_rect_calc_vscale_relaxed(struct drm_rect *src, | |
156 | struct drm_rect *dst, | |
157 | int min_vscale, int max_vscale); | |
e7272df3 | 158 | void drm_rect_debug_print(const struct drm_rect *r, bool fixed_point); |
3512f976 VS |
159 | |
160 | #endif |