Line data Source code
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 : #include <linux/types.h>
28 :
29 : /**
30 : * DOC: rect utils
31 : *
32 : * Utility functions to help manage rectangular areas for
33 : * clipping, scaling, etc. calculations.
34 : */
35 :
36 : /**
37 : * struct drm_rect - two dimensional rectangle
38 : * @x1: horizontal starting coordinate (inclusive)
39 : * @x2: horizontal ending coordinate (exclusive)
40 : * @y1: vertical starting coordinate (inclusive)
41 : * @y2: vertical ending coordinate (exclusive)
42 : *
43 : * Note that this must match the layout of struct drm_mode_rect or the damage
44 : * helpers like drm_atomic_helper_damage_iter_init() break.
45 : */
46 : struct drm_rect {
47 : int x1, y1, x2, y2;
48 : };
49 :
50 : /**
51 : * DRM_RECT_INIT - initialize a rectangle from x/y/w/h
52 : * @x: x coordinate
53 : * @y: y coordinate
54 : * @w: width
55 : * @h: height
56 : *
57 : * RETURNS:
58 : * A new rectangle of the specified size.
59 : */
60 : #define DRM_RECT_INIT(x, y, w, h) ((struct drm_rect){ \
61 : .x1 = (x), \
62 : .y1 = (y), \
63 : .x2 = (x) + (w), \
64 : .y2 = (y) + (h) })
65 :
66 : /**
67 : * DRM_RECT_FMT - printf string for &struct drm_rect
68 : */
69 : #define DRM_RECT_FMT "%dx%d%+d%+d"
70 : /**
71 : * DRM_RECT_ARG - printf arguments for &struct drm_rect
72 : * @r: rectangle struct
73 : */
74 : #define DRM_RECT_ARG(r) drm_rect_width(r), drm_rect_height(r), (r)->x1, (r)->y1
75 :
76 : /**
77 : * DRM_RECT_FP_FMT - printf string for &struct drm_rect in 16.16 fixed point
78 : */
79 : #define DRM_RECT_FP_FMT "%d.%06ux%d.%06u%+d.%06u%+d.%06u"
80 : /**
81 : * DRM_RECT_FP_ARG - printf arguments for &struct drm_rect in 16.16 fixed point
82 : * @r: rectangle struct
83 : *
84 : * This is useful for e.g. printing plane source rectangles, which are in 16.16
85 : * fixed point.
86 : */
87 : #define DRM_RECT_FP_ARG(r) \
88 : drm_rect_width(r) >> 16, ((drm_rect_width(r) & 0xffff) * 15625) >> 10, \
89 : drm_rect_height(r) >> 16, ((drm_rect_height(r) & 0xffff) * 15625) >> 10, \
90 : (r)->x1 >> 16, (((r)->x1 & 0xffff) * 15625) >> 10, \
91 : (r)->y1 >> 16, (((r)->y1 & 0xffff) * 15625) >> 10
92 :
93 : /**
94 : * drm_rect_init - initialize the rectangle from x/y/w/h
95 : * @r: rectangle
96 : * @x: x coordinate
97 : * @y: y coordinate
98 : * @width: width
99 : * @height: height
100 : */
101 : static inline void drm_rect_init(struct drm_rect *r, int x, int y,
102 : int width, int height)
103 : {
104 0 : r->x1 = x;
105 0 : r->y1 = y;
106 0 : r->x2 = x + width;
107 0 : r->y2 = y + height;
108 : }
109 :
110 : /**
111 : * drm_rect_adjust_size - adjust the size of the rectangle
112 : * @r: rectangle to be adjusted
113 : * @dw: horizontal adjustment
114 : * @dh: vertical adjustment
115 : *
116 : * Change the size of rectangle @r by @dw in the horizontal direction,
117 : * and by @dh in the vertical direction, while keeping the center
118 : * of @r stationary.
119 : *
120 : * Positive @dw and @dh increase the size, negative values decrease it.
121 : */
122 : static inline void drm_rect_adjust_size(struct drm_rect *r, int dw, int dh)
123 : {
124 : r->x1 -= dw >> 1;
125 : r->y1 -= dh >> 1;
126 : r->x2 += (dw + 1) >> 1;
127 : r->y2 += (dh + 1) >> 1;
128 : }
129 :
130 : /**
131 : * drm_rect_translate - translate the rectangle
132 : * @r: rectangle to be tranlated
133 : * @dx: horizontal translation
134 : * @dy: vertical translation
135 : *
136 : * Move rectangle @r by @dx in the horizontal direction,
137 : * and by @dy in the vertical direction.
138 : */
139 : static inline void drm_rect_translate(struct drm_rect *r, int dx, int dy)
140 : {
141 : r->x1 += dx;
142 : r->y1 += dy;
143 : r->x2 += dx;
144 : r->y2 += dy;
145 : }
146 :
147 : /**
148 : * drm_rect_translate_to - translate the rectangle to an absolute position
149 : * @r: rectangle to be tranlated
150 : * @x: horizontal position
151 : * @y: vertical position
152 : *
153 : * Move rectangle @r to @x in the horizontal direction,
154 : * and to @y in the vertical direction.
155 : */
156 : static inline void drm_rect_translate_to(struct drm_rect *r, int x, int y)
157 : {
158 : drm_rect_translate(r, x - r->x1, y - r->y1);
159 : }
160 :
161 : /**
162 : * drm_rect_downscale - downscale a rectangle
163 : * @r: rectangle to be downscaled
164 : * @horz: horizontal downscale factor
165 : * @vert: vertical downscale factor
166 : *
167 : * Divide the coordinates of rectangle @r by @horz and @vert.
168 : */
169 : static inline void drm_rect_downscale(struct drm_rect *r, int horz, int vert)
170 : {
171 : r->x1 /= horz;
172 : r->y1 /= vert;
173 : r->x2 /= horz;
174 : r->y2 /= vert;
175 : }
176 :
177 : /**
178 : * drm_rect_width - determine the rectangle width
179 : * @r: rectangle whose width is returned
180 : *
181 : * RETURNS:
182 : * The width of the rectangle.
183 : */
184 : static inline int drm_rect_width(const struct drm_rect *r)
185 : {
186 291 : return r->x2 - r->x1;
187 : }
188 :
189 : /**
190 : * drm_rect_height - determine the rectangle height
191 : * @r: rectangle whose height is returned
192 : *
193 : * RETURNS:
194 : * The height of the rectangle.
195 : */
196 : static inline int drm_rect_height(const struct drm_rect *r)
197 : {
198 208 : return r->y2 - r->y1;
199 : }
200 :
201 : /**
202 : * drm_rect_visible - determine if the rectangle is visible
203 : * @r: rectangle whose visibility is returned
204 : *
205 : * RETURNS:
206 : * %true if the rectangle is visible, %false otherwise.
207 : */
208 : static inline bool drm_rect_visible(const struct drm_rect *r)
209 : {
210 0 : return drm_rect_width(r) > 0 && drm_rect_height(r) > 0;
211 : }
212 :
213 : /**
214 : * drm_rect_equals - determine if two rectangles are equal
215 : * @r1: first rectangle
216 : * @r2: second rectangle
217 : *
218 : * RETURNS:
219 : * %true if the rectangles are equal, %false otherwise.
220 : */
221 : static inline bool drm_rect_equals(const struct drm_rect *r1,
222 : const struct drm_rect *r2)
223 : {
224 0 : return r1->x1 == r2->x1 && r1->x2 == r2->x2 &&
225 0 : r1->y1 == r2->y1 && r1->y2 == r2->y2;
226 : }
227 :
228 : /**
229 : * drm_rect_fp_to_int - Convert a rect in 16.16 fixed point form to int form.
230 : * @dst: rect to be stored the converted value
231 : * @src: rect in 16.16 fixed point form
232 : */
233 : static inline void drm_rect_fp_to_int(struct drm_rect *dst,
234 : const struct drm_rect *src)
235 : {
236 : drm_rect_init(dst, src->x1 >> 16, src->y1 >> 16,
237 : drm_rect_width(src) >> 16,
238 : drm_rect_height(src) >> 16);
239 : }
240 :
241 : bool drm_rect_intersect(struct drm_rect *r, const struct drm_rect *clip);
242 : bool drm_rect_clip_scaled(struct drm_rect *src, struct drm_rect *dst,
243 : const struct drm_rect *clip);
244 : int drm_rect_calc_hscale(const struct drm_rect *src,
245 : const struct drm_rect *dst,
246 : int min_hscale, int max_hscale);
247 : int drm_rect_calc_vscale(const struct drm_rect *src,
248 : const struct drm_rect *dst,
249 : int min_vscale, int max_vscale);
250 : void drm_rect_debug_print(const char *prefix,
251 : const struct drm_rect *r, bool fixed_point);
252 : void drm_rect_rotate(struct drm_rect *r,
253 : int width, int height,
254 : unsigned int rotation);
255 : void drm_rect_rotate_inv(struct drm_rect *r,
256 : int width, int height,
257 : unsigned int rotation);
258 :
259 : #endif
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