1 /**
2 * @file lv_area.h
3 *
4 */
5
6 #ifndef LV_AREA_H
7 #define LV_AREA_H
8
9 #ifdef __cplusplus
10 extern "C" {
11 #endif
12
13 /*********************
14 * INCLUDES
15 *********************/
16 #include "../lv_conf_internal.h"
17 #include <stdbool.h>
18 #include <stdint.h>
19
20 /*********************
21 * DEFINES
22 *********************/
23
24 #if LV_USE_LARGE_COORD
25 typedef int32_t lv_coord_t;
26 #else
27 typedef int16_t lv_coord_t;
28 #endif
29
30 /**********************
31 * TYPEDEFS
32 **********************/
33
34 /**
35 * Represents a point on the screen.
36 */
37 typedef struct {
38 lv_coord_t x;
39 lv_coord_t y;
40 } lv_point_t;
41
42 /** Represents an area of the screen.*/
43 typedef struct {
44 lv_coord_t x1;
45 lv_coord_t y1;
46 lv_coord_t x2;
47 lv_coord_t y2;
48 } lv_area_t;
49
50 /** Alignments*/
51 enum {
52 LV_ALIGN_DEFAULT = 0,
53 LV_ALIGN_TOP_LEFT,
54 LV_ALIGN_TOP_MID,
55 LV_ALIGN_TOP_RIGHT,
56 LV_ALIGN_BOTTOM_LEFT,
57 LV_ALIGN_BOTTOM_MID,
58 LV_ALIGN_BOTTOM_RIGHT,
59 LV_ALIGN_LEFT_MID,
60 LV_ALIGN_RIGHT_MID,
61 LV_ALIGN_CENTER,
62
63 LV_ALIGN_OUT_TOP_LEFT,
64 LV_ALIGN_OUT_TOP_MID,
65 LV_ALIGN_OUT_TOP_RIGHT,
66 LV_ALIGN_OUT_BOTTOM_LEFT,
67 LV_ALIGN_OUT_BOTTOM_MID,
68 LV_ALIGN_OUT_BOTTOM_RIGHT,
69 LV_ALIGN_OUT_LEFT_TOP,
70 LV_ALIGN_OUT_LEFT_MID,
71 LV_ALIGN_OUT_LEFT_BOTTOM,
72 LV_ALIGN_OUT_RIGHT_TOP,
73 LV_ALIGN_OUT_RIGHT_MID,
74 LV_ALIGN_OUT_RIGHT_BOTTOM,
75 };
76 typedef uint8_t lv_align_t;
77
78 enum {
79 LV_DIR_NONE = 0x00,
80 LV_DIR_LEFT = (1 << 0),
81 LV_DIR_RIGHT = (1 << 1),
82 LV_DIR_TOP = (1 << 2),
83 LV_DIR_BOTTOM = (1 << 3),
84 LV_DIR_HOR = LV_DIR_LEFT | LV_DIR_RIGHT,
85 LV_DIR_VER = LV_DIR_TOP | LV_DIR_BOTTOM,
86 LV_DIR_ALL = LV_DIR_HOR | LV_DIR_VER,
87 };
88
89 typedef uint8_t lv_dir_t;
90
91 /**********************
92 * GLOBAL PROTOTYPES
93 **********************/
94
95 /**
96 * Initialize an area
97 * @param area_p pointer to an area
98 * @param x1 left coordinate of the area
99 * @param y1 top coordinate of the area
100 * @param x2 right coordinate of the area
101 * @param y2 bottom coordinate of the area
102 */
103 void lv_area_set(lv_area_t * area_p, lv_coord_t x1, lv_coord_t y1, lv_coord_t x2, lv_coord_t y2);
104
105 /**
106 * Copy an area
107 * @param dest pointer to the destination area
108 * @param src pointer to the source area
109 */
lv_area_copy(lv_area_t * dest,const lv_area_t * src)110 inline static void lv_area_copy(lv_area_t * dest, const lv_area_t * src)
111 {
112 dest->x1 = src->x1;
113 dest->y1 = src->y1;
114 dest->x2 = src->x2;
115 dest->y2 = src->y2;
116 }
117
118 /**
119 * Get the width of an area
120 * @param area_p pointer to an area
121 * @return the width of the area (if x1 == x2 -> width = 1)
122 */
lv_area_get_width(const lv_area_t * area_p)123 static inline lv_coord_t lv_area_get_width(const lv_area_t * area_p)
124 {
125 return (lv_coord_t)(area_p->x2 - area_p->x1 + 1);
126 }
127
128 /**
129 * Get the height of an area
130 * @param area_p pointer to an area
131 * @return the height of the area (if y1 == y2 -> height = 1)
132 */
lv_area_get_height(const lv_area_t * area_p)133 static inline lv_coord_t lv_area_get_height(const lv_area_t * area_p)
134 {
135 return (lv_coord_t)(area_p->y2 - area_p->y1 + 1);
136 }
137
138 /**
139 * Set the width of an area
140 * @param area_p pointer to an area
141 * @param w the new width of the area (w == 1 makes x1 == x2)
142 */
143 void lv_area_set_width(lv_area_t * area_p, lv_coord_t w);
144
145 /**
146 * Set the height of an area
147 * @param area_p pointer to an area
148 * @param h the new height of the area (h == 1 makes y1 == y2)
149 */
150 void lv_area_set_height(lv_area_t * area_p, lv_coord_t h);
151
152 /**
153 * Set the position of an area (width and height will be kept)
154 * @param area_p pointer to an area
155 * @param x the new x coordinate of the area
156 * @param y the new y coordinate of the area
157 */
158 void _lv_area_set_pos(lv_area_t * area_p, lv_coord_t x, lv_coord_t y);
159
160 /**
161 * Return with area of an area (x * y)
162 * @param area_p pointer to an area
163 * @return size of area
164 */
165 uint32_t lv_area_get_size(const lv_area_t * area_p);
166
167 void lv_area_increase(lv_area_t * area, lv_coord_t w_extra, lv_coord_t h_extra);
168
169 void lv_area_move(lv_area_t * area, lv_coord_t x_ofs, lv_coord_t y_ofs);
170
171 /**
172 * Get the common parts of two areas
173 * @param res_p pointer to an area, the result will be stored her
174 * @param a1_p pointer to the first area
175 * @param a2_p pointer to the second area
176 * @return false: the two area has NO common parts, res_p is invalid
177 */
178 bool _lv_area_intersect(lv_area_t * res_p, const lv_area_t * a1_p, const lv_area_t * a2_p);
179
180 /**
181 * Get resulting sub areas after removing the common parts of two areas from the first area
182 * @param res_p pointer to an array of areas with a count of 4, the resulting areas will be stored here
183 * @param a1_p pointer to the first area
184 * @param a2_p pointer to the second area
185 * @return number of results (max 4) or -1 if no intersect
186 */
187 int8_t _lv_area_diff(lv_area_t * res_p, const lv_area_t * a1_p, const lv_area_t * a2_p);
188
189 /**
190 * Join two areas into a third which involves the other two
191 * @param res_p pointer to an area, the result will be stored here
192 * @param a1_p pointer to the first area
193 * @param a2_p pointer to the second area
194 */
195 void _lv_area_join(lv_area_t * a_res_p, const lv_area_t * a1_p, const lv_area_t * a2_p);
196
197 /**
198 * Check if a point is on an area
199 * @param a_p pointer to an area
200 * @param p_p pointer to a point
201 * @param radius radius of area (e.g. for rounded rectangle)
202 * @return false:the point is out of the area
203 */
204 bool _lv_area_is_point_on(const lv_area_t * a_p, const lv_point_t * p_p, lv_coord_t radius);
205
206 /**
207 * Check if two area has common parts
208 * @param a1_p pointer to an area.
209 * @param a2_p pointer to an other area
210 * @return false: a1_p and a2_p has no common parts
211 */
212 bool _lv_area_is_on(const lv_area_t * a1_p, const lv_area_t * a2_p);
213
214 /**
215 * Check if an area is fully on an other
216 * @param ain_p pointer to an area which could be in 'aholder_p'
217 * @param aholder_p pointer to an area which could involve 'ain_p'
218 * @param radius radius of `aholder_p` (e.g. for rounded rectangle)
219 * @return true: `ain_p` is fully inside `aholder_p`
220 */
221 bool _lv_area_is_in(const lv_area_t * ain_p, const lv_area_t * aholder_p, lv_coord_t radius);
222
223
224 /**
225 * Check if an area is fully out of an other
226 * @param aout_p pointer to an area which could be in 'aholder_p'
227 * @param aholder_p pointer to an area which could involve 'ain_p'
228 * @param radius radius of `aholder_p` (e.g. for rounded rectangle)
229 * @return true: `aout_p` is fully outside `aholder_p`
230 */
231 bool _lv_area_is_out(const lv_area_t * aout_p, const lv_area_t * aholder_p, lv_coord_t radius);
232
233 /**
234 * Check if 2 area is the same
235 * @param a pointer to an area
236 * @param b pointer to another area
237 */
238 bool _lv_area_is_equal(const lv_area_t * a, const lv_area_t * b);
239
240 /**
241 * Align an area to an other
242 * @param base an are where the other will be aligned
243 * @param to_align the area to align
244 * @param align `LV_ALIGN_...`
245 */
246 void lv_area_align(const lv_area_t * base, lv_area_t * to_align, lv_align_t align, lv_coord_t ofs_x, lv_coord_t ofs_y);
247
248 void lv_point_transform(lv_point_t * p, int32_t angle, int32_t zoom, const lv_point_t * pivot);
249
250 /**********************
251 * MACROS
252 **********************/
253
254 #if LV_USE_LARGE_COORD
255 #define _LV_COORD_TYPE_SHIFT (29U)
256 #else
257 #define _LV_COORD_TYPE_SHIFT (13U)
258 #endif
259
260 #define _LV_COORD_TYPE_MASK (3 << _LV_COORD_TYPE_SHIFT)
261 #define _LV_COORD_TYPE(x) ((x) & _LV_COORD_TYPE_MASK) /*Extract type specifiers*/
262 #define _LV_COORD_PLAIN(x) ((x) & ~_LV_COORD_TYPE_MASK) /*Remove type specifiers*/
263
264 #define _LV_COORD_TYPE_PX (0 << _LV_COORD_TYPE_SHIFT)
265 #define _LV_COORD_TYPE_SPEC (1 << _LV_COORD_TYPE_SHIFT)
266 #define _LV_COORD_TYPE_PX_NEG (3 << _LV_COORD_TYPE_SHIFT)
267
268 #define LV_COORD_IS_PX(x) (_LV_COORD_TYPE(x) == _LV_COORD_TYPE_PX || \
269 _LV_COORD_TYPE(x) == _LV_COORD_TYPE_PX_NEG ? true : false)
270 #define LV_COORD_IS_SPEC(x) (_LV_COORD_TYPE(x) == _LV_COORD_TYPE_SPEC ? true : false)
271
272 #define LV_COORD_SET_SPEC(x) ((x) | _LV_COORD_TYPE_SPEC)
273
274 /*Special coordinates*/
275 #define LV_PCT(x) (x < 0 ? LV_COORD_SET_SPEC(1000 - (x)) : LV_COORD_SET_SPEC(x))
276 #define LV_COORD_IS_PCT(x) ((LV_COORD_IS_SPEC(x) && _LV_COORD_PLAIN(x) <= 2000) ? true : false)
277 #define LV_COORD_GET_PCT(x) (_LV_COORD_PLAIN(x) > 1000 ? 1000 - _LV_COORD_PLAIN(x) : _LV_COORD_PLAIN(x))
278 #define LV_SIZE_CONTENT LV_COORD_SET_SPEC(2001)
279
280 LV_EXPORT_CONST_INT(LV_SIZE_CONTENT);
281
282 /*Max coordinate value*/
283 #define LV_COORD_MAX ((1 << _LV_COORD_TYPE_SHIFT) - 1)
284 #define LV_COORD_MIN (-LV_COORD_MAX)
285
286 LV_EXPORT_CONST_INT(LV_COORD_MAX);
287 LV_EXPORT_CONST_INT(LV_COORD_MIN);
288
289 /**
290 * Convert a percentage value to `lv_coord_t`.
291 * Percentage values are stored in special range
292 * @param x the percentage (0..1000)
293 * @return a coordinate that stores the percentage
294 */
lv_pct(lv_coord_t x)295 static inline lv_coord_t lv_pct(lv_coord_t x)
296 {
297 return LV_PCT(x);
298 }
299
300 #ifdef __cplusplus
301 } /*extern "C"*/
302 #endif
303
304 #endif
305
