1 /**
2 * @file lv_mask.c
3 *
4 */
5
6 /*********************
7 * INCLUDES
8 *********************/
9 #include "lv_draw.h"
10 #if LV_DRAW_COMPLEX
11 #include "../misc/lv_math.h"
12 #include "../misc/lv_log.h"
13 #include "../misc/lv_assert.h"
14 #include "../misc/lv_gc.h"
15
16 /*********************
17 * DEFINES
18 *********************/
19 #define CIRCLE_CACHE_LIFE_MAX 1000
20 #define CIRCLE_CACHE_AGING(life, r) life = LV_MIN(life + (r < 16 ? 1 : (r >> 4)), 1000)
21
22 /**********************
23 * TYPEDEFS
24 **********************/
25
26 /**********************
27 * STATIC PROTOTYPES
28 **********************/
29 LV_ATTRIBUTE_FAST_MEM static lv_draw_mask_res_t lv_draw_mask_line(lv_opa_t * mask_buf, lv_coord_t abs_x,
30 lv_coord_t abs_y, lv_coord_t len,
31 lv_draw_mask_line_param_t * param);
32 LV_ATTRIBUTE_FAST_MEM static lv_draw_mask_res_t lv_draw_mask_radius(lv_opa_t * mask_buf, lv_coord_t abs_x,
33 lv_coord_t abs_y, lv_coord_t len,
34 lv_draw_mask_radius_param_t * param);
35 LV_ATTRIBUTE_FAST_MEM static lv_draw_mask_res_t lv_draw_mask_angle(lv_opa_t * mask_buf, lv_coord_t abs_x,
36 lv_coord_t abs_y, lv_coord_t len,
37 lv_draw_mask_angle_param_t * param);
38 LV_ATTRIBUTE_FAST_MEM static lv_draw_mask_res_t lv_draw_mask_fade(lv_opa_t * mask_buf, lv_coord_t abs_x,
39 lv_coord_t abs_y, lv_coord_t len,
40 lv_draw_mask_fade_param_t * param);
41 LV_ATTRIBUTE_FAST_MEM static lv_draw_mask_res_t lv_draw_mask_map(lv_opa_t * mask_buf, lv_coord_t abs_x,
42 lv_coord_t abs_y, lv_coord_t len,
43 lv_draw_mask_map_param_t * param);
44 LV_ATTRIBUTE_FAST_MEM static lv_draw_mask_res_t lv_draw_mask_polygon(lv_opa_t * mask_buf, lv_coord_t abs_x,
45 lv_coord_t abs_y, lv_coord_t len,
46 lv_draw_mask_polygon_param_t * param);
47
48 LV_ATTRIBUTE_FAST_MEM static lv_draw_mask_res_t line_mask_flat(lv_opa_t * mask_buf, lv_coord_t abs_x, lv_coord_t abs_y,
49 lv_coord_t len,
50 lv_draw_mask_line_param_t * p);
51 LV_ATTRIBUTE_FAST_MEM static lv_draw_mask_res_t line_mask_steep(lv_opa_t * mask_buf, lv_coord_t abs_x, lv_coord_t abs_y,
52 lv_coord_t len,
53 lv_draw_mask_line_param_t * p);
54
55 static void circ_init(lv_point_t * c, lv_coord_t * tmp, lv_coord_t radius);
56 static bool circ_cont(lv_point_t * c);
57 static void circ_next(lv_point_t * c, lv_coord_t * tmp);
58 static void circ_calc_aa4(_lv_draw_mask_radius_circle_dsc_t * c, lv_coord_t radius);
59 static lv_opa_t * get_next_line(_lv_draw_mask_radius_circle_dsc_t * c, lv_coord_t y, lv_coord_t * len,
60 lv_coord_t * x_start);
61 LV_ATTRIBUTE_FAST_MEM static inline lv_opa_t mask_mix(lv_opa_t mask_act, lv_opa_t mask_new);
62
63 /**********************
64 * STATIC VARIABLES
65 **********************/
66
67 /**********************
68 * MACROS
69 **********************/
70
71 /**********************
72 * GLOBAL FUNCTIONS
73 **********************/
74
75 /**
76 * Add a draw mask. Everything drawn after it (until removing the mask) will be affected by the mask.
77 * @param param an initialized mask parameter. Only the pointer is saved.
78 * @param custom_id a custom pointer to identify the mask. Used in `lv_draw_mask_remove_custom`.
79 * @return the an integer, the ID of the mask. Can be used in `lv_draw_mask_remove_id`.
80 */
lv_draw_mask_add(void * param,void * custom_id)81 int16_t lv_draw_mask_add(void * param, void * custom_id)
82 {
83 /*Look for a free entry*/
84 uint8_t i;
85 for(i = 0; i < _LV_MASK_MAX_NUM; i++) {
86 if(LV_GC_ROOT(_lv_draw_mask_list[i]).param == NULL) break;
87 }
88
89 if(i >= _LV_MASK_MAX_NUM) {
90 LV_LOG_WARN("lv_mask_add: no place to add the mask");
91 return LV_MASK_ID_INV;
92 }
93
94 LV_GC_ROOT(_lv_draw_mask_list[i]).param = param;
95 LV_GC_ROOT(_lv_draw_mask_list[i]).custom_id = custom_id;
96
97 return i;
98 }
99
100 /**
101 * Apply the added buffers on a line. Used internally by the library's drawing routines.
102 * @param mask_buf store the result mask here. Has to be `len` byte long. Should be initialized with `0xFF`.
103 * @param abs_x absolute X coordinate where the line to calculate start
104 * @param abs_y absolute Y coordinate where the line to calculate start
105 * @param len length of the line to calculate (in pixel count)
106 * @return One of these values:
107 * - `LV_DRAW_MASK_RES_FULL_TRANSP`: the whole line is transparent. `mask_buf` is not set to zero
108 * - `LV_DRAW_MASK_RES_FULL_COVER`: the whole line is fully visible. `mask_buf` is unchanged
109 * - `LV_DRAW_MASK_RES_CHANGED`: `mask_buf` has changed, it shows the desired opacity of each pixel in the given line
110 */
lv_draw_mask_apply(lv_opa_t * mask_buf,lv_coord_t abs_x,lv_coord_t abs_y,lv_coord_t len)111 LV_ATTRIBUTE_FAST_MEM lv_draw_mask_res_t lv_draw_mask_apply(lv_opa_t * mask_buf, lv_coord_t abs_x, lv_coord_t abs_y,
112 lv_coord_t len)
113 {
114 bool changed = false;
115 _lv_draw_mask_common_dsc_t * dsc;
116
117 _lv_draw_mask_saved_t * m = LV_GC_ROOT(_lv_draw_mask_list);
118
119 while(m->param) {
120 dsc = m->param;
121 lv_draw_mask_res_t res = LV_DRAW_MASK_RES_FULL_COVER;
122 res = dsc->cb(mask_buf, abs_x, abs_y, len, (void *)m->param);
123 if(res == LV_DRAW_MASK_RES_TRANSP) return LV_DRAW_MASK_RES_TRANSP;
124 else if(res == LV_DRAW_MASK_RES_CHANGED) changed = true;
125
126 m++;
127 }
128
129 return changed ? LV_DRAW_MASK_RES_CHANGED : LV_DRAW_MASK_RES_FULL_COVER;
130 }
131
132 /**
133 * Apply the specified buffers on a line. Used internally by the library's drawing routines.
134 * @param mask_buf store the result mask here. Has to be `len` byte long. Should be initialized with `0xFF`.
135 * @param abs_x absolute X coordinate where the line to calculate start
136 * @param abs_y absolute Y coordinate where the line to calculate start
137 * @param len length of the line to calculate (in pixel count)
138 * @param ids ID array of added buffers
139 * @param ids_count number of ID array
140 * @return One of these values:
141 * - `LV_DRAW_MASK_RES_FULL_TRANSP`: the whole line is transparent. `mask_buf` is not set to zero
142 * - `LV_DRAW_MASK_RES_FULL_COVER`: the whole line is fully visible. `mask_buf` is unchanged
143 * - `LV_DRAW_MASK_RES_CHANGED`: `mask_buf` has changed, it shows the desired opacity of each pixel in the given line
144 */
lv_draw_mask_apply_ids(lv_opa_t * mask_buf,lv_coord_t abs_x,lv_coord_t abs_y,lv_coord_t len,const int16_t * ids,int16_t ids_count)145 LV_ATTRIBUTE_FAST_MEM lv_draw_mask_res_t lv_draw_mask_apply_ids(lv_opa_t * mask_buf, lv_coord_t abs_x, lv_coord_t abs_y,
146 lv_coord_t len, const int16_t * ids, int16_t ids_count)
147 {
148 bool changed = false;
149 _lv_draw_mask_common_dsc_t * dsc;
150
151 for(int i = 0; i < ids_count; i++) {
152 int16_t id = ids[i];
153 if(id == LV_MASK_ID_INV) continue;
154 dsc = LV_GC_ROOT(_lv_draw_mask_list[id]).param;
155 if(!dsc) continue;
156 lv_draw_mask_res_t res = LV_DRAW_MASK_RES_FULL_COVER;
157 res = dsc->cb(mask_buf, abs_x, abs_y, len, dsc);
158 if(res == LV_DRAW_MASK_RES_TRANSP) return LV_DRAW_MASK_RES_TRANSP;
159 else if(res == LV_DRAW_MASK_RES_CHANGED) changed = true;
160 }
161
162 return changed ? LV_DRAW_MASK_RES_CHANGED : LV_DRAW_MASK_RES_FULL_COVER;
163 }
164
165 /**
166 * Remove a mask with a given ID
167 * @param id the ID of the mask. Returned by `lv_draw_mask_add`
168 * @return the parameter of the removed mask.
169 * If more masks have `custom_id` ID then the last mask's parameter will be returned
170 */
lv_draw_mask_remove_id(int16_t id)171 void * lv_draw_mask_remove_id(int16_t id)
172 {
173 _lv_draw_mask_common_dsc_t * p = NULL;
174
175 if(id != LV_MASK_ID_INV) {
176 p = LV_GC_ROOT(_lv_draw_mask_list[id]).param;
177 LV_GC_ROOT(_lv_draw_mask_list[id]).param = NULL;
178 LV_GC_ROOT(_lv_draw_mask_list[id]).custom_id = NULL;
179 }
180
181 return p;
182 }
183
184 /**
185 * Remove all mask with a given custom ID
186 * @param custom_id a pointer used in `lv_draw_mask_add`
187 * @return return the parameter of the removed mask.
188 * If more masks have `custom_id` ID then the last mask's parameter will be returned
189 */
lv_draw_mask_remove_custom(void * custom_id)190 void * lv_draw_mask_remove_custom(void * custom_id)
191 {
192 _lv_draw_mask_common_dsc_t * p = NULL;
193 uint8_t i;
194 for(i = 0; i < _LV_MASK_MAX_NUM; i++) {
195 if(LV_GC_ROOT(_lv_draw_mask_list[i]).custom_id == custom_id) {
196 p = LV_GC_ROOT(_lv_draw_mask_list[i]).param;
197 lv_draw_mask_remove_id(i);
198 }
199 }
200 return p;
201 }
202
203 /**
204 * Free the data from the parameter.
205 * It's called inside `lv_draw_mask_remove_id` and `lv_draw_mask_remove_custom`
206 * Needs to be called only in special cases when the mask is not added by `lv_draw_mask_add`
207 * and not removed by `lv_draw_mask_remove_id` or `lv_draw_mask_remove_custom`
208 * @param p pointer to a mask parameter
209 */
lv_draw_mask_free_param(void * p)210 void lv_draw_mask_free_param(void * p)
211 {
212 _lv_draw_mask_common_dsc_t * pdsc = p;
213 if(pdsc->type == LV_DRAW_MASK_TYPE_RADIUS) {
214 lv_draw_mask_radius_param_t * radius_p = (lv_draw_mask_radius_param_t *) p;
215 if(radius_p->circle) {
216 if(radius_p->circle->life < 0) {
217 lv_mem_free(radius_p->circle->cir_opa);
218 lv_mem_free(radius_p->circle);
219 }
220 else {
221 radius_p->circle->used_cnt--;
222 }
223 }
224 }
225 else if(pdsc->type == LV_DRAW_MASK_TYPE_POLYGON) {
226 lv_draw_mask_polygon_param_t * poly_p = (lv_draw_mask_polygon_param_t *) p;
227 lv_mem_free(poly_p->cfg.points);
228 }
229 }
230
_lv_draw_mask_cleanup(void)231 void _lv_draw_mask_cleanup(void)
232 {
233 uint8_t i;
234 for(i = 0; i < LV_CIRCLE_CACHE_SIZE; i++) {
235 if(LV_GC_ROOT(_lv_circle_cache[i]).buf) {
236 lv_mem_free(LV_GC_ROOT(_lv_circle_cache[i]).buf);
237 }
238 lv_memset_00(&LV_GC_ROOT(_lv_circle_cache[i]), sizeof(LV_GC_ROOT(_lv_circle_cache[i])));
239 }
240 }
241
242 /**
243 * Count the currently added masks
244 * @return number of active masks
245 */
lv_draw_mask_get_cnt(void)246 LV_ATTRIBUTE_FAST_MEM uint8_t lv_draw_mask_get_cnt(void)
247 {
248 uint8_t cnt = 0;
249 uint8_t i;
250 for(i = 0; i < _LV_MASK_MAX_NUM; i++) {
251 if(LV_GC_ROOT(_lv_draw_mask_list[i]).param) cnt++;
252 }
253 return cnt;
254 }
255
lv_draw_mask_is_any(const lv_area_t * a)256 bool lv_draw_mask_is_any(const lv_area_t * a)
257 {
258 if(a == NULL) return LV_GC_ROOT(_lv_draw_mask_list[0]).param ? true : false;
259
260 uint8_t i;
261 for(i = 0; i < _LV_MASK_MAX_NUM; i++) {
262 _lv_draw_mask_common_dsc_t * comm_param = LV_GC_ROOT(_lv_draw_mask_list[i]).param;
263 if(comm_param == NULL) continue;
264 if(comm_param->type == LV_DRAW_MASK_TYPE_RADIUS) {
265 lv_draw_mask_radius_param_t * radius_param = LV_GC_ROOT(_lv_draw_mask_list[i]).param;
266 if(radius_param->cfg.outer) {
267 if(!_lv_area_is_out(a, &radius_param->cfg.rect, radius_param->cfg.radius)) return true;
268 }
269 else {
270 if(!_lv_area_is_in(a, &radius_param->cfg.rect, radius_param->cfg.radius)) return true;
271 }
272 }
273 else {
274 return true;
275 }
276 }
277
278 return false;
279
280 }
281
282 /**
283 *Initialize a line mask from two points.
284 * @param param pointer to a `lv_draw_mask_param_t` to initialize
285 * @param p1x X coordinate of the first point of the line
286 * @param p1y Y coordinate of the first point of the line
287 * @param p2x X coordinate of the second point of the line
288 * @param p2y y coordinate of the second point of the line
289 * @param side and element of `lv_draw_mask_line_side_t` to describe which side to keep.
290 * With `LV_DRAW_MASK_LINE_SIDE_LEFT/RIGHT` and horizontal line all pixels are kept
291 * With `LV_DRAW_MASK_LINE_SIDE_TOP/BOTTOM` and vertical line all pixels are kept
292 */
lv_draw_mask_line_points_init(lv_draw_mask_line_param_t * param,lv_coord_t p1x,lv_coord_t p1y,lv_coord_t p2x,lv_coord_t p2y,lv_draw_mask_line_side_t side)293 void lv_draw_mask_line_points_init(lv_draw_mask_line_param_t * param, lv_coord_t p1x, lv_coord_t p1y, lv_coord_t p2x,
294 lv_coord_t p2y, lv_draw_mask_line_side_t side)
295 {
296 lv_memset_00(param, sizeof(lv_draw_mask_line_param_t));
297
298 if(p1y == p2y && side == LV_DRAW_MASK_LINE_SIDE_BOTTOM) {
299 p1y--;
300 p2y--;
301 }
302
303 if(p1y > p2y) {
304 lv_coord_t t;
305 t = p2x;
306 p2x = p1x;
307 p1x = t;
308
309 t = p2y;
310 p2y = p1y;
311 p1y = t;
312 }
313
314 param->cfg.p1.x = p1x;
315 param->cfg.p1.y = p1y;
316 param->cfg.p2.x = p2x;
317 param->cfg.p2.y = p2y;
318 param->cfg.side = side;
319
320 param->origo.x = p1x;
321 param->origo.y = p1y;
322 param->flat = (LV_ABS(p2x - p1x) > LV_ABS(p2y - p1y)) ? 1 : 0;
323 param->yx_steep = 0;
324 param->xy_steep = 0;
325 param->dsc.cb = (lv_draw_mask_xcb_t)lv_draw_mask_line;
326 param->dsc.type = LV_DRAW_MASK_TYPE_LINE;
327
328 int32_t dx = p2x - p1x;
329 int32_t dy = p2y - p1y;
330
331 if(param->flat) {
332 /*Normalize the steep. Delta x should be relative to delta x = 1024*/
333 int32_t m;
334
335 if(dx) {
336 m = (1L << 20) / dx; /*m is multiplier to normalize y (upscaled by 1024)*/
337 param->yx_steep = (m * dy) >> 10;
338 }
339
340 if(dy) {
341 m = (1L << 20) / dy; /*m is multiplier to normalize x (upscaled by 1024)*/
342 param->xy_steep = (m * dx) >> 10;
343 }
344 param->steep = param->yx_steep;
345 }
346 else {
347 /*Normalize the steep. Delta y should be relative to delta x = 1024*/
348 int32_t m;
349
350 if(dy) {
351 m = (1L << 20) / dy; /*m is multiplier to normalize x (upscaled by 1024)*/
352 param->xy_steep = (m * dx) >> 10;
353 }
354
355 if(dx) {
356 m = (1L << 20) / dx; /*m is multiplier to normalize x (upscaled by 1024)*/
357 param->yx_steep = (m * dy) >> 10;
358 }
359 param->steep = param->xy_steep;
360 }
361
362 if(param->cfg.side == LV_DRAW_MASK_LINE_SIDE_LEFT) param->inv = 0;
363 else if(param->cfg.side == LV_DRAW_MASK_LINE_SIDE_RIGHT) param->inv = 1;
364 else if(param->cfg.side == LV_DRAW_MASK_LINE_SIDE_TOP) {
365 if(param->steep > 0) param->inv = 1;
366 else param->inv = 0;
367 }
368 else if(param->cfg.side == LV_DRAW_MASK_LINE_SIDE_BOTTOM) {
369 if(param->steep > 0) param->inv = 0;
370 else param->inv = 1;
371 }
372
373 param->spx = param->steep >> 2;
374 if(param->steep < 0) param->spx = -param->spx;
375 }
376
377 /**
378 *Initialize a line mask from a point and an angle.
379 * @param param pointer to a `lv_draw_mask_param_t` to initialize
380 * @param px X coordinate of a point of the line
381 * @param py X coordinate of a point of the line
382 * @param angle right 0 deg, bottom: 90
383 * @param side and element of `lv_draw_mask_line_side_t` to describe which side to keep.
384 * With `LV_DRAW_MASK_LINE_SIDE_LEFT/RIGHT` and horizontal line all pixels are kept
385 * With `LV_DRAW_MASK_LINE_SIDE_TOP/BOTTOM` and vertical line all pixels are kept
386 */
lv_draw_mask_line_angle_init(lv_draw_mask_line_param_t * param,lv_coord_t p1x,lv_coord_t py,int16_t angle,lv_draw_mask_line_side_t side)387 void lv_draw_mask_line_angle_init(lv_draw_mask_line_param_t * param, lv_coord_t p1x, lv_coord_t py, int16_t angle,
388 lv_draw_mask_line_side_t side)
389 {
390 /*Find an optimal degree.
391 *lv_mask_line_points_init will swap the points to keep the smaller y in p1
392 *Theoretically a line with `angle` or `angle+180` is the same only the points are swapped
393 *Find the degree which keeps the origo in place*/
394 if(angle > 180) angle -= 180; /*> 180 will swap the origo*/
395
396 int32_t p2x;
397 int32_t p2y;
398
399 p2x = (lv_trigo_sin(angle + 90) >> 5) + p1x;
400 p2y = (lv_trigo_sin(angle) >> 5) + py;
401
402 lv_draw_mask_line_points_init(param, p1x, py, p2x, p2y, side);
403 }
404
405 /**
406 * Initialize an angle mask.
407 * @param param pointer to a `lv_draw_mask_param_t` to initialize
408 * @param vertex_x X coordinate of the angle vertex (absolute coordinates)
409 * @param vertex_y Y coordinate of the angle vertex (absolute coordinates)
410 * @param start_angle start angle in degrees. 0 deg on the right, 90 deg, on the bottom
411 * @param end_angle end angle
412 */
lv_draw_mask_angle_init(lv_draw_mask_angle_param_t * param,lv_coord_t vertex_x,lv_coord_t vertex_y,lv_coord_t start_angle,lv_coord_t end_angle)413 void lv_draw_mask_angle_init(lv_draw_mask_angle_param_t * param, lv_coord_t vertex_x, lv_coord_t vertex_y,
414 lv_coord_t start_angle, lv_coord_t end_angle)
415 {
416 lv_draw_mask_line_side_t start_side;
417 lv_draw_mask_line_side_t end_side;
418
419 /*Constrain the input angles*/
420 if(start_angle < 0)
421 start_angle = 0;
422 else if(start_angle > 359)
423 start_angle = 359;
424
425 if(end_angle < 0)
426 end_angle = 0;
427 else if(end_angle > 359)
428 end_angle = 359;
429
430 if(end_angle < start_angle) {
431 param->delta_deg = 360 - start_angle + end_angle;
432 }
433 else {
434 param->delta_deg = LV_ABS(end_angle - start_angle);
435 }
436
437 param->cfg.start_angle = start_angle;
438 param->cfg.end_angle = end_angle;
439 param->cfg.vertex_p.x = vertex_x;
440 param->cfg.vertex_p.y = vertex_y;
441 param->dsc.cb = (lv_draw_mask_xcb_t)lv_draw_mask_angle;
442 param->dsc.type = LV_DRAW_MASK_TYPE_ANGLE;
443
444 LV_ASSERT_MSG(start_angle >= 0 && start_angle <= 360, "Unexpected start angle");
445
446 if(start_angle >= 0 && start_angle < 180) {
447 start_side = LV_DRAW_MASK_LINE_SIDE_LEFT;
448 }
449 else
450 start_side = LV_DRAW_MASK_LINE_SIDE_RIGHT; /*silence compiler*/
451
452 LV_ASSERT_MSG(end_angle >= 0 && start_angle <= 360, "Unexpected end angle");
453
454 if(end_angle >= 0 && end_angle < 180) {
455 end_side = LV_DRAW_MASK_LINE_SIDE_RIGHT;
456 }
457 else if(end_angle >= 180 && end_angle < 360) {
458 end_side = LV_DRAW_MASK_LINE_SIDE_LEFT;
459 }
460 else
461 end_side = LV_DRAW_MASK_LINE_SIDE_RIGHT; /*silence compiler*/
462
463 lv_draw_mask_line_angle_init(¶m->start_line, vertex_x, vertex_y, start_angle, start_side);
464 lv_draw_mask_line_angle_init(¶m->end_line, vertex_x, vertex_y, end_angle, end_side);
465 }
466
467 /**
468 * Initialize a fade mask.
469 * @param param pointer to an `lv_draw_mask_radius_param_t` to initialize
470 * @param rect coordinates of the rectangle to affect (absolute coordinates)
471 * @param radius radius of the rectangle
472 * @param inv true: keep the pixels inside the rectangle; keep the pixels outside of the rectangle
473 */
lv_draw_mask_radius_init(lv_draw_mask_radius_param_t * param,const lv_area_t * rect,lv_coord_t radius,bool inv)474 void lv_draw_mask_radius_init(lv_draw_mask_radius_param_t * param, const lv_area_t * rect, lv_coord_t radius, bool inv)
475 {
476 lv_coord_t w = lv_area_get_width(rect);
477 lv_coord_t h = lv_area_get_height(rect);
478 int32_t short_side = LV_MIN(w, h);
479 if(radius > short_side >> 1) radius = short_side >> 1;
480 if(radius < 0) radius = 0;
481
482 lv_area_copy(¶m->cfg.rect, rect);
483 param->cfg.radius = radius;
484 param->cfg.outer = inv ? 1 : 0;
485 param->dsc.cb = (lv_draw_mask_xcb_t)lv_draw_mask_radius;
486 param->dsc.type = LV_DRAW_MASK_TYPE_RADIUS;
487
488 if(radius == 0) {
489 param->circle = NULL;
490 return;
491 }
492
493 uint32_t i;
494
495 /*Try to reuse a circle cache entry*/
496 for(i = 0; i < LV_CIRCLE_CACHE_SIZE; i++) {
497 if(LV_GC_ROOT(_lv_circle_cache[i]).radius == radius) {
498 LV_GC_ROOT(_lv_circle_cache[i]).used_cnt++;
499 CIRCLE_CACHE_AGING(LV_GC_ROOT(_lv_circle_cache[i]).life, radius);
500 param->circle = &LV_GC_ROOT(_lv_circle_cache[i]);
501 return;
502 }
503 }
504
505 /*If not found find a free entry with lowest life*/
506 _lv_draw_mask_radius_circle_dsc_t * entry = NULL;
507 for(i = 0; i < LV_CIRCLE_CACHE_SIZE; i++) {
508 if(LV_GC_ROOT(_lv_circle_cache[i]).used_cnt == 0) {
509 if(!entry) entry = &LV_GC_ROOT(_lv_circle_cache[i]);
510 else if(LV_GC_ROOT(_lv_circle_cache[i]).life < entry->life) entry = &LV_GC_ROOT(_lv_circle_cache[i]);
511 }
512 }
513
514 if(!entry) {
515 entry = lv_mem_alloc(sizeof(_lv_draw_mask_radius_circle_dsc_t));
516 LV_ASSERT_MALLOC(entry);
517 lv_memset_00(entry, sizeof(_lv_draw_mask_radius_circle_dsc_t));
518 entry->life = -1;
519 }
520 else {
521 entry->used_cnt++;
522 entry->life = 0;
523 CIRCLE_CACHE_AGING(entry->life, radius);
524 }
525
526 param->circle = entry;
527
528 circ_calc_aa4(param->circle, radius);
529 }
530
531 /**
532 * Initialize a fade mask.
533 * @param param pointer to a `lv_draw_mask_param_t` to initialize
534 * @param coords coordinates of the area to affect (absolute coordinates)
535 * @param opa_top opacity on the top
536 * @param y_top at which coordinate start to change to opacity to `opa_bottom`
537 * @param opa_bottom opacity at the bottom
538 * @param y_bottom at which coordinate reach `opa_bottom`.
539 */
lv_draw_mask_fade_init(lv_draw_mask_fade_param_t * param,const lv_area_t * coords,lv_opa_t opa_top,lv_coord_t y_top,lv_opa_t opa_bottom,lv_coord_t y_bottom)540 void lv_draw_mask_fade_init(lv_draw_mask_fade_param_t * param, const lv_area_t * coords, lv_opa_t opa_top,
541 lv_coord_t y_top,
542 lv_opa_t opa_bottom, lv_coord_t y_bottom)
543 {
544 lv_area_copy(¶m->cfg.coords, coords);
545 param->cfg.opa_top = opa_top;
546 param->cfg.opa_bottom = opa_bottom;
547 param->cfg.y_top = y_top;
548 param->cfg.y_bottom = y_bottom;
549 param->dsc.cb = (lv_draw_mask_xcb_t)lv_draw_mask_fade;
550 param->dsc.type = LV_DRAW_MASK_TYPE_FADE;
551 }
552
553 /**
554 * Initialize a map mask.
555 * @param param pointer to a `lv_draw_mask_param_t` to initialize
556 * @param coords coordinates of the map (absolute coordinates)
557 * @param map array of bytes with the mask values
558 */
lv_draw_mask_map_init(lv_draw_mask_map_param_t * param,const lv_area_t * coords,const lv_opa_t * map)559 void lv_draw_mask_map_init(lv_draw_mask_map_param_t * param, const lv_area_t * coords, const lv_opa_t * map)
560 {
561 lv_area_copy(¶m->cfg.coords, coords);
562 param->cfg.map = map;
563 param->dsc.cb = (lv_draw_mask_xcb_t)lv_draw_mask_map;
564 param->dsc.type = LV_DRAW_MASK_TYPE_MAP;
565 }
566
lv_draw_mask_polygon_init(lv_draw_mask_polygon_param_t * param,const lv_point_t * points,uint16_t point_cnt)567 void lv_draw_mask_polygon_init(lv_draw_mask_polygon_param_t * param, const lv_point_t * points, uint16_t point_cnt)
568 {
569 /*Join adjacent points if they are on the same coordinate*/
570 lv_point_t * p = lv_mem_alloc(point_cnt * sizeof(lv_point_t));
571 if(p == NULL) return;
572 uint16_t i;
573 uint16_t pcnt = 0;
574 p[0] = points[0];
575 for(i = 0; i < point_cnt - 1; i++) {
576 if(points[i].x != points[i + 1].x || points[i].y != points[i + 1].y) {
577 p[pcnt] = points[i];
578 pcnt++;
579 }
580 }
581 /*The first and the last points are also adjacent*/
582 if(points[0].x != points[point_cnt - 1].x || points[0].y != points[point_cnt - 1].y) {
583 p[pcnt] = points[point_cnt - 1];
584 pcnt++;
585 }
586 param->cfg.points = p;
587 param->cfg.point_cnt = pcnt;
588 param->dsc.cb = (lv_draw_mask_xcb_t)lv_draw_mask_polygon;
589 param->dsc.type = LV_DRAW_MASK_TYPE_POLYGON;
590 }
591
592 /**********************
593 * STATIC FUNCTIONS
594 **********************/
595
lv_draw_mask_line(lv_opa_t * mask_buf,lv_coord_t abs_x,lv_coord_t abs_y,lv_coord_t len,lv_draw_mask_line_param_t * p)596 LV_ATTRIBUTE_FAST_MEM static lv_draw_mask_res_t lv_draw_mask_line(lv_opa_t * mask_buf, lv_coord_t abs_x,
597 lv_coord_t abs_y, lv_coord_t len,
598 lv_draw_mask_line_param_t * p)
599 {
600 /*Make to points relative to the vertex*/
601 abs_y -= p->origo.y;
602 abs_x -= p->origo.x;
603
604 /*Handle special cases*/
605 if(p->steep == 0) {
606 /*Horizontal*/
607 if(p->flat) {
608 /*Non sense: Can't be on the right/left of a horizontal line*/
609 if(p->cfg.side == LV_DRAW_MASK_LINE_SIDE_LEFT ||
610 p->cfg.side == LV_DRAW_MASK_LINE_SIDE_RIGHT) return LV_DRAW_MASK_RES_FULL_COVER;
611 else if(p->cfg.side == LV_DRAW_MASK_LINE_SIDE_TOP && abs_y + 1 < 0) return LV_DRAW_MASK_RES_FULL_COVER;
612 else if(p->cfg.side == LV_DRAW_MASK_LINE_SIDE_BOTTOM && abs_y > 0) return LV_DRAW_MASK_RES_FULL_COVER;
613 else {
614 return LV_DRAW_MASK_RES_TRANSP;
615 }
616 }
617 /*Vertical*/
618 else {
619 /*Non sense: Can't be on the top/bottom of a vertical line*/
620 if(p->cfg.side == LV_DRAW_MASK_LINE_SIDE_TOP ||
621 p->cfg.side == LV_DRAW_MASK_LINE_SIDE_BOTTOM) return LV_DRAW_MASK_RES_FULL_COVER;
622 else if(p->cfg.side == LV_DRAW_MASK_LINE_SIDE_RIGHT && abs_x > 0) return LV_DRAW_MASK_RES_FULL_COVER;
623 else if(p->cfg.side == LV_DRAW_MASK_LINE_SIDE_LEFT) {
624 if(abs_x + len < 0) return LV_DRAW_MASK_RES_FULL_COVER;
625 else {
626 int32_t k = - abs_x;
627 if(k < 0) return LV_DRAW_MASK_RES_TRANSP;
628 if(k >= 0 && k < len) lv_memset_00(&mask_buf[k], len - k);
629 return LV_DRAW_MASK_RES_CHANGED;
630 }
631 }
632 else {
633 if(abs_x + len < 0) return LV_DRAW_MASK_RES_TRANSP;
634 else {
635 int32_t k = - abs_x;
636 if(k < 0) k = 0;
637 if(k >= len) return LV_DRAW_MASK_RES_TRANSP;
638 else if(k >= 0 && k < len) lv_memset_00(&mask_buf[0], k);
639 return LV_DRAW_MASK_RES_CHANGED;
640 }
641 }
642 }
643 }
644
645 lv_draw_mask_res_t res;
646 if(p->flat) {
647 res = line_mask_flat(mask_buf, abs_x, abs_y, len, p);
648 }
649 else {
650 res = line_mask_steep(mask_buf, abs_x, abs_y, len, p);
651 }
652
653 return res;
654 }
655
line_mask_flat(lv_opa_t * mask_buf,lv_coord_t abs_x,lv_coord_t abs_y,lv_coord_t len,lv_draw_mask_line_param_t * p)656 LV_ATTRIBUTE_FAST_MEM static lv_draw_mask_res_t line_mask_flat(lv_opa_t * mask_buf, lv_coord_t abs_x, lv_coord_t abs_y,
657 lv_coord_t len,
658 lv_draw_mask_line_param_t * p)
659 {
660
661 int32_t y_at_x;
662 y_at_x = (int32_t)((int32_t)p->yx_steep * abs_x) >> 10;
663
664 if(p->yx_steep > 0) {
665 if(y_at_x > abs_y) {
666 if(p->inv) {
667 return LV_DRAW_MASK_RES_FULL_COVER;
668 }
669 else {
670 return LV_DRAW_MASK_RES_TRANSP;
671 }
672 }
673 }
674 else {
675 if(y_at_x < abs_y) {
676 if(p->inv) {
677 return LV_DRAW_MASK_RES_FULL_COVER;
678 }
679 else {
680 return LV_DRAW_MASK_RES_TRANSP;
681 }
682 }
683 }
684
685 /*At the end of the mask if the limit line is smaller than the mask's y.
686 *Then the mask is in the "good" area*/
687 y_at_x = (int32_t)((int32_t)p->yx_steep * (abs_x + len)) >> 10;
688 if(p->yx_steep > 0) {
689 if(y_at_x < abs_y) {
690 if(p->inv) {
691 return LV_DRAW_MASK_RES_TRANSP;
692 }
693 else {
694 return LV_DRAW_MASK_RES_FULL_COVER;
695 }
696 }
697 }
698 else {
699 if(y_at_x > abs_y) {
700 if(p->inv) {
701 return LV_DRAW_MASK_RES_TRANSP;
702 }
703 else {
704 return LV_DRAW_MASK_RES_FULL_COVER;
705 }
706 }
707 }
708
709 int32_t xe;
710 if(p->yx_steep > 0) xe = ((abs_y * 256) * p->xy_steep) >> 10;
711 else xe = (((abs_y + 1) * 256) * p->xy_steep) >> 10;
712
713 int32_t xei = xe >> 8;
714 int32_t xef = xe & 0xFF;
715
716 int32_t px_h;
717 if(xef == 0) px_h = 255;
718 else px_h = 255 - (((255 - xef) * p->spx) >> 8);
719 int32_t k = xei - abs_x;
720 lv_opa_t m;
721
722 if(xef) {
723 if(k >= 0 && k < len) {
724 m = 255 - (((255 - xef) * (255 - px_h)) >> 9);
725 if(p->inv) m = 255 - m;
726 mask_buf[k] = mask_mix(mask_buf[k], m);
727 }
728 k++;
729 }
730
731 while(px_h > p->spx) {
732 if(k >= 0 && k < len) {
733 m = px_h - (p->spx >> 1);
734 if(p->inv) m = 255 - m;
735 mask_buf[k] = mask_mix(mask_buf[k], m);
736 }
737 px_h -= p->spx;
738 k++;
739 if(k >= len) break;
740 }
741
742 if(k < len && k >= 0) {
743 int32_t x_inters = (px_h * p->xy_steep) >> 10;
744 m = (x_inters * px_h) >> 9;
745 if(p->yx_steep < 0) m = 255 - m;
746 if(p->inv) m = 255 - m;
747 mask_buf[k] = mask_mix(mask_buf[k], m);
748 }
749
750 if(p->inv) {
751 k = xei - abs_x;
752 if(k > len) {
753 return LV_DRAW_MASK_RES_TRANSP;
754 }
755 if(k >= 0) {
756 lv_memset_00(&mask_buf[0], k);
757 }
758 }
759 else {
760 k++;
761 if(k < 0) {
762 return LV_DRAW_MASK_RES_TRANSP;
763 }
764 if(k <= len) {
765 lv_memset_00(&mask_buf[k], len - k);
766 }
767 }
768
769 return LV_DRAW_MASK_RES_CHANGED;
770 }
771
line_mask_steep(lv_opa_t * mask_buf,lv_coord_t abs_x,lv_coord_t abs_y,lv_coord_t len,lv_draw_mask_line_param_t * p)772 LV_ATTRIBUTE_FAST_MEM static lv_draw_mask_res_t line_mask_steep(lv_opa_t * mask_buf, lv_coord_t abs_x, lv_coord_t abs_y,
773 lv_coord_t len,
774 lv_draw_mask_line_param_t * p)
775 {
776 int32_t k;
777 int32_t x_at_y;
778 /*At the beginning of the mask if the limit line is greater than the mask's y.
779 *Then the mask is in the "wrong" area*/
780 x_at_y = (int32_t)((int32_t)p->xy_steep * abs_y) >> 10;
781 if(p->xy_steep > 0) x_at_y++;
782 if(x_at_y < abs_x) {
783 if(p->inv) {
784 return LV_DRAW_MASK_RES_FULL_COVER;
785 }
786 else {
787 return LV_DRAW_MASK_RES_TRANSP;
788 }
789 }
790
791 /*At the end of the mask if the limit line is smaller than the mask's y.
792 *Then the mask is in the "good" area*/
793 x_at_y = (int32_t)((int32_t)p->xy_steep * (abs_y)) >> 10;
794 if(x_at_y > abs_x + len) {
795 if(p->inv) {
796 return LV_DRAW_MASK_RES_TRANSP;
797 }
798 else {
799 return LV_DRAW_MASK_RES_FULL_COVER;
800 }
801 }
802
803 /*X start*/
804 int32_t xs = ((abs_y * 256) * p->xy_steep) >> 10;
805 int32_t xsi = xs >> 8;
806 int32_t xsf = xs & 0xFF;
807
808 /*X end*/
809 int32_t xe = (((abs_y + 1) * 256) * p->xy_steep) >> 10;
810 int32_t xei = xe >> 8;
811 int32_t xef = xe & 0xFF;
812
813 lv_opa_t m;
814
815 k = xsi - abs_x;
816 if(xsi != xei && (p->xy_steep < 0 && xsf == 0)) {
817 xsf = 0xFF;
818 xsi = xei;
819 k--;
820 }
821
822 if(xsi == xei) {
823 if(k >= 0 && k < len) {
824 m = (xsf + xef) >> 1;
825 if(p->inv) m = 255 - m;
826 mask_buf[k] = mask_mix(mask_buf[k], m);
827 }
828 k++;
829
830 if(p->inv) {
831 k = xsi - abs_x;
832 if(k >= len) {
833 return LV_DRAW_MASK_RES_TRANSP;
834 }
835 if(k >= 0) lv_memset_00(&mask_buf[0], k);
836
837 }
838 else {
839 if(k > len) k = len;
840 if(k == 0) return LV_DRAW_MASK_RES_TRANSP;
841 else if(k > 0) lv_memset_00(&mask_buf[k], len - k);
842 }
843
844 }
845 else {
846 int32_t y_inters;
847 if(p->xy_steep < 0) {
848 y_inters = (xsf * (-p->yx_steep)) >> 10;
849 if(k >= 0 && k < len) {
850 m = (y_inters * xsf) >> 9;
851 if(p->inv) m = 255 - m;
852 mask_buf[k] = mask_mix(mask_buf[k], m);
853 }
854 k--;
855
856 int32_t x_inters = ((255 - y_inters) * (-p->xy_steep)) >> 10;
857
858 if(k >= 0 && k < len) {
859 m = 255 - (((255 - y_inters) * x_inters) >> 9);
860 if(p->inv) m = 255 - m;
861 mask_buf[k] = mask_mix(mask_buf[k], m);
862 }
863
864 k += 2;
865
866 if(p->inv) {
867 k = xsi - abs_x - 1;
868
869 if(k > len) k = len;
870 else if(k > 0) lv_memset_00(&mask_buf[0], k);
871
872 }
873 else {
874 if(k > len) return LV_DRAW_MASK_RES_FULL_COVER;
875 if(k >= 0) lv_memset_00(&mask_buf[k], len - k);
876 }
877
878 }
879 else {
880 y_inters = ((255 - xsf) * p->yx_steep) >> 10;
881 if(k >= 0 && k < len) {
882 m = 255 - ((y_inters * (255 - xsf)) >> 9);
883 if(p->inv) m = 255 - m;
884 mask_buf[k] = mask_mix(mask_buf[k], m);
885 }
886
887 k++;
888
889 int32_t x_inters = ((255 - y_inters) * p->xy_steep) >> 10;
890 if(k >= 0 && k < len) {
891 m = ((255 - y_inters) * x_inters) >> 9;
892 if(p->inv) m = 255 - m;
893 mask_buf[k] = mask_mix(mask_buf[k], m);
894 }
895 k++;
896
897 if(p->inv) {
898 k = xsi - abs_x;
899 if(k > len) return LV_DRAW_MASK_RES_TRANSP;
900 if(k >= 0) lv_memset_00(&mask_buf[0], k);
901
902 }
903 else {
904 if(k > len) k = len;
905 if(k == 0) return LV_DRAW_MASK_RES_TRANSP;
906 else if(k > 0) lv_memset_00(&mask_buf[k], len - k);
907 }
908 }
909 }
910
911 return LV_DRAW_MASK_RES_CHANGED;
912 }
913
lv_draw_mask_angle(lv_opa_t * mask_buf,lv_coord_t abs_x,lv_coord_t abs_y,lv_coord_t len,lv_draw_mask_angle_param_t * p)914 LV_ATTRIBUTE_FAST_MEM static lv_draw_mask_res_t lv_draw_mask_angle(lv_opa_t * mask_buf, lv_coord_t abs_x,
915 lv_coord_t abs_y, lv_coord_t len,
916 lv_draw_mask_angle_param_t * p)
917 {
918 int32_t rel_y = abs_y - p->cfg.vertex_p.y;
919 int32_t rel_x = abs_x - p->cfg.vertex_p.x;
920
921 if(p->cfg.start_angle < 180 && p->cfg.end_angle < 180 &&
922 p->cfg.start_angle != 0 && p->cfg.end_angle != 0 &&
923 p->cfg.start_angle > p->cfg.end_angle) {
924
925 if(abs_y < p->cfg.vertex_p.y) {
926 return LV_DRAW_MASK_RES_FULL_COVER;
927 }
928
929 /*Start angle mask can work only from the end of end angle mask*/
930 int32_t end_angle_first = (rel_y * p->end_line.xy_steep) >> 10;
931 int32_t start_angle_last = ((rel_y + 1) * p->start_line.xy_steep) >> 10;
932
933 /*Do not let the line end cross the vertex else it will affect the opposite part*/
934 if(p->cfg.start_angle > 270 && p->cfg.start_angle <= 359 && start_angle_last < 0) start_angle_last = 0;
935 else if(p->cfg.start_angle > 0 && p->cfg.start_angle <= 90 && start_angle_last < 0) start_angle_last = 0;
936 else if(p->cfg.start_angle > 90 && p->cfg.start_angle < 270 && start_angle_last > 0) start_angle_last = 0;
937
938 if(p->cfg.end_angle > 270 && p->cfg.end_angle <= 359 && start_angle_last < 0) start_angle_last = 0;
939 else if(p->cfg.end_angle > 0 && p->cfg.end_angle <= 90 && start_angle_last < 0) start_angle_last = 0;
940 else if(p->cfg.end_angle > 90 && p->cfg.end_angle < 270 && start_angle_last > 0) start_angle_last = 0;
941
942 int32_t dist = (end_angle_first - start_angle_last) >> 1;
943
944 lv_draw_mask_res_t res1 = LV_DRAW_MASK_RES_FULL_COVER;
945 lv_draw_mask_res_t res2 = LV_DRAW_MASK_RES_FULL_COVER;
946
947 int32_t tmp = start_angle_last + dist - rel_x;
948 if(tmp > len) tmp = len;
949 if(tmp > 0) {
950 res1 = lv_draw_mask_line(&mask_buf[0], abs_x, abs_y, tmp, &p->start_line);
951 if(res1 == LV_DRAW_MASK_RES_TRANSP) {
952 lv_memset_00(&mask_buf[0], tmp);
953 }
954 }
955
956 if(tmp > len) tmp = len;
957 if(tmp < 0) tmp = 0;
958 res2 = lv_draw_mask_line(&mask_buf[tmp], abs_x + tmp, abs_y, len - tmp, &p->end_line);
959 if(res2 == LV_DRAW_MASK_RES_TRANSP) {
960 lv_memset_00(&mask_buf[tmp], len - tmp);
961 }
962 if(res1 == res2) return res1;
963 else return LV_DRAW_MASK_RES_CHANGED;
964 }
965 else if(p->cfg.start_angle > 180 && p->cfg.end_angle > 180 && p->cfg.start_angle > p->cfg.end_angle) {
966
967 if(abs_y > p->cfg.vertex_p.y) {
968 return LV_DRAW_MASK_RES_FULL_COVER;
969 }
970
971 /*Start angle mask can work only from the end of end angle mask*/
972 int32_t end_angle_first = (rel_y * p->end_line.xy_steep) >> 10;
973 int32_t start_angle_last = ((rel_y + 1) * p->start_line.xy_steep) >> 10;
974
975 /*Do not let the line end cross the vertex else it will affect the opposite part*/
976 if(p->cfg.start_angle > 270 && p->cfg.start_angle <= 359 && start_angle_last < 0) start_angle_last = 0;
977 else if(p->cfg.start_angle > 0 && p->cfg.start_angle <= 90 && start_angle_last < 0) start_angle_last = 0;
978 else if(p->cfg.start_angle > 90 && p->cfg.start_angle < 270 && start_angle_last > 0) start_angle_last = 0;
979
980 if(p->cfg.end_angle > 270 && p->cfg.end_angle <= 359 && start_angle_last < 0) start_angle_last = 0;
981 else if(p->cfg.end_angle > 0 && p->cfg.end_angle <= 90 && start_angle_last < 0) start_angle_last = 0;
982 else if(p->cfg.end_angle > 90 && p->cfg.end_angle < 270 && start_angle_last > 0) start_angle_last = 0;
983
984 int32_t dist = (end_angle_first - start_angle_last) >> 1;
985
986 lv_draw_mask_res_t res1 = LV_DRAW_MASK_RES_FULL_COVER;
987 lv_draw_mask_res_t res2 = LV_DRAW_MASK_RES_FULL_COVER;
988
989 int32_t tmp = start_angle_last + dist - rel_x;
990 if(tmp > len) tmp = len;
991 if(tmp > 0) {
992 res1 = lv_draw_mask_line(&mask_buf[0], abs_x, abs_y, tmp, (lv_draw_mask_line_param_t *)&p->end_line);
993 if(res1 == LV_DRAW_MASK_RES_TRANSP) {
994 lv_memset_00(&mask_buf[0], tmp);
995 }
996 }
997
998 if(tmp > len) tmp = len;
999 if(tmp < 0) tmp = 0;
1000 res2 = lv_draw_mask_line(&mask_buf[tmp], abs_x + tmp, abs_y, len - tmp, (lv_draw_mask_line_param_t *)&p->start_line);
1001 if(res2 == LV_DRAW_MASK_RES_TRANSP) {
1002 lv_memset_00(&mask_buf[tmp], len - tmp);
1003 }
1004 if(res1 == res2) return res1;
1005 else return LV_DRAW_MASK_RES_CHANGED;
1006 }
1007 else {
1008
1009 lv_draw_mask_res_t res1 = LV_DRAW_MASK_RES_FULL_COVER;
1010 lv_draw_mask_res_t res2 = LV_DRAW_MASK_RES_FULL_COVER;
1011
1012 if(p->cfg.start_angle == 180) {
1013 if(abs_y < p->cfg.vertex_p.y) res1 = LV_DRAW_MASK_RES_FULL_COVER;
1014 else res1 = LV_DRAW_MASK_RES_UNKNOWN;
1015 }
1016 else if(p->cfg.start_angle == 0) {
1017 if(abs_y < p->cfg.vertex_p.y) res1 = LV_DRAW_MASK_RES_UNKNOWN;
1018 else res1 = LV_DRAW_MASK_RES_FULL_COVER;
1019 }
1020 else if((p->cfg.start_angle < 180 && abs_y < p->cfg.vertex_p.y) ||
1021 (p->cfg.start_angle > 180 && abs_y >= p->cfg.vertex_p.y)) {
1022 res1 = LV_DRAW_MASK_RES_UNKNOWN;
1023 }
1024 else {
1025 res1 = lv_draw_mask_line(mask_buf, abs_x, abs_y, len, &p->start_line);
1026 }
1027
1028 if(p->cfg.end_angle == 180) {
1029 if(abs_y < p->cfg.vertex_p.y) res2 = LV_DRAW_MASK_RES_UNKNOWN;
1030 else res2 = LV_DRAW_MASK_RES_FULL_COVER;
1031 }
1032 else if(p->cfg.end_angle == 0) {
1033 if(abs_y < p->cfg.vertex_p.y) res2 = LV_DRAW_MASK_RES_FULL_COVER;
1034 else res2 = LV_DRAW_MASK_RES_UNKNOWN;
1035 }
1036 else if((p->cfg.end_angle < 180 && abs_y < p->cfg.vertex_p.y) ||
1037 (p->cfg.end_angle > 180 && abs_y >= p->cfg.vertex_p.y)) {
1038 res2 = LV_DRAW_MASK_RES_UNKNOWN;
1039 }
1040 else {
1041 res2 = lv_draw_mask_line(mask_buf, abs_x, abs_y, len, &p->end_line);
1042 }
1043
1044 if(res1 == LV_DRAW_MASK_RES_TRANSP || res2 == LV_DRAW_MASK_RES_TRANSP) return LV_DRAW_MASK_RES_TRANSP;
1045 else if(res1 == LV_DRAW_MASK_RES_UNKNOWN && res2 == LV_DRAW_MASK_RES_UNKNOWN) return LV_DRAW_MASK_RES_TRANSP;
1046 else if(res1 == LV_DRAW_MASK_RES_FULL_COVER && res2 == LV_DRAW_MASK_RES_FULL_COVER) return LV_DRAW_MASK_RES_FULL_COVER;
1047 else return LV_DRAW_MASK_RES_CHANGED;
1048 }
1049 }
1050
1051
1052
lv_draw_mask_radius(lv_opa_t * mask_buf,lv_coord_t abs_x,lv_coord_t abs_y,lv_coord_t len,lv_draw_mask_radius_param_t * p)1053 LV_ATTRIBUTE_FAST_MEM static lv_draw_mask_res_t lv_draw_mask_radius(lv_opa_t * mask_buf, lv_coord_t abs_x,
1054 lv_coord_t abs_y, lv_coord_t len,
1055 lv_draw_mask_radius_param_t * p)
1056 {
1057 bool outer = p->cfg.outer;
1058 int32_t radius = p->cfg.radius;
1059 lv_area_t rect;
1060 lv_area_copy(&rect, &p->cfg.rect);
1061
1062 if(outer == false) {
1063 if((abs_y < rect.y1 || abs_y > rect.y2)) {
1064 return LV_DRAW_MASK_RES_TRANSP;
1065 }
1066 }
1067 else {
1068 if(abs_y < rect.y1 || abs_y > rect.y2) {
1069 return LV_DRAW_MASK_RES_FULL_COVER;
1070 }
1071 }
1072
1073 if((abs_x >= rect.x1 + radius && abs_x + len <= rect.x2 - radius) ||
1074 (abs_y >= rect.y1 + radius && abs_y <= rect.y2 - radius)) {
1075 if(outer == false) {
1076 /*Remove the edges*/
1077 int32_t last = rect.x1 - abs_x;
1078 if(last > len) return LV_DRAW_MASK_RES_TRANSP;
1079 if(last >= 0) {
1080 lv_memset_00(&mask_buf[0], last);
1081 }
1082
1083 int32_t first = rect.x2 - abs_x + 1;
1084 if(first <= 0) return LV_DRAW_MASK_RES_TRANSP;
1085 else if(first < len) {
1086 lv_memset_00(&mask_buf[first], len - first);
1087 }
1088 if(last == 0 && first == len) return LV_DRAW_MASK_RES_FULL_COVER;
1089 else return LV_DRAW_MASK_RES_CHANGED;
1090 }
1091 else {
1092 int32_t first = rect.x1 - abs_x;
1093 if(first < 0) first = 0;
1094 if(first <= len) {
1095 int32_t last = rect.x2 - abs_x - first + 1;
1096 if(first + last > len) last = len - first;
1097 if(last >= 0) {
1098 lv_memset_00(&mask_buf[first], last);
1099 }
1100 }
1101 }
1102 return LV_DRAW_MASK_RES_CHANGED;
1103 }
1104 // printf("exec: x:%d.. %d, y:%d: r:%d, %s\n", abs_x, abs_x + len - 1, abs_y, p->cfg.radius, p->cfg.outer ? "inv" : "norm");
1105
1106
1107 // if( abs_x == 276 && abs_x + len - 1 == 479 && abs_y == 63 && p->cfg.radius == 5 && p->cfg.outer == 1) {
1108 // char x = 0;
1109 // }
1110 //exec: x:276.. 479, y:63: r:5, inv)
1111
1112 int32_t k = rect.x1 - abs_x; /*First relevant coordinate on the of the mask*/
1113 int32_t w = lv_area_get_width(&rect);
1114 int32_t h = lv_area_get_height(&rect);
1115 abs_x -= rect.x1;
1116 abs_y -= rect.y1;
1117
1118 lv_coord_t aa_len;
1119 lv_coord_t x_start;
1120 lv_coord_t cir_y;
1121 if(abs_y < radius) {
1122 cir_y = radius - abs_y - 1;
1123 }
1124 else {
1125 cir_y = abs_y - (h - radius);
1126 }
1127 lv_opa_t * aa_opa = get_next_line(p->circle, cir_y, &aa_len, &x_start);
1128 lv_coord_t cir_x_right = k + w - radius + x_start;
1129 lv_coord_t cir_x_left = k + radius - x_start - 1;
1130 lv_coord_t i;
1131
1132 if(outer == false) {
1133 for(i = 0; i < aa_len; i++) {
1134 lv_opa_t opa = aa_opa[aa_len - i - 1];
1135 if(cir_x_right + i >= 0 && cir_x_right + i < len) {
1136 mask_buf[cir_x_right + i] = mask_mix(opa, mask_buf[cir_x_right + i]);
1137 }
1138 if(cir_x_left - i >= 0 && cir_x_left - i < len) {
1139 mask_buf[cir_x_left - i] = mask_mix(opa, mask_buf[cir_x_left - i]);
1140 }
1141 }
1142
1143 /*Clean the right side*/
1144 cir_x_right = LV_CLAMP(0, cir_x_right + i, len);
1145 lv_memset_00(&mask_buf[cir_x_right], len - cir_x_right);
1146
1147 /*Clean the left side*/
1148 cir_x_left = LV_CLAMP(0, cir_x_left - aa_len + 1, len);
1149 lv_memset_00(&mask_buf[0], cir_x_left);
1150 }
1151 else {
1152 for(i = 0; i < aa_len; i++) {
1153 lv_opa_t opa = 255 - (aa_opa[aa_len - 1 - i]);
1154 if(cir_x_right + i >= 0 && cir_x_right + i < len) {
1155 mask_buf[cir_x_right + i] = mask_mix(opa, mask_buf[cir_x_right + i]);
1156 }
1157 if(cir_x_left - i >= 0 && cir_x_left - i < len) {
1158 mask_buf[cir_x_left - i] = mask_mix(opa, mask_buf[cir_x_left - i]);
1159 }
1160 }
1161
1162 lv_coord_t clr_start = LV_CLAMP(0, cir_x_left + 1, len);
1163 lv_coord_t clr_len = LV_CLAMP(0, cir_x_right - clr_start, len - clr_start);
1164 lv_memset_00(&mask_buf[clr_start], clr_len);
1165 }
1166
1167 return LV_DRAW_MASK_RES_CHANGED;
1168 }
1169
lv_draw_mask_fade(lv_opa_t * mask_buf,lv_coord_t abs_x,lv_coord_t abs_y,lv_coord_t len,lv_draw_mask_fade_param_t * p)1170 LV_ATTRIBUTE_FAST_MEM static lv_draw_mask_res_t lv_draw_mask_fade(lv_opa_t * mask_buf, lv_coord_t abs_x,
1171 lv_coord_t abs_y, lv_coord_t len,
1172 lv_draw_mask_fade_param_t * p)
1173 {
1174 if(abs_y < p->cfg.coords.y1) return LV_DRAW_MASK_RES_FULL_COVER;
1175 if(abs_y > p->cfg.coords.y2) return LV_DRAW_MASK_RES_FULL_COVER;
1176 if(abs_x + len < p->cfg.coords.x1) return LV_DRAW_MASK_RES_FULL_COVER;
1177 if(abs_x > p->cfg.coords.x2) return LV_DRAW_MASK_RES_FULL_COVER;
1178
1179 if(abs_x + len > p->cfg.coords.x2) len -= abs_x + len - p->cfg.coords.x2 - 1;
1180
1181 if(abs_x < p->cfg.coords.x1) {
1182 int32_t x_ofs = 0;
1183 x_ofs = p->cfg.coords.x1 - abs_x;
1184 len -= x_ofs;
1185 mask_buf += x_ofs;
1186 }
1187
1188 int32_t i;
1189
1190 if(abs_y <= p->cfg.y_top) {
1191 for(i = 0; i < len; i++) {
1192 mask_buf[i] = mask_mix(mask_buf[i], p->cfg.opa_top);
1193 }
1194 return LV_DRAW_MASK_RES_CHANGED;
1195 }
1196 else if(abs_y >= p->cfg.y_bottom) {
1197 for(i = 0; i < len; i++) {
1198 mask_buf[i] = mask_mix(mask_buf[i], p->cfg.opa_bottom);
1199 }
1200 return LV_DRAW_MASK_RES_CHANGED;
1201 }
1202 else {
1203 /*Calculate the opa proportionally*/
1204 int16_t opa_diff = p->cfg.opa_bottom - p->cfg.opa_top;
1205 int32_t y_diff = p->cfg.y_bottom - p->cfg.y_top + 1;
1206 lv_opa_t opa_act = (int32_t)((int32_t)(abs_y - p->cfg.y_top) * opa_diff) / y_diff;
1207 opa_act += p->cfg.opa_top;
1208
1209 for(i = 0; i < len; i++) {
1210 mask_buf[i] = mask_mix(mask_buf[i], opa_act);
1211 }
1212 return LV_DRAW_MASK_RES_CHANGED;
1213 }
1214 }
1215
lv_draw_mask_map(lv_opa_t * mask_buf,lv_coord_t abs_x,lv_coord_t abs_y,lv_coord_t len,lv_draw_mask_map_param_t * p)1216 LV_ATTRIBUTE_FAST_MEM static lv_draw_mask_res_t lv_draw_mask_map(lv_opa_t * mask_buf, lv_coord_t abs_x,
1217 lv_coord_t abs_y, lv_coord_t len,
1218 lv_draw_mask_map_param_t * p)
1219 {
1220 /*Handle out of the mask cases*/
1221 if(abs_y < p->cfg.coords.y1) return LV_DRAW_MASK_RES_FULL_COVER;
1222 if(abs_y > p->cfg.coords.y2) return LV_DRAW_MASK_RES_FULL_COVER;
1223 if(abs_x + len < p->cfg.coords.x1) return LV_DRAW_MASK_RES_FULL_COVER;
1224 if(abs_x > p->cfg.coords.x2) return LV_DRAW_MASK_RES_FULL_COVER;
1225
1226 /*Got to the current row in the map*/
1227 const lv_opa_t * map_tmp = p->cfg.map;
1228 map_tmp += (abs_y - p->cfg.coords.y1) * lv_area_get_width(&p->cfg.coords);
1229
1230 if(abs_x + len > p->cfg.coords.x2) len -= abs_x + len - p->cfg.coords.x2 - 1;
1231
1232 if(abs_x < p->cfg.coords.x1) {
1233 int32_t x_ofs = 0;
1234 x_ofs = p->cfg.coords.x1 - abs_x;
1235 len -= x_ofs;
1236 mask_buf += x_ofs;
1237 }
1238 else {
1239 map_tmp += (abs_x - p->cfg.coords.x1);
1240 }
1241
1242 int32_t i;
1243 for(i = 0; i < len; i++) {
1244 mask_buf[i] = mask_mix(mask_buf[i], map_tmp[i]);
1245 }
1246
1247 return LV_DRAW_MASK_RES_CHANGED;
1248 }
1249
lv_draw_mask_polygon(lv_opa_t * mask_buf,lv_coord_t abs_x,lv_coord_t abs_y,lv_coord_t len,lv_draw_mask_polygon_param_t * param)1250 LV_ATTRIBUTE_FAST_MEM static lv_draw_mask_res_t lv_draw_mask_polygon(lv_opa_t * mask_buf, lv_coord_t abs_x,
1251 lv_coord_t abs_y, lv_coord_t len,
1252 lv_draw_mask_polygon_param_t * param)
1253 {
1254 uint16_t i;
1255 struct {
1256 lv_point_t p1;
1257 lv_point_t p2;
1258 } lines[2], tmp;
1259 uint16_t line_cnt = 0;
1260 lv_memset_00(&lines, sizeof(lines));
1261 int psign_prev = 0;
1262 for(i = 0; i < param->cfg.point_cnt; i++) {
1263 lv_point_t p1 = param->cfg.points[i];
1264 lv_point_t p2 = param->cfg.points[i + 1 < param->cfg.point_cnt ? i + 1 : 0];
1265 int pdiff = p1.y - p2.y, psign = pdiff / LV_ABS(pdiff);
1266 if(pdiff > 0) {
1267 if(abs_y > p1.y || abs_y < p2.y) continue;
1268 lines[line_cnt].p1 = p2;
1269 lines[line_cnt].p2 = p1;
1270 }
1271 else {
1272 if(abs_y < p1.y || abs_y > p2.y) continue;
1273 lines[line_cnt].p1 = p1;
1274 lines[line_cnt].p2 = p2;
1275 }
1276 if(psign_prev && psign_prev == psign) continue;
1277 psign_prev = psign;
1278 line_cnt++;
1279 if(line_cnt == 2) break;
1280 }
1281 if(line_cnt != 2) return LV_DRAW_MASK_RES_TRANSP;
1282 if(lines[0].p1.x > lines[1].p1.x || lines[0].p2.x > lines[1].p2.x) {
1283 tmp = lines[0];
1284 lines[0] = lines[1];
1285 lines[1] = tmp;
1286 }
1287 lv_draw_mask_line_param_t line_p;
1288 lv_draw_mask_line_points_init(&line_p, lines[0].p1.x, lines[0].p1.y, lines[0].p2.x, lines[0].p2.y,
1289 LV_DRAW_MASK_LINE_SIDE_RIGHT);
1290 if(line_p.steep == 0 && line_p.flat) {
1291 lv_coord_t x1 = LV_MIN(lines[0].p1.x, lines[0].p2.x);
1292 lv_coord_t x2 = LV_MAX(lines[0].p1.x, lines[0].p2.x);
1293 for(i = 0; i < len; i++) {
1294 mask_buf[i] = mask_mix(mask_buf[i], (abs_x + i >= x1 && abs_x + i <= x2) * 0xFF);
1295 }
1296 lv_draw_mask_free_param(&line_p);
1297 return LV_DRAW_MASK_RES_CHANGED;
1298 }
1299 lv_draw_mask_res_t res1 = lv_draw_mask_line(mask_buf, abs_x, abs_y, len, &line_p);
1300 lv_draw_mask_free_param(&line_p);
1301 if(res1 == LV_DRAW_MASK_RES_TRANSP) {
1302 return LV_DRAW_MASK_RES_TRANSP;
1303 }
1304 lv_draw_mask_line_points_init(&line_p, lines[1].p1.x, lines[1].p1.y, lines[1].p2.x, lines[1].p2.y,
1305 LV_DRAW_MASK_LINE_SIDE_LEFT);
1306 if(line_p.steep == 0 && line_p.flat) {
1307 lv_coord_t x1 = LV_MIN(lines[1].p1.x, lines[1].p2.x);
1308 lv_coord_t x2 = LV_MAX(lines[1].p1.x, lines[1].p2.x);
1309 for(i = 0; i < len; i++) {
1310 mask_buf[i] = mask_mix(mask_buf[i], (abs_x + i >= x1 && abs_x + i <= x2) * 0xFF);
1311 }
1312 lv_draw_mask_free_param(&line_p);
1313 return LV_DRAW_MASK_RES_CHANGED;
1314 }
1315 lv_draw_mask_res_t res2 = lv_draw_mask_line(mask_buf, abs_x, abs_y, len, &line_p);
1316 lv_draw_mask_free_param(&line_p);
1317 if(res2 == LV_DRAW_MASK_RES_TRANSP) {
1318 return LV_DRAW_MASK_RES_TRANSP;
1319 }
1320 if(res1 == LV_DRAW_MASK_RES_CHANGED || res2 == LV_DRAW_MASK_RES_CHANGED) return LV_DRAW_MASK_RES_CHANGED;
1321 return res1;
1322 }
1323 /**
1324 * Initialize the circle drawing
1325 * @param c pointer to a point. The coordinates will be calculated here
1326 * @param tmp point to a variable. It will store temporary data
1327 * @param radius radius of the circle
1328 */
circ_init(lv_point_t * c,lv_coord_t * tmp,lv_coord_t radius)1329 static void circ_init(lv_point_t * c, lv_coord_t * tmp, lv_coord_t radius)
1330 {
1331 c->x = radius;
1332 c->y = 0;
1333 *tmp = 1 - radius;
1334 }
1335
1336 /**
1337 * Test the circle drawing is ready or not
1338 * @param c same as in circ_init
1339 * @return true if the circle is not ready yet
1340 */
circ_cont(lv_point_t * c)1341 static bool circ_cont(lv_point_t * c)
1342 {
1343 return c->y <= c->x ? true : false;
1344 }
1345
1346 /**
1347 * Get the next point from the circle
1348 * @param c same as in circ_init. The next point stored here.
1349 * @param tmp same as in circ_init.
1350 */
circ_next(lv_point_t * c,lv_coord_t * tmp)1351 static void circ_next(lv_point_t * c, lv_coord_t * tmp)
1352 {
1353
1354 if(*tmp <= 0) {
1355 (*tmp) += 2 * c->y + 3; /*Change in decision criterion for y -> y+1*/
1356 }
1357 else {
1358 (*tmp) += 2 * (c->y - c->x) + 5; /*Change for y -> y+1, x -> x-1*/
1359 c->x--;
1360 }
1361 c->y++;
1362 }
1363
circ_calc_aa4(_lv_draw_mask_radius_circle_dsc_t * c,lv_coord_t radius)1364 static void circ_calc_aa4(_lv_draw_mask_radius_circle_dsc_t * c, lv_coord_t radius)
1365 {
1366 if(radius == 0) return;
1367 c->radius = radius;
1368
1369 /*Allocate buffers*/
1370 if(c->buf) lv_mem_free(c->buf);
1371
1372 c->buf = lv_mem_alloc(radius * 6 + 6); /*Use uint16_t for opa_start_on_y and x_start_on_y*/
1373 LV_ASSERT_MALLOC(c->buf);
1374 c->cir_opa = c->buf;
1375 c->opa_start_on_y = (uint16_t *)(c->buf + 2 * radius + 2);
1376 c->x_start_on_y = (uint16_t *)(c->buf + 4 * radius + 4);
1377
1378 /*Special case, handle manually*/
1379 if(radius == 1) {
1380 c->cir_opa[0] = 180;
1381 c->opa_start_on_y[0] = 0;
1382 c->opa_start_on_y[1] = 1;
1383 c->x_start_on_y[0] = 0;
1384 return;
1385 }
1386
1387 lv_coord_t * cir_x = lv_mem_buf_get((radius + 1) * 2 * 2 * sizeof(lv_coord_t));
1388 lv_coord_t * cir_y = &cir_x[(radius + 1) * 2];
1389
1390 uint32_t y_8th_cnt = 0;
1391 lv_point_t cp;
1392 lv_coord_t tmp;
1393 circ_init(&cp, &tmp, radius * 4); /*Upscale by 4*/
1394 int32_t i;
1395
1396 uint32_t x_int[4];
1397 uint32_t x_fract[4];
1398 lv_coord_t cir_size = 0;
1399 x_int[0] = cp.x >> 2;
1400 x_fract[0] = 0;
1401
1402 /*Calculate an 1/8 circle*/
1403 while(circ_cont(&cp)) {
1404 /*Calculate 4 point of the circle */
1405 for(i = 0; i < 4; i++) {
1406 circ_next(&cp, &tmp);
1407 if(circ_cont(&cp) == false) break;
1408 x_int[i] = cp.x >> 2;
1409 x_fract[i] = cp.x & 0x3;
1410 }
1411 if(i != 4) break;
1412
1413 /*All lines on the same x when downscaled*/
1414 if(x_int[0] == x_int[3]) {
1415 cir_x[cir_size] = x_int[0];
1416 cir_y[cir_size] = y_8th_cnt;
1417 c->cir_opa[cir_size] = x_fract[0] + x_fract[1] + x_fract[2] + x_fract[3];
1418 c->cir_opa[cir_size] *= 16;
1419 cir_size++;
1420 }
1421 /*Second line on new x when downscaled*/
1422 else if(x_int[0] != x_int[1]) {
1423 cir_x[cir_size] = x_int[0];
1424 cir_y[cir_size] = y_8th_cnt;
1425 c->cir_opa[cir_size] = x_fract[0];
1426 c->cir_opa[cir_size] *= 16;
1427 cir_size++;
1428
1429 cir_x[cir_size] = x_int[0] - 1;
1430 cir_y[cir_size] = y_8th_cnt;
1431 c->cir_opa[cir_size] = 1 * 4 + x_fract[1] + x_fract[2] + x_fract[3];;
1432 c->cir_opa[cir_size] *= 16;
1433 cir_size++;
1434 }
1435 /*Third line on new x when downscaled*/
1436 else if(x_int[0] != x_int[2]) {
1437 cir_x[cir_size] = x_int[0];
1438 cir_y[cir_size] = y_8th_cnt;
1439 c->cir_opa[cir_size] = x_fract[0] + x_fract[1];
1440 c->cir_opa[cir_size] *= 16;
1441 cir_size++;
1442
1443 cir_x[cir_size] = x_int[0] - 1;
1444 cir_y[cir_size] = y_8th_cnt;
1445 c->cir_opa[cir_size] = 2 * 4 + x_fract[2] + x_fract[3];;
1446 c->cir_opa[cir_size] *= 16;
1447 cir_size++;
1448 }
1449 /*Forth line on new x when downscaled*/
1450 else {
1451 cir_x[cir_size] = x_int[0];
1452 cir_y[cir_size] = y_8th_cnt;
1453 c->cir_opa[cir_size] = x_fract[0] + x_fract[1] + x_fract[2];
1454 c->cir_opa[cir_size] *= 16;
1455 cir_size++;
1456
1457 cir_x[cir_size] = x_int[0] - 1;
1458 cir_y[cir_size] = y_8th_cnt;
1459 c->cir_opa[cir_size] = 3 * 4 + x_fract[3];;
1460 c->cir_opa[cir_size] *= 16;
1461 cir_size++;
1462 }
1463
1464 y_8th_cnt++;
1465 }
1466
1467 /*The point on the 1/8 circle is special, calculate it manually*/
1468 int32_t mid = radius * 723;
1469 int32_t mid_int = mid >> 10;
1470 if(cir_x[cir_size - 1] != mid_int || cir_y[cir_size - 1] != mid_int) {
1471 int32_t tmp_val = mid - (mid_int << 10);
1472 if(tmp_val <= 512) {
1473 tmp_val = tmp_val * tmp_val * 2;
1474 tmp_val = tmp_val >> (10 + 6);
1475 }
1476 else {
1477 tmp_val = 1024 - tmp_val;
1478 tmp_val = tmp_val * tmp_val * 2;
1479 tmp_val = tmp_val >> (10 + 6);
1480 tmp_val = 15 - tmp_val;
1481 }
1482
1483 cir_x[cir_size] = mid_int;
1484 cir_y[cir_size] = mid_int;
1485 c->cir_opa[cir_size] = tmp_val;
1486 c->cir_opa[cir_size] *= 16;
1487 cir_size++;
1488 }
1489
1490 /*Build the second octet by mirroring the first*/
1491 for(i = cir_size - 2; i >= 0; i--, cir_size++) {
1492 cir_x[cir_size] = cir_y[i];
1493 cir_y[cir_size] = cir_x[i];
1494 c->cir_opa[cir_size] = c->cir_opa[i];
1495 }
1496
1497 lv_coord_t y = 0;
1498 i = 0;
1499 c->opa_start_on_y[0] = 0;
1500 while(i < cir_size) {
1501 c->opa_start_on_y[y] = i;
1502 c->x_start_on_y[y] = cir_x[i];
1503 for(; cir_y[i] == y && i < (int32_t)cir_size; i++) {
1504 c->x_start_on_y[y] = LV_MIN(c->x_start_on_y[y], cir_x[i]);
1505 }
1506 y++;
1507 }
1508
1509 lv_mem_buf_release(cir_x);
1510 }
1511
get_next_line(_lv_draw_mask_radius_circle_dsc_t * c,lv_coord_t y,lv_coord_t * len,lv_coord_t * x_start)1512 static lv_opa_t * get_next_line(_lv_draw_mask_radius_circle_dsc_t * c, lv_coord_t y, lv_coord_t * len,
1513 lv_coord_t * x_start)
1514 {
1515 *len = c->opa_start_on_y[y + 1] - c->opa_start_on_y[y];
1516 *x_start = c->x_start_on_y[y];
1517 return &c->cir_opa[c->opa_start_on_y[y]];
1518 }
1519
1520
mask_mix(lv_opa_t mask_act,lv_opa_t mask_new)1521 LV_ATTRIBUTE_FAST_MEM static inline lv_opa_t mask_mix(lv_opa_t mask_act, lv_opa_t mask_new)
1522 {
1523 if(mask_new >= LV_OPA_MAX) return mask_act;
1524 if(mask_new <= LV_OPA_MIN) return 0;
1525
1526 return LV_UDIV255(mask_act * mask_new);// >> 8);
1527 }
1528
1529
1530 #endif /*LV_DRAW_COMPLEX*/
1531
