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nsxivimage.c

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1/* Copyright 2011, 2012 Bert Muennich
2 *
3 * This file is part of sxiv.
4 *
5 * sxiv is free software; you can redistribute it and/or modify
6 * it under the terms of the GNU General Public License as published
7 * by the Free Software Foundation; either version 2 of the License,
8 * or (at your option) any later version.
9 *
10 * sxiv is distributed in the hope that it will be useful,
11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 * GNU General Public License for more details.
14 *
15 * You should have received a copy of the GNU General Public License
16 * along with sxiv. If not, see <http://www.gnu.org/licenses/>.
17 */
18
19#define _POSIX_C_SOURCE 200112L
20#define _IMAGE_CONFIG
21#define _RENDER_CONFIG
22
23#include <stdlib.h>
24#include <string.h>
25#include <sys/types.h>
26#include <unistd.h>
27
28#if HAVE_GIFLIB
29#include <gif_lib.h>
30enum { MIN_GIF_DELAY = 25 };
31#endif
32
33#include "exif.h"
34#include "image.h"
35#include "options.h"
36#include "util.h"
37#include "config.h"
38
39float zoom_min;
40float zoom_max;
41
42static int zoomdiff(float z1, float z2)
43{
44 return (int) (z1 * 1000.0 - z2 * 1000.0);
45}
46
47static void img_apply_gamma(img_t *img)
48{
49 if (img == NULL || img->im == NULL || img->cmod == NULL)
50 return;
51
52 if (img->gamma == 0) {
53 imlib_context_set_color_modifier(NULL);
54 } else {
55 double range = img->gamma <= 0 ? 1.0 : GAMMA_MAX - 1.0;
56
57 imlib_context_set_color_modifier(img->cmod);
58 imlib_reset_color_modifier();
59 imlib_modify_color_modifier_gamma(1.0 + img->gamma * (range / GAMMA_RANGE));
60 }
61}
62
63void img_init(img_t *img, win_t *win)
64{
65 zoom_min = zoom_levels[0] / 100.0;
66 zoom_max = zoom_levels[ARRLEN(zoom_levels) - 1] / 100.0;
67
68 if (img == NULL || win == NULL)
69 return;
70
71 imlib_context_set_display(win->env.dpy);
72 imlib_context_set_visual(win->env.vis);
73 imlib_context_set_colormap(win->env.cmap);
74
75 img->im = NULL;
76 img->win = win;
77 img->scalemode = options->scalemode;
78 img->zoom = options->zoom;
79 img->zoom = MAX(img->zoom, zoom_min);
80 img->zoom = MIN(img->zoom, zoom_max);
81 img->checkpan = false;
82 img->dirty = false;
83 img->aa = RENDER_ANTI_ALIAS;
84 img->alpha = !RENDER_WHITE_ALPHA;
85 img->multi.cap = img->multi.cnt = 0;
86 img->multi.animate = false;
87 img->multi.length = img->multi.repeat = 0;
88
89 img->cmod = imlib_create_color_modifier();
90 img->gamma = MIN(MAX(options->gamma, -GAMMA_RANGE), GAMMA_RANGE);
91
92 img->ss.on = options->slideshow > 0;
93 img->ss.delay = options->slideshow > 0 ? options->slideshow : SLIDESHOW_DELAY;
94}
95
96void exif_auto_orientate(const fileinfo_t *file)
97{
98 switch (exif_orientation(file)) {
99 case 5:
100 imlib_image_orientate(1);
101 case 2:
102 imlib_image_flip_vertical();
103 break;
104 case 3:
105 imlib_image_orientate(2);
106 break;
107 case 7:
108 imlib_image_orientate(1);
109 case 4:
110 imlib_image_flip_horizontal();
111 break;
112 case 6:
113 imlib_image_orientate(1);
114 break;
115 case 8:
116 imlib_image_orientate(3);
117 break;
118 }
119}
120
121#if HAVE_GIFLIB
122bool img_load_gif(img_t *img, const fileinfo_t *file)
123{
124 GifFileType *gif;
125 GifRowType *rows = NULL;
126 GifRecordType rec;
127 ColorMapObject *cmap;
128 DATA32 bgpixel, *data, *ptr;
129 DATA32 *prev_frame = NULL;
130 Imlib_Image im;
131 int i, j, bg, r, g, b;
132 int x, y, w, h, sw, sh;
133 int px, py, pw, ph;
134 int intoffset[] = { 0, 4, 2, 1 };
135 int intjump[] = { 8, 8, 4, 2 };
136 int transp = -1;
137 unsigned int disposal = 0, prev_disposal = 0;
138 unsigned int delay = 0;
139 bool err = false;
140
141 if (img->multi.cap == 0) {
142 img->multi.cap = 8;
143 img->multi.frames = (img_frame_t*)
144 s_malloc(sizeof(img_frame_t) * img->multi.cap);
145 }
146 img->multi.cnt = img->multi.sel = 0;
147 img->multi.length = img->multi.repeat = 0;
148
149#if defined(GIFLIB_MAJOR) && GIFLIB_MAJOR >= 5
150 gif = DGifOpenFileName(file->path, NULL);
151#else
152 gif = DGifOpenFileName(file->path);
153#endif
154 if (gif == NULL) {
155 warn("could not open gif file: %s", file->name);
156 return false;
157 }
158 bg = gif->SBackGroundColor;
159 sw = gif->SWidth;
160 sh = gif->SHeight;
161 px = py = pw = ph = 0;
162
163 do {
164 if (DGifGetRecordType(gif, &rec) == GIF_ERROR) {
165 err = true;
166 break;
167 }
168 if (rec == EXTENSION_RECORD_TYPE) {
169 int ext_code;
170 GifByteType *ext = NULL;
171
172 DGifGetExtension(gif, &ext_code, &ext);
173 while (ext) {
174 if (ext_code == GRAPHICS_EXT_FUNC_CODE) {
175 if (ext[1] & 1)
176 transp = (int) ext[4];
177 else
178 transp = -1;
179
180 delay = 10 * ((unsigned int) ext[3] << 8 | (unsigned int) ext[2]);
181 if (delay)
182 delay = MAX(delay, MIN_GIF_DELAY);
183
184 disposal = (unsigned int) ext[1] >> 2 & 0x7;
185 } else if (ext_code == APPLICATION_EXT_FUNC_CODE) {
186 if (ext[0] == 11 && memcmp(ext+1, "NETSCAPE2.0", 11) == 0) {
187 DGifGetExtensionNext(gif, &ext);
188 if (ext && ext[0] == 3 && ext[1] == 1)
189 img->multi.repeat = ((int) ext[3] << 8 | (int) ext[2]) - 1;
190 }
191 }
192 ext = NULL;
193 DGifGetExtensionNext(gif, &ext);
194 }
195 } else if (rec == IMAGE_DESC_RECORD_TYPE) {
196 if (DGifGetImageDesc(gif) == GIF_ERROR) {
197 err = true;
198 break;
199 }
200 x = gif->Image.Left;
201 y = gif->Image.Top;
202 w = gif->Image.Width;
203 h = gif->Image.Height;
204
205 rows = (GifRowType*) s_malloc(h * sizeof(GifRowType));
206 for (i = 0; i < h; i++)
207 rows[i] = (GifRowType) s_malloc(w * sizeof(GifPixelType));
208 if (gif->Image.Interlace) {
209 for (i = 0; i < 4; i++) {
210 for (j = intoffset[i]; j < h; j += intjump[i])
211 DGifGetLine(gif, rows[j], w);
212 }
213 } else {
214 for (i = 0; i < h; i++)
215 DGifGetLine(gif, rows[i], w);
216 }
217
218 ptr = data = (DATA32*) s_malloc(sizeof(DATA32) * sw * sh);
219 cmap = gif->Image.ColorMap ? gif->Image.ColorMap : gif->SColorMap;
220 r = cmap->Colors[bg].Red;
221 g = cmap->Colors[bg].Green;
222 b = cmap->Colors[bg].Blue;
223 bgpixel = 0x00ffffff & (r << 16 | g << 8 | b);
224
225 for (i = 0; i < sh; i++) {
226 for (j = 0; j < sw; j++) {
227 if (i < y || i >= y + h || j < x || j >= x + w ||
228 rows[i-y][j-x] == transp)
229 {
230 if (prev_frame != NULL && (prev_disposal != 2 ||
231 i < py || i >= py + ph || j < px || j >= px + pw))
232 {
233 *ptr = prev_frame[i * sw + j];
234 } else {
235 *ptr = bgpixel;
236 }
237 } else {
238 r = cmap->Colors[rows[i-y][j-x]].Red;
239 g = cmap->Colors[rows[i-y][j-x]].Green;
240 b = cmap->Colors[rows[i-y][j-x]].Blue;
241 *ptr = 0xff << 24 | r << 16 | g << 8 | b;
242 }
243 ptr++;
244 }
245 }
246
247 im = imlib_create_image_using_copied_data(sw, sh, data);
248
249 for (i = 0; i < h; i++)
250 free(rows[i]);
251 free(rows);
252 free(data);
253
254 if (im == NULL) {
255 err = true;
256 break;
257 }
258
259 imlib_context_set_image(im);
260 imlib_image_set_format("gif");
261 if (transp >= 0)
262 imlib_image_set_has_alpha(1);
263
264 if (disposal != 3)
265 prev_frame = imlib_image_get_data_for_reading_only();
266 prev_disposal = disposal;
267 px = x, py = y, pw = w, ph = h;
268
269 if (img->multi.cnt == img->multi.cap) {
270 img->multi.cap *= 2;
271 img->multi.frames = (img_frame_t*)
272 s_realloc(img->multi.frames,
273 img->multi.cap * sizeof(img_frame_t));
274 }
275 img->multi.frames[img->multi.cnt].im = im;
276 img->multi.frames[img->multi.cnt].delay = delay ? delay : GIF_DELAY;
277 img->multi.length += img->multi.frames[img->multi.cnt].delay;
278 img->multi.cnt++;
279 }
280 } while (rec != TERMINATE_RECORD_TYPE);
281
282 DGifCloseFile(gif);
283
284 if (err && !file->loaded)
285 warn("corrupted gif file: %s", file->name);
286
287 if (img->multi.cnt > 1) {
288 imlib_context_set_image(img->im);
289 imlib_free_image();
290 img->im = img->multi.frames[0].im;
291 img->multi.animate = GIF_AUTOPLAY;
292 } else if (img->multi.cnt == 1) {
293 imlib_context_set_image(img->multi.frames[0].im);
294 imlib_free_image();
295 img->multi.cnt = 0;
296 img->multi.animate = false;
297 }
298
299 imlib_context_set_image(img->im);
300
301 return !err;
302}
303#endif /* HAVE_GIFLIB */
304
305bool img_load(img_t *img, const fileinfo_t *file)
306{
307 const char *fmt;
308
309 if (img == NULL || file == NULL || file->name == NULL || file->path == NULL)
310 return false;
311
312 if (access(file->path, R_OK) < 0 ||
313 (img->im = imlib_load_image(file->path)) == NULL)
314 {
315 warn("could not open image: %s", file->name);
316 return false;
317 }
318
319 imlib_context_set_image(img->im);
320 imlib_image_set_changes_on_disk();
321
322 if ((fmt = imlib_image_format()) == NULL) {
323 warn("could not open image: %s", file->name);
324 return false;
325 }
326 if (STREQ(fmt, "jpeg"))
327 exif_auto_orientate(file);
328#if HAVE_GIFLIB
329 if (STREQ(fmt, "gif"))
330 img_load_gif(img, file);
331#endif
332
333 img_apply_gamma(img);
334
335 img->w = imlib_image_get_width();
336 img->h = imlib_image_get_height();
337 img->checkpan = true;
338 img->dirty = true;
339
340 return true;
341}
342
343void img_close(img_t *img, bool decache)
344{
345 int i;
346
347 if (img == NULL)
348 return;
349
350 if (img->multi.cnt > 0) {
351 for (i = 0; i < img->multi.cnt; i++) {
352 imlib_context_set_image(img->multi.frames[i].im);
353 imlib_free_image();
354 }
355 img->multi.cnt = 0;
356 img->im = NULL;
357 } else if (img->im != NULL) {
358 imlib_context_set_image(img->im);
359 if (decache)
360 imlib_free_image_and_decache();
361 else
362 imlib_free_image();
363 img->im = NULL;
364 }
365
366 if (img->cmod)
367 imlib_context_set_color_modifier(NULL);
368}
369
370void img_check_pan(img_t *img, bool moved)
371{
372 win_t *win;
373 int ox, oy;
374 float w, h;
375
376 if (img == NULL || img->im == NULL || img->win == NULL)
377 return;
378
379 win = img->win;
380 w = img->w * img->zoom;
381 h = img->h * img->zoom;
382 ox = img->x;
383 oy = img->y;
384
385 if (w < win->w)
386 img->x = (win->w - w) / 2;
387 else if (img->x > 0)
388 img->x = 0;
389 else if (img->x + w < win->w)
390 img->x = win->w - w;
391 if (h < win->h)
392 img->y = (win->h - h) / 2;
393 else if (img->y > 0)
394 img->y = 0;
395 else if (img->y + h < win->h)
396 img->y = win->h - h;
397
398 if (!moved && (ox != img->x || oy != img->y))
399 img->dirty = true;
400}
401
402bool img_fit(img_t *img)
403{
404 float z, zmax, zw, zh;
405
406 if (img == NULL || img->im == NULL || img->win == NULL)
407 return false;
408 if (img->scalemode == SCALE_ZOOM)
409 return false;
410
411 zmax = img->scalemode == SCALE_DOWN ? 1.0 : zoom_max;
412 zw = (float) img->win->w / (float) img->w;
413 zh = (float) img->win->h / (float) img->h;
414
415 switch (img->scalemode) {
416 case SCALE_WIDTH:
417 z = zw;
418 break;
419 case SCALE_HEIGHT:
420 z = zh;
421 break;
422 default:
423 z = MIN(zw, zh);
424 break;
425 }
426
427 z = MAX(z, zoom_min);
428 z = MIN(z, zmax);
429
430 if (zoomdiff(z, img->zoom) != 0) {
431 img->zoom = z;
432 img->dirty = true;
433 return true;
434 } else {
435 return false;
436 }
437}
438
439void img_render(img_t *img)
440{
441 win_t *win;
442 int sx, sy, sw, sh;
443 int dx, dy, dw, dh;
444 Imlib_Image bg;
445 unsigned long c;
446
447 if (img == NULL || img->im == NULL || img->win == NULL)
448 return;
449
450 win = img->win;
451 img_fit(img);
452
453 if (img->checkpan) {
454 img_check_pan(img, false);
455 img->checkpan = false;
456 }
457
458 if (!img->dirty)
459 return;
460
461 /* calculate source and destination offsets:
462 * - part of image drawn on full window, or
463 * - full image drawn on part of window
464 */
465 if (img->x <= 0) {
466 sx = -img->x / img->zoom;
467 sw = win->w / img->zoom;
468 dx = 0;
469 dw = win->w;
470 } else {
471 sx = 0;
472 sw = img->w;
473 dx = img->x;
474 dw = img->w * img->zoom;
475 }
476 if (img->y <= 0) {
477 sy = -img->y / img->zoom;
478 sh = win->h / img->zoom;
479 dy = 0;
480 dh = win->h;
481 } else {
482 sy = 0;
483 sh = img->h;
484 dy = img->y;
485 dh = img->h * img->zoom;
486 }
487
488 win_clear(win);
489
490 imlib_context_set_image(img->im);
491 imlib_context_set_anti_alias(img->aa);
492 imlib_context_set_drawable(win->pm);
493
494 if (imlib_image_has_alpha()) {
495 if ((bg = imlib_create_image(dw, dh)) == NULL)
496 die("could not allocate memory");
497 imlib_context_set_image(bg);
498 imlib_image_set_has_alpha(0);
499
500 if (img->alpha)
501 c = win->fullscreen ? win->fscol : win->bgcol;
502 else
503 c = win->white;
504 imlib_context_set_color(c >> 16 & 0xFF, c >> 8 & 0xFF, c & 0xFF, 0xFF);
505 imlib_image_fill_rectangle(0, 0, dw, dh);
506
507 imlib_blend_image_onto_image(img->im, 0, sx, sy, sw, sh, 0, 0, dw, dh);
508 imlib_context_set_color_modifier(NULL);
509 imlib_render_image_on_drawable(dx, dy);
510
511 imlib_free_image();
512 if (img->gamma != 0)
513 imlib_context_set_color_modifier(img->cmod);
514 } else {
515 imlib_render_image_part_on_drawable_at_size(sx, sy, sw, sh, dx, dy, dw, dh);
516 }
517 img->dirty = false;
518}
519
520bool img_fit_win(img_t *img, scalemode_t sm)
521{
522 float oz;
523
524 if (img == NULL || img->im == NULL || img->win == NULL)
525 return false;
526
527 oz = img->zoom;
528 img->scalemode = sm;
529
530 if (img_fit(img)) {
531 img->x = img->win->w / 2 - (img->win->w / 2 - img->x) * img->zoom / oz;
532 img->y = img->win->h / 2 - (img->win->h / 2 - img->y) * img->zoom / oz;
533 img->checkpan = true;
534 return true;
535 } else {
536 return false;
537 }
538}
539
540bool img_zoom(img_t *img, float z)
541{
542 if (img == NULL || img->im == NULL || img->win == NULL)
543 return false;
544
545 z = MAX(z, zoom_min);
546 z = MIN(z, zoom_max);
547
548 img->scalemode = SCALE_ZOOM;
549
550 if (zoomdiff(z, img->zoom) != 0) {
551 img->x = img->win->w / 2 - (img->win->w / 2 - img->x) * z / img->zoom;
552 img->y = img->win->h / 2 - (img->win->h / 2 - img->y) * z / img->zoom;
553 img->zoom = z;
554 img->checkpan = true;
555 img->dirty = true;
556 return true;
557 } else {
558 return false;
559 }
560}
561
562bool img_zoom_in(img_t *img)
563{
564 int i;
565 float z;
566
567 if (img == NULL || img->im == NULL)
568 return false;
569
570 for (i = 1; i < ARRLEN(zoom_levels); i++) {
571 z = zoom_levels[i] / 100.0;
572 if (zoomdiff(z, img->zoom) > 0)
573 return img_zoom(img, z);
574 }
575 return false;
576}
577
578bool img_zoom_out(img_t *img)
579{
580 int i;
581 float z;
582
583 if (img == NULL || img->im == NULL)
584 return false;
585
586 for (i = ARRLEN(zoom_levels) - 2; i >= 0; i--) {
587 z = zoom_levels[i] / 100.0;
588 if (zoomdiff(z, img->zoom) < 0)
589 return img_zoom(img, z);
590 }
591 return false;
592}
593
594bool img_move(img_t *img, float dx, float dy)
595{
596 float ox, oy;
597
598 if (img == NULL || img->im == NULL)
599 return false;
600
601 ox = img->x;
602 oy = img->y;
603
604 img->x += dx;
605 img->y += dy;
606
607 img_check_pan(img, true);
608
609 if (ox != img->x || oy != img->y) {
610 img->dirty = true;
611 return true;
612 } else {
613 return false;
614 }
615}
616
617bool img_pan(img_t *img, direction_t dir, int d)
618{
619 /* d < 0: screen-wise
620 * d = 0: 1/5 of screen
621 * d > 0: num of pixels
622 */
623 float x, y;
624
625 if (img == NULL || img->im == NULL || img->win == NULL)
626 return false;
627
628 if (d > 0) {
629 x = y = MAX(1, (float) d * img->zoom);
630 } else {
631 x = img->win->w / (d < 0 ? 1 : 5);
632 y = img->win->h / (d < 0 ? 1 : 5);
633 }
634
635 switch (dir) {
636 case DIR_LEFT:
637 return img_move(img, x, 0.0);
638 case DIR_RIGHT:
639 return img_move(img, -x, 0.0);
640 case DIR_UP:
641 return img_move(img, 0.0, y);
642 case DIR_DOWN:
643 return img_move(img, 0.0, -y);
644 }
645 return false;
646}
647
648bool img_pan_edge(img_t *img, direction_t dir)
649{
650 int ox, oy;
651
652 if (img == NULL || img->im == NULL || img->win == NULL)
653 return false;
654
655 ox = img->x;
656 oy = img->y;
657
658 switch (dir) {
659 case DIR_LEFT:
660 img->x = 0;
661 break;
662 case DIR_RIGHT:
663 img->x = img->win->w - img->w * img->zoom;
664 break;
665 case DIR_UP:
666 img->y = 0;
667 break;
668 case DIR_DOWN:
669 img->y = img->win->h - img->h * img->zoom;
670 break;
671 }
672
673 img_check_pan(img, true);
674
675 if (ox != img->x || oy != img->y) {
676 img->dirty = true;
677 return true;
678 } else {
679 return false;
680 }
681}
682
683void img_rotate(img_t *img, degree_t d)
684{
685 int i, ox, oy, tmp;
686
687 if (img == NULL || img->im == NULL || img->win == NULL)
688 return;
689
690 imlib_context_set_image(img->im);
691 imlib_image_orientate(d);
692
693 for (i = 0; i < img->multi.cnt; i++) {
694 if (i != img->multi.sel) {
695 imlib_context_set_image(img->multi.frames[i].im);
696 imlib_image_orientate(d);
697 }
698 }
699 if (d == DEGREE_90 || d == DEGREE_270) {
700 ox = d == DEGREE_90 ? img->x : img->win->w - img->x - img->w * img->zoom;
701 oy = d == DEGREE_270 ? img->y : img->win->h - img->y - img->h * img->zoom;
702
703 img->x = oy + (img->win->w - img->win->h) / 2;
704 img->y = ox + (img->win->h - img->win->w) / 2;
705
706 tmp = img->w;
707 img->w = img->h;
708 img->h = tmp;
709 img->checkpan = true;
710 }
711 img->dirty = true;
712}
713
714void img_flip(img_t *img, flipdir_t d)
715{
716 int i;
717 void (*imlib_flip_op[3])(void) = {
718 imlib_image_flip_horizontal,
719 imlib_image_flip_vertical,
720 imlib_image_flip_diagonal
721 };
722
723 d = (d & (FLIP_HORIZONTAL | FLIP_VERTICAL)) - 1;
724
725 if (img == NULL || img->im == NULL || d < 0 || d >= ARRLEN(imlib_flip_op))
726 return;
727
728 imlib_context_set_image(img->im);
729 imlib_flip_op[d]();
730
731 for (i = 0; i < img->multi.cnt; i++) {
732 if (i != img->multi.sel) {
733 imlib_context_set_image(img->multi.frames[i].im);
734 imlib_flip_op[d]();
735 }
736 }
737 img->dirty = true;
738}
739
740void img_toggle_antialias(img_t *img)
741{
742 if (img == NULL || img->im == NULL)
743 return;
744
745 img->aa = !img->aa;
746 imlib_context_set_image(img->im);
747 imlib_context_set_anti_alias(img->aa);
748 img->dirty = true;
749}
750
751bool img_change_gamma(img_t *img, int d)
752{
753 /* d < 0: decrease gamma
754 * d = 0: reset gamma
755 * d > 0: increase gamma
756 */
757 int gamma;
758
759 if (img == NULL || img->im == NULL)
760 return false;
761
762 if (d == 0)
763 gamma = 0;
764 else if (d < 0)
765 gamma = MAX(-GAMMA_RANGE, img->gamma - 1);
766 else
767 gamma = MIN(+GAMMA_RANGE, img->gamma + 1);
768
769 if (img->gamma != gamma) {
770 img->gamma = gamma;
771 img_apply_gamma(img);
772 img->dirty = true;
773 return true;
774 } else {
775 return false;
776 }
777}
778
779bool img_frame_goto(img_t *img, int n)
780{
781 if (img == NULL || img->im == NULL)
782 return false;
783 if (n < 0 || n >= img->multi.cnt || n == img->multi.sel)
784 return false;
785
786 img->multi.sel = n;
787 img->im = img->multi.frames[n].im;
788
789 imlib_context_set_image(img->im);
790 img->w = imlib_image_get_width();
791 img->h = imlib_image_get_height();
792 img->checkpan = true;
793 img->dirty = true;
794
795 return true;
796}
797
798bool img_frame_navigate(img_t *img, int d)
799{
800 if (img == NULL|| img->im == NULL || img->multi.cnt == 0 || d == 0)
801 return false;
802
803 d += img->multi.sel;
804 if (d < 0)
805 d = 0;
806 else if (d >= img->multi.cnt)
807 d = img->multi.cnt - 1;
808
809 return img_frame_goto(img, d);
810}
811
812bool img_frame_animate(img_t *img, bool restart)
813{
814 if (img == NULL || img->im == NULL || img->multi.cnt == 0)
815 return false;
816
817 if (img->multi.sel + 1 >= img->multi.cnt) {
818 if (restart || GIF_LOOP == 1) {
819 img_frame_goto(img, 0);
820 } else if (GIF_LOOP == -1 && img->multi.repeat != 0) {
821 if (img->multi.repeat > 0)
822 img->multi.repeat--;
823 img_frame_goto(img, 0);
824 } else {
825 img->multi.animate = false;
826 return false;
827 }
828 } else if (!restart) {
829 img_frame_goto(img, img->multi.sel + 1);
830 }
831 img->multi.animate = true;
832 img->dirty = true;
833
834 return true;
835}