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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->zoom = options->zoom;
78 img->zoom = MAX(img->zoom, zoom_min);
79 img->zoom = MIN(img->zoom, zoom_max);
80 img->checkpan = false;
81 img->dirty = false;
82 img->aa = RENDER_ANTI_ALIAS;
83 img->alpha = !RENDER_WHITE_ALPHA;
84 img->multi.cap = img->multi.cnt = 0;
85 img->multi.animate = false;
86 img->multi.length = img->multi.repeat = 0;
87
88 img->cmod = imlib_create_color_modifier();
89 img->gamma = MIN(MAX(options->gamma, -GAMMA_RANGE), GAMMA_RANGE);
90
91 img->ss.on = options->slideshow > 0;
92 img->ss.delay = options->slideshow > 0 ? options->slideshow : SLIDESHOW_DELAY;
93}
94
95void exif_auto_orientate(const fileinfo_t *file)
96{
97 switch (exif_orientation(file)) {
98 case 5:
99 imlib_image_orientate(1);
100 case 2:
101 imlib_image_flip_vertical();
102 break;
103 case 3:
104 imlib_image_orientate(2);
105 break;
106 case 7:
107 imlib_image_orientate(1);
108 case 4:
109 imlib_image_flip_horizontal();
110 break;
111 case 6:
112 imlib_image_orientate(1);
113 break;
114 case 8:
115 imlib_image_orientate(3);
116 break;
117 }
118}
119
120#if HAVE_GIFLIB
121bool img_load_gif(img_t *img, const fileinfo_t *file)
122{
123 GifFileType *gif;
124 GifRowType *rows = NULL;
125 GifRecordType rec;
126 ColorMapObject *cmap;
127 DATA32 bgpixel, *data, *ptr;
128 DATA32 *prev_frame = NULL;
129 Imlib_Image im;
130 int i, j, bg, r, g, b;
131 int x, y, w, h, sw, sh;
132 int px, py, pw, ph;
133 int intoffset[] = { 0, 4, 2, 1 };
134 int intjump[] = { 8, 8, 4, 2 };
135 int transp = -1;
136 unsigned int disposal = 0, prev_disposal = 0;
137 unsigned int delay = 0;
138 bool err = false;
139
140 if (img->multi.cap == 0) {
141 img->multi.cap = 8;
142 img->multi.frames = (img_frame_t*)
143 s_malloc(sizeof(img_frame_t) * img->multi.cap);
144 }
145 img->multi.cnt = img->multi.sel = 0;
146 img->multi.length = img->multi.repeat = 0;
147
148#if defined(GIFLIB_MAJOR) && GIFLIB_MAJOR >= 5
149 gif = DGifOpenFileName(file->path, NULL);
150#else
151 gif = DGifOpenFileName(file->path);
152#endif
153 if (gif == NULL) {
154 warn("could not open gif file: %s", file->name);
155 return false;
156 }
157 bg = gif->SBackGroundColor;
158 sw = gif->SWidth;
159 sh = gif->SHeight;
160 px = py = pw = ph = 0;
161
162 do {
163 if (DGifGetRecordType(gif, &rec) == GIF_ERROR) {
164 err = true;
165 break;
166 }
167 if (rec == EXTENSION_RECORD_TYPE) {
168 int ext_code;
169 GifByteType *ext = NULL;
170
171 DGifGetExtension(gif, &ext_code, &ext);
172 while (ext) {
173 if (ext_code == GRAPHICS_EXT_FUNC_CODE) {
174 if (ext[1] & 1)
175 transp = (int) ext[4];
176 else
177 transp = -1;
178
179 delay = 10 * ((unsigned int) ext[3] << 8 | (unsigned int) ext[2]);
180 if (delay)
181 delay = MAX(delay, MIN_GIF_DELAY);
182
183 disposal = (unsigned int) ext[1] >> 2 & 0x7;
184 } else if (ext_code == APPLICATION_EXT_FUNC_CODE) {
185 if (ext[0] == 11 && memcmp(ext+1, "NETSCAPE2.0", 11) == 0) {
186 DGifGetExtensionNext(gif, &ext);
187 if (ext && ext[0] == 3 && ext[1] == 1)
188 img->multi.repeat = ((int) ext[3] << 8 | (int) ext[2]) - 1;
189 }
190 }
191 ext = NULL;
192 DGifGetExtensionNext(gif, &ext);
193 }
194 } else if (rec == IMAGE_DESC_RECORD_TYPE) {
195 if (DGifGetImageDesc(gif) == GIF_ERROR) {
196 err = true;
197 break;
198 }
199 x = gif->Image.Left;
200 y = gif->Image.Top;
201 w = gif->Image.Width;
202 h = gif->Image.Height;
203
204 rows = (GifRowType*) s_malloc(h * sizeof(GifRowType));
205 for (i = 0; i < h; i++)
206 rows[i] = (GifRowType) s_malloc(w * sizeof(GifPixelType));
207 if (gif->Image.Interlace) {
208 for (i = 0; i < 4; i++) {
209 for (j = intoffset[i]; j < h; j += intjump[i])
210 DGifGetLine(gif, rows[j], w);
211 }
212 } else {
213 for (i = 0; i < h; i++)
214 DGifGetLine(gif, rows[i], w);
215 }
216
217 ptr = data = (DATA32*) s_malloc(sizeof(DATA32) * sw * sh);
218 cmap = gif->Image.ColorMap ? gif->Image.ColorMap : gif->SColorMap;
219 r = cmap->Colors[bg].Red;
220 g = cmap->Colors[bg].Green;
221 b = cmap->Colors[bg].Blue;
222 bgpixel = 0x00ffffff & (r << 16 | g << 8 | b);
223
224 for (i = 0; i < sh; i++) {
225 for (j = 0; j < sw; j++) {
226 if (i < y || i >= y + h || j < x || j >= x + w ||
227 rows[i-y][j-x] == transp)
228 {
229 if (prev_frame != NULL && (prev_disposal != 2 ||
230 i < py || i >= py + ph || j < px || j >= px + pw))
231 {
232 *ptr = prev_frame[i * sw + j];
233 } else {
234 *ptr = bgpixel;
235 }
236 } else {
237 r = cmap->Colors[rows[i-y][j-x]].Red;
238 g = cmap->Colors[rows[i-y][j-x]].Green;
239 b = cmap->Colors[rows[i-y][j-x]].Blue;
240 *ptr = 0xff << 24 | r << 16 | g << 8 | b;
241 }
242 ptr++;
243 }
244 }
245
246 im = imlib_create_image_using_copied_data(sw, sh, data);
247
248 for (i = 0; i < h; i++)
249 free(rows[i]);
250 free(rows);
251 free(data);
252
253 if (im == NULL) {
254 err = true;
255 break;
256 }
257
258 imlib_context_set_image(im);
259 imlib_image_set_format("gif");
260 if (transp >= 0)
261 imlib_image_set_has_alpha(1);
262
263 if (disposal != 3)
264 prev_frame = imlib_image_get_data_for_reading_only();
265 prev_disposal = disposal;
266 px = x, py = y, pw = w, ph = h;
267
268 if (img->multi.cnt == img->multi.cap) {
269 img->multi.cap *= 2;
270 img->multi.frames = (img_frame_t*)
271 s_realloc(img->multi.frames,
272 img->multi.cap * sizeof(img_frame_t));
273 }
274 img->multi.frames[img->multi.cnt].im = im;
275 img->multi.frames[img->multi.cnt].delay = delay ? delay : GIF_DELAY;
276 img->multi.length += img->multi.frames[img->multi.cnt].delay;
277 img->multi.cnt++;
278 }
279 } while (rec != TERMINATE_RECORD_TYPE);
280
281 DGifCloseFile(gif);
282
283 if (err && !file->loaded)
284 warn("corrupted gif file: %s", file->name);
285
286 if (img->multi.cnt > 1) {
287 imlib_context_set_image(img->im);
288 imlib_free_image();
289 img->im = img->multi.frames[0].im;
290 img->multi.animate = GIF_AUTOPLAY;
291 } else if (img->multi.cnt == 1) {
292 imlib_context_set_image(img->multi.frames[0].im);
293 imlib_free_image();
294 img->multi.cnt = 0;
295 img->multi.animate = false;
296 }
297
298 imlib_context_set_image(img->im);
299
300 return !err;
301}
302#endif /* HAVE_GIFLIB */
303
304bool img_load(img_t *img, const fileinfo_t *file)
305{
306 const char *fmt;
307
308 if (img == NULL || file == NULL || file->name == NULL || file->path == NULL)
309 return false;
310
311 if (access(file->path, R_OK) < 0 ||
312 (img->im = imlib_load_image(file->path)) == NULL)
313 {
314 warn("could not open image: %s", file->name);
315 return false;
316 }
317
318 imlib_context_set_image(img->im);
319 imlib_image_set_changes_on_disk();
320
321 if ((fmt = imlib_image_format()) == NULL) {
322 warn("could not open image: %s", file->name);
323 return false;
324 }
325 if (STREQ(fmt, "jpeg"))
326 exif_auto_orientate(file);
327#if HAVE_GIFLIB
328 if (STREQ(fmt, "gif"))
329 img_load_gif(img, file);
330#endif
331
332 img_apply_gamma(img);
333
334 img->w = imlib_image_get_width();
335 img->h = imlib_image_get_height();
336 img->scalemode = options->scalemode;
337 img->re = false;
338 img->checkpan = false;
339 img->dirty = true;
340
341 return true;
342}
343
344void img_close(img_t *img, bool decache)
345{
346 int i;
347
348 if (img == NULL)
349 return;
350
351 if (img->multi.cnt > 0) {
352 for (i = 0; i < img->multi.cnt; i++) {
353 imlib_context_set_image(img->multi.frames[i].im);
354 imlib_free_image();
355 }
356 img->multi.cnt = 0;
357 img->im = NULL;
358 } else if (img->im != NULL) {
359 imlib_context_set_image(img->im);
360 if (decache)
361 imlib_free_image_and_decache();
362 else
363 imlib_free_image();
364 img->im = NULL;
365 }
366
367 if (img->cmod)
368 imlib_context_set_color_modifier(NULL);
369}
370
371void img_check_pan(img_t *img, bool moved)
372{
373 win_t *win;
374 int ox, oy;
375
376 if (img == NULL || img->im == NULL || img->win == NULL)
377 return;
378
379 win = img->win;
380 ox = img->x;
381 oy = img->y;
382
383 if (img->w * img->zoom > win->w) {
384 if (img->x > 0 && img->x + img->w * img->zoom > win->w)
385 img->x = 0;
386 if (img->x < 0 && img->x + img->w * img->zoom < win->w)
387 img->x = win->w - img->w * img->zoom;
388 } else {
389 img->x = (win->w - img->w * img->zoom) / 2;
390 }
391 if (img->h * img->zoom > win->h) {
392 if (img->y > 0 && img->y + img->h * img->zoom > win->h)
393 img->y = 0;
394 if (img->y < 0 && img->y + img->h * img->zoom < win->h)
395 img->y = win->h - img->h * img->zoom;
396 } else {
397 img->y = (win->h - img->h * img->zoom) / 2;
398 }
399
400 if (!moved && (ox != img->x || oy != img->y))
401 img->dirty = true;
402}
403
404bool img_fit(img_t *img)
405{
406 float z, zmax, zw, zh;
407
408 if (img == NULL || img->im == NULL || img->win == NULL)
409 return false;
410 if (img->scalemode == SCALE_ZOOM)
411 return false;
412
413 zmax = img->scalemode == SCALE_DOWN ? 1.0 : zoom_max;
414 zw = (float) img->win->w / (float) img->w;
415 zh = (float) img->win->h / (float) img->h;
416
417 switch (img->scalemode) {
418 case SCALE_WIDTH:
419 z = zw;
420 break;
421 case SCALE_HEIGHT:
422 z = zh;
423 break;
424 default:
425 z = MIN(zw, zh);
426 break;
427 }
428
429 z = MAX(z, zoom_min);
430 z = MIN(z, zmax);
431
432 if (zoomdiff(z, img->zoom) != 0) {
433 img->zoom = z;
434 img->dirty = true;
435 return true;
436 } else {
437 return false;
438 }
439}
440
441void img_render(img_t *img)
442{
443 win_t *win;
444 int sx, sy, sw, sh;
445 int dx, dy, dw, dh;
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->re) {
454 /* rendered for the first time */
455 img->re = true;
456 if (img->zoom * img->w <= win->w)
457 img->x = (win->w - img->w * img->zoom) / 2;
458 else
459 img->x = 0;
460 if (img->zoom * img->h <= win->h)
461 img->y = (win->h - img->h * img->zoom) / 2;
462 else
463 img->y = 0;
464 }
465
466 if (img->checkpan) {
467 img_check_pan(img, false);
468 img->checkpan = false;
469 }
470
471 if (!img->dirty)
472 return;
473
474 /* calculate source and destination offsets */
475 if (img->x < 0) {
476 sx = -img->x / img->zoom;
477 sw = win->w / img->zoom;
478 dx = 0;
479 dw = win->w;
480 } else {
481 sx = 0;
482 sw = img->w;
483 dx = img->x;
484 dw = img->w * img->zoom;
485 }
486 if (img->y < 0) {
487 sy = -img->y / img->zoom;
488 sh = win->h / img->zoom;
489 dy = 0;
490 dh = win->h;
491 } else {
492 sy = 0;
493 sh = img->h;
494 dy = img->y;
495 dh = img->h * img->zoom;
496 }
497
498 win_clear(win);
499
500 imlib_context_set_image(img->im);
501 imlib_context_set_anti_alias(img->aa);
502
503 if (!img->alpha && imlib_image_has_alpha())
504 win_draw_rect(win, win->pm, dx, dy, dw, dh, True, 0, win->white);
505
506 imlib_context_set_drawable(win->pm);
507 imlib_render_image_part_on_drawable_at_size(sx, sy, sw, sh, dx, dy, dw, dh);
508
509 img->dirty = false;
510}
511
512bool img_fit_win(img_t *img, scalemode_t sm)
513{
514 if (img == NULL || img->im == NULL)
515 return false;
516
517 img->scalemode = sm;
518 return img_fit(img);
519}
520
521bool img_center(img_t *img)
522{
523 int ox, oy;
524
525 if (img == NULL || img->im == NULL || img->win == NULL)
526 return false;
527
528 ox = img->x;
529 oy = img->y;
530
531 img->x = (img->win->w - img->w * img->zoom) / 2;
532 img->y = (img->win->h - img->h * img->zoom) / 2;
533
534 if (ox != img->x || oy != img->y) {
535 img->dirty = true;
536 return true;
537 } else {
538 return false;
539 }
540}
541
542bool img_zoom(img_t *img, float z)
543{
544 if (img == NULL || img->im == NULL || img->win == NULL)
545 return false;
546
547 z = MAX(z, zoom_min);
548 z = MIN(z, zoom_max);
549
550 img->scalemode = SCALE_ZOOM;
551
552 if (zoomdiff(z, img->zoom) != 0) {
553 img->x = img->win->w / 2 - (img->win->w / 2 - img->x) * z / img->zoom;
554 img->y = img->win->h / 2 - (img->win->h / 2 - img->y) * z / img->zoom;
555 img->zoom = z;
556 img->checkpan = true;
557 img->dirty = true;
558 return true;
559 } else {
560 return false;
561 }
562}
563
564bool img_zoom_in(img_t *img)
565{
566 int i;
567 float z;
568
569 if (img == NULL || img->im == NULL)
570 return false;
571
572 for (i = 1; i < ARRLEN(zoom_levels); i++) {
573 z = zoom_levels[i] / 100.0;
574 if (zoomdiff(z, img->zoom) > 0)
575 return img_zoom(img, z);
576 }
577 return false;
578}
579
580bool img_zoom_out(img_t *img)
581{
582 int i;
583 float z;
584
585 if (img == NULL || img->im == NULL)
586 return false;
587
588 for (i = ARRLEN(zoom_levels) - 2; i >= 0; i--) {
589 z = zoom_levels[i] / 100.0;
590 if (zoomdiff(z, img->zoom) < 0)
591 return img_zoom(img, z);
592 }
593 return false;
594}
595
596bool img_move(img_t *img, float dx, float dy)
597{
598 float ox, oy;
599
600 if (img == NULL || img->im == NULL)
601 return false;
602
603 ox = img->x;
604 oy = img->y;
605
606 img->x += dx;
607 img->y += dy;
608
609 img_check_pan(img, true);
610
611 if (ox != img->x || oy != img->y) {
612 img->dirty = true;
613 return true;
614 } else {
615 return false;
616 }
617}
618
619bool img_pan(img_t *img, direction_t dir, int d)
620{
621 /* d < 0: screen-wise
622 * d = 0: 1/5 of screen
623 * d > 0: num of pixels
624 */
625 float x, y;
626
627 if (img == NULL || img->im == NULL || img->win == NULL)
628 return false;
629
630 if (d > 0) {
631 x = y = MAX(1, (float) d * img->zoom);
632 } else {
633 x = img->win->w / (d < 0 ? 1 : 5);
634 y = img->win->h / (d < 0 ? 1 : 5);
635 }
636
637 switch (dir) {
638 case DIR_LEFT:
639 return img_move(img, x, 0.0);
640 case DIR_RIGHT:
641 return img_move(img, -x, 0.0);
642 case DIR_UP:
643 return img_move(img, 0.0, y);
644 case DIR_DOWN:
645 return img_move(img, 0.0, -y);
646 }
647 return false;
648}
649
650bool img_pan_edge(img_t *img, direction_t dir)
651{
652 int ox, oy;
653
654 if (img == NULL || img->im == NULL || img->win == NULL)
655 return false;
656
657 ox = img->x;
658 oy = img->y;
659
660 switch (dir) {
661 case DIR_LEFT:
662 img->x = 0;
663 break;
664 case DIR_RIGHT:
665 img->x = img->win->w - img->w * img->zoom;
666 break;
667 case DIR_UP:
668 img->y = 0;
669 break;
670 case DIR_DOWN:
671 img->y = img->win->h - img->h * img->zoom;
672 break;
673 }
674
675 img_check_pan(img, true);
676
677 if (ox != img->x || oy != img->y) {
678 img->dirty = true;
679 return true;
680 } else {
681 return false;
682 }
683}
684
685void img_rotate(img_t *img, degree_t d)
686{
687 int i, ox, oy, tmp;
688
689 if (img == NULL || img->im == NULL || img->win == NULL)
690 return;
691
692 imlib_context_set_image(img->im);
693 imlib_image_orientate(d);
694
695 for (i = 0; i < img->multi.cnt; i++) {
696 if (i != img->multi.sel) {
697 imlib_context_set_image(img->multi.frames[i].im);
698 imlib_image_orientate(d);
699 }
700 }
701 if (d == DEGREE_90 || d == DEGREE_270) {
702 ox = d == DEGREE_90 ? img->x : img->win->w - img->x - img->w * img->zoom;
703 oy = d == DEGREE_270 ? img->y : img->win->h - img->y - img->h * img->zoom;
704
705 img->x = oy + (img->win->w - img->win->h) / 2;
706 img->y = ox + (img->win->h - img->win->w) / 2;
707
708 tmp = img->w;
709 img->w = img->h;
710 img->h = tmp;
711 img->checkpan = true;
712 }
713 img->dirty = true;
714}
715
716void img_flip(img_t *img, flipdir_t d)
717{
718 int i;
719 void (*imlib_flip_op[3])(void) = {
720 imlib_image_flip_horizontal,
721 imlib_image_flip_vertical,
722 imlib_image_flip_diagonal
723 };
724
725 d = (d & (FLIP_HORIZONTAL | FLIP_VERTICAL)) - 1;
726
727 if (img == NULL || img->im == NULL || d < 0 || d >= ARRLEN(imlib_flip_op))
728 return;
729
730 imlib_context_set_image(img->im);
731 imlib_flip_op[d]();
732
733 for (i = 0; i < img->multi.cnt; i++) {
734 if (i != img->multi.sel) {
735 imlib_context_set_image(img->multi.frames[i].im);
736 imlib_flip_op[d]();
737 }
738 }
739 img->dirty = true;
740}
741
742void img_toggle_antialias(img_t *img)
743{
744 if (img == NULL || img->im == NULL)
745 return;
746
747 img->aa = !img->aa;
748 imlib_context_set_image(img->im);
749 imlib_context_set_anti_alias(img->aa);
750 img->dirty = true;
751}
752
753bool img_change_gamma(img_t *img, int d)
754{
755 /* d < 0: decrease gamma
756 * d = 0: reset gamma
757 * d > 0: increase gamma
758 */
759 int gamma;
760
761 if (img == NULL || img->im == NULL)
762 return false;
763
764 if (d == 0)
765 gamma = 0;
766 else if (d < 0)
767 gamma = MAX(-GAMMA_RANGE, img->gamma - 1);
768 else
769 gamma = MIN(+GAMMA_RANGE, img->gamma + 1);
770
771 if (img->gamma != gamma) {
772 img->gamma = gamma;
773 img_apply_gamma(img);
774 img->dirty = true;
775 return true;
776 } else {
777 return false;
778 }
779}
780
781bool img_frame_goto(img_t *img, int n)
782{
783 if (img == NULL || img->im == NULL)
784 return false;
785 if (n < 0 || n >= img->multi.cnt || n == img->multi.sel)
786 return false;
787
788 img->multi.sel = n;
789 img->im = img->multi.frames[n].im;
790
791 imlib_context_set_image(img->im);
792 img->w = imlib_image_get_width();
793 img->h = imlib_image_get_height();
794 img->checkpan = true;
795 img->dirty = true;
796
797 return true;
798}
799
800bool img_frame_navigate(img_t *img, int d)
801{
802 if (img == NULL|| img->im == NULL || img->multi.cnt == 0 || d == 0)
803 return false;
804
805 d += img->multi.sel;
806 if (d < 0)
807 d = 0;
808 else if (d >= img->multi.cnt)
809 d = img->multi.cnt - 1;
810
811 return img_frame_goto(img, d);
812}
813
814bool img_frame_animate(img_t *img, bool restart)
815{
816 if (img == NULL || img->im == NULL || img->multi.cnt == 0)
817 return false;
818
819 if (img->multi.sel + 1 >= img->multi.cnt) {
820 if (restart || GIF_LOOP == 1) {
821 img_frame_goto(img, 0);
822 } else if (GIF_LOOP == -1 && img->multi.repeat != 0) {
823 if (img->multi.repeat > 0)
824 img->multi.repeat--;
825 img_frame_goto(img, 0);
826 } else {
827 img->multi.animate = false;
828 return false;
829 }
830 } else if (!restart) {
831 img_frame_goto(img, img->multi.sel + 1);
832 }
833 img->multi.animate = true;
834 img->dirty = true;
835
836 return true;
837}