Krolyxon
Commit 997c851

Branches

Refs →

nsxivimage.c

812 lines · 17.0 KB · C

Raw Blame History Download
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
445 if (img == NULL || img->im == NULL || img->win == NULL)
446 return;
447
448 win = img->win;
449 img_fit(img);
450
451 if (img->checkpan) {
452 img_check_pan(img, false);
453 img->checkpan = false;
454 }
455
456 if (!img->dirty)
457 return;
458
459 /* calculate source and destination offsets */
460 if (img->x < 0) {
461 sx = -img->x / img->zoom;
462 sw = win->w / img->zoom;
463 dx = 0;
464 dw = win->w;
465 } else {
466 sx = 0;
467 sw = img->w;
468 dx = img->x;
469 dw = img->w * img->zoom;
470 }
471 if (img->y < 0) {
472 sy = -img->y / img->zoom;
473 sh = win->h / img->zoom;
474 dy = 0;
475 dh = win->h;
476 } else {
477 sy = 0;
478 sh = img->h;
479 dy = img->y;
480 dh = img->h * img->zoom;
481 }
482
483 win_clear(win);
484
485 imlib_context_set_image(img->im);
486 imlib_context_set_anti_alias(img->aa);
487
488 if (!img->alpha && imlib_image_has_alpha())
489 win_draw_rect(win, win->pm, dx, dy, dw, dh, True, 0, win->white);
490
491 imlib_context_set_drawable(win->pm);
492 imlib_render_image_part_on_drawable_at_size(sx, sy, sw, sh, dx, dy, dw, dh);
493
494 img->dirty = false;
495}
496
497bool img_fit_win(img_t *img, scalemode_t sm)
498{
499 float oz;
500
501 if (img == NULL || img->im == NULL || img->win == NULL)
502 return false;
503
504 oz = img->zoom;
505 img->scalemode = sm;
506
507 if (img_fit(img)) {
508 img->x = img->win->w / 2 - (img->win->w / 2 - img->x) * img->zoom / oz;
509 img->y = img->win->h / 2 - (img->win->h / 2 - img->y) * img->zoom / oz;
510 img->checkpan = true;
511 return true;
512 } else {
513 return false;
514 }
515}
516
517bool img_zoom(img_t *img, float z)
518{
519 if (img == NULL || img->im == NULL || img->win == NULL)
520 return false;
521
522 z = MAX(z, zoom_min);
523 z = MIN(z, zoom_max);
524
525 img->scalemode = SCALE_ZOOM;
526
527 if (zoomdiff(z, img->zoom) != 0) {
528 img->x = img->win->w / 2 - (img->win->w / 2 - img->x) * z / img->zoom;
529 img->y = img->win->h / 2 - (img->win->h / 2 - img->y) * z / img->zoom;
530 img->zoom = z;
531 img->checkpan = true;
532 img->dirty = true;
533 return true;
534 } else {
535 return false;
536 }
537}
538
539bool img_zoom_in(img_t *img)
540{
541 int i;
542 float z;
543
544 if (img == NULL || img->im == NULL)
545 return false;
546
547 for (i = 1; i < ARRLEN(zoom_levels); i++) {
548 z = zoom_levels[i] / 100.0;
549 if (zoomdiff(z, img->zoom) > 0)
550 return img_zoom(img, z);
551 }
552 return false;
553}
554
555bool img_zoom_out(img_t *img)
556{
557 int i;
558 float z;
559
560 if (img == NULL || img->im == NULL)
561 return false;
562
563 for (i = ARRLEN(zoom_levels) - 2; i >= 0; i--) {
564 z = zoom_levels[i] / 100.0;
565 if (zoomdiff(z, img->zoom) < 0)
566 return img_zoom(img, z);
567 }
568 return false;
569}
570
571bool img_move(img_t *img, float dx, float dy)
572{
573 float ox, oy;
574
575 if (img == NULL || img->im == NULL)
576 return false;
577
578 ox = img->x;
579 oy = img->y;
580
581 img->x += dx;
582 img->y += dy;
583
584 img_check_pan(img, true);
585
586 if (ox != img->x || oy != img->y) {
587 img->dirty = true;
588 return true;
589 } else {
590 return false;
591 }
592}
593
594bool img_pan(img_t *img, direction_t dir, int d)
595{
596 /* d < 0: screen-wise
597 * d = 0: 1/5 of screen
598 * d > 0: num of pixels
599 */
600 float x, y;
601
602 if (img == NULL || img->im == NULL || img->win == NULL)
603 return false;
604
605 if (d > 0) {
606 x = y = MAX(1, (float) d * img->zoom);
607 } else {
608 x = img->win->w / (d < 0 ? 1 : 5);
609 y = img->win->h / (d < 0 ? 1 : 5);
610 }
611
612 switch (dir) {
613 case DIR_LEFT:
614 return img_move(img, x, 0.0);
615 case DIR_RIGHT:
616 return img_move(img, -x, 0.0);
617 case DIR_UP:
618 return img_move(img, 0.0, y);
619 case DIR_DOWN:
620 return img_move(img, 0.0, -y);
621 }
622 return false;
623}
624
625bool img_pan_edge(img_t *img, direction_t dir)
626{
627 int ox, oy;
628
629 if (img == NULL || img->im == NULL || img->win == NULL)
630 return false;
631
632 ox = img->x;
633 oy = img->y;
634
635 switch (dir) {
636 case DIR_LEFT:
637 img->x = 0;
638 break;
639 case DIR_RIGHT:
640 img->x = img->win->w - img->w * img->zoom;
641 break;
642 case DIR_UP:
643 img->y = 0;
644 break;
645 case DIR_DOWN:
646 img->y = img->win->h - img->h * img->zoom;
647 break;
648 }
649
650 img_check_pan(img, true);
651
652 if (ox != img->x || oy != img->y) {
653 img->dirty = true;
654 return true;
655 } else {
656 return false;
657 }
658}
659
660void img_rotate(img_t *img, degree_t d)
661{
662 int i, ox, oy, tmp;
663
664 if (img == NULL || img->im == NULL || img->win == NULL)
665 return;
666
667 imlib_context_set_image(img->im);
668 imlib_image_orientate(d);
669
670 for (i = 0; i < img->multi.cnt; i++) {
671 if (i != img->multi.sel) {
672 imlib_context_set_image(img->multi.frames[i].im);
673 imlib_image_orientate(d);
674 }
675 }
676 if (d == DEGREE_90 || d == DEGREE_270) {
677 ox = d == DEGREE_90 ? img->x : img->win->w - img->x - img->w * img->zoom;
678 oy = d == DEGREE_270 ? img->y : img->win->h - img->y - img->h * img->zoom;
679
680 img->x = oy + (img->win->w - img->win->h) / 2;
681 img->y = ox + (img->win->h - img->win->w) / 2;
682
683 tmp = img->w;
684 img->w = img->h;
685 img->h = tmp;
686 img->checkpan = true;
687 }
688 img->dirty = true;
689}
690
691void img_flip(img_t *img, flipdir_t d)
692{
693 int i;
694 void (*imlib_flip_op[3])(void) = {
695 imlib_image_flip_horizontal,
696 imlib_image_flip_vertical,
697 imlib_image_flip_diagonal
698 };
699
700 d = (d & (FLIP_HORIZONTAL | FLIP_VERTICAL)) - 1;
701
702 if (img == NULL || img->im == NULL || d < 0 || d >= ARRLEN(imlib_flip_op))
703 return;
704
705 imlib_context_set_image(img->im);
706 imlib_flip_op[d]();
707
708 for (i = 0; i < img->multi.cnt; i++) {
709 if (i != img->multi.sel) {
710 imlib_context_set_image(img->multi.frames[i].im);
711 imlib_flip_op[d]();
712 }
713 }
714 img->dirty = true;
715}
716
717void img_toggle_antialias(img_t *img)
718{
719 if (img == NULL || img->im == NULL)
720 return;
721
722 img->aa = !img->aa;
723 imlib_context_set_image(img->im);
724 imlib_context_set_anti_alias(img->aa);
725 img->dirty = true;
726}
727
728bool img_change_gamma(img_t *img, int d)
729{
730 /* d < 0: decrease gamma
731 * d = 0: reset gamma
732 * d > 0: increase gamma
733 */
734 int gamma;
735
736 if (img == NULL || img->im == NULL)
737 return false;
738
739 if (d == 0)
740 gamma = 0;
741 else if (d < 0)
742 gamma = MAX(-GAMMA_RANGE, img->gamma - 1);
743 else
744 gamma = MIN(+GAMMA_RANGE, img->gamma + 1);
745
746 if (img->gamma != gamma) {
747 img->gamma = gamma;
748 img_apply_gamma(img);
749 img->dirty = true;
750 return true;
751 } else {
752 return false;
753 }
754}
755
756bool img_frame_goto(img_t *img, int n)
757{
758 if (img == NULL || img->im == NULL)
759 return false;
760 if (n < 0 || n >= img->multi.cnt || n == img->multi.sel)
761 return false;
762
763 img->multi.sel = n;
764 img->im = img->multi.frames[n].im;
765
766 imlib_context_set_image(img->im);
767 img->w = imlib_image_get_width();
768 img->h = imlib_image_get_height();
769 img->checkpan = true;
770 img->dirty = true;
771
772 return true;
773}
774
775bool img_frame_navigate(img_t *img, int d)
776{
777 if (img == NULL|| img->im == NULL || img->multi.cnt == 0 || d == 0)
778 return false;
779
780 d += img->multi.sel;
781 if (d < 0)
782 d = 0;
783 else if (d >= img->multi.cnt)
784 d = img->multi.cnt - 1;
785
786 return img_frame_goto(img, d);
787}
788
789bool img_frame_animate(img_t *img, bool restart)
790{
791 if (img == NULL || img->im == NULL || img->multi.cnt == 0)
792 return false;
793
794 if (img->multi.sel + 1 >= img->multi.cnt) {
795 if (restart || GIF_LOOP == 1) {
796 img_frame_goto(img, 0);
797 } else if (GIF_LOOP == -1 && img->multi.repeat != 0) {
798 if (img->multi.repeat > 0)
799 img->multi.repeat--;
800 img_frame_goto(img, 0);
801 } else {
802 img->multi.animate = false;
803 return false;
804 }
805 } else if (!restart) {
806 img_frame_goto(img, img->multi.sel + 1);
807 }
808 img->multi.animate = true;
809 img->dirty = true;
810
811 return true;
812}