Add -A option to force framerate on animated images

image.c

@@ -68,6 +68,7 @@ void img_init(img_t *img, win_t *win)
 	img->alpha = ALPHA_LAYER;
 	img->multi.cap = img->multi.cnt = 0;
 	img->multi.animate = options->animate;
+	img->multi.framedelay = options->framerate > 0 ? 1000 / options->framerate : 0;
 	img->multi.length = 0;
 
 	img->cmod = imlib_create_color_modifier();
@@ -263,6 +264,7 @@ bool img_load_gif(img_t *img, const fileinfo_t *file)
 				                             img->multi.cap * sizeof(img_frame_t));
 			}
 			img->multi.frames[img->multi.cnt].im = im;
+			delay = img->multi.framedelay > 0 ? img->multi.framedelay : delay;
 			img->multi.frames[img->multi.cnt].delay = delay > 0 ? delay : DEF_GIF_DELAY;
 			img->multi.length += img->multi.frames[img->multi.cnt].delay;
 			img->multi.cnt++;

image.h

@@ -35,6 +35,7 @@ typedef struct {
 	int cnt;
 	int sel;
 	bool animate;
+	int framedelay;
 	int length;
 } multi_img_t;
 

options.c

@@ -32,7 +32,7 @@ const options_t *options = (const options_t*) &_options;
 
 void print_usage(void)
 {
-	printf("usage: sxiv [-abcfhioqrtvZ] [-e WID] [-G GAMMA] [-g GEOMETRY] "
+	printf("usage: sxiv [-abcfhioqrtvZ] [-A FRAMERATE] [-e WID] [-G GAMMA] [-g GEOMETRY] "
 	       "[-N NAME] [-n NUM] [-S DELAY] [-s MODE] [-z ZOOM] FILES...\n");
 }
 
@@ -60,6 +60,7 @@ void parse_options(int argc, char **argv)
 	_options.animate = false;
 	_options.gamma = 0;
 	_options.slideshow = 0;
+	_options.framerate = 0;
 
 	_options.fullscreen = false;
 	_options.embed = 0;
@@ -71,7 +72,7 @@ void parse_options(int argc, char **argv)
 	_options.thumb_mode = false;
 	_options.clean_cache = false;
 
-	while ((opt = getopt(argc, argv, "abce:fG:g:hin:N:oqrS:s:tvZz:")) != -1) {
+	while ((opt = getopt(argc, argv, "aA:bce:fG:g:hin:N:oqrS:s:tvZz:")) != -1) {
 		switch (opt) {
 			case '?':
 				print_usage();
@@ -79,6 +80,13 @@ void parse_options(int argc, char **argv)
 			case 'a':
 				_options.animate = true;
 				break;
+			case 'A':
+				_options.animate = true;
+				n = strtol(optarg, &end, 0);
+				if (*end != '\0' || n <= 0)
+					error(EXIT_FAILURE, 0, "Invalid argument for option -A: %s", optarg);
+				_options.framerate = n;
+				break;
 			case 'b':
 				_options.hide_bar = true;
 				break;

options.h

@@ -37,6 +37,7 @@ typedef struct {
 	bool animate;
 	int gamma;
 	int slideshow;
+	int framerate;
 
 	/* window: */
 	bool fullscreen;