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Read GIF's repeat information from file.

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This commit is contained in:
Aleksander Nitecki 2013-12-30 23:16:17 +01:00
parent 99dfd14919
commit 078136d217
3 changed files with 26 additions and 3 deletions
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2
config.def.h
View file

@ -43,7 +43,7 @@ static const float zoom_levels[] = {
enum {
GIF_DELAY = 100, /* delay time (in ms) */
GIF_AUTOPLAY = 1, /* autoplay when loaded [0/1] */
GIF_LOOP = 0 /* endless loop [0/1] */
GIF_LOOP = -1 /* endless loop [0 / 1 / -1=as specified in file] */
};
/* gamma correction: the user-visible ranges [-GAMMA_RANGE, 0] and

25
image.c
View file

@ -83,6 +83,8 @@ void img_init(img_t *img, win_t *win)
img->alpha = !RENDER_WHITE_ALPHA;
img->multi.cap = img->multi.cnt = 0;
img->multi.animate = false;
img->multi.anim_repeats = -1;
img->multi.repeats_currently_left = 0;
img->cmod = imlib_create_color_modifier();
img->gamma = MIN(MAX(options->gamma, -GAMMA_RANGE), GAMMA_RANGE);
@ -144,6 +146,8 @@ bool img_load_gif(img_t *img, const fileinfo_t *file)
}
img->multi.cnt = 0;
img->multi.sel = 0;
img->multi.anim_repeats = -1;
img->multi.repeats_currently_left = 0;
#if defined(GIFLIB_MAJOR) && GIFLIB_MAJOR >= 5
gif = DGifOpenFileName(file->path, NULL);
@ -170,7 +174,7 @@ bool img_load_gif(img_t *img, const fileinfo_t *file)
DGifGetExtension(gif, &ext_code, &ext);
while (ext) {
if (ext_code == 0xf9) {
if (ext_code == 0xf9) { /*Graphics Control Extension*/
if (ext[1] & 1)
transp = (int) ext[4];
else
@ -181,6 +185,16 @@ bool img_load_gif(img_t *img, const fileinfo_t *file)
delay = MAX(delay, MIN_GIF_DELAY);
disposal = (unsigned int) ext[1] >> 2 & 0x7;
} else if (ext_code == 0xff) { /*Application Extension*/
if(ext[0] == 11 && memcmp(ext+1, "NETSCAPE2.0", 11) == 0) {
DGifGetExtensionNext(gif, &ext);
if(ext && ext[0] == 3 && ext[1] == 1) {
img->multi.repeats_currently_left =
img->multi.anim_repeats =
((unsigned int) ext[3] << 8 | (unsigned int) ext[2]);
}
}
}
ext = NULL;
DGifGetExtensionNext(gif, &ext);
@ -797,8 +811,15 @@ bool img_frame_animate(img_t *img, bool restart)
return false;
if (img->multi.sel + 1 >= img->multi.cnt) {
if (restart || GIF_LOOP) {
if (GIF_LOOP == 1 || (GIF_LOOP == -1 && img->multi.anim_repeats == 0) ) {
img_frame_goto(img, 0);
} else if(restart) {
img_frame_goto(img, 0);
img->multi.repeats_currently_left =
(img->multi.anim_repeats != -1 ? img->multi.anim_repeats : 0);
} else if(GIF_LOOP == -1 && img->multi.repeats_currently_left != 0) {
img_frame_goto(img, 0);
--img->multi.repeats_currently_left;
} else {
img->multi.animate = false;
return false;

2
image.h
View file

@ -35,6 +35,8 @@ typedef struct {
int cnt;
int sel;
bool animate;
int anim_repeats; // -1=don't repeat, 0=repeat infinitely, N=repeat N times
unsigned int repeats_currently_left;
} multi_img_t;
typedef struct {