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fix nsgifload metadata 

various issues pointed out by @lovell
This commit is contained in:
John Cupitt 2021-03-28 13:33:16 +01:00
parent cb660b32fe
commit 89c12b0e62
1 changed files with 34 additions and 7 deletions
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41
libvips/foreign/nsgifload.c
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@ -116,7 +116,8 @@ typedef struct _VipsForeignLoadNsgif {
*/
int frame_count_displayable;
/* Delays between frames (in milliseconds). Array of length @n.
/* Delays between frames (in milliseconds). Array of length
* @frame_count_displayable.
*/
int *delay;
@ -284,9 +285,35 @@ vips_foreign_load_nsgif_set_header( VipsForeignLoadNsgif *gif,
VIPS_META_PAGE_HEIGHT, gif->anim->height );
vips_image_set_int( image, VIPS_META_N_PAGES,
gif->frame_count_displayable );
vips_image_set_int( image, "gif-loop", gif->anim->loop_count );
vips_image_set_int( image, "loop", gif->anim->loop_count );
vips_image_set_array_int( image, "delay",
gif->delay, gif->frame_count_displayable );
vips_image_set_array_int( image, "delay", gif->delay, gif->n );
if( gif->anim->global_colours &&
gif->anim->global_colour_table &&
gif->anim->background_index >= 0 &&
gif->anim->background_index < gif->anim->colour_table_size ) {
int index = gif->anim->background_index;
unsigned char *entry = (unsigned char *)
&gif->anim->global_colour_table[index];
double array[3];
array[0] = entry[0];
array[1] = entry[1];
array[2] = entry[2];
vips_image_set_array_double( image, "background", array, 3 );
}
/* DEPRECATED "gif-loop"
*
* Not the correct behavior as loop=1 became gif-loop=0
* but we want to keep the old behavior untouched!
*/
vips_image_set_int( image,
"gif-loop", gif->anim->loop_count == 0 ?
0 : gif->anim->loop_count - 1 );
/* The deprecated gif-delay field is in centiseconds.
*/
@ -371,11 +398,11 @@ vips_foreign_load_nsgif_header( VipsForeignLoad *load )
/* In ms, frame_delay in cs.
*/
VIPS_FREE( gif->delay );
if( !(gif->delay = VIPS_ARRAY( NULL, gif->n, int )) )
if( !(gif->delay = VIPS_ARRAY( NULL,
gif->frame_count_displayable, int )) )
return( -1 );
for( i = 0; i < gif->n; i++ )
gif->delay[i] =
10 * gif->anim->frames[gif->page + i].frame_delay;
for( i = 0; i < gif->frame_count_displayable; i++ )
gif->delay[i] = 10 * gif->anim->frames[i].frame_delay;
gif->gif_delay = gif->anim->frames[0].frame_delay;