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fix page-height in gifload

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and add support for "gif-delay" metadata item
This commit is contained in:
John Cupitt 2017-11-21 11:21:27 +00:00
parent 8497840d97
commit d0c7f9d040
1 changed files with 8 additions and 1 deletions
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9
libvips/foreign/gifload.c
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@ -117,6 +117,10 @@ typedef struct _VipsForeignLoadGif {
gboolean has_transparency; gboolean has_transparency;
gboolean has_colour; gboolean has_colour;
/* Delay in ms. We only track a single delay value for the whole file.
*/
int delay;
/* The FILE* we read from. /* The FILE* we read from.
*/ */
FILE *fp; FILE *fp;
@ -553,6 +557,7 @@ vips_foreign_load_gif_page( VipsForeignLoadGif *gif, VipsImage *out )
* transparency. Bit 1 means transparency * transparency. Bit 1 means transparency
* is being set. * is being set.
*/ */
gif->delay = extension[2] | (extension[3] << 8);
gif->transparency = extension[4]; gif->transparency = extension[4];
gif->has_transparency = TRUE; gif->has_transparency = TRUE;
@ -755,7 +760,8 @@ vips_foreign_load_gif_pages( VipsForeignLoadGif *gif, VipsImage **out )
unref_array( frames ); unref_array( frames );
if( n_frames > 1 ) if( n_frames > 1 )
vips_image_set_int( *out, VIPS_META_PAGE_HEIGHT, frame->Ysize ); vips_image_set_int( *out, VIPS_META_PAGE_HEIGHT, t[0]->Ysize );
vips_image_set_int( *out, "gif-delay", gif->delay );
return( 0 ); return( 0 );
} }
@ -853,6 +859,7 @@ vips_foreign_load_gif_init( VipsForeignLoadGif *gif )
{ {
gif->n = 1; gif->n = 1;
gif->transparency = -1; gif->transparency = -1;
gif->delay = 16;
} }
typedef struct _VipsForeignLoadGifFile { typedef struct _VipsForeignLoadGifFile {