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fix gif-loop metadata

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thanks Christian Stocker
This commit is contained in:
John Cupitt 2017-11-21 18:06:49 +00:00
parent 5361903fae
commit 7aed4c04e7
1 changed files with 18 additions and 4 deletions
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22
libvips/foreign/gifload.c
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@ -579,10 +579,24 @@ vips_foreign_load_gif_page( VipsForeignLoadGif *gif, VipsImage *out )
if( ext_code == APPLICATION_EXT_FUNC_CODE &&
extension &&
extension[0] == 11 &&
/* Then 'NETSCAPE2.0', then */
extension[12] == 3 &&
extension[13] == 1 )
gif->loop = extension[14] | (extension[15] << 8);
vips_isprefix( "NETSCAPE2.0",
(const char *) (extension + 1) ) ) {
while( extension != NULL ) {
if( DGifGetExtensionNext( gif->file,
&extension ) == GIF_ERROR ) {
vips_foreign_load_gif_error(
gif );
return( -1 );
}
if( extension &&
extension[0] == 3 &&
extension[1] == 1 ) {
gif->loop = extension[2] |
(extension[3] << 8);
}
}
}
while( extension != NULL ) {
if( DGifGetExtensionNext( gif->file,