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use exif_tag_get_name_in_ifd() everywhere 

exif tag names change with the ids they appear in, so you must always
use exif_tag_get_name_in_ifd(), not exif_tag_get_name()

see: https://github.com/jcupitt/libvips/pull/1030
This commit is contained in:
John Cupitt 2018-07-09 09:35:39 +01:00
parent 274fd7468c
commit d06c2fee22
2 changed files with 24 additions and 7 deletions
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1
ChangeLog
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@ -33,6 +33,7 @@
- add `palette` option to pngsave [felixbuenemann]
- support writing string-valued fields via libexif
- paste in the test suite from pyvips
- get EXIF tag names from tag plus ifd [@Nan619]
12/3/18 started 8.6.4
- better fitting of fonts with overhanging edges [Adrià]

30
libvips/foreign/exif.c
View File

@ -9,6 +9,8 @@
* - remove exif thumbnail if "jpeg-thumbnail-data" has been removed
* 3/7/18
* - add support for writing string-valued fields
* 9/7/18 [@Nan619]
* - get tag name from tag plus ifd
*/
/*
@ -309,6 +311,21 @@ typedef struct _VipsExifParams {
ExifData *ed;
} VipsExifParams;
/* tags do not uniquely set tag names: the same tag can have different
* names in different ifds.
*
* As long as this entry has been linked to an ifd, get the tag name.
*/
static const char *
vips_exif_entry_get_name( ExifEntry *entry )
{
if( !entry->parent )
return( NULL );
return( exif_tag_get_name_in_ifd( entry->tag,
exif_entry_get_ifd( entry ) ) );
}
static void
vips_exif_attach_entry( ExifEntry *entry, VipsExifParams *params )
{
@ -317,9 +334,8 @@ vips_exif_attach_entry( ExifEntry *entry, VipsExifParams *params )
VipsBuf vips_name = VIPS_BUF_STATIC( vips_name_txt );
char value_txt[256];
VipsBuf value = VIPS_BUF_STATIC( value_txt );
ExifIfd ifd = exif_entry_get_ifd( entry );
if( !(tag_name = exif_tag_get_name_in_ifd( entry->tag, ifd )) )
if( !(tag_name = vips_exif_entry_get_name( entry )) )
return;
vips_buf_appendf( &vips_name, "exif-ifd%d-%s",
@ -541,7 +557,7 @@ vips_exif_set_int( ExifData *ed,
offset = component * sizeof_component;
VIPS_DEBUG_MSG( "vips_exif_set_int: %s = %d\n",
exif_tag_get_name( entry->tag ), value );
vips_exif_entry_get_name( entry ), value );
if( entry->format == EXIF_FORMAT_SHORT )
exif_set_short( entry->data + offset, bo, value );
@ -619,7 +635,7 @@ vips_exif_set_rational( ExifData *ed,
offset = component * sizeof_component;
VIPS_DEBUG_MSG( "vips_exif_set_rational: %s = \"%s\"\n",
exif_tag_get_name( entry->tag ), value );
vips_exif_entry_get_name( entry ), value );
if( entry->format == EXIF_FORMAT_RATIONAL ) {
ExifRational rv;
@ -673,7 +689,7 @@ vips_exif_set_double( ExifData *ed,
offset = component * sizeof_component;
VIPS_DEBUG_MSG( "vips_exif_set_double: %s = %g\n",
exif_tag_get_name( entry->tag ), value );
vips_exif_entry_get_name( entry ), value );
if( entry->format == EXIF_FORMAT_RATIONAL ) {
ExifRational rv;
@ -1192,7 +1208,7 @@ vips_exif_exif_entry( ExifEntry *entry, VipsExifRemove *ve )
char vips_name_txt[256];
VipsBuf vips_name = VIPS_BUF_STATIC( vips_name_txt );
if( !(tag_name = exif_tag_get_name( entry->tag )) )
if( !(tag_name = vips_exif_entry_get_name( entry )) )
return;
vips_buf_appendf( &vips_name, "exif-ifd%d-%s",
@ -1230,7 +1246,7 @@ vips_exif_exif_remove( ExifEntry *entry, VipsExifRemove *ve )
char vips_name_txt[256];
VipsBuf vips_name = VIPS_BUF_STATIC( vips_name_txt );
tag_name = exif_tag_get_name( entry->tag );
tag_name = vips_exif_entry_get_name( entry );
vips_buf_appendf( &vips_name, "exif-ifd%d-%s",
exif_entry_get_ifd( entry ), tag_name );