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revise xmp in png

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back to blob again
This commit is contained in:
John Cupitt 2018-11-23 17:20:05 +00:00
parent cff4af34ca
commit b2325697c3
4 changed files with 27 additions and 13 deletions
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2
libvips/foreign/analyze2vips.c
View File

@ -241,7 +241,7 @@ getstr( int mx, const char *str )
g_assert( mx < 256 );
strncpy( buf, str, mx );
vips_strncpy( buf, str, mx );
buf[mx]= '\0';
/* How annoying, patient_id has some funny ctrlchars in that mess up

35
libvips/foreign/vipspng.c
View File

@ -71,8 +71,6 @@
* - support png8 palette write with palette, colours, Q, dither
* 25/8/18
* - support xmp read/write
* 21/11/18
* - save xmp as string, not blob
*/
/*
@ -277,18 +275,25 @@ vips__set_text( VipsImage *out, int i, const char *key, const char *text )
{
char name[256];
if( strcmp( key, "XML:com.adobe.xmp") == 0 )
/* Save as an XMP tag.
if( strcmp( key, "XML:com.adobe.xmp" ) == 0 ) {
/* Save as an XMP tag. This must be a BLOB, for compatibility
* for things like the XMP blob that the tiff loader adds.
*
* Note that this will remove the null-termination from the
* string. We must carefully reattach this.
*/
strncpy( name, VIPS_META_XMP_NAME, 256 );
else
/* Save as a comment. Some PNGs have EXIF data as
vips_image_set_blob_copy( out,
VIPS_META_XMP_NAME, text, strlen( text ) );
}
else {
/* Save as a string comment. Some PNGs have EXIF data as
* text segments, but the correct way to support this is with
* png_get_eXIf_1().
*/
vips_snprintf( name, 256, "png-comment-%d-%s", i, key );
vips_image_set_string( out, name, text );
vips_image_set_string( out, name, text );
}
return( 0 );
}
@ -1098,12 +1103,22 @@ write_vips( Write *write,
}
if( vips_image_get_typeof( in, VIPS_META_XMP_NAME ) ) {
const char *str;
void *data;
size_t length;
char *str;
if( vips_image_get_string( in, VIPS_META_XMP_NAME, &str ) )
/* XMP is attached as a BLOB with no null-termination. We
* must re-add this.
*/
if( vips_image_get_blob( in,
VIPS_META_XMP_NAME, &data, &length ) )
return( -1 );
str = g_malloc( length + 1 );
vips_strncpy( str, data, length + 1 );
vips__png_set_text( write->pPng, write->pInfo,
"XML:com.adobe.xmp", str );
g_free( str );
}
/* Set any "png-comment-xx-yyy" metadata items.

2
libvips/iofuncs/buf.c
View File

@ -279,7 +279,7 @@ vips_buf_appendns( VipsBuf *buf, const char *str, int sz )
*/
cpy = VIPS_MIN( n, avail );
strncpy( buf->base + buf->i, str, cpy );
vips_strncpy( buf->base + buf->i, str, cpy );
buf->i += cpy;
if( buf->i >= buf->mx - 4 ) {

1
test/test-suite/test_foreign.py
View File

@ -241,7 +241,6 @@ class TestForeign:
assert im.width == 290
assert im.height == 442
assert im.bands == 3
assert im.get("xmp-data") == "sample xmp string"
self.file_loader("pngload", PNG_FILE, png_valid)
self.buffer_loader("pngload_buffer", PNG_FILE, png_valid)