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allow thumbnail colourspace export with no import 

allow this case:

	vipsthumbnail k2.jpg --export-profile cmyk

for an image with no embedded profile
This commit is contained in:
John Cupitt 2021-03-05 11:11:49 +00:00
parent c4d56fd475
commit 9585feb5a8
1 changed files with 31 additions and 13 deletions
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44
libvips/resample/thumbnail.c
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@ -855,23 +855,41 @@ vips_thumbnail_build( VipsObject *object )
* to the output space.
*/
g_info( "transforming to %s", thumbnail->export_profile );
if( thumbnail->import_profile )
g_info( "fallback input profile %s",
thumbnail->import_profile );
if( vips_icc_transform( in, &t[7],
thumbnail->export_profile,
"input_profile", thumbnail->import_profile,
"intent", thumbnail->intent,
"embedded", TRUE,
NULL ) )
return( -1 );
in = t[7];
/* If there's some kind of import profile, we can transform to
* the output. Otherwise we have to convert to PCS and then
* export.
*/
if( thumbnail->import_profile ||
(vips_image_get_typeof( in, VIPS_META_ICC_NAME ) ||
thumbnail->import_profile) ) {
g_info( "transforming with supplied profiles" );
if( vips_icc_transform( in, &t[7],
thumbnail->export_profile,
"input_profile", thumbnail->import_profile,
"intent", thumbnail->intent,
"embedded", TRUE,
NULL ) )
return( -1 );
in = t[7];
}
else {
g_info( "exporting with %s",
thumbnail->export_profile );
if( vips_colourspace( in, &t[7],
VIPS_INTERPRETATION_XYZ, NULL ) ||
vips_icc_export( t[7], &t[8],
"output_profile", thumbnail->export_profile,
"intent", thumbnail->intent,
NULL ) )
return( -1 );
in = t[8];
}
}
else if( thumbnail->linear ) {
/* Linear mode, no colour management. We went to scRGB for
* processing, so we now revert to the input
* colourspace.
* processing, so we now revert to the input colourspace.
*/
g_info( "reverting to input space %s",
vips_enum_nick( VIPS_TYPE_INTERPRETATION,