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save openslide metadata to .dzi files

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see https://github.com/jcupitt/libvips/issues/137

todo:

- save to zoomify ImageProperties.xml as well?
- any other useful fields?
This commit is contained in:
John Cupitt 2014-06-25 11:26:05 +01:00
parent d1e082889f
commit e9a0acfa9b
1 changed files with 27 additions and 0 deletions
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27
libvips/foreign/dzsave.c
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@ -42,6 +42,9 @@
* 8/5/14
* - set Type on strips so we can convert for save correctly, thanks
* philipgiuliani
* 25/6/14
* - save openslide metadata to .dzi, see
* https://github.com/jcupitt/libvips/issues/137
*/
/*
@ -591,9 +594,30 @@ pyramid_build( VipsForeignSaveDz *dz, Layer *above,
return( layer );
}
static void *
write_dzi_field( VipsImage *image, const char *field, GValue *value, void *a )
{
GsfOutput *out = (GsfOutput *) a;
if( vips_isprefix( "openslide.", field ) &&
!vips_isprefix( "openslide.level", field ) ) {
char *str_value;
str_value = g_strdup_value_contents( value );
gsf_output_printf( out, " %s=\"%s\"\n",
field + 10, str_value );
g_free( str_value );
}
return( NULL );
}
static int
write_dzi( VipsForeignSaveDz *dz )
{
VipsForeignSave *save = (VipsForeignSave *) dz;
GsfOutput *out;
char buf[VIPS_PATH_MAX];
char *p;
@ -616,6 +640,9 @@ write_dzi( VipsForeignSaveDz *dz )
gsf_output_printf( out, " Height=\"%d\"\n", dz->layer->height );
gsf_output_printf( out, " Width=\"%d\"\n", dz->layer->width );
gsf_output_printf( out, " />\n" );
gsf_output_printf( out, " <Openslide\n" );
(void) vips_image_map( save->ready, write_dzi_field, out );
gsf_output_printf( out, " />\n" );
gsf_output_printf( out, "</Image>\n" );
(void) gsf_output_close( out );