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libvips
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start adding ICC and XMP support 

not quite working though ... seems to need a fix in libspng still
This commit is contained in:
John Cupitt 2020-06-07 14:00:10 +01:00
parent a44814018d
commit ef408d630b
1 changed files with 33 additions and 3 deletions
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36
libvips/foreign/spngload.c
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@ -171,6 +171,11 @@ vips_foreign_load_png_get_flags_filename( const char *filename )
static void
vips_foreign_load_png_set_header( VipsForeignLoadPng *png, VipsImage *image )
{
struct spng_iccp iccp;
struct spng_text *text;
guint32 n_text;
int ret;
vips_image_init_fields( image,
png->ihdr.width, png->ihdr.height, png->bands,
png->format, VIPS_CODING_NONE, png->interpretation,
@ -178,6 +183,34 @@ vips_foreign_load_png_set_header( VipsForeignLoadPng *png, VipsImage *image )
VIPS_SETSTR( image->filename,
vips_connection_filename( VIPS_CONNECTION( png->source ) ) );
/* Attach ICC profile.
*/
if( !spng_get_iccp( png->ctx, &iccp ) ) {
printf( "attaching profile %s, %zd bytes\n",
iccp.profile_name, iccp.profile_len );
vips_image_set_blob_copy( image,
VIPS_META_ICC_NAME, iccp.profile, iccp.profile_len );
}
/*
spng_get_text( png->ctx, NULL, &n_text );
printf( "reading %" G_GUINT32_FORMAT " text chunks\n", n_text );
text = VIPS_ARRAY( VIPS_OBJECT( png ), n_text, struct spng_text );
if( !spng_get_text( png->ctx, text, &n_text ) ) {
guint32 i;
for( i = 0; i < n_text; i++ ) {
printf( "chunk %d: keyword %s, type %d, length %zd\n",
i, text[i].keyword, text[i].type,
text[i].length );
}
}
*/
/* FIXME ... get resolution, exif, xmp, etc. etc.
*/
/* 0 is no interlace.
*/
if( png->ihdr.interlace_method == 0 )
@ -289,9 +322,6 @@ vips_foreign_load_png_header( VipsForeignLoad *load )
else
png->format = VIPS_FORMAT_UCHAR;
/* FIXME ... get resolution, profile, exif, xmp, etc. etc.
*/
vips_source_minimise( png->source );
vips_foreign_load_png_set_header( png, load->out );