static int
vips_foreign_load_png_header( VipsForeignLoad *load )
{
VipsForeignLoadPng *png = (VipsForeignLoadPng *) load;
if( vips__png_header( png->filename, load->out ) )
return( -1 );
return( 0 );
}
static int
png2vips( const char *name, IMAGE *out, gboolean header_only )
{
char filename[FILENAME_MAX];
char mode[FILENAME_MAX];
char *p, *q;
int seq;
im_filename_split( name, filename, mode );
seq = 0;
p = &mode[0];
if( (q = im_getnextoption( &p )) ) {
if( im_isprefix( "seq", q ) )
seq = 1;
}
/* We need to be compatible with the pre-sequential mode
* im_png2vips(). This returned a "t" if given a "p" image, since it
* used writeline.
*
* If we're writing the image to a "p", switch it to a "t".
*
* Don't do this for header read, since we don't want to force a
* malloc if all we are doing is looking at fields.
*/
if( !header_only &&
!seq &&
out->dtype == VIPS_IMAGE_PARTIAL ) {
if( vips__image_wio_output( out ) )
return( -1 );
}
#ifdef HAVE_PNG
if( header_only ) {
if( vips__png_header( filename, out ) )
return( -1 );
}
else {
if( vips__png_read( filename, out ) )
return( -1 );
}
#else
vips_error( "im_png2vips", _( "no PNG support in your libvips" ) );
return( -1 );
#endif /*HAVE_PNG*/
return( 0 );
}