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/* load radlab from a file
*
* 5/12/11
* - from tiffload.c
*/
/*
This file is part of VIPS.
VIPS is free software; you can redistribute it and/or modify
it under the terms of the GNU Lesser General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
02110-1301 USA
*/
/*
These files are distributed with VIPS - http://www.vips.ecs.soton.ac.uk
*/
/*
#define DEBUG
*/
#ifdef HAVE_CONFIG_H
#include <config.h>
#endif /*HAVE_CONFIG_H*/
#include <vips/intl.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <vips/vips.h>
#include <vips/buf.h>
#include <vips/internal.h>
#ifdef HAVE_RADIANCE
#include "radiance.h"
typedef struct _VipsForeignLoadRad {
VipsForeignLoad parent_object;
/* Filename for load.
*/
char *filename;
} VipsForeignLoadRad;
typedef VipsForeignLoadClass VipsForeignLoadRadClass;
G_DEFINE_TYPE( VipsForeignLoadRad, vips_foreign_load_rad,
VIPS_TYPE_FOREIGN_LOAD );
static VipsForeignFlags
vips_foreign_load_rad_get_flags_filename( const char *filename )
{
/* The rad reader supports sequential read.
*/
return( VIPS_FOREIGN_SEQUENTIAL );
}
static VipsForeignFlags
vips_foreign_load_rad_get_flags( VipsForeignLoad *load )
{
VipsForeignLoadRad *rad = (VipsForeignLoadRad *) load;
return( vips_foreign_load_rad_get_flags_filename( rad->filename ) );
}
static int
vips_foreign_load_rad_header( VipsForeignLoad *load )
{
VipsForeignLoadRad *rad = (VipsForeignLoadRad *) load;
if( vips__rad_header( rad->filename, load->out ) )
return( -1 );
VIPS_SETSTR( load->out->filename, rad->filename );
return( 0 );
}
static int
vips_foreign_load_rad_load( VipsForeignLoad *load )
{
VipsForeignLoadRad *rad = (VipsForeignLoadRad *) load;
if( vips__rad_load( rad->filename, load->real,
load->access == VIPS_ACCESS_SEQUENTIAL ) )
return( -1 );
return( 0 );
}
static void
vips_foreign_load_rad_class_init( VipsForeignLoadRadClass *class )
{
GObjectClass *gobject_class = G_OBJECT_CLASS( class );
VipsObjectClass *object_class = (VipsObjectClass *) class;
VipsForeignClass *foreign_class = (VipsForeignClass *) class;
VipsForeignLoadClass *load_class = (VipsForeignLoadClass *) class;
gobject_class->set_property = vips_object_set_property;
gobject_class->get_property = vips_object_get_property;
object_class->nickname = "radload";
object_class->description = _( "load a Radiance image from a file" );
foreign_class->suffs = vips__rad_suffs;
/* is_a() is not that quick ... lower the priority.
*/
foreign_class->priority = -50;
load_class->is_a = vips__rad_israd;
load_class->get_flags_filename =
vips_foreign_load_rad_get_flags_filename;
load_class->get_flags = vips_foreign_load_rad_get_flags;
load_class->header = vips_foreign_load_rad_header;
load_class->load = vips_foreign_load_rad_load;
VIPS_ARG_STRING( class, "filename", 1,
_( "Filename" ),
_( "Filename to load from" ),
VIPS_ARGUMENT_REQUIRED_INPUT,
G_STRUCT_OFFSET( VipsForeignLoadRad, filename ),
NULL );
}
static void
vips_foreign_load_rad_init( VipsForeignLoadRad *rad )
{
}
#endif /*HAVE_RADIANCE*/
/**
* vips_radload:
* @filename: file to load
* @out: output image
* @...: %NULL-terminated list of optional named arguments
*
* Read a Radiance (HDR) file into a VIPS image.
*
* Radiance files are read as #VIPS_CODING_RAD. They have one byte for each of
* red, green and blue, and one byte of shared exponent. Some operations (like
* vips_extract_area()) can work directly with images in this format, but
* mmany (all the arithmetic operations, for example) will not. Unpack
* #VIPS_CODING_RAD images to 3 band float with vips_rad2float() if
* you want to do arithmetic on them.
*
* This operation ignores some header fields, like VIEW and DATE. It will not
* rotate/flip as the FORMAT string asks.
*
* Sections of this reader from Greg Ward and Radiance with kind permission.
*
* See also: vips_image_new_from_file().
*
* Returns: 0 on success, -1 on error.
*/
int
vips_radload( const char *filename, VipsImage **out, ... )
{
va_list ap;
int result;
va_start( ap, out );
result = vips_call_split( "radload", ap, filename, out );
va_end( ap );
return( result );
}
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