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/* load raw data from a file
*
* 14/12/11
*/
/*
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 <vips/vips.h>
#include <vips/internal.h>
typedef struct _VipsForeignLoadRaw {
VipsForeignLoad parent_object;
char *filename;
int width;
int height;
int bands;
guint64 offset;
} VipsForeignLoadRaw;
typedef VipsForeignLoadClass VipsForeignLoadRawClass;
G_DEFINE_TYPE( VipsForeignLoadRaw, vips_foreign_load_raw,
VIPS_TYPE_FOREIGN_LOAD );
static VipsForeignFlags
vips_foreign_load_raw_get_flags( VipsForeignLoad *load )
{
return( VIPS_FOREIGN_PARTIAL );
}
static VipsForeignFlags
vips_foreign_load_raw_get_flags_filename( const char *filename )
{
return( VIPS_FOREIGN_PARTIAL );
}
static int
vips_foreign_load_raw_header( VipsForeignLoad *load )
{
VipsForeignLoadRaw *raw = (VipsForeignLoadRaw *) load;
VipsImage *out;
VipsImage *out2;
if( !(out2 = vips_image_new_from_file_raw( raw->filename,
raw->width, raw->height, raw->bands, raw->offset )) )
return( -1 );
/* Remove the @out that's there now.
*/
g_object_get( load, "out", &out, NULL );
g_object_unref( out );
g_object_unref( out );
g_object_set( load, "out", out2, NULL );
return( 0 );
}
static void
vips_foreign_load_raw_class_init( VipsForeignLoadRawClass *class )
{
GObjectClass *gobject_class = G_OBJECT_CLASS( class );
VipsObjectClass *object_class = (VipsObjectClass *) 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 = "rawload";
object_class->description = _( "load raw data from a file" );
load_class->get_flags = vips_foreign_load_raw_get_flags;
load_class->get_flags_filename =
vips_foreign_load_raw_get_flags_filename;
load_class->header = vips_foreign_load_raw_header;
VIPS_ARG_STRING( class, "filename", 1,
_( "Filename" ),
_( "Filename to load from" ),
VIPS_ARGUMENT_REQUIRED_INPUT,
G_STRUCT_OFFSET( VipsForeignLoadRaw, filename ),
NULL );
VIPS_ARG_INT( class, "width", 10,
_( "Width" ),
_( "Image width in pixels" ),
VIPS_ARGUMENT_REQUIRED_INPUT,
G_STRUCT_OFFSET( VipsForeignLoadRaw, width ),
0, VIPS_MAX_COORD, 0 );
VIPS_ARG_INT( class, "height", 11,
_( "Height" ),
_( "Image height in pixels" ),
VIPS_ARGUMENT_REQUIRED_INPUT,
G_STRUCT_OFFSET( VipsForeignLoadRaw, height ),
0, VIPS_MAX_COORD, 0 );
VIPS_ARG_INT( class, "bands", 12,
_( "Bands" ),
_( "Number of bands in image" ),
VIPS_ARGUMENT_REQUIRED_INPUT,
G_STRUCT_OFFSET( VipsForeignLoadRaw, bands ),
0, VIPS_MAX_COORD, 0 );
VIPS_ARG_UINT64( class, "offset", 13,
_( "Size of header" ),
_( "Offset in bytes from start of file" ),
VIPS_ARGUMENT_OPTIONAL_INPUT,
G_STRUCT_OFFSET( VipsForeignLoadRaw, offset ),
0, 100000000000, 0 );
}
static void
vips_foreign_load_raw_init( VipsForeignLoadRaw *raw )
{
}
/**
* vips_rawload:
* @filename: file to load
* @out: output image
* @width: width of image in pixels
* @height: height of image in pixels
* @bands: number of image bands
* @...: %NULL-terminated list of optional named arguments
*
* Optional arguments:
*
* * @offset: %guint64, offset in bytes from start of file
*
* This operation mmaps the file, setting up @out so that access to that
* image will read from the file.
*
* @out will be a 8-bit uchar image with @bands image bands, so @bands can
* be thought of as meaning "number of bytes per pixel". Use functions
* like vips_copy() to set the exact band format, number of bands,
* and so on. Use vips_byteswap() to reverse the byte ordering.
*
* See also: vips_image_new_from_file(), vips_copy(), vips_byteswap().
*
* Returns: 0 on success, -1 on error.
*/
int
vips_rawload( const char *filename, VipsImage **out,
int width, int height, int bands, ... )
{
va_list ap;
int result;
va_start( ap, bands );
result = vips_call_split( "rawload", ap,
filename, out, width, height, bands );
va_end( ap );
return( result );
}
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