libvips/libsrc/iofuncs/im_init.c

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2007-08-29 18:23:50 +02:00
/* @(#) Initialise the IMAGE to impossible startup values. Install the
* @(#) filename.
* @(#)
* @(#) IMAGE *im_init( char *filename )
*
* Copyright: Nicos Dessipris & Kirk Martinez, 1990
* Written on: 13/02/1990
* Modified on : 3/6/92 22/2/93
* 15/4/93 J.Cupitt
* - init for partial image buffers added
* - init for type field
* - filename added
* 10/5/93 J.Cupitt
* - allocates space for IMAGE too, and returns new data
* 23/2/94 JC
* - ANSIfied, man page revised
* 16/8/94 JC
* - evalend callbacks added
* 28/11/94 JC
* - new compression fields added, thr added
* 24/10/95 JC
* - now tracks open images ... see also im_close() and debug.c
* 1/12/04 JC
* - added an im_init_world() to help old progs
* 30/9/05
* - added sizeof_header
* 2/1/07
* - init magic
* - init history_list
*/
/*
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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
/*
These files are distributed with VIPS - http://www.vips.ecs.soton.ac.uk
*/
/*
#define DEBUG_NEW
*/
#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/debug.h>
#include <vips/thread.h>
#ifdef WITH_DMALLOC
#include <dmalloc.h>
#endif /*WITH_DMALLOC*/
/* Make a new IMAGE structure, set fields to an initial state. We set the
* filename field only.
*/
IMAGE *
im_init( const char *filename )
{
IMAGE *im;
/* Pass in a nonsense name for argv0 ... this init world is only here
* for old programs which are missing an im_init_world() call. We must
* have threads set up before we can process.
*/
if( im_init_world( "vips" ) )
im_error_clear();
if( !(im = IM_NEW( NULL, IMAGE )) )
return( NULL );
#ifdef DEBUG_NEW
printf( "im_init: new IMAGE 0x%p, \"%s\"\n", im, filename );
#endif /*DEBUG_NEW*/
im->Xsize = -1;
im->Ysize = -1;
im->Bands = -1;
im->Bbits = -1;
im->BandFmt = -1;
im->Coding = -1;
im->Type = -1;
im->Xres = 1.0;
im->Yres = 1.0;
im->Length = 0;
im->Compression = 0;
im->Level = 0;
im->Xoffset = 0;
im->Yoffset = 0;
im->Hist = NULL;
im->data = NULL;
im->time = NULL;
im->kill = 0;
im->dtype = IM_NONE;
im->fd = -1;
im->baseaddr = NULL;
im->length = 0;
im->closefns = NULL;
im->evalfns = NULL;
im->evalendfns = NULL;
im->closing = 0;
im->close_pending = 0;
/* Default to native order.
*/
im->magic = im_amiMSBfirst() ? IM_MAGIC_SPARC : IM_MAGIC_INTEL;
im->start = NULL;
im->generate = NULL;
im->stop = NULL;
im->client1 = NULL;
im->client2 = NULL;
im->sslock = g_mutex_new();
im->regions = NULL;
im->dhint = IM_SMALLTILE;
im->Meta = NULL;
im->Meta_traverse = NULL;
/* Default to the VIPS header size. Can be changed later.
*/
im->sizeof_header = IM_SIZEOF_HEADER;
im->windows = NULL;
im->parents = NULL;
im->children = NULL;
im->serial = 0;
im->history_list = NULL;
if( !(im->filename = im_strdup( NULL, filename )) ) {
im_close( im );
return( NULL );
}
im__open_images = g_slist_prepend( im__open_images, im );
return( im );
}