libvips/libsrc/iofuncs/im_image.c

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2007-08-29 18:23:50 +02:00
/* @(#) Make a memory area of pixels into a VIPS image ... we don't free() on
* @(#) im_close(), that's up to the caller ... format is BandFmt
* @(#)
* @(#) Usage:
* @(#)
* @(#) IMAGE *
* @(#) im_image( void *buffer, int width, int height, int bands, int format )
* @(#)
* @(#) The function returns NULL on error.
* Written on: 11/7/00
* Modified on:
* 20/3/01 JC
* - oops, broken for IM_BANDFMT_UCHAR
*/
/*
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
*/
#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>
#ifdef WITH_DMALLOC
#include <dmalloc.h>
#endif /*WITH_DMALLOC*/
IMAGE *
im_image( void *buffer, int width, int height, int bands, int format )
{
IMAGE *im;
if( width <= 0 || height <= 0 || bands <= 0 ||
format < 0 || format > IM_BANDFMT_DPCOMPLEX ) {
im_errormsg( "im_image: bad parameters" );
return( NULL );
}
/* Make new output image for us.
*/
if( !(im = im_init( "untitled" )) )
return( NULL );
/* Set header fields.
*/
im->Xsize = width;
im->Ysize = height;
im->Bands = bands;
im->BandFmt = format;
im->Bbits = im_bits_of_fmt( format );
im->Coding = IM_CODING_NONE;
if( bands == 1 )
im->Type = IM_TYPE_B_W;
else if( bands == 3 )
im->Type = IM_TYPE_RGB;
else
im->Type = IM_TYPE_MULTIBAND;
im->data = (char *) buffer;
im->dtype = IM_SETBUF_FOREIGN;
return( im );
}