libvips/libsrc/format/im_vips2raw.c

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2008-08-15 10:40:05 +02:00
/* Write raw image data to file. Usefull when defining new formats...
*
* Jesper Friis
*
* 10/06/08 JF
* - initial code based on im_vips2ppm()
*
* 04/07/08 JF
* - replaced FILE with plain file handlers for reducing
* confusion about binary vs. non-binary file modes.
*/
/*
This file is part of the QED plugin to 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
*/
#ifdef HAVE_CONFIG_H
#include <config.h>
#endif /*HAVE_CONFIG_H*/
#include <vips/intl.h>
#include <ctype.h>
#include <stdio.h>
#include <assert.h>
#include <stdlib.h>
#include <string.h>
#include <time.h>
#include <limits.h>
#include <glib/gstring.h>
#include <vips/vips.h>
#ifdef WITH_DMALLOC
#include <dmalloc.h>
#endif /*WITH_DMALLOC*/
/* What we track during a write
*/
typedef struct {
IMAGE *in;
im_threadgroup_t *tg;
int fd;
} Write;
static void
write_destroy( Write *write )
{
IM_FREEF( im_threadgroup_free, write->tg );
im_free( write );
}
static Write *
write_new( IMAGE *in, int fd )
{
Write *write;
if( !(write = IM_NEW( NULL, Write )) )
return( NULL );
write->in = in;
write->tg = im_threadgroup_create( write->in );
write->fd = fd;
if( !write->tg || !write->fd ) {
write_destroy( write );
return( NULL );
}
return( write );
}
static int
write_block( REGION *region, Rect *area, void *a, void *b )
{
Write *write = (Write *) a;
int i;
for( i = 0; i < area->height; i++ ) {
PEL *p = (PEL *) IM_REGION_ADDR( region, area->left, area->top + i );
if( im__write( write->fd, p, IM_IMAGE_SIZEOF_PEL(write->in)*area->width ) )
return( -1 );
}
return( 0 );
}
int
im_vips2raw( IMAGE *in, int fd )
{
Write *write;
if( im_pincheck( in ) || !(write = write_new( in, fd )) )
return( -1 );
if( im_wbuffer( write->tg, write_block, write, NULL ) ) {
write_destroy( write );
return( -1 );
}
write_destroy( write );
return( 0 );
}