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/*
*
* This file is part of the XForms library package.
*
* XForms 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 2.1, or
* (at your option) any later version.
*
* XForms 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 XForms; see the file COPYING. If not, write to
* the Free Software Foundation, 59 Temple Place - Suite 330, Boston,
* MA 02111-1307, USA.
*
*/
/*
* $Id: image_gzip.c,v 1.0 2002/05/08 05:16:30 zhao Release $
*
*.
* This file is part of the XForms library package.
* Copyright (c) 1998-2002 T.C. Zhao
* All rights reserved.
*.
*
* handle gzip/compress
*/
#include "forms.h"
#include "flimage.h"
#include "flimage_int.h"
static int
GZIP_identify(FILE * fp)
{
char buf[2];
fread(buf, 1, 2, fp);
return (buf[0] == '\037' && buf[1] == '\213') ||
(buf[0] == '\037' && buf[1] == '\235');
}
static int
GZIP_description(FL_IMAGE * im)
{
static char *cmds[] =
{
"gzip -dc %s > %s",
0
};
return flimage_description_via_filter(im, cmds, "reading gzip ...", 0);
}
static int
GZIP_load(FL_IMAGE * im)
{
fprintf(stderr, "should never been here\n");
return -1;
}
static int
GZIP_dump(FL_IMAGE * im)
{
static char *cmds[] =
{"gzip %s > %s", 0};
static char *formats[] =
{"ppm", "pgm", "pbm", 0};
return flimage_write_via_filter(im, cmds, formats, 0);
}
void
flimage_enable_gzip(void)
{
flimage_add_format("GZIP format", "gzip", "gz",
FL_IMAGE_FLEX,
GZIP_identify,
GZIP_description,
GZIP_load,
GZIP_dump);
}
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