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/* Convert 1 or 3-band 8-bit VIPS images to/from JPEG.
*
* 30/11/11
* - now just a stub
*/
/*
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_VERBOSE
#define DEBUG
*/
#ifdef HAVE_CONFIG_H
#include <config.h>
#endif /*HAVE_CONFIG_H*/
#include <vips/intl.h>
#include <stdlib.h>
#include <vips/vips.h>
int
im_jpeg2vips( const char *name, IMAGE *out )
{
char filename[FILENAME_MAX];
char mode[FILENAME_MAX];
char *p, *q;
int shrink;
gboolean fail_on_warn;
VipsImage *t;
/* By default, we ignore any warnings. We want to get as much of
* the user's data as we can.
*/
fail_on_warn = FALSE;
/* Parse the filename.
*/
im_filename_split( name, filename, mode );
p = &mode[0];
shrink = 1;
if( (q = im_getnextoption( &p )) ) {
shrink = atoi( q );
if( shrink != 1 && shrink != 2 &&
shrink != 4 && shrink != 8 ) {
im_error( "im_jpeg2vips",
_( "bad shrink factor %d" ), shrink );
return( -1 );
}
}
if( (q = im_getnextoption( &p )) ) {
if( im_isprefix( "fail", q ) )
fail_on_warn = TRUE;
}
if( vips_jpegload( filename, &t,
"shrink", shrink,
"fail", fail_on_warn,
NULL ) )
return( -1 );
if( vips_image_write( t, out ) ) {
g_object_unref( t );
return( -1 );
}
g_object_unref( t );
return( 0 );
}
int
im_bufjpeg2vips( void *buf, size_t len, IMAGE *out, gboolean header_only )
{
VipsImage *t;
/* header_only is now automatic ... this call will only decompress on
* pixel access.
*/
if( vips_jpegload_buffer( buf, len, &t, NULL ) )
return( -1 );
if( vips_image_write( t, out ) ) {
g_object_unref( t );
return( -1 );
}
g_object_unref( t );
return( 0 );
}
static int
isjpeg( const char *name )
{
char filename[FILENAME_MAX];
char mode[FILENAME_MAX];
im_filename_split( name, filename, mode );
return( vips_foreign_is_a( "jpegload", filename ) );
}
static const char *jpeg_suffs[] = { ".jpg", ".jpeg", ".jpe", NULL };
/* jpeg format adds no new members.
*/
typedef VipsFormat VipsFormatJpeg;
typedef VipsFormatClass VipsFormatJpegClass;
static void
vips_format_jpeg_class_init( VipsFormatJpegClass *class )
{
VipsObjectClass *object_class = (VipsObjectClass *) class;
VipsFormatClass *format_class = (VipsFormatClass *) class;
object_class->nickname = "jpeg";
object_class->description = _( "JPEG" );
format_class->is_a = isjpeg;
format_class->load = im_jpeg2vips;
format_class->save = im_vips2jpeg;
format_class->suffs = jpeg_suffs;
}
static void
vips_format_jpeg_init( VipsFormatJpeg *object )
{
}
G_DEFINE_TYPE( VipsFormatJpeg, vips_format_jpeg, VIPS_TYPE_FORMAT );
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