1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
|
/* Convert 1 or 3-band 8-bit VIPS images to/from JPEG.
*
* 30/11/11
* - now just a stub
* 10/7/12
* - use jpeg funcs directly rather than going though vips_jpegload()
*/
/*
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., 51 Franklin Street, Fifth Floor, Boston, MA
02110-1301 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 <setjmp.h>
#include <vips/vips.h>
#ifdef HAVE_JPEG
#include "../foreign/vipsjpeg.h"
#endif /*HAVE_JPEG*/
static int
jpeg2vips( const char *name, IMAGE *out, gboolean header_only )
{
char filename[FILENAME_MAX];
char mode[FILENAME_MAX];
char *p, *q;
int shrink;
int seq;
gboolean fail_on_warn;
/* 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;
seq = 0;
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( (q = im_getnextoption( &p )) ) {
if( im_isprefix( "seq", q ) )
seq = 1;
}
/* Don't use vips_jpegload() ... we call the jpeg func directly in
* order to avoid the foreign.c mechanisms for load-via-disc and stuff
* like that.
*/
/* We need to be compatible with the pre-sequential mode
* im_jpeg2vips(). This returned a "t" if given a "p" image, since it
* used writeline.
*
* If we're writing the image to a "p", switch it to a "t".
*/
if( !header_only &&
!seq &&
out->dtype == VIPS_IMAGE_PARTIAL ) {
if( vips__image_wio_output( out ) )
return( -1 );
}
#ifdef HAVE_JPEG
if( vips__jpeg_read_file( filename, out,
header_only, shrink, fail_on_warn, TRUE, FALSE ) )
return( -1 );
#else
vips_error( "im_jpeg2vips",
"%s", _( "no JPEG support in your libvips" ) );
return( -1 );
#endif /*HAVE_JPEG*/
return( 0 );
}
int
im_jpeg2vips( const char *name, IMAGE *out )
{
return( jpeg2vips( name, out, FALSE ) );
}
/* By having a separate header func, we get lazy.c to open via disc/mem.
*/
static int
im_jpeg2vips_header( const char *name, IMAGE *out )
{
return( jpeg2vips( name, out, TRUE ) );
}
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->header = im_jpeg2vips_header;
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 );
|
