| 2 |
- |
1 |
/* Copyright (C) 1994 Aladdin Enterprises. All rights reserved.
|
|
|
2 |
|
|
|
3 |
This software is provided AS-IS with no warranty, either express or
|
|
|
4 |
implied.
|
|
|
5 |
|
|
|
6 |
This software is distributed under license and may not be copied,
|
|
|
7 |
modified or distributed except as expressly authorized under the terms
|
|
|
8 |
of the license contained in the file LICENSE in this distribution.
|
|
|
9 |
|
|
|
10 |
For more information about licensing, please refer to
|
|
|
11 |
http://www.ghostscript.com/licensing/. For information on
|
|
|
12 |
commercial licensing, go to http://www.artifex.com/licensing/ or
|
|
|
13 |
contact Artifex Software, Inc., 101 Lucas Valley Road #110,
|
|
|
14 |
San Rafael, CA 94903, U.S.A., +1(415)492-9861.
|
|
|
15 |
*/
|
|
|
16 |
|
|
|
17 |
/* $Id: sjpeg.h,v 1.5 2002/06/16 05:00:54 lpd Exp $ */
|
|
|
18 |
/* IJG entry point wrappers */
|
|
|
19 |
/* Requires sdct.h, jpeg/jpeglib.h */
|
|
|
20 |
|
|
|
21 |
#ifndef sjpeg_INCLUDED
|
|
|
22 |
# define sjpeg_INCLUDED
|
|
|
23 |
|
|
|
24 |
/*
|
|
|
25 |
* Each routine gs_jpeg_xxx is equivalent to the IJG entry point jpeg_xxx,
|
|
|
26 |
* except that
|
|
|
27 |
* (a) it takes a pointer to stream_DCT_state instead of just the IJG
|
|
|
28 |
* jpeg_(de)compress_data struct;
|
|
|
29 |
* (b) it catches any error exit from the IJG code and converts it into
|
|
|
30 |
* an error return value per Ghostscript custom. A negative return
|
|
|
31 |
* value is an error code, except for gs_jpeg_alloc_xxx which return
|
|
|
32 |
* NULL (indicating e_VMerror).
|
|
|
33 |
*/
|
|
|
34 |
|
|
|
35 |
/* Common to encode/decode */
|
|
|
36 |
|
|
|
37 |
void gs_jpeg_error_setup(stream_DCT_state * st);
|
|
|
38 |
int gs_jpeg_log_error(stream_DCT_state * st);
|
|
|
39 |
JQUANT_TBL *gs_jpeg_alloc_quant_table(stream_DCT_state * st);
|
|
|
40 |
JHUFF_TBL *gs_jpeg_alloc_huff_table(stream_DCT_state * st);
|
|
|
41 |
int gs_jpeg_destroy(stream_DCT_state * st);
|
|
|
42 |
|
|
|
43 |
/* Encode */
|
|
|
44 |
|
|
|
45 |
int gs_jpeg_create_compress(stream_DCT_state * st);
|
|
|
46 |
int gs_jpeg_set_defaults(stream_DCT_state * st);
|
|
|
47 |
int gs_jpeg_set_colorspace(stream_DCT_state * st,
|
|
|
48 |
J_COLOR_SPACE colorspace);
|
|
|
49 |
int gs_jpeg_set_linear_quality(stream_DCT_state * st,
|
|
|
50 |
int scale_factor, boolean force_baseline);
|
|
|
51 |
int gs_jpeg_set_quality(stream_DCT_state * st,
|
|
|
52 |
int quality, boolean force_baseline);
|
|
|
53 |
int gs_jpeg_start_compress(stream_DCT_state * st,
|
|
|
54 |
boolean write_all_tables);
|
|
|
55 |
int gs_jpeg_write_scanlines(stream_DCT_state * st,
|
|
|
56 |
JSAMPARRAY scanlines, int num_lines);
|
|
|
57 |
int gs_jpeg_finish_compress(stream_DCT_state * st);
|
|
|
58 |
|
|
|
59 |
/* Decode */
|
|
|
60 |
|
|
|
61 |
int gs_jpeg_create_decompress(stream_DCT_state * st);
|
|
|
62 |
int gs_jpeg_read_header(stream_DCT_state * st,
|
|
|
63 |
boolean require_image);
|
|
|
64 |
int gs_jpeg_start_decompress(stream_DCT_state * st);
|
|
|
65 |
int gs_jpeg_read_scanlines(stream_DCT_state * st,
|
|
|
66 |
JSAMPARRAY scanlines, int max_lines);
|
|
|
67 |
int gs_jpeg_finish_decompress(stream_DCT_state * st);
|
|
|
68 |
|
|
|
69 |
#endif /* sjpeg_INCLUDED */
|