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caddbb58 | 1 | /* |
efb2f309 | 2 | Copyright 1993-2002 by Easy Software Products. |
caddbb58 | 3 | Copyright 1994, 1998 Aladdin Enterprises. All rights reserved. |
4 | ||
8e4ff0ae | 5 | This file is part of GNU Ghostscript. |
caddbb58 | 6 | |
8e4ff0ae | 7 | GNU Ghostscript is distributed in the hope that it will be useful, but |
caddbb58 | 8 | WITHOUT ANY WARRANTY. No author or distributor accepts responsibility |
9 | to anyone for the consequences of using it or for whether it serves any | |
10 | particular purpose or works at all, unless he says so in writing. Refer | |
11 | to the GNU General Public License for full details. | |
12 | ||
8e4ff0ae | 13 | Everyone is granted permission to copy, modify and redistribute GNU |
14 | Ghostscript, but only under the conditions described in the GNU General | |
caddbb58 | 15 | Public License. A copy of this license is supposed to have been given |
16 | to you along with GNU Ghostscript so you can know your rights and | |
8e4ff0ae | 17 | responsibilities. It should be in a file named COPYING. Among other |
18 | things, the copyright notice and this notice must be preserved on all | |
19 | copies. | |
caddbb58 | 20 | |
21 | Aladdin Enterprises supports the work of the GNU Project, but is not | |
22 | affiliated with the Free Software Foundation or the GNU Project. GNU | |
23 | Ghostscript, as distributed by Aladdin Enterprises, does not require any | |
24 | GNU software to build or run it. | |
8e4ff0ae | 25 | */ |
caddbb58 | 26 | |
178c9be3 | 27 | #include <config.h> |
28 | #ifdef HAVE_LIBJPEG | |
efb2f309 | 29 | /*$Id: sjpege.c,v 1.5 2002/01/02 17:59:12 mike Exp $ */ |
8e4ff0ae | 30 | /* Interface routines for IJG encoding code. */ |
31 | #include "stdio_.h" | |
32 | #include "string_.h" | |
33 | #include "jpeglib.h" | |
34 | #include "jerror.h" | |
35 | #include "gx.h" | |
36 | #include "gserrors.h" | |
37 | #include "strimpl.h" | |
38 | #include "sdct.h" | |
39 | #include "sjpeg.h" | |
40 | ||
41 | /* | |
42 | * Interface routines. This layer of routines exists solely to limit | |
43 | * side-effects from using setjmp. | |
44 | */ | |
45 | ||
46 | int | |
caddbb58 | 47 | gs_jpeg_create_compress(stream_DCT_state * st) |
48 | { /* Initialize error handling */ | |
49 | gs_jpeg_error_setup(st); | |
50 | /* Establish the setjmp return context for gs_jpeg_error_exit to use. */ | |
51 | if (setjmp(st->data.common->exit_jmpbuf)) | |
52 | return_error(gs_jpeg_log_error(st)); | |
53 | ||
54 | jpeg_create_compress(&st->data.compress->cinfo); | |
55 | jpeg_stream_data_common_init(st->data.compress); | |
56 | return 0; | |
57 | } | |
8e4ff0ae | 58 | |
caddbb58 | 59 | int |
60 | gs_jpeg_set_defaults(stream_DCT_state * st) | |
61 | { | |
62 | if (setjmp(st->data.common->exit_jmpbuf)) | |
63 | return_error(gs_jpeg_log_error(st)); | |
64 | jpeg_set_defaults(&st->data.compress->cinfo); | |
65 | return 0; | |
8e4ff0ae | 66 | } |
67 | ||
68 | int | |
caddbb58 | 69 | gs_jpeg_set_colorspace(stream_DCT_state * st, |
70 | J_COLOR_SPACE colorspace) | |
71 | { | |
72 | if (setjmp(st->data.common->exit_jmpbuf)) | |
73 | return_error(gs_jpeg_log_error(st)); | |
74 | jpeg_set_colorspace(&st->data.compress->cinfo, colorspace); | |
75 | return 0; | |
8e4ff0ae | 76 | } |
77 | ||
78 | int | |
caddbb58 | 79 | gs_jpeg_set_linear_quality(stream_DCT_state * st, |
80 | int scale_factor, boolean force_baseline) | |
81 | { | |
82 | if (setjmp(st->data.common->exit_jmpbuf)) | |
83 | return_error(gs_jpeg_log_error(st)); | |
84 | jpeg_set_linear_quality(&st->data.compress->cinfo, | |
85 | scale_factor, force_baseline); | |
86 | return 0; | |
8e4ff0ae | 87 | } |
88 | ||
89 | int | |
caddbb58 | 90 | gs_jpeg_set_quality(stream_DCT_state * st, |
91 | int quality, boolean force_baseline) | |
92 | { | |
93 | if (setjmp(st->data.common->exit_jmpbuf)) | |
94 | return_error(gs_jpeg_log_error(st)); | |
95 | jpeg_set_quality(&st->data.compress->cinfo, | |
96 | quality, force_baseline); | |
97 | return 0; | |
8e4ff0ae | 98 | } |
99 | ||
100 | int | |
caddbb58 | 101 | gs_jpeg_start_compress(stream_DCT_state * st, |
102 | boolean write_all_tables) | |
103 | { | |
104 | if (setjmp(st->data.common->exit_jmpbuf)) | |
105 | return_error(gs_jpeg_log_error(st)); | |
106 | jpeg_start_compress(&st->data.compress->cinfo, write_all_tables); | |
107 | return 0; | |
8e4ff0ae | 108 | } |
109 | ||
110 | int | |
caddbb58 | 111 | gs_jpeg_write_scanlines(stream_DCT_state * st, |
112 | JSAMPARRAY scanlines, | |
113 | int num_lines) | |
114 | { | |
115 | if (setjmp(st->data.common->exit_jmpbuf)) | |
116 | return_error(gs_jpeg_log_error(st)); | |
117 | return (int)jpeg_write_scanlines(&st->data.compress->cinfo, | |
118 | scanlines, (JDIMENSION) num_lines); | |
8e4ff0ae | 119 | } |
120 | ||
121 | int | |
caddbb58 | 122 | gs_jpeg_finish_compress(stream_DCT_state * st) |
123 | { | |
124 | if (setjmp(st->data.common->exit_jmpbuf)) | |
125 | return_error(gs_jpeg_log_error(st)); | |
126 | jpeg_finish_compress(&st->data.compress->cinfo); | |
127 | return 0; | |
8e4ff0ae | 128 | } |
caddbb58 | 129 | #endif /* HAVE_LIBJPEG */ |