1 | /*
|
---|
2 | * jconfig.doc
|
---|
3 | *
|
---|
4 | * Copyright (C) 1991-1994, Thomas G. Lane.
|
---|
5 | * This file is part of the Independent JPEG Group's software.
|
---|
6 | * For conditions of distribution and use, see the accompanying README file.
|
---|
7 | *
|
---|
8 | * This file documents the configuration options that are required to
|
---|
9 | * customize the JPEG software for a particular system.
|
---|
10 | *
|
---|
11 | * The actual configuration options for a particular installation are stored
|
---|
12 | * in jconfig.h. On many machines, jconfig.h can be generated automatically
|
---|
13 | * or copied from one of the "canned" jconfig files that we supply. But if
|
---|
14 | * you need to generate a jconfig.h file by hand, this file tells you how.
|
---|
15 | *
|
---|
16 | * DO NOT EDIT THIS FILE --- IT WON'T ACCOMPLISH ANYTHING.
|
---|
17 | * EDIT A COPY NAMED JCONFIG.H.
|
---|
18 | */
|
---|
19 | /*
|
---|
20 | * modified for jconfig.h/emx-os2 by Hung-Chi Chu <hcchu@r350.ee.ntu.edu.tw>
|
---|
21 | */
|
---|
22 |
|
---|
23 |
|
---|
24 | /*
|
---|
25 | * These symbols indicate the properties of your machine or compiler.
|
---|
26 | * #define the symbol if yes, #undef it if no.
|
---|
27 | */
|
---|
28 |
|
---|
29 | /* Does your compiler support function prototypes?
|
---|
30 | * (If not, you also need to use ansi2knr, see install.doc)
|
---|
31 | */
|
---|
32 | #define HAVE_PROTOTYPES
|
---|
33 |
|
---|
34 | /* Does your compiler support the declaration "unsigned char" ?
|
---|
35 | * How about "unsigned short" ?
|
---|
36 | */
|
---|
37 | #define HAVE_UNSIGNED_CHAR
|
---|
38 | #define HAVE_UNSIGNED_SHORT
|
---|
39 |
|
---|
40 | /* Define "void" as "char" if your compiler doesn't know about type void.
|
---|
41 | * NOTE: be sure to define void such that "void *" represents the most general
|
---|
42 | * pointer type, e.g., that returned by malloc().
|
---|
43 | */
|
---|
44 | /* #define void char */
|
---|
45 |
|
---|
46 | /* Define "const" as empty if your compiler doesn't know the "const" keyword.
|
---|
47 | */
|
---|
48 | /* #define const */
|
---|
49 |
|
---|
50 | /* Define this if an ordinary "char" type is unsigned.
|
---|
51 | * If you're not sure, leaving it undefined will work at some cost in speed.
|
---|
52 | * If you defined HAVE_UNSIGNED_CHAR then the speed difference is minimal.
|
---|
53 | */
|
---|
54 | #undef CHAR_IS_UNSIGNED
|
---|
55 |
|
---|
56 | /* Define this if your system has an ANSI-conforming <stddef.h> file.
|
---|
57 | */
|
---|
58 | #define HAVE_STDDEF_H
|
---|
59 |
|
---|
60 | /* Define this if your system has an ANSI-conforming <stdlib.h> file.
|
---|
61 | */
|
---|
62 | #define HAVE_STDLIB_H
|
---|
63 |
|
---|
64 | /* Define this if your system does not have an ANSI/SysV <string.h>,
|
---|
65 | * but does have a BSD-style <strings.h>.
|
---|
66 | */
|
---|
67 | #undef NEED_BSD_STRINGS
|
---|
68 |
|
---|
69 | /* Define this if your system does not provide typedef size_t in any of the
|
---|
70 | * ANSI-standard places (stddef.h, stdlib.h, or stdio.h), but places it in
|
---|
71 | * <sys/types.h> instead.
|
---|
72 | */
|
---|
73 | #undef NEED_SYS_TYPES_H
|
---|
74 |
|
---|
75 | /* For 80x86 machines, you need to define NEED_FAR_POINTERS,
|
---|
76 | * unless you are using a large-data memory model or 80386 flat-memory mode.
|
---|
77 | * On less brain-damaged CPUs this symbol must not be defined.
|
---|
78 | * (Defining this symbol causes large data structures to be referenced through
|
---|
79 | * "far" pointers and to be allocated with a special version of malloc.)
|
---|
80 | */
|
---|
81 | #undef NEED_FAR_POINTERS
|
---|
82 |
|
---|
83 | /* Define this if your linker needs global names to be unique in less
|
---|
84 | * than the first 15 characters.
|
---|
85 | */
|
---|
86 | #undef NEED_SHORT_EXTERNAL_NAMES
|
---|
87 |
|
---|
88 | /* Although a real ANSI C compiler can deal perfectly well with pointers to
|
---|
89 | * unspecified structures (see "incomplete types" in the spec), a few pre-ANSI
|
---|
90 | * and pseudo-ANSI compilers get confused. To keep one of these bozos happy,
|
---|
91 | * define INCOMPLETE_TYPES_BROKEN. This is not recommended unless you
|
---|
92 | * actually get "missing structure definition" warnings or errors while
|
---|
93 | * compiling the JPEG code.
|
---|
94 | */
|
---|
95 | #undef INCOMPLETE_TYPES_BROKEN
|
---|
96 |
|
---|
97 |
|
---|
98 | /*
|
---|
99 | * The following options affect code selection within the JPEG library,
|
---|
100 | * but they don't need to be visible to applications using the library.
|
---|
101 | * To minimize application namespace pollution, the symbols won't be
|
---|
102 | * defined unless JPEG_INTERNALS has been defined.
|
---|
103 | */
|
---|
104 |
|
---|
105 | #ifdef JPEG_INTERNALS
|
---|
106 |
|
---|
107 | /* Define this if your compiler implements ">>" on signed values as a logical
|
---|
108 | * (unsigned) shift; leave it undefined if ">>" is a signed (arithmetic) shift,
|
---|
109 | * which is the normal and rational definition.
|
---|
110 | */
|
---|
111 | #undef RIGHT_SHIFT_IS_UNSIGNED
|
---|
112 |
|
---|
113 |
|
---|
114 | #endif /* JPEG_INTERNALS */
|
---|
115 |
|
---|
116 |
|
---|
117 | /*
|
---|
118 | * The remaining options do not affect the JPEG library proper,
|
---|
119 | * but only the sample applications cjpeg/djpeg (see cjpeg.c, djpeg.c).
|
---|
120 | * Other applications can ignore these.
|
---|
121 | */
|
---|
122 |
|
---|
123 | #ifdef JPEG_CJPEG_DJPEG
|
---|
124 |
|
---|
125 | /* These defines indicate which image (non-JPEG) file formats are allowed. */
|
---|
126 |
|
---|
127 | #define BMP_SUPPORTED /* BMP image file format */
|
---|
128 | #define GIF_SUPPORTED /* GIF image file format */
|
---|
129 | #define PPM_SUPPORTED /* PBMPLUS PPM/PGM image file format */
|
---|
130 | #undef RLE_SUPPORTED /* Utah RLE image file format */
|
---|
131 | #define TARGA_SUPPORTED /* Targa image file format */
|
---|
132 |
|
---|
133 | /* Define this if you want to name both input and output files on the command
|
---|
134 | * line, rather than using stdout and optionally stdin. You MUST do this if
|
---|
135 | * your system can't cope with binary I/O to stdin/stdout. See comments at
|
---|
136 | * head of cjpeg.c or djpeg.c.
|
---|
137 | */
|
---|
138 | #undef TWO_FILE_COMMANDLINE
|
---|
139 | #define USE_SETMODE
|
---|
140 |
|
---|
141 | /* Define this if your system needs explicit cleanup of temporary files.
|
---|
142 | * This is crucial under MS-DOS, where the temporary "files" may be areas
|
---|
143 | * of extended memory; on most other systems it's not as important.
|
---|
144 | */
|
---|
145 | #undef NEED_SIGNAL_CATCHER
|
---|
146 |
|
---|
147 | /* By default, we open image files with fopen(...,"rb") or fopen(...,"wb").
|
---|
148 | * This is necessary on systems that distinguish text files from binary files,
|
---|
149 | * and is harmless on most systems that don't. If you have one of the rare
|
---|
150 | * systems that complains about the "b" spec, define this symbol.
|
---|
151 | */
|
---|
152 | #undef DONT_USE_B_MODE
|
---|
153 |
|
---|
154 | /* Define this if you want percent-done progress reports from cjpeg/djpeg.
|
---|
155 | */
|
---|
156 | #undef PROGRESS_REPORT
|
---|
157 |
|
---|
158 |
|
---|
159 | #endif /* JPEG_CJPEG_DJPEG */
|
---|