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.
8 * This file documents the configuration options that are required to
9 * customize the JPEG software for a particular system.
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.
16 * DO NOT EDIT THIS FILE --- IT WON'T ACCOMPLISH ANYTHING.
17 * EDIT A COPY NAMED JCONFIG.H.
22 * These symbols indicate the properties of your machine or compiler.
23 * #define the symbol if yes, #undef it if no.
26 /* Does your compiler support function prototypes?
27 * (If not, you also need to use ansi2knr, see install.txt)
29 #define HAVE_PROTOTYPES
31 /* Does your compiler support the declaration "unsigned char" ?
32 * How about "unsigned short" ?
34 #define HAVE_UNSIGNED_CHAR
35 #define HAVE_UNSIGNED_SHORT
37 /* Define "void" as "char" if your compiler doesn't know about type void.
38 * NOTE: be sure to define void such that "void *" represents the most general
39 * pointer type, e.g., that returned by malloc().
41 /* #define void char */
43 /* Define "const" as empty if your compiler doesn't know the "const" keyword.
47 /* Define this if an ordinary "char" type is unsigned.
48 * If you're not sure, leaving it undefined will work at some cost in speed.
49 * If you defined HAVE_UNSIGNED_CHAR then the speed difference is minimal.
51 #undef CHAR_IS_UNSIGNED
53 /* Define this if your system has an ANSI-conforming <stddef.h> file.
57 /* Define this if your system has an ANSI-conforming <stdlib.h> file.
61 /* Define this if your system does not have an ANSI/SysV <string.h>,
62 * but does have a BSD-style <strings.h>.
64 #undef NEED_BSD_STRINGS
66 /* Define this if your system does not provide typedef size_t in any of the
67 * ANSI-standard places (stddef.h, stdlib.h, or stdio.h), but places it in
68 * <sys/types.h> instead.
70 #undef NEED_SYS_TYPES_H
72 /* For 80x86 machines, you need to define NEED_FAR_POINTERS,
73 * unless you are using a large-data memory model or 80386 flat-memory mode.
74 * On less brain-damaged CPUs this symbol must not be defined.
75 * (Defining this symbol causes large data structures to be referenced through
76 * "far" pointers and to be allocated with a special version of malloc.)
78 #undef NEED_FAR_POINTERS
80 /* Define this if your linker needs global names to be unique in less
81 * than the first 15 characters.
83 #undef NEED_SHORT_EXTERNAL_NAMES
85 /* Although a real ANSI C compiler can deal perfectly well with pointers to
86 * unspecified structures (see "incomplete types" in the spec), a few pre-ANSI
87 * and pseudo-ANSI compilers get confused. To keep one of these bozos happy,
88 * define INCOMPLETE_TYPES_BROKEN. This is not recommended unless you
89 * actually get "missing structure definition" warnings or errors while
90 * compiling the JPEG code.
92 #undef INCOMPLETE_TYPES_BROKEN
94 /* Define "boolean" as unsigned char, not int, on Windows systems.
97 #ifndef __RPCNDR_H__ /* don't conflict if rpcndr.h already read */
98 typedef unsigned char boolean;
100 #define HAVE_BOOLEAN /* prevent jmorecfg.h from redefining it */
105 * The following options affect code selection within the JPEG library,
106 * but they don't need to be visible to applications using the library.
107 * To minimize application namespace pollution, the symbols won't be
108 * defined unless JPEG_INTERNALS has been defined.
111 #ifdef JPEG_INTERNALS
113 /* Define this if your compiler implements ">>" on signed values as a logical
114 * (unsigned) shift; leave it undefined if ">>" is a signed (arithmetic) shift,
115 * which is the normal and rational definition.
117 #undef RIGHT_SHIFT_IS_UNSIGNED
120 #endif /* JPEG_INTERNALS */
124 * The remaining options do not affect the JPEG library proper,
125 * but only the sample applications cjpeg/djpeg (see cjpeg.c, djpeg.c).
126 * Other applications can ignore these.
129 #ifdef JPEG_CJPEG_DJPEG
131 /* These defines indicate which image (non-JPEG) file formats are allowed. */
133 #define BMP_SUPPORTED /* BMP image file format */
134 #define GIF_SUPPORTED /* GIF image file format */
135 #define PPM_SUPPORTED /* PBMPLUS PPM/PGM image file format */
136 #undef RLE_SUPPORTED /* Utah RLE image file format */
137 #define TARGA_SUPPORTED /* Targa image file format */
139 /* Define this if you want to name both input and output files on the command
140 * line, rather than using stdout and optionally stdin. You MUST do this if
141 * your system can't cope with binary I/O to stdin/stdout. See comments at
142 * head of cjpeg.c or djpeg.c.
144 #undef TWO_FILE_COMMANDLINE
146 /* Define this if your system needs explicit cleanup of temporary files.
147 * This is crucial under MS-DOS, where the temporary "files" may be areas
148 * of extended memory; on most other systems it's not as important.
150 #undef NEED_SIGNAL_CATCHER
152 /* By default, we open image files with fopen(...,"rb") or fopen(...,"wb").
153 * This is necessary on systems that distinguish text files from binary files,
154 * and is harmless on most systems that don't. If you have one of the rare
155 * systems that complains about the "b" spec, define this symbol.
157 #undef DONT_USE_B_MODE
159 /* Define this if you want percent-done progress reports from cjpeg/djpeg.
161 #undef PROGRESS_REPORT
164 #endif /* JPEG_CJPEG_DJPEG */