130 lines
5.3 KiB
C
130 lines
5.3 KiB
C
// * jconfig.doc
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// *
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// * Copyright (C) 1991-1994, Thomas G. Lane.
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// * This file is part of the Independent JPEG Group's software.
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// * For conditions of distribution and use, see the accompanying README file.
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// *
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// * This file documents the configuration options that are required to
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// * customize the JPEG software for a particular system.
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// *
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// * The actual configuration options for a particular installation are stored
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// * in jconfig.h. On many machines, jconfig.h can be generated automatically
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// * or copied from one of the "canned" jconfig files that we supply. But if
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// * you need to generate a jconfig.h file by hand, this file tells you how.
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// *
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// * DO NOT EDIT THIS FILE --- IT WON'T ACCOMPLISH ANYTHING.
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// * EDIT A COPY NAMED JCONFIG.H.
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// * These symbols indicate the properties of your machine or compiler.
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// * #define the symbol if yes, #undef it if no.
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// Does your compiler support function prototypes?
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// * (If not, you also need to use ansi2knr, see install.doc)
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#define HAVE_PROTOTYPES
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// Does your compiler support the declaration "unsigned char" ?
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// * How about "unsigned short" ?
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#define HAVE_UNSIGNED_CHAR
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#define HAVE_UNSIGNED_SHORT
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// Define "void" as "char" if your compiler doesn't know about type void.
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// * NOTE: be sure to define void such that "void *" represents the most general
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// * pointer type, e.g., that returned by malloc().
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// #define void char
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// Define "const" as empty if your compiler doesn't know the "const" keyword.
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// #define const
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// Define this if an ordinary "char" type is unsigned.
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// * If you're not sure, leaving it undefined will work at some cost in speed.
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// * If you defined HAVE_UNSIGNED_CHAR then the speed difference is minimal.
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#define CHAR_IS_UNSIGNED
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// Define this if your system has an ANSI-conforming <stddef.h> file.
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#define HAVE_STDDEF_H
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// Define this if your system has an ANSI-conforming <stdlib.h> file.
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#define HAVE_STDLIB_H
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// Define this if your system does not have an ANSI/SysV <string.h>,
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// * but does have a BSD-style <strings.h>.
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#undef NEED_BSD_STRINGS
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// Define this if your system does not provide typedef size_t in any of the
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// * ANSI-standard places (stddef.h, stdlib.h, or stdio.h), but places it in
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// * <sys/types.h> instead.
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#undef NEED_SYS_TYPES_H
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// For 80x86 machines, you need to define NEED_FAR_POINTERS,
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// * unless you are using a large-data memory model or 80386 flat-memory mode.
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// * On less brain-damaged CPUs this symbol must not be defined.
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// * (Defining this symbol causes large data structures to be referenced through
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// * "far" pointers and to be allocated with a special version of malloc.)
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#undef NEED_FAR_POINTERS
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// Define this if your linker needs global names to be unique in less
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// * than the first 15 characters.
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#undef NEED_SHORT_EXTERNAL_NAMES
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// Although a real ANSI C compiler can deal perfectly well with pointers to
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// * unspecified structures (see "incomplete types" in the spec), a few pre-ANSI
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// * and pseudo-ANSI compilers get confused. To keep one of these bozos happy,
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// * define INCOMPLETE_TYPES_BROKEN. This is not recommended unless you
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// * actually get "missing structure definition" warnings or errors while
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// * compiling the JPEG code.
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#undef INCOMPLETE_TYPES_BROKEN
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// * The following options affect code selection within the JPEG library,
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// * but they don't need to be visible to applications using the library.
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// * To minimize application namespace pollution, the symbols won't be
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// * defined unless JPEG_INTERNALS has been defined.
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#ifdef JPEG_INTERNALS
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// Define this if your compiler implements ">>" on signed values as a logical
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// * (unsigned) shift; leave it undefined if ">>" is a signed (arithmetic) shift,
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// * which is the normal and rational definition.
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#undef RIGHT_SHIFT_IS_UNSIGNED
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#endif // JPEG_INTERNALS
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// * The remaining options do not affect the JPEG library proper,
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// * but only the sample applications cjpeg/djpeg (see cjpeg.c, djpeg.c).
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// * Other applications can ignore these.
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#ifdef JPEG_CJPEG_DJPEG
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// These defines indicate which image (non-JPEG) file formats are allowed.
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#define BMP_SUPPORTED // BMP image file format
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#define GIF_SUPPORTED // GIF image file format
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#define PPM_SUPPORTED // PBMPLUS PPM/PGM image file format
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#undef RLE_SUPPORTED // Utah RLE image file format
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#define TARGA_SUPPORTED // Targa image file format
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// Define this if you want to name both input and output files on the command
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// * line, rather than using stdout and optionally stdin. You MUST do this if
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// * your system can't cope with binary I/O to stdin/stdout. See comments at
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// * head of cjpeg.c or djpeg.c.
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#undef TWO_FILE_COMMANDLINE
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// Define this if your system needs explicit cleanup of temporary files.
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// * This is crucial under MS-DOS, where the temporary "files" may be areas
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// * of extended memory; on most other systems it's not as important.
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#undef NEED_SIGNAL_CATCHER
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// By default, we open image files with fopen(...,"rb") or fopen(...,"wb").
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// * This is necessary on systems that distinguish text files from binary files,
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// * and is harmless on most systems that don't. If you have one of the rare
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// * systems that complains about the "b" spec, define this symbol.
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#undef DONT_USE_B_MODE
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// Define this if you want percent-done progress reports from cjpeg/djpeg.
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#undef PROGRESS_REPORT
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#endif // JPEG_CJPEG_DJPEG
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