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ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4. The directory name has changed: no version number in the expanded directory now.
author Franz Glasner <fzglas.hg@dom66.de>
date Mon, 15 Sep 2025 11:43:07 +0200
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1 IJG JPEG LIBRARY: FILE LIST
2
3 Copyright (C) 1994-2020, Thomas G. Lane, Guido Vollbeding.
4 This file is part of the Independent JPEG Group's software.
5 For conditions of distribution and use, see the accompanying README file.
6
7
8 Here is a road map to the files in the IJG JPEG distribution. The
9 distribution includes the JPEG library proper, plus two application
10 programs ("cjpeg" and "djpeg") which use the library to convert JPEG
11 files to and from some other popular image formats. A third application
12 "jpegtran" uses the library to do lossless conversion between different
13 variants of JPEG. There are also two stand-alone applications,
14 "rdjpgcom" and "wrjpgcom".
15
16
17 THE JPEG LIBRARY
18 ================
19
20 Include files:
21
22 jpeglib.h JPEG library's exported data and function declarations.
23 jconfig.h Configuration declarations. Note: this file is not present
24 in the distribution; it is generated during installation.
25 jmorecfg.h Additional configuration declarations; need not be changed
26 for a standard installation.
27 jerror.h Declares JPEG library's error and trace message codes.
28 jinclude.h Central include file used by all IJG .c files to reference
29 system include files.
30 jpegint.h JPEG library's internal data structures.
31 jdct.h Private declarations for forward & reverse DCT subsystems.
32 jmemsys.h Private declarations for memory management subsystem.
33 jversion.h Version information.
34
35 Applications using the library should include jpeglib.h (which in turn
36 includes jconfig.h and jmorecfg.h). Optionally, jerror.h may be included
37 if the application needs to reference individual JPEG error codes. The
38 other include files are intended for internal use and would not normally
39 be included by an application program. (cjpeg/djpeg/etc do use jinclude.h,
40 since its function is to improve portability of the whole IJG distribution.
41 Most other applications will directly include the system include files they
42 want, and hence won't need jinclude.h.)
43
44
45 C source code files:
46
47 These files contain most of the functions intended to be called directly by
48 an application program:
49
50 jcapimin.c Application program interface: core routines for compression.
51 jcapistd.c Application program interface: standard compression.
52 jdapimin.c Application program interface: core routines for decompression.
53 jdapistd.c Application program interface: standard decompression.
54 jcomapi.c Application program interface routines common to compression
55 and decompression.
56 jcparam.c Compression parameter setting helper routines.
57 jctrans.c API and library routines for transcoding compression.
58 jdtrans.c API and library routines for transcoding decompression.
59
60 Compression side of the library:
61
62 jcinit.c Initialization: determines which other modules to use.
63 jcmaster.c Master control: setup and inter-pass sequencing logic.
64 jcmainct.c Main buffer controller (preprocessor => JPEG compressor).
65 jcprepct.c Preprocessor buffer controller.
66 jccoefct.c Buffer controller for DCT coefficient buffer.
67 jccolor.c Color space conversion.
68 jcsample.c Downsampling.
69 jcdctmgr.c DCT manager (DCT implementation selection & control).
70 jfdctint.c Forward DCT using slow-but-accurate integer method.
71 jfdctfst.c Forward DCT using faster, less accurate integer method.
72 jfdctflt.c Forward DCT using floating-point arithmetic.
73 jchuff.c Huffman entropy coding.
74 jcarith.c Arithmetic entropy coding.
75 jcmarker.c JPEG marker writing.
76 jdatadst.c Data destination managers for memory and stdio output.
77
78 Decompression side of the library:
79
80 jdmaster.c Master control: determines which other modules to use.
81 jdinput.c Input controller: controls input processing modules.
82 jdmainct.c Main buffer controller (JPEG decompressor => postprocessor).
83 jdcoefct.c Buffer controller for DCT coefficient buffer.
84 jdpostct.c Postprocessor buffer controller.
85 jdmarker.c JPEG marker reading.
86 jdhuff.c Huffman entropy decoding.
87 jdarith.c Arithmetic entropy decoding.
88 jddctmgr.c IDCT manager (IDCT implementation selection & control).
89 jidctint.c Inverse DCT using slow-but-accurate integer method.
90 jidctfst.c Inverse DCT using faster, less accurate integer method.
91 jidctflt.c Inverse DCT using floating-point arithmetic.
92 jdsample.c Upsampling.
93 jdcolor.c Color space conversion.
94 jdmerge.c Merged upsampling/color conversion (faster, lower quality).
95 jquant1.c One-pass color quantization using a fixed-spacing colormap.
96 jquant2.c Two-pass color quantization using a custom-generated colormap.
97 Also handles one-pass quantization to an externally given map.
98 jdatasrc.c Data source managers for memory and stdio input.
99
100 Support files for both compression and decompression:
101
102 jaricom.c Tables for common use in arithmetic entropy encoding and
103 decoding routines.
104 jerror.c Standard error handling routines (application replaceable).
105 jmemmgr.c System-independent (more or less) memory management code.
106 jutils.c Miscellaneous utility routines.
107
108 jmemmgr.c relies on a system-dependent memory management module. The IJG
109 distribution includes the following implementations of the system-dependent
110 module:
111
112 jmemnobs.c "No backing store": assumes adequate virtual memory exists.
113 jmemansi.c Makes temporary files with ANSI-standard routine tmpfile().
114 jmemname.c Makes temporary files with program-generated file names.
115 jmemdos.c Custom implementation for MS-DOS (16-bit environment only):
116 can use extended and expanded memory as well as temp files.
117 jmemmac.c Custom implementation for Apple Macintosh.
118
119 Exactly one of the system-dependent modules should be configured into an
120 installed JPEG library (see install.txt for hints about which one to use).
121 On unusual systems you may find it worthwhile to make a special
122 system-dependent memory manager.
123
124
125 Non-C source code files:
126
127 jmemdosa.asm 80x86 assembly code support for jmemdos.c; used only in
128 MS-DOS-specific configurations of the JPEG library.
129
130
131 CJPEG/DJPEG/JPEGTRAN
132 ====================
133
134 Include files:
135
136 cdjpeg.h Declarations shared by cjpeg/djpeg/jpegtran modules.
137 cderror.h Additional error and trace message codes for cjpeg et al.
138 transupp.h Declarations for jpegtran support routines in transupp.c.
139
140 C source code files:
141
142 cjpeg.c Main program for cjpeg.
143 cjpegalt.c Main program for cjpeg with alternate user interface.
144 djpeg.c Main program for djpeg.
145 djpegalt.c Main program for djpeg with alternate user interface.
146 jpegtran.c Main program for jpegtran.
147 cdjpeg.c Utility routines used by all three programs.
148 rdcolmap.c Code to read a colormap file for djpeg's "-map" switch.
149 rdswitch.c Code to process some of cjpeg's more complex switches.
150 Also used by jpegtran.
151 transupp.c Support code for jpegtran: lossless image manipulations.
152
153 Image file reader modules for cjpeg:
154
155 rdbmp.c BMP file input.
156 rdgif.c GIF file input.
157 rdppm.c PPM/PGM file input.
158 rdrle.c Utah RLE file input.
159 rdtarga.c Targa file input.
160
161 Image file writer modules for djpeg:
162
163 wrbmp.c BMP file output.
164 wrgif.c GIF file output.
165 wrppm.c PPM/PGM file output.
166 wrrle.c Utah RLE file output.
167 wrtarga.c Targa file output.
168
169
170 RDJPGCOM/WRJPGCOM
171 =================
172
173 C source code files:
174
175 rdjpgcom.c Stand-alone rdjpgcom application.
176 wrjpgcom.c Stand-alone wrjpgcom application.
177
178 These programs do not depend on the IJG library. They do use
179 jconfig.h and jinclude.h, only to improve portability.
180
181
182 ADDITIONAL FILES
183 ================
184
185 Documentation (see README for a guide to the documentation files):
186
187 README Master documentation file.
188 *.txt Other documentation files.
189 *.1 Documentation in Unix man page format.
190 change.log Version-to-version change highlights.
191 example.c Sample code for calling JPEG library.
192
193 Configuration/installation files and programs (see install.txt for more info):
194
195 configure Unix shell script to perform automatic configuration.
196 configure.ac Source file for use with Autoconf to generate configure.
197 ltmain.sh Support scripts for configure (from GNU libtool).
198 config.guess
199 config.sub
200 depcomp
201 missing
202 ar-lib
203 compile
204 install-sh Install shell script for those Unix systems lacking one.
205 Makefile.in Makefile input for configure.
206 Makefile.am Source file for use with Automake to generate Makefile.in.
207 ckconfig.c Program to generate jconfig.h on non-Unix systems.
208 jconfig.txt Template for making jconfig.h by hand.
209 mak*.* Sample makefiles for particular systems.
210 jconfig.* Sample jconfig.h for particular systems.
211 libjpeg.map Script to generate shared library with versioned symbols.
212 libjpeg.pc.in libjpeg.pc pkg-config file input for configure.
213 aclocal.m4 M4 macro definitions for use with Autoconf.
214
215 Test files (see install.txt for test procedure):
216
217 test*.* Source and comparison files for confidence test.
218 These are binary image files, NOT text files.