| IJG JPEG LIBRARY: FILE LIST | |
| Copyright (C) 1994-2009, Thomas G. Lane, Guido Vollbeding. | |
| This file is part of the Independent JPEG Group's software. | |
| For conditions of distribution and use, see the accompanying README file. | |
| Here is a road map to the files in the IJG JPEG distribution. The | |
| distribution includes the JPEG library proper, plus two application | |
| programs ("cjpeg" and "djpeg") which use the library to convert JPEG | |
| files to and from some other popular image formats. A third application | |
| "jpegtran" uses the library to do lossless conversion between different | |
| variants of JPEG. There are also two stand-alone applications, | |
| "rdjpgcom" and "wrjpgcom". | |
| THE JPEG LIBRARY | |
| ================ | |
| Include files: | |
| jpeglib.h JPEG library's exported data and function declarations. | |
| jconfig.h Configuration declarations. Note: this file is not present | |
| in the distribution; it is generated during installation. | |
| jmorecfg.h Additional configuration declarations; need not be changed | |
| for a standard installation. | |
| jerror.h Declares JPEG library's error and trace message codes. | |
| jinclude.h Central include file used by all IJG .c files to reference | |
| system include files. | |
| jpegint.h JPEG library's internal data structures. | |
| jdct.h Private declarations for forward & reverse DCT subsystems. | |
| jmemsys.h Private declarations for memory management subsystem. | |
| jversion.h Version information. | |
| Applications using the library should include jpeglib.h (which in turn | |
| includes jconfig.h and jmorecfg.h). Optionally, jerror.h may be included | |
| if the application needs to reference individual JPEG error codes. The | |
| other include files are intended for internal use and would not normally | |
| be included by an application program. (cjpeg/djpeg/etc do use jinclude.h, | |
| since its function is to improve portability of the whole IJG distribution. | |
| Most other applications will directly include the system include files they | |
| want, and hence won't need jinclude.h.) | |
| C source code files: | |
| These files contain most of the functions intended to be called directly by | |
| an application program: | |
| jcapimin.c Application program interface: core routines for compression. | |
| jcapistd.c Application program interface: standard compression. | |
| jdapimin.c Application program interface: core routines for decompression. | |
| jdapistd.c Application program interface: standard decompression. | |
| jcomapi.c Application program interface routines common to compression | |
| and decompression. | |
| jcparam.c Compression parameter setting helper routines. | |
| jctrans.c API and library routines for transcoding compression. | |
| jdtrans.c API and library routines for transcoding decompression. | |
| Compression side of the library: | |
| jcinit.c Initialization: determines which other modules to use. | |
| jcmaster.c Master control: setup and inter-pass sequencing logic. | |
| jcmainct.c Main buffer controller (preprocessor => JPEG compressor). | |
| jcprepct.c Preprocessor buffer controller. | |
| jccoefct.c Buffer controller for DCT coefficient buffer. | |
| jccolor.c Color space conversion. | |
| jcsample.c Downsampling. | |
| jcdctmgr.c DCT manager (DCT implementation selection & control). | |
| jfdctint.c Forward DCT using slow-but-accurate integer method. | |
| jfdctfst.c Forward DCT using faster, less accurate integer method. | |
| jfdctflt.c Forward DCT using floating-point arithmetic. | |
| jchuff.c Huffman entropy coding. | |
| jcarith.c Arithmetic entropy coding. | |
| jcmarker.c JPEG marker writing. | |
| jdatadst.c Data destination managers for memory and stdio output. | |
| Decompression side of the library: | |
| jdmaster.c Master control: determines which other modules to use. | |
| jdinput.c Input controller: controls input processing modules. | |
| jdmainct.c Main buffer controller (JPEG decompressor => postprocessor). | |
| jdcoefct.c Buffer controller for DCT coefficient buffer. | |
| jdpostct.c Postprocessor buffer controller. | |
| jdmarker.c JPEG marker reading. | |
| jdhuff.c Huffman entropy decoding. | |
| jdarith.c Arithmetic entropy decoding. | |
| jddctmgr.c IDCT manager (IDCT implementation selection & control). | |
| jidctint.c Inverse DCT using slow-but-accurate integer method. | |
| jidctfst.c Inverse DCT using faster, less accurate integer method. | |
| jidctflt.c Inverse DCT using floating-point arithmetic. | |
| jdsample.c Upsampling. | |
| jdcolor.c Color space conversion. | |
| jdmerge.c Merged upsampling/color conversion (faster, lower quality). | |
| jquant1.c One-pass color quantization using a fixed-spacing colormap. | |
| jquant2.c Two-pass color quantization using a custom-generated colormap. | |
| Also handles one-pass quantization to an externally given map. | |
| jdatasrc.c Data source managers for memory and stdio input. | |
| Support files for both compression and decompression: | |
| jaricom.c Tables for common use in arithmetic entropy encoding and | |
| decoding routines. | |
| jerror.c Standard error handling routines (application replaceable). | |
| jmemmgr.c System-independent (more or less) memory management code. | |
| jutils.c Miscellaneous utility routines. | |
| jmemmgr.c relies on a system-dependent memory management module. The IJG | |
| distribution includes the following implementations of the system-dependent | |
| module: | |
| jmemnobs.c "No backing store": assumes adequate virtual memory exists. | |
| jmemansi.c Makes temporary files with ANSI-standard routine tmpfile(). | |
| jmemname.c Makes temporary files with program-generated file names. | |
| jmemdos.c Custom implementation for MS-DOS (16-bit environment only): | |
| can use extended and expanded memory as well as temp files. | |
| jmemmac.c Custom implementation for Apple Macintosh. | |
| Exactly one of the system-dependent modules should be configured into an | |
| installed JPEG library (see install.txt for hints about which one to use). | |
| On unusual systems you may find it worthwhile to make a special | |
| system-dependent memory manager. | |
| Non-C source code files: | |
| jmemdosa.asm 80x86 assembly code support for jmemdos.c; used only in | |
| MS-DOS-specific configurations of the JPEG library. | |
| CJPEG/DJPEG/JPEGTRAN | |
| ==================== | |
| Include files: | |
| cdjpeg.h Declarations shared by cjpeg/djpeg/jpegtran modules. | |
| cderror.h Additional error and trace message codes for cjpeg et al. | |
| transupp.h Declarations for jpegtran support routines in transupp.c. | |
| C source code files: | |
| cjpeg.c Main program for cjpeg. | |
| djpeg.c Main program for djpeg. | |
| jpegtran.c Main program for jpegtran. | |
| cdjpeg.c Utility routines used by all three programs. | |
| rdcolmap.c Code to read a colormap file for djpeg's "-map" switch. | |
| rdswitch.c Code to process some of cjpeg's more complex switches. | |
| Also used by jpegtran. | |
| transupp.c Support code for jpegtran: lossless image manipulations. | |
| Image file reader modules for cjpeg: | |
| rdbmp.c BMP file input. | |
| rdgif.c GIF file input (now just a stub). | |
| rdppm.c PPM/PGM file input. | |
| rdrle.c Utah RLE file input. | |
| rdtarga.c Targa file input. | |
| Image file writer modules for djpeg: | |
| wrbmp.c BMP file output. | |
| wrgif.c GIF file output (a mere shadow of its former self). | |
| wrppm.c PPM/PGM file output. | |
| wrrle.c Utah RLE file output. | |
| wrtarga.c Targa file output. | |
| RDJPGCOM/WRJPGCOM | |
| ================= | |
| C source code files: | |
| rdjpgcom.c Stand-alone rdjpgcom application. | |
| wrjpgcom.c Stand-alone wrjpgcom application. | |
| These programs do not depend on the IJG library. They do use | |
| jconfig.h and jinclude.h, only to improve portability. | |
| ADDITIONAL FILES | |
| ================ | |
| Documentation (see README for a guide to the documentation files): | |
| README Master documentation file. | |
| *.txt Other documentation files. | |
| *.1 Documentation in Unix man page format. | |
| change.log Version-to-version change highlights. | |
| example.c Sample code for calling JPEG library. | |
| Configuration/installation files and programs (see install.txt for more info): | |
| configure Unix shell script to perform automatic configuration. | |
| configure.ac Source file for use with Autoconf to generate configure. | |
| ltmain.sh Support scripts for configure (from GNU libtool). | |
| config.guess | |
| config.sub | |
| depcomp | |
| missing | |
| install-sh Install shell script for those Unix systems lacking one. | |
| Makefile.in Makefile input for configure. | |
| Makefile.am Source file for use with Automake to generate Makefile.in. | |
| ckconfig.c Program to generate jconfig.h on non-Unix systems. | |
| jconfig.txt Template for making jconfig.h by hand. | |
| mak*.* Sample makefiles for particular systems. | |
| jconfig.* Sample jconfig.h for particular systems. | |
| libjpeg.map Script to generate shared library with versioned symbols. | |
| aclocal.m4 M4 macro definitions for use with Autoconf. | |
| ansi2knr.c De-ANSIfier for pre-ANSI C compilers (courtesy of | |
| L. Peter Deutsch and Aladdin Enterprises). | |
| Test files (see install.txt for test procedure): | |
| test*.* Source and comparison files for confidence test. | |
| These are binary image files, NOT text files. |