| 1 | IJG JPEG LIBRARY: FILE LIST
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| 2 |
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| 3 | Copyright (C) 1994-2009, Thomas G. Lane, Guido Vollbeding.
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| 4 | This file is part of the Independent JPEG Group's software.
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| 5 | For conditions of distribution and use, see the accompanying README file.
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| 6 |
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| 7 |
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| 8 | Here is a road map to the files in the IJG JPEG distribution. The
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| 9 | distribution includes the JPEG library proper, plus two application
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| 10 | programs ("cjpeg" and "djpeg") which use the library to convert JPEG
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| 11 | files to and from some other popular image formats. A third application
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| 12 | "jpegtran" uses the library to do lossless conversion between different
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| 13 | variants of JPEG. There are also two stand-alone applications,
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| 14 | "rdjpgcom" and "wrjpgcom".
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| 15 |
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| 16 |
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| 17 | THE JPEG LIBRARY
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| 18 | ================
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| 19 |
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| 20 | Include files:
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| 21 |
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| 22 | jpeglib.h JPEG library's exported data and function declarations.
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| 23 | jconfig.h Configuration declarations. Note: this file is not present
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| 24 | in the distribution; it is generated during installation.
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| 25 | jmorecfg.h Additional configuration declarations; need not be changed
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| 26 | for a standard installation.
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| 27 | jerror.h Declares JPEG library's error and trace message codes.
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| 28 | jinclude.h Central include file used by all IJG .c files to reference
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| 29 | system include files.
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| 30 | jpegint.h JPEG library's internal data structures.
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| 31 | jdct.h Private declarations for forward & reverse DCT subsystems.
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| 32 | jmemsys.h Private declarations for memory management subsystem.
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| 33 | jversion.h Version information.
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| 34 |
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| 35 | Applications using the library should include jpeglib.h (which in turn
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| 36 | includes jconfig.h and jmorecfg.h). Optionally, jerror.h may be included
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| 37 | if the application needs to reference individual JPEG error codes. The
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| 38 | other include files are intended for internal use and would not normally
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| 39 | be included by an application program. (cjpeg/djpeg/etc do use jinclude.h,
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| 40 | since its function is to improve portability of the whole IJG distribution.
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| 41 | Most other applications will directly include the system include files they
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| 42 | want, and hence won't need jinclude.h.)
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| 43 |
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| 44 |
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| 45 | C source code files:
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| 46 |
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| 47 | These files contain most of the functions intended to be called directly by
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| 48 | an application program:
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| 49 |
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| 50 | jcapimin.c Application program interface: core routines for compression.
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| 51 | jcapistd.c Application program interface: standard compression.
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| 52 | jdapimin.c Application program interface: core routines for decompression.
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| 53 | jdapistd.c Application program interface: standard decompression.
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| 54 | jcomapi.c Application program interface routines common to compression
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| 55 | and decompression.
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| 56 | jcparam.c Compression parameter setting helper routines.
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| 57 | jctrans.c API and library routines for transcoding compression.
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| 58 | jdtrans.c API and library routines for transcoding decompression.
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| 59 |
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| 60 | Compression side of the library:
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| 61 |
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| 62 | jcinit.c Initialization: determines which other modules to use.
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| 63 | jcmaster.c Master control: setup and inter-pass sequencing logic.
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| 64 | jcmainct.c Main buffer controller (preprocessor => JPEG compressor).
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| 65 | jcprepct.c Preprocessor buffer controller.
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| 66 | jccoefct.c Buffer controller for DCT coefficient buffer.
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| 67 | jccolor.c Color space conversion.
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| 68 | jcsample.c Downsampling.
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| 69 | jcdctmgr.c DCT manager (DCT implementation selection & control).
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| 70 | jfdctint.c Forward DCT using slow-but-accurate integer method.
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| 71 | jfdctfst.c Forward DCT using faster, less accurate integer method.
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| 72 | jfdctflt.c Forward DCT using floating-point arithmetic.
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| 73 | jchuff.c Huffman entropy coding.
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| 74 | jcarith.c Arithmetic entropy coding.
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| 75 | jcmarker.c JPEG marker writing.
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| 76 | jdatadst.c Data destination managers for memory and stdio output.
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| 77 |
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| 78 | Decompression side of the library:
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| 79 |
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| 80 | jdmaster.c Master control: determines which other modules to use.
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| 81 | jdinput.c Input controller: controls input processing modules.
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| 82 | jdmainct.c Main buffer controller (JPEG decompressor => postprocessor).
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| 83 | jdcoefct.c Buffer controller for DCT coefficient buffer.
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| 84 | jdpostct.c Postprocessor buffer controller.
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| 85 | jdmarker.c JPEG marker reading.
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| 86 | jdhuff.c Huffman entropy decoding.
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| 87 | jdarith.c Arithmetic entropy decoding.
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| 88 | jddctmgr.c IDCT manager (IDCT implementation selection & control).
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| 89 | jidctint.c Inverse DCT using slow-but-accurate integer method.
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| 90 | jidctfst.c Inverse DCT using faster, less accurate integer method.
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| 91 | jidctflt.c Inverse DCT using floating-point arithmetic.
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| 92 | jdsample.c Upsampling.
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| 93 | jdcolor.c Color space conversion.
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| 94 | jdmerge.c Merged upsampling/color conversion (faster, lower quality).
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| 95 | jquant1.c One-pass color quantization using a fixed-spacing colormap.
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| 96 | jquant2.c Two-pass color quantization using a custom-generated colormap.
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| 97 | Also handles one-pass quantization to an externally given map.
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| 98 | jdatasrc.c Data source managers for memory and stdio input.
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| 99 |
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| 100 | Support files for both compression and decompression:
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| 101 |
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| 102 | jaricom.c Tables for common use in arithmetic entropy encoding and
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| 103 | decoding routines.
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| 104 | jerror.c Standard error handling routines (application replaceable).
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| 105 | jmemmgr.c System-independent (more or less) memory management code.
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| 106 | jutils.c Miscellaneous utility routines.
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| 107 |
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| 108 | jmemmgr.c relies on a system-dependent memory management module. The IJG
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| 109 | distribution includes the following implementations of the system-dependent
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| 110 | module:
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| 111 |
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| 112 | jmemnobs.c "No backing store": assumes adequate virtual memory exists.
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| 113 | jmemansi.c Makes temporary files with ANSI-standard routine tmpfile().
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| 114 | jmemname.c Makes temporary files with program-generated file names.
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| 115 | jmemdos.c Custom implementation for MS-DOS (16-bit environment only):
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| 116 | can use extended and expanded memory as well as temp files.
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| 117 | jmemmac.c Custom implementation for Apple Macintosh.
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| 118 |
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| 119 | Exactly one of the system-dependent modules should be configured into an
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| 120 | installed JPEG library (see install.txt for hints about which one to use).
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| 121 | On unusual systems you may find it worthwhile to make a special
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| 122 | system-dependent memory manager.
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| 123 |
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| 124 |
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| 125 | Non-C source code files:
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| 126 |
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| 127 | jmemdosa.asm 80x86 assembly code support for jmemdos.c; used only in
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| 128 | MS-DOS-specific configurations of the JPEG library.
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| 129 |
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| 130 |
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| 131 | CJPEG/DJPEG/JPEGTRAN
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| 132 | ====================
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| 133 |
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| 134 | Include files:
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| 135 |
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| 136 | cdjpeg.h Declarations shared by cjpeg/djpeg/jpegtran modules.
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| 137 | cderror.h Additional error and trace message codes for cjpeg et al.
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| 138 | transupp.h Declarations for jpegtran support routines in transupp.c.
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| 139 |
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| 140 | C source code files:
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| 141 |
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| 142 | cjpeg.c Main program for cjpeg.
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| 143 | djpeg.c Main program for djpeg.
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| 144 | jpegtran.c Main program for jpegtran.
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| 145 | cdjpeg.c Utility routines used by all three programs.
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| 146 | rdcolmap.c Code to read a colormap file for djpeg's "-map" switch.
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| 147 | rdswitch.c Code to process some of cjpeg's more complex switches.
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| 148 | Also used by jpegtran.
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| 149 | transupp.c Support code for jpegtran: lossless image manipulations.
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| 150 |
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| 151 | Image file reader modules for cjpeg:
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| 152 |
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| 153 | rdbmp.c BMP file input.
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| 154 | rdgif.c GIF file input (now just a stub).
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| 155 | rdppm.c PPM/PGM file input.
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| 156 | rdrle.c Utah RLE file input.
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| 157 | rdtarga.c Targa file input.
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| 158 |
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| 159 | Image file writer modules for djpeg:
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| 160 |
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| 161 | wrbmp.c BMP file output.
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| 162 | wrgif.c GIF file output (a mere shadow of its former self).
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| 163 | wrppm.c PPM/PGM file output.
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| 164 | wrrle.c Utah RLE file output.
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| 165 | wrtarga.c Targa file output.
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| 166 |
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| 167 |
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| 168 | RDJPGCOM/WRJPGCOM
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| 169 | =================
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| 170 |
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| 171 | C source code files:
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| 172 |
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| 173 | rdjpgcom.c Stand-alone rdjpgcom application.
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| 174 | wrjpgcom.c Stand-alone wrjpgcom application.
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| 175 |
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| 176 | These programs do not depend on the IJG library. They do use
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| 177 | jconfig.h and jinclude.h, only to improve portability.
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| 178 |
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| 179 |
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| 180 | ADDITIONAL FILES
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| 181 | ================
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| 182 |
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| 183 | Documentation (see README for a guide to the documentation files):
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| 184 |
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| 185 | README Master documentation file.
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| 186 | *.txt Other documentation files.
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| 187 | *.1 Documentation in Unix man page format.
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| 188 | change.log Version-to-version change highlights.
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| 189 | example.c Sample code for calling JPEG library.
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| 190 |
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| 191 | Configuration/installation files and programs (see install.txt for more info):
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| 192 |
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| 193 | configure Unix shell script to perform automatic configuration.
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| 194 | configure.ac Source file for use with Autoconf to generate configure.
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| 195 | ltmain.sh Support scripts for configure (from GNU libtool).
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| 196 | config.guess
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| 197 | config.sub
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| 198 | depcomp
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| 199 | missing
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| 200 | install-sh Install shell script for those Unix systems lacking one.
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| 201 | Makefile.in Makefile input for configure.
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| 202 | Makefile.am Source file for use with Automake to generate Makefile.in.
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| 203 | ckconfig.c Program to generate jconfig.h on non-Unix systems.
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| 204 | jconfig.txt Template for making jconfig.h by hand.
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| 205 | mak*.* Sample makefiles for particular systems.
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| 206 | jconfig.* Sample jconfig.h for particular systems.
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| 207 | libjpeg.map Script to generate shared library with versioned symbols.
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| 208 | aclocal.m4 M4 macro definitions for use with Autoconf.
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| 209 | ansi2knr.c De-ANSIfier for pre-ANSI C compilers (courtesy of
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| 210 | L. Peter Deutsch and Aladdin Enterprises).
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| 211 |
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| 212 | Test files (see install.txt for test procedure):
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| 213 |
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| 214 | test*.* Source and comparison files for confidence test.
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| 215 | These are binary image files, NOT text files.
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