Xerox DocuCentre SC2020, User Manual

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Before Using the Device
Xerox
®
DocuCentre
®
SC2020
User Guide
23
JPEG Library
Independent JPEG Group's free JPEG software
This package contains C software to implement JPEG image encoding, decoding, and trans-coding. JPEG is
a standardized compression method for full-color and gray-scale images.
The distributed programs provide conversion between JPEG "JFIF" format and image files in PBMPLUS
PPM/PGM, GIF, BMP, and Targa file formats. The core compression and decompression library can easily be
reused in other programs, such as image viewers. The package is highly portable C code; we have tested it
on many devices ranging from PCs to Crays.
We are releasing this software for both noncommercial and commercial use. Companies are welcome to
use it as the basis for JPEG-related products. We do not ask a royalty, although we do ask for an
acknowledgement in product literature (see the README file in the distribution for details). We hope to
make this software industrial-quality --- although, as with anything that's free, we offer no warranty and
accept no liability. For more information, contact jpeg-info@jpegclub.org.
Contents of this directory
jpegsrc.vN.tar.gz contains source code, documentation, and test files for release N in Unix format.
jpegsrN.zip contains source code, documentation, and test files for release N in Windows format.
jpegaltui.vN.tar.gz contains source code for an alternate user interface for cjpeg/djpeg in Unix format.
jpegaltuiN.zip contains source code for an alternate user interface for cjpeg/djpeg in Windows format.
wallace.ps.gz is a PostScript file of Greg Wallace's introductory article about JPEG. This is an update of the
article that appeared in the April 1991 Communications of the ACM. jpeg.documents.gz tells where to
obtain the JPEG standard and documents about JPEG-related file formats. jfif.ps.gz is a PostScript file of
the JFIF (JPEG File Interchange Format) format specification. jfif.txt.gz is a plain text transcription of the
JFIF specification; it's missing a figure, so use the PostScript version if you can. TIFFTechNote2.txt.gz is a
draft of the proposed revisions to TIFF 6.0's JPEG support. pm.errata.gz is the errata list for the first
printing of the textbook "JPEG Still Image Data Compression Standard" by Pennebaker and Mitchell.
jdosaobj.zip contains pre-assembled object files for JMEMDOSA.ASM. If you want to compile the IJG code
for MS-DOS, but don't have an assembler, these files may be helpful.
Math Library
Copyright
©
1993 by Sun Microsystems, Inc. All rights reserved Developed at SunPro, a Sun Microsystems,
Inc. business. Permission to use, copy, modify, and distribute this software is freely granted, provided that
this notice is preserved.
• copysignf.c: * Copyright
©
1993 by Sun Microsystems, Inc. All rights reserved.
• math_private.h: * Copyright
©
1993 by Sun Microsystems, Inc. All rights reserved.
• powf.c: * Copyright
©
1993 by Sun Microsystems, Inc. All rights reserved.
• scalbnf.c: * Copyright
©
1993 by Sun Microsystems, Inc. All rights reserved.