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In legalese:
The authors make NO WARRANTY
or representation, either express or
implied, with respect to this software,
its quality, accuracy, merchantability,
or fitness for a particular purpose.
This software is provided "AS IS",
and you, its user, assume the entire
risk as to its quality and accuracy.
This software is copyright (C) 1991-
1998, Thomas G. Lane.
All Rights Reserved except as speci-
fied below.
Permission is hereby granted to use,
copy, modify, and distribute this soft-
ware (or portions thereof) for any
purpose, without fee, subject to these
conditions:
(1)
If any part of the source code for this
software is distributed, then this RE-
ADME file must be included, with this
copyright and no-warranty notice un-
altered; and any additions, deletions,
or changes to the original files must be
clearly indicated in accompanying
documentation.
(2)
If only executable code is distributed,
then the accompanying documenta-
tion must state that "this software is
based in part on the work of the Inde-
pendent JPEG Group".
(3)
Permission for use of this software is
granted only if the user accepts full re-
sponsibility for any undesirable con-
sequences; the authors accept NO
LIABILITY for damages of any kind.
These conditions apply to any soft-
ware derived from or based on the
IJG code, not just to the unmodified li-
brary. If you use our work, you ought
to acknowledge us.
Permission is NOT granted for the
use of any IJG author's name or com-
pany name in advertising or publicity
relating to this software or products
derived from it. This software may be
referred to only as "the Independent
JPEG Group's software".
We specifically permit and encourage
the use of this software as the basis of
commercial products, provided that
all warranty or liability claims are as-
sumed by the product vendor.
ansi2knr.c is included in this distribu-
tion by permission of L. Peter Deut-
sch, sole proprietor of its copyright
holder, Aladdin Enterprises of Menlo
Park, CA. ansi2knr.c is NOT covered
by the above copyright and condi-
tions, but instead by the usual distri-
bution terms of the Free Software
Foundation; principally, that you
must include source code if you redis-
tribute it. (See the file ansi2knr.c for
f u l l d e t a i l s . ) H o w e v e r , s i n c e
ansi2knr.c is not needed as part of any
program generated from the IJG code,
this does not limit you more than the
foregoing paragraphs do.
The Unix configuration script "con-
figure" was produced with GNU Au-
toconf. It is copyright by the Free
Software Foundation but is freely dis-
tributable. The same holds for its sup-
porting scripts (config. guess, config.
sub, ltconfig, ltmain. sh). Another
support script, install-sh, is copyright
by M. I. T. but is also freely distribut-
able.
It appears that the arithmetic coding
option of the JPEG spec is covered by
patents owned by IBM, AT&T, and
Mitsubishi. Hence arithmetic coding
cannot legally be used without ob-
taining one or more licenses. For this
reason, support for arithmetic coding
has been removed from the free JPEG
software. (Since arithmetic coding
provides only a marginal gain over
the unpatented Huffman mode, it is
unlikely that very many implementa-
tions will support it. ) So far as we are
aware, there are no patent restrictions
on the remaining code.
Software Information
217
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