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[Wx Widget] Update jpeg to wxWidgets-2.8.12

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The Independent JPEG Group's JPEG software
==========================================
README for release 6b of 27-Mar-1998
====================================
This distribution contains the sixth public release of the Independent JPEG
Group's free JPEG software. You are welcome to redistribute this software and
to use it for any purpose, subject to the conditions under LEGAL ISSUES, below.
Serious users of this software (particularly those incorporating it into
larger programs) should contact IJG at jpeg-info@uunet.uu.net to be added to
our electronic mailing list. Mailing list members are notified of updates
and have a chance to participate in technical discussions, etc.
This software is the work of Tom Lane, Philip Gladstone, Jim Boucher,
Lee Crocker, Julian Minguillon, Luis Ortiz, George Phillips, Davide Rossi,
Guido Vollbeding, Ge' Weijers, and other members of the Independent JPEG
Group.
IJG is not affiliated with the official ISO JPEG standards committee.
DOCUMENTATION ROADMAP
=====================
This file contains the following sections:
OVERVIEW General description of JPEG and the IJG software.
LEGAL ISSUES Copyright, lack of warranty, terms of distribution.
REFERENCES Where to learn more about JPEG.
ARCHIVE LOCATIONS Where to find newer versions of this software.
RELATED SOFTWARE Other stuff you should get.
FILE FORMAT WARS Software *not* to get.
TO DO Plans for future IJG releases.
Other documentation files in the distribution are:
User documentation:
install.doc How to configure and install the IJG software.
usage.doc Usage instructions for cjpeg, djpeg, jpegtran,
rdjpgcom, and wrjpgcom.
*.1 Unix-style man pages for programs (same info as usage.doc).
wizard.doc Advanced usage instructions for JPEG wizards only.
change.log Version-to-version change highlights.
Programmer and internal documentation:
libjpeg.doc How to use the JPEG library in your own programs.
example.c Sample code for calling the JPEG library.
structure.doc Overview of the JPEG library's internal structure.
filelist.doc Road map of IJG files.
coderules.doc Coding style rules --- please read if you contribute code.
Please read at least the files install.doc and usage.doc. Useful information
can also be found in the JPEG FAQ (Frequently Asked Questions) article. See
ARCHIVE LOCATIONS below to find out where to obtain the FAQ article.
If you want to understand how the JPEG code works, we suggest reading one or
more of the REFERENCES, then looking at the documentation files (in roughly
the order listed) before diving into the code.
OVERVIEW
========
This package contains C software to implement JPEG image compression and
decompression. JPEG (pronounced "jay-peg") is a standardized compression
method for full-color and gray-scale images. JPEG is intended for compressing
"real-world" scenes; line drawings, cartoons and other non-realistic images
are not its strong suit. JPEG is lossy, meaning that the output image is not
exactly identical to the input image. Hence you must not use JPEG if you
have to have identical output bits. However, on typical photographic images,
very good compression levels can be obtained with no visible change, and
remarkably high compression levels are possible if you can tolerate a
low-quality image. For more details, see the references, or just experiment
with various compression settings.
This software implements JPEG baseline, extended-sequential, and progressive
compression processes. Provision is made for supporting all variants of these
processes, although some uncommon parameter settings aren't implemented yet.
For legal reasons, we are not distributing code for the arithmetic-coding
variants of JPEG; see LEGAL ISSUES. We have made no provision for supporting
the hierarchical or lossless processes defined in the standard.
We provide a set of library routines for reading and writing JPEG image files,
plus two sample applications "cjpeg" and "djpeg", which use the library to
perform conversion between JPEG and some other popular image file formats.
The library is intended to be reused in other applications.
In order to support file conversion and viewing software, we have included
considerable functionality beyond the bare JPEG coding/decoding capability;
for example, the color quantization modules are not strictly part of JPEG
decoding, but they are essential for output to colormapped file formats or
colormapped displays. These extra functions can be compiled out of the
library if not required for a particular application. We have also included
"jpegtran", a utility for lossless transcoding between different JPEG
processes, and "rdjpgcom" and "wrjpgcom", two simple applications for
inserting and extracting textual comments in JFIF files.
The emphasis in designing this software has been on achieving portability and
flexibility, while also making it fast enough to be useful. In particular,
the software is not intended to be read as a tutorial on JPEG. (See the
REFERENCES section for introductory material.) Rather, it is intended to
be reliable, portable, industrial-strength code. We do not claim to have
achieved that goal in every aspect of the software, but we strive for it.
We welcome the use of this software as a component of commercial products.
No royalty is required, but we do ask for an acknowledgement in product
documentation, as described under LEGAL ISSUES.
LEGAL ISSUES
============
In plain English:
1. We don't promise that this software works. (But if you find any bugs,
please let us know!)
2. You can use this software for whatever you want. You don't have to pay us.
3. You may not pretend that you wrote this software. If you use it in a
program, you must acknowledge somewhere in your documentation that
you've used the IJG code.
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 specified below.
Permission is hereby granted to use, copy, modify, and distribute this
software (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
README file must be included, with this copyright and no-warranty notice
unaltered; 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
documentation must state that "this software is based in part on the work of
the Independent JPEG Group".
(3) Permission for use of this software is granted only if the user accepts
full responsibility for any undesirable consequences; the authors accept
NO LIABILITY for damages of any kind.
These conditions apply to any software derived from or based on the IJG code,
not just to the unmodified library. If you use our work, you ought to
acknowledge us.
Permission is NOT granted for the use of any IJG author's name or company 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
assumed by the product vendor.
ansi2knr.c is included in this distribution by permission of L. Peter Deutsch,
sole proprietor of its copyright holder, Aladdin Enterprises of Menlo Park, CA.
ansi2knr.c is NOT covered by the above copyright and conditions, but instead
by the usual distribution terms of the Free Software Foundation; principally,
that you must include source code if you redistribute it. (See the file
ansi2knr.c for full details.) However, since 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 "configure" was produced with GNU Autoconf.
It is copyright by the Free Software Foundation but is freely distributable.
The same holds for its supporting scripts (config.guess, config.sub,
ltconfig, ltmain.sh). Another support script, install-sh, is copyright
by M.I.T. but is also freely distributable.
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 obtaining 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 implementations will support it.)
So far as we are aware, there are no patent restrictions on the remaining
code.
The IJG distribution formerly included code to read and write GIF files.
To avoid entanglement with the Unisys LZW patent, GIF reading support has
been removed altogether, and the GIF writer has been simplified to produce
"uncompressed GIFs". This technique does not use the LZW algorithm; the
resulting GIF files are larger than usual, but are readable by all standard
GIF decoders.
We are required to state that
"The Graphics Interchange Format(c) is the Copyright property of
CompuServe Incorporated. GIF(sm) is a Service Mark property of
CompuServe Incorporated."
REFERENCES
==========
We highly recommend reading one or more of these references before trying to
understand the innards of the JPEG software.
The best short technical introduction to the JPEG compression algorithm is
Wallace, Gregory K. "The JPEG Still Picture Compression Standard",
Communications of the ACM, April 1991 (vol. 34 no. 4), pp. 30-44.
(Adjacent articles in that issue discuss MPEG motion picture compression,
applications of JPEG, and related topics.) If you don't have the CACM issue
handy, a PostScript file containing a revised version of Wallace's article is
available at ftp://ftp.uu.net/graphics/jpeg/wallace.ps.gz. The file (actually
a preprint for an article that appeared in IEEE Trans. Consumer Electronics)
omits the sample images that appeared in CACM, but it includes corrections
and some added material. Note: the Wallace article is copyright ACM and IEEE,
and it may not be used for commercial purposes.
A somewhat less technical, more leisurely introduction to JPEG can be found in
"The Data Compression Book" by Mark Nelson and Jean-loup Gailly, published by
M&T Books (New York), 2nd ed. 1996, ISBN 1-55851-434-1. This book provides
good explanations and example C code for a multitude of compression methods
including JPEG. It is an excellent source if you are comfortable reading C
code but don't know much about data compression in general. The book's JPEG
sample code is far from industrial-strength, but when you are ready to look
at a full implementation, you've got one here...
The best full description of JPEG is the textbook "JPEG Still Image Data
Compression Standard" by William B. Pennebaker and Joan L. Mitchell, published
by Van Nostrand Reinhold, 1993, ISBN 0-442-01272-1. Price US$59.95, 638 pp.
The book includes the complete text of the ISO JPEG standards (DIS 10918-1
and draft DIS 10918-2). This is by far the most complete exposition of JPEG
in existence, and we highly recommend it.
The JPEG standard itself is not available electronically; you must order a
paper copy through ISO or ITU. (Unless you feel a need to own a certified
official copy, we recommend buying the Pennebaker and Mitchell book instead;
it's much cheaper and includes a great deal of useful explanatory material.)
In the USA, copies of the standard may be ordered from ANSI Sales at (212)
642-4900, or from Global Engineering Documents at (800) 854-7179. (ANSI
doesn't take credit card orders, but Global does.) It's not cheap: as of
1992, ANSI was charging $95 for Part 1 and $47 for Part 2, plus 7%
shipping/handling. The standard is divided into two parts, Part 1 being the
actual specification, while Part 2 covers compliance testing methods. Part 1
is titled "Digital Compression and Coding of Continuous-tone Still Images,
Part 1: Requirements and guidelines" and has document numbers ISO/IEC IS
10918-1, ITU-T T.81. Part 2 is titled "Digital Compression and Coding of
Continuous-tone Still Images, Part 2: Compliance testing" and has document
numbers ISO/IEC IS 10918-2, ITU-T T.83.
Some extensions to the original JPEG standard are defined in JPEG Part 3,
a newer ISO standard numbered ISO/IEC IS 10918-3 and ITU-T T.84. IJG
currently does not support any Part 3 extensions.
The JPEG standard does not specify all details of an interchangeable file
format. For the omitted details we follow the "JFIF" conventions, revision
1.02. A copy of the JFIF spec is available from:
Literature Department
C-Cube Microsystems, Inc.
1778 McCarthy Blvd.
Milpitas, CA 95035
phone (408) 944-6300, fax (408) 944-6314
A PostScript version of this document is available by FTP at
ftp://ftp.uu.net/graphics/jpeg/jfif.ps.gz. There is also a plain text
version at ftp://ftp.uu.net/graphics/jpeg/jfif.txt.gz, but it is missing
the figures.
The TIFF 6.0 file format specification can be obtained by FTP from
ftp://ftp.sgi.com/graphics/tiff/TIFF6.ps.gz. The JPEG incorporation scheme
found in the TIFF 6.0 spec of 3-June-92 has a number of serious problems.
IJG does not recommend use of the TIFF 6.0 design (TIFF Compression tag 6).
Instead, we recommend the JPEG design proposed by TIFF Technical Note #2
(Compression tag 7). Copies of this Note can be obtained from ftp.sgi.com or
from ftp://ftp.uu.net/graphics/jpeg/. It is expected that the next revision
of the TIFF spec will replace the 6.0 JPEG design with the Note's design.
Although IJG's own code does not support TIFF/JPEG, the free libtiff library
uses our library to implement TIFF/JPEG per the Note. libtiff is available
from ftp://ftp.sgi.com/graphics/tiff/.
ARCHIVE LOCATIONS
=================
The "official" archive site for this software is ftp.uu.net (Internet
address 192.48.96.9). The most recent released version can always be found
there in directory graphics/jpeg. This particular version will be archived
as ftp://ftp.uu.net/graphics/jpeg/jpegsrc.v6b.tar.gz. If you don't have
direct Internet access, UUNET's archives are also available via UUCP; contact
help@uunet.uu.net for information on retrieving files that way.
Numerous Internet sites maintain copies of the UUNET files. However, only
ftp.uu.net is guaranteed to have the latest official version.
You can also obtain this software in DOS-compatible "zip" archive format from
the SimTel archives (ftp://ftp.simtel.net/pub/simtelnet/msdos/graphics/), or
on CompuServe in the Graphics Support forum (GO CIS:GRAPHSUP), library 12
"JPEG Tools". Again, these versions may sometimes lag behind the ftp.uu.net
release.
The JPEG FAQ (Frequently Asked Questions) article is a useful source of
general information about JPEG. It is updated constantly and therefore is
not included in this distribution. The FAQ is posted every two weeks to
Usenet newsgroups comp.graphics.misc, news.answers, and other groups.
It is available on the World Wide Web at http://www.faqs.org/faqs/jpeg-faq/
and other news.answers archive sites, including the official news.answers
archive at rtfm.mit.edu: ftp://rtfm.mit.edu/pub/usenet/news.answers/jpeg-faq/.
If you don't have Web or FTP access, send e-mail to mail-server@rtfm.mit.edu
with body
send usenet/news.answers/jpeg-faq/part1
send usenet/news.answers/jpeg-faq/part2
RELATED SOFTWARE
================
Numerous viewing and image manipulation programs now support JPEG. (Quite a
few of them use this library to do so.) The JPEG FAQ described above lists
some of the more popular free and shareware viewers, and tells where to
obtain them on Internet.
If you are on a Unix machine, we highly recommend Jef Poskanzer's free
PBMPLUS software, which provides many useful operations on PPM-format image
files. In particular, it can convert PPM images to and from a wide range of
other formats, thus making cjpeg/djpeg considerably more useful. The latest
version is distributed by the NetPBM group, and is available from numerous
sites, notably ftp://wuarchive.wustl.edu/graphics/graphics/packages/NetPBM/.
Unfortunately PBMPLUS/NETPBM is not nearly as portable as the IJG software is;
you are likely to have difficulty making it work on any non-Unix machine.
A different free JPEG implementation, written by the PVRG group at Stanford,
is available from ftp://havefun.stanford.edu/pub/jpeg/. This program
is designed for research and experimentation rather than production use;
it is slower, harder to use, and less portable than the IJG code, but it
is easier to read and modify. Also, the PVRG code supports lossless JPEG,
which we do not. (On the other hand, it doesn't do progressive JPEG.)
FILE FORMAT WARS
================
Some JPEG programs produce files that are not compatible with our library.
The root of the problem is that the ISO JPEG committee failed to specify a
concrete file format. Some vendors "filled in the blanks" on their own,
creating proprietary formats that no one else could read. (For example, none
of the early commercial JPEG implementations for the Macintosh were able to
exchange compressed files.)
The file format we have adopted is called JFIF (see REFERENCES). This format
has been agreed to by a number of major commercial JPEG vendors, and it has
become the de facto standard. JFIF is a minimal or "low end" representation.
We recommend the use of TIFF/JPEG (TIFF revision 6.0 as modified by TIFF
Technical Note #2) for "high end" applications that need to record a lot of
additional data about an image. TIFF/JPEG is fairly new and not yet widely
supported, unfortunately.
The upcoming JPEG Part 3 standard defines a file format called SPIFF.
SPIFF is interoperable with JFIF, in the sense that most JFIF decoders should
be able to read the most common variant of SPIFF. SPIFF has some technical
advantages over JFIF, but its major claim to fame is simply that it is an
official standard rather than an informal one. At this point it is unclear
whether SPIFF will supersede JFIF or whether JFIF will remain the de-facto
standard. IJG intends to support SPIFF once the standard is frozen, but we
have not decided whether it should become our default output format or not.
(In any case, our decoder will remain capable of reading JFIF indefinitely.)
Various proprietary file formats incorporating JPEG compression also exist.
We have little or no sympathy for the existence of these formats. Indeed,
one of the original reasons for developing this free software was to help
force convergence on common, open format standards for JPEG files. Don't
use a proprietary file format!
TO DO
=====
The major thrust for v7 will probably be improvement of visual quality.
The current method for scaling the quantization tables is known not to be
very good at low Q values. We also intend to investigate block boundary
smoothing, "poor man's variable quantization", and other means of improving
quality-vs-file-size performance without sacrificing compatibility.
In future versions, we are considering supporting some of the upcoming JPEG
Part 3 extensions --- principally, variable quantization and the SPIFF file
format.
As always, speeding things up is of great interest.
Please send bug reports, offers of help, etc. to jpeg-info@uunet.uu.net.

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/* ansi2knr.c */
/* Convert ANSI C function definitions to K&R ("traditional C") syntax */
/*
ansi2knr is distributed in the hope that it will be useful, but WITHOUT ANY
WARRANTY. No author or distributor accepts responsibility to anyone for the
consequences of using it or for whether it serves any particular purpose or
works at all, unless he says so in writing. Refer to the GNU General Public
License (the "GPL") for full details.
Everyone is granted permission to copy, modify and redistribute ansi2knr,
but only under the conditions described in the GPL. A copy of this license
is supposed to have been given to you along with ansi2knr so you can know
your rights and responsibilities. It should be in a file named COPYLEFT.
[In the IJG distribution, the GPL appears below, not in a separate file.]
Among other things, the copyright notice and this notice must be preserved
on all copies.
We explicitly state here what we believe is already implied by the GPL: if
the ansi2knr program is distributed as a separate set of sources and a
separate executable file which are aggregated on a storage medium together
with another program, this in itself does not bring the other program under
the GPL, nor does the mere fact that such a program or the procedures for
constructing it invoke the ansi2knr executable bring any other part of the
program under the GPL.
*/
/*
---------- Here is the GNU GPL file COPYLEFT, referred to above ----------
----- These terms do NOT apply to the JPEG software itself; see README ------
GHOSTSCRIPT GENERAL PUBLIC LICENSE
(Clarified 11 Feb 1988)
Copyright (C) 1988 Richard M. Stallman
Everyone is permitted to copy and distribute verbatim copies of this
license, but changing it is not allowed. You can also use this wording
to make the terms for other programs.
The license agreements of most software companies keep you at the
mercy of those companies. By contrast, our general public license is
intended to give everyone the right to share Ghostscript. To make sure
that you get the rights we want you to have, we need to make
restrictions that forbid anyone to deny you these rights or to ask you
to surrender the rights. Hence this license agreement.
Specifically, we want to make sure that you have the right to give
away copies of Ghostscript, that you receive source code or else can get
it if you want it, that you can change Ghostscript or use pieces of it
in new free programs, and that you know you can do these things.
To make sure that everyone has such rights, we have to forbid you to
deprive anyone else of these rights. For example, if you distribute
copies of Ghostscript, you must give the recipients all the rights that
you have. You must make sure that they, too, receive or can get the
source code. And you must tell them their rights.
Also, for our own protection, we must make certain that everyone finds
out that there is no warranty for Ghostscript. If Ghostscript is
modified by someone else and passed on, we want its recipients to know
that what they have is not what we distributed, so that any problems
introduced by others will not reflect on our reputation.
Therefore we (Richard M. Stallman and the Free Software Foundation,
Inc.) make the following terms which say what you must do to be allowed
to distribute or change Ghostscript.
COPYING POLICIES
1. You may copy and distribute verbatim copies of Ghostscript source
code as you receive it, in any medium, provided that you conspicuously
and appropriately publish on each copy a valid copyright and license
notice "Copyright (C) 1989 Aladdin Enterprises. All rights reserved.
Distributed by Free Software Foundation, Inc." (or with whatever year is
appropriate); keep intact the notices on all files that refer to this
License Agreement and to the absence of any warranty; and give any other
recipients of the Ghostscript program a copy of this License Agreement
along with the program. You may charge a distribution fee for the
physical act of transferring a copy.
2. You may modify your copy or copies of Ghostscript or any portion of
it, and copy and distribute such modifications under the terms of
Paragraph 1 above, provided that you also do the following:
a) cause the modified files to carry prominent notices stating
that you changed the files and the date of any change; and
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that in whole or in part contains or is a derivative of Ghostscript
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Agreement (except that you may choose to grant more extensive
warranty protection to some or all third parties, at your option).
c) You may charge a distribution fee for the physical act of
transferring a copy, and you may at your option offer warranty
protection in exchange for a fee.
Mere aggregation of another unrelated program with this program (or its
derivative) on a volume of a storage or distribution medium does not bring
the other program under the scope of these terms.
3. You may copy and distribute Ghostscript (or a portion or derivative
of it, under Paragraph 2) in object code or executable form under the
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b) accompany it with a written offer, valid for at least three
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For an executable file, complete source code means all the source code for
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4. You may not copy, sublicense, distribute or transfer Ghostscript
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5. If you wish to incorporate parts of Ghostscript into other free
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Your comments and suggestions about our licensing policies and our
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NO WARRANTY
BECAUSE GHOSTSCRIPT IS LICENSED FREE OF CHARGE, WE PROVIDE ABSOLUTELY
NO WARRANTY, TO THE EXTENT PERMITTED BY APPLICABLE STATE LAW. EXCEPT
WHEN OTHERWISE STATED IN WRITING, FREE SOFTWARE FOUNDATION, INC, RICHARD
M. STALLMAN, ALADDIN ENTERPRISES, L. PETER DEUTSCH, AND/OR OTHER PARTIES
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STALLMAN, THE FREE SOFTWARE FOUNDATION, INC., L. PETER DEUTSCH, ALADDIN
ENTERPRISES, AND/OR ANY OTHER PARTY WHO MAY MODIFY AND REDISTRIBUTE
GHOSTSCRIPT AS PERMITTED ABOVE, BE LIABLE TO YOU FOR DAMAGES, INCLUDING
ANY LOST PROFITS, LOST MONIES, OR OTHER SPECIAL, INCIDENTAL OR
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(INCLUDING BUT NOT LIMITED TO LOSS OF DATA OR DATA BEING RENDERED
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PROGRAM TO OPERATE WITH ANY OTHER PROGRAMS) GHOSTSCRIPT, EVEN IF YOU
HAVE BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES, OR FOR ANY CLAIM
BY ANY OTHER PARTY.
-------------------- End of file COPYLEFT ------------------------------
*/
/*
* Usage:
ansi2knr input_file [output_file]
* If no output_file is supplied, output goes to stdout.
* There are no error messages.
*
* ansi2knr recognizes function definitions by seeing a non-keyword
* identifier at the left margin, followed by a left parenthesis,
* with a right parenthesis as the last character on the line,
* and with a left brace as the first token on the following line
* (ignoring possible intervening comments).
* It will recognize a multi-line header provided that no intervening
* line ends with a left or right brace or a semicolon.
* These algorithms ignore whitespace and comments, except that
* the function name must be the first thing on the line.
* The following constructs will confuse it:
* - Any other construct that starts at the left margin and
* follows the above syntax (such as a macro or function call).
* - Some macros that tinker with the syntax of the function header.
*/
/*
* The original and principal author of ansi2knr is L. Peter Deutsch
* <ghost@aladdin.com>. Other authors are noted in the change history
* that follows (in reverse chronological order):
lpd 96-01-21 added code to cope with not HAVE_CONFIG_H and with
compilers that don't understand void, as suggested by
Tom Lane
lpd 96-01-15 changed to require that the first non-comment token
on the line following a function header be a left brace,
to reduce sensitivity to macros, as suggested by Tom Lane
<tgl@sss.pgh.pa.us>
lpd 95-06-22 removed #ifndefs whose sole purpose was to define
undefined preprocessor symbols as 0; changed all #ifdefs
for configuration symbols to #ifs
lpd 95-04-05 changed copyright notice to make it clear that
including ansi2knr in a program does not bring the entire
program under the GPL
lpd 94-12-18 added conditionals for systems where ctype macros
don't handle 8-bit characters properly, suggested by
Francois Pinard <pinard@iro.umontreal.ca>;
removed --varargs switch (this is now the default)
lpd 94-10-10 removed CONFIG_BROKETS conditional
lpd 94-07-16 added some conditionals to help GNU `configure',
suggested by Francois Pinard <pinard@iro.umontreal.ca>;
properly erase prototype args in function parameters,
contributed by Jim Avera <jima@netcom.com>;
correct error in writeblanks (it shouldn't erase EOLs)
lpd 89-xx-xx original version
*/
/* Most of the conditionals here are to make ansi2knr work with */
/* or without the GNU configure machinery. */
#if HAVE_CONFIG_H
# include <config.h>
#endif
#include <stdio.h>
#include <ctype.h>
#if HAVE_CONFIG_H
/*
For properly autoconfiguring ansi2knr, use AC_CONFIG_HEADER(config.h).
This will define HAVE_CONFIG_H and so, activate the following lines.
*/
# if STDC_HEADERS || HAVE_STRING_H
# include <string.h>
# else
# include <strings.h>
# endif
#else /* not HAVE_CONFIG_H */
/* Otherwise do it the hard way */
# ifdef BSD
# include <strings.h>
# else
# ifdef VMS
extern int strlen(), strncmp();
# else
# include <string.h>
# endif
# endif
#endif /* not HAVE_CONFIG_H */
#if STDC_HEADERS
# include <stdlib.h>
#else
/*
malloc and free should be declared in stdlib.h,
but if you've got a K&R compiler, they probably aren't.
*/
# ifdef MSDOS
# include <malloc.h>
# else
# ifdef VMS
extern char *malloc();
extern void free();
# else
extern char *malloc();
extern int free();
# endif
# endif
#endif
/*
* The ctype macros don't always handle 8-bit characters correctly.
* Compensate for this here.
*/
#ifdef isascii
# undef HAVE_ISASCII /* just in case */
# define HAVE_ISASCII 1
#else
#endif
#if STDC_HEADERS || !HAVE_ISASCII
# define is_ascii(c) 1
#else
# define is_ascii(c) isascii(c)
#endif
#define is_space(c) (is_ascii(c) && isspace(c))
#define is_alpha(c) (is_ascii(c) && isalpha(c))
#define is_alnum(c) (is_ascii(c) && isalnum(c))
/* Scanning macros */
#define isidchar(ch) (is_alnum(ch) || (ch) == '_')
#define isidfirstchar(ch) (is_alpha(ch) || (ch) == '_')
/* Forward references */
char *skipspace();
int writeblanks();
int test1();
int convert1();
/* The main program */
int
main(argc, argv)
int argc;
char *argv[];
{ FILE *in, *out;
#define bufsize 5000 /* arbitrary size */
char *buf;
char *line;
char *more;
/*
* In previous versions, ansi2knr recognized a --varargs switch.
* If this switch was supplied, ansi2knr would attempt to convert
* a ... argument to va_alist and va_dcl; if this switch was not
* supplied, ansi2knr would simply drop any such arguments.
* Now, ansi2knr always does this conversion, and we only
* check for this switch for backward compatibility.
*/
int convert_varargs = 1;
if ( argc > 1 && argv[1][0] == '-' )
{ if ( !strcmp(argv[1], "--varargs") )
{ convert_varargs = 1;
argc--;
argv++;
}
else
{ fprintf(stderr, "Unrecognized switch: %s\n", argv[1]);
exit(1);
}
}
switch ( argc )
{
default:
printf("Usage: ansi2knr input_file [output_file]\n");
exit(0);
case 2:
out = stdout;
break;
case 3:
out = fopen(argv[2], "w");
if ( out == NULL )
{ fprintf(stderr, "Cannot open output file %s\n", argv[2]);
exit(1);
}
}
in = fopen(argv[1], "r");
if ( in == NULL )
{ fprintf(stderr, "Cannot open input file %s\n", argv[1]);
exit(1);
}
fprintf(out, "#line 1 \"%s\"\n", argv[1]);
buf = malloc(bufsize);
line = buf;
while ( fgets(line, (unsigned)(buf + bufsize - line), in) != NULL )
{
test: line += strlen(line);
switch ( test1(buf) )
{
case 2: /* a function header */
convert1(buf, out, 1, convert_varargs);
break;
case 1: /* a function */
/* Check for a { at the start of the next line. */
more = ++line;
f: if ( line >= buf + (bufsize - 1) ) /* overflow check */
goto wl;
if ( fgets(line, (unsigned)(buf + bufsize - line), in) == NULL )
goto wl;
switch ( *skipspace(more, 1) )
{
case '{':
/* Definitely a function header. */
convert1(buf, out, 0, convert_varargs);
fputs(more, out);
break;
case 0:
/* The next line was blank or a comment: */
/* keep scanning for a non-comment. */
line += strlen(line);
goto f;
default:
/* buf isn't a function header, but */
/* more might be. */
fputs(buf, out);
strcpy(buf, more);
line = buf;
goto test;
}
break;
case -1: /* maybe the start of a function */
if ( line != buf + (bufsize - 1) ) /* overflow check */
continue;
/* falls through */
default: /* not a function */
wl: fputs(buf, out);
break;
}
line = buf;
}
if ( line != buf )
fputs(buf, out);
free(buf);
fclose(out);
fclose(in);
return 0;
}
/* Skip over space and comments, in either direction. */
char *
skipspace(p, dir)
register char *p;
register int dir; /* 1 for forward, -1 for backward */
{ for ( ; ; )
{ while ( is_space(*p) )
p += dir;
if ( !(*p == '/' && p[dir] == '*') )
break;
p += dir; p += dir;
while ( !(*p == '*' && p[dir] == '/') )
{ if ( *p == 0 )
return p; /* multi-line comment?? */
p += dir;
}
p += dir; p += dir;
}
return p;
}
/*
* Write blanks over part of a string.
* Don't overwrite end-of-line characters.
*/
int
writeblanks(start, end)
char *start;
char *end;
{ char *p;
for ( p = start; p < end; p++ )
if ( *p != '\r' && *p != '\n' )
*p = ' ';
return 0;
}
/*
* Test whether the string in buf is a function definition.
* The string may contain and/or end with a newline.
* Return as follows:
* 0 - definitely not a function definition;
* 1 - definitely a function definition;
* 2 - definitely a function prototype (NOT USED);
* -1 - may be the beginning of a function definition,
* append another line and look again.
* The reason we don't attempt to convert function prototypes is that
* Ghostscript's declaration-generating macros look too much like
* prototypes, and confuse the algorithms.
*/
int
test1(buf)
char *buf;
{ register char *p = buf;
char *bend;
char *endfn;
int contin;
if ( !isidfirstchar(*p) )
return 0; /* no name at left margin */
bend = skipspace(buf + strlen(buf) - 1, -1);
switch ( *bend )
{
case ';': contin = 0 /*2*/; break;
case ')': contin = 1; break;
case '{': return 0; /* not a function */
case '}': return 0; /* not a function */
default: contin = -1;
}
while ( isidchar(*p) )
p++;
endfn = p;
p = skipspace(p, 1);
if ( *p++ != '(' )
return 0; /* not a function */
p = skipspace(p, 1);
if ( *p == ')' )
return 0; /* no parameters */
/* Check that the apparent function name isn't a keyword. */
/* We only need to check for keywords that could be followed */
/* by a left parenthesis (which, unfortunately, is most of them). */
{ static char *words[] =
{ "asm", "auto", "case", "char", "const", "double",
"extern", "float", "for", "if", "int", "long",
"register", "return", "short", "signed", "sizeof",
"static", "switch", "typedef", "unsigned",
"void", "volatile", "while", 0
};
char **key = words;
char *kp;
int len = endfn - buf;
while ( (kp = *key) != 0 )
{ if ( strlen(kp) == len && !strncmp(kp, buf, len) )
return 0; /* name is a keyword */
key++;
}
}
return contin;
}
/* Convert a recognized function definition or header to K&R syntax. */
int
convert1(buf, out, header, convert_varargs)
char *buf;
FILE *out;
int header; /* Boolean */
int convert_varargs; /* Boolean */
{ char *endfn;
register char *p;
char **breaks;
unsigned num_breaks = 2; /* for testing */
char **btop;
char **bp;
char **ap;
char *vararg = 0;
/* Pre-ANSI implementations don't agree on whether strchr */
/* is called strchr or index, so we open-code it here. */
for ( endfn = buf; *(endfn++) != '('; )
;
top: p = endfn;
breaks = (char **)malloc(sizeof(char *) * num_breaks * 2);
if ( breaks == 0 )
{ /* Couldn't allocate break table, give up */
fprintf(stderr, "Unable to allocate break table!\n");
fputs(buf, out);
return -1;
}
btop = breaks + num_breaks * 2 - 2;
bp = breaks;
/* Parse the argument list */
do
{ int level = 0;
char *lp = NULL;
char *rp;
char *end = NULL;
if ( bp >= btop )
{ /* Filled up break table. */
/* Allocate a bigger one and start over. */
free((char *)breaks);
num_breaks <<= 1;
goto top;
}
*bp++ = p;
/* Find the end of the argument */
for ( ; end == NULL; p++ )
{ switch(*p)
{
case ',':
if ( !level ) end = p;
break;
case '(':
if ( !level ) lp = p;
level++;
break;
case ')':
if ( --level < 0 ) end = p;
else rp = p;
break;
case '/':
p = skipspace(p, 1) - 1;
break;
default:
;
}
}
/* Erase any embedded prototype parameters. */
if ( lp )
writeblanks(lp + 1, rp);
p--; /* back up over terminator */
/* Find the name being declared. */
/* This is complicated because of procedure and */
/* array modifiers. */
for ( ; ; )
{ p = skipspace(p - 1, -1);
switch ( *p )
{
case ']': /* skip array dimension(s) */
case ')': /* skip procedure args OR name */
{ int level = 1;
while ( level )
switch ( *--p )
{
case ']': case ')': level++; break;
case '[': case '(': level--; break;
case '/': p = skipspace(p, -1) + 1; break;
default: ;
}
}
if ( *p == '(' && *skipspace(p + 1, 1) == '*' )
{ /* We found the name being declared */
while ( !isidfirstchar(*p) )
p = skipspace(p, 1) + 1;
goto found;
}
break;
default:
goto found;
}
}
found: if ( *p == '.' && p[-1] == '.' && p[-2] == '.' )
{ if ( convert_varargs )
{ *bp++ = "va_alist";
vararg = p-2;
}
else
{ p++;
if ( bp == breaks + 1 ) /* sole argument */
writeblanks(breaks[0], p);
else
writeblanks(bp[-1] - 1, p);
bp--;
}
}
else
{ while ( isidchar(*p) ) p--;
*bp++ = p+1;
}
p = end;
}
while ( *p++ == ',' );
*bp = p;
/* Make a special check for 'void' arglist */
if ( bp == breaks+2 )
{ p = skipspace(breaks[0], 1);
if ( !strncmp(p, "void", 4) )
{ p = skipspace(p+4, 1);
if ( p == breaks[2] - 1 )
{ bp = breaks; /* yup, pretend arglist is empty */
writeblanks(breaks[0], p + 1);
}
}
}
/* Put out the function name and left parenthesis. */
p = buf;
while ( p != endfn ) putc(*p, out), p++;
/* Put out the declaration. */
if ( header )
{ fputs(");", out);
for ( p = breaks[0]; *p; p++ )
if ( *p == '\r' || *p == '\n' )
putc(*p, out);
}
else
{ for ( ap = breaks+1; ap < bp; ap += 2 )
{ p = *ap;
while ( isidchar(*p) )
putc(*p, out), p++;
if ( ap < bp - 1 )
fputs(", ", out);
}
fputs(") ", out);
/* Put out the argument declarations */
for ( ap = breaks+2; ap <= bp; ap += 2 )
(*ap)[-1] = ';';
if ( vararg != 0 )
{ *vararg = 0;
fputs(breaks[0], out); /* any prior args */
fputs("va_dcl", out); /* the final arg */
fputs(bp[0], out);
}
else
fputs(breaks[0], out);
}
free((char *)breaks);
return 0;
}

217
Source/3rd Party/wx/src/jpeg/change.log Normal file
View File

@ -0,0 +1,217 @@
CHANGE LOG for Independent JPEG Group's JPEG software
Version 6b 27-Mar-1998
-----------------------
jpegtran has new features for lossless image transformations (rotation
and flipping) as well as "lossless" reduction to grayscale.
jpegtran now copies comments by default; it has a -copy switch to enable
copying all APPn blocks as well, or to suppress comments. (Formerly it
always suppressed comments and APPn blocks.) jpegtran now also preserves
JFIF version and resolution information.
New decompressor library feature: COM and APPn markers found in the input
file can be saved in memory for later use by the application. (Before,
you had to code this up yourself with a custom marker processor.)
There is an unused field "void * client_data" now in compress and decompress
parameter structs; this may be useful in some applications.
JFIF version number information is now saved by the decoder and accepted by
the encoder. jpegtran uses this to copy the source file's version number,
to ensure "jpegtran -copy all" won't create bogus files that contain JFXX
extensions but claim to be version 1.01. Applications that generate their
own JFXX extension markers also (finally) have a supported way to cause the
encoder to emit JFIF version number 1.02.
djpeg's trace mode reports JFIF 1.02 thumbnail images as such, rather
than as unknown APP0 markers.
In -verbose mode, djpeg and rdjpgcom will try to print the contents of
APP12 markers as text. Some digital cameras store useful text information
in APP12 markers.
Handling of truncated data streams is more robust: blocks beyond the one in
which the error occurs will be output as uniform gray, or left unchanged
if decoding a progressive JPEG. The appearance no longer depends on the
Huffman tables being used.
Huffman tables are checked for validity much more carefully than before.
To avoid the Unisys LZW patent, djpeg's GIF output capability has been
changed to produce "uncompressed GIFs", and cjpeg's GIF input capability
has been removed altogether. We're not happy about it either, but there
seems to be no good alternative.
The configure script now supports building libjpeg as a shared library
on many flavors of Unix (all the ones that GNU libtool knows how to
build shared libraries for). Use "./configure --enable-shared" to
try this out.
New jconfig file and makefiles for Microsoft Visual C++ and Developer Studio.
Also, a jconfig file and a build script for Metrowerks CodeWarrior
on Apple Macintosh. makefile.dj has been updated for DJGPP v2, and there
are miscellaneous other minor improvements in the makefiles.
jmemmac.c now knows how to create temporary files following Mac System 7
conventions.
djpeg's -map switch is now able to read raw-format PPM files reliably.
cjpeg -progressive -restart no longer generates any unnecessary DRI markers.
Multiple calls to jpeg_simple_progression for a single JPEG object
no longer leak memory.
Version 6a 7-Feb-96
--------------------
Library initialization sequence modified to detect version mismatches
and struct field packing mismatches between library and calling application.
This change requires applications to be recompiled, but does not require
any application source code change.
All routine declarations changed to the style "GLOBAL(type) name ...",
that is, GLOBAL, LOCAL, METHODDEF, EXTERN are now macros taking the
routine's return type as an argument. This makes it possible to add
Microsoft-style linkage keywords to all the routines by changing just
these macros. Note that any application code that was using these macros
will have to be changed.
DCT coefficient quantization tables are now stored in normal array order
rather than zigzag order. Application code that calls jpeg_add_quant_table,
or otherwise manipulates quantization tables directly, will need to be
changed. If you need to make such code work with either older or newer
versions of the library, a test like "#if JPEG_LIB_VERSION >= 61" is
recommended.
djpeg's trace capability now dumps DQT tables in natural order, not zigzag
order. This allows the trace output to be made into a "-qtables" file
more easily.
New system-dependent memory manager module for use on Apple Macintosh.
Fix bug in cjpeg's -smooth option: last one or two scanlines would be
duplicates of the prior line unless the image height mod 16 was 1 or 2.
Repair minor problems in VMS, BCC, MC6 makefiles.
New configure script based on latest GNU Autoconf.
Correct the list of include files needed by MetroWerks C for ccommand().
Numerous small documentation updates.
Version 6 2-Aug-95
-------------------
Progressive JPEG support: library can read and write full progressive JPEG
files. A "buffered image" mode supports incremental decoding for on-the-fly
display of progressive images. Simply recompiling an existing IJG-v5-based
decoder with v6 should allow it to read progressive files, though of course
without any special progressive display.
New "jpegtran" application performs lossless transcoding between different
JPEG formats; primarily, it can be used to convert baseline to progressive
JPEG and vice versa. In support of jpegtran, the library now allows lossless
reading and writing of JPEG files as DCT coefficient arrays. This ability
may be of use in other applications.
Notes for programmers:
* We changed jpeg_start_decompress() to be able to suspend; this makes all
decoding modes available to suspending-input applications. However,
existing applications that use suspending input will need to be changed
to check the return value from jpeg_start_decompress(). You don't need to
do anything if you don't use a suspending data source.
* We changed the interface to the virtual array routines: access_virt_array
routines now take a count of the number of rows to access this time. The
last parameter to request_virt_array routines is now interpreted as the
maximum number of rows that may be accessed at once, but not necessarily
the height of every access.
Version 5b 15-Mar-95
---------------------
Correct bugs with grayscale images having v_samp_factor > 1.
jpeg_write_raw_data() now supports output suspension.
Correct bugs in "configure" script for case of compiling in
a directory other than the one containing the source files.
Repair bug in jquant1.c: sometimes didn't use as many colors as it could.
Borland C makefile and jconfig file work under either MS-DOS or OS/2.
Miscellaneous improvements to documentation.
Version 5a 7-Dec-94
--------------------
Changed color conversion roundoff behavior so that grayscale values are
represented exactly. (This causes test image files to change.)
Make ordered dither use 16x16 instead of 4x4 pattern for a small quality
improvement.
New configure script based on latest GNU Autoconf.
Fix configure script to handle CFLAGS correctly.
Rename *.auto files to *.cfg, so that configure script still works if
file names have been truncated for DOS.
Fix bug in rdbmp.c: didn't allow for extra data between header and image.
Modify rdppm.c/wrppm.c to handle 2-byte raw PPM/PGM formats for 12-bit data.
Fix several bugs in rdrle.c.
NEED_SHORT_EXTERNAL_NAMES option was broken.
Revise jerror.h/jerror.c for more flexibility in message table.
Repair oversight in jmemname.c NO_MKTEMP case: file could be there
but unreadable.
Version 5 24-Sep-94
--------------------
Version 5 represents a nearly complete redesign and rewrite of the IJG
software. Major user-visible changes include:
* Automatic configuration simplifies installation for most Unix systems.
* A range of speed vs. image quality tradeoffs are supported.
This includes resizing of an image during decompression: scaling down
by a factor of 1/2, 1/4, or 1/8 is handled very efficiently.
* New programs rdjpgcom and wrjpgcom allow insertion and extraction
of text comments in a JPEG file.
The application programmer's interface to the library has changed completely.
Notable improvements include:
* We have eliminated the use of callback routines for handling the
uncompressed image data. The application now sees the library as a
set of routines that it calls to read or write image data on a
scanline-by-scanline basis.
* The application image data is represented in a conventional interleaved-
pixel format, rather than as a separate array for each color channel.
This can save a copying step in many programs.
* The handling of compressed data has been cleaned up: the application can
supply routines to source or sink the compressed data. It is possible to
suspend processing on source/sink buffer overrun, although this is not
supported in all operating modes.
* All static state has been eliminated from the library, so that multiple
instances of compression or decompression can be active concurrently.
* JPEG abbreviated datastream formats are supported, ie, quantization and
Huffman tables can be stored separately from the image data.
* And not only that, but the documentation of the library has improved
considerably!
The last widely used release before the version 5 rewrite was version 4A of
18-Feb-93. Change logs before that point have been discarded, since they
are not of much interest after the rewrite.

42
Source/3rd Party/wx/src/jpeg/jconfig.h
View File

@ -1,4 +1,8 @@
#if defined(_WIN32) || defined(__OS2__)
/* This test added by JACS as a quick fix. What should we do
* to make it work with configure?
*/
#if defined(_MSC_VER) || defined(__BORLANDC__) || defined (__DMC__)
#include "jconfig.vc"
#else
@ -6,9 +10,39 @@
/* jconfig.cfg --- source file edited by configure script */
/* see jconfig.doc for explanations */
/* If using MetroWerks on Mac define __WXMAC__ if it isn't already
FIXME: Is this necessary any longer? */
#ifdef __MWERKS__
#if (__MWERKS__ < 0x0900) || macintosh || defined ( __MACH__ )
# ifndef __WXMAC__
# define __WXMAC__
# endif
#endif
#endif
/* use wxWidgets' configure */
#include "wx/setup.h"
/* If using Metrowerks and not using configure-generated setup */
#if defined(__MWERKS__) && !defined(__WX_SETUP_H__)
#if (__MWERKS__ < 0x0900) || macintosh || defined ( __MACH__ )
# define USE_MAC_MEMMGR
# ifdef __MACH__
# include <ansi_prefix.mach.h>
# include <msl_c_version.h>
# include <stdint.h>
# undef WCHAR_MAX
# include <machine/ansi.h>
# endif
/* automatically includes MacHeaders */
#elif (__MWERKS__ >= 0x0900) && __INTEL__
#define __WXMSW__
#endif
#endif
#define HAVE_PROTOTYPES
#define HAVE_UNSIGNED_CHAR
#define HAVE_UNSIGNED_SHORT
@ -25,14 +59,8 @@
#undef CHAR_IS_UNSIGNED
#endif
#ifndef HAVE_STDDEF_H
#define HAVE_STDDEF_H
#endif
#ifndef HAVE_STDLIB_H
#define HAVE_STDLIB_H
#endif
#undef NEED_BSD_STRINGS
#undef NEED_SYS_TYPES_H
#undef NEED_FAR_POINTERS

167
Source/3rd Party/wx/src/jpeg/jmemansi.c Normal file
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@ -0,0 +1,167 @@
/*
* jmemansi.c
*
* Copyright (C) 1992-1996, Thomas G. Lane.
* This file is part of the Independent JPEG Group's software.
* For conditions of distribution and use, see the accompanying README file.
*
* This file provides a simple generic implementation of the system-
* dependent portion of the JPEG memory manager. This implementation
* assumes that you have the ANSI-standard library routine tmpfile().
* Also, the problem of determining the amount of memory available
* is shoved onto the user.
*/
#define JPEG_INTERNALS
#include "jinclude.h"
#include "jpeglib.h"
#include "jmemsys.h" /* import the system-dependent declarations */
#ifndef HAVE_STDLIB_H /* <stdlib.h> should declare malloc(),free() */
extern void * malloc JPP((size_t size));
extern void free JPP((void *ptr));
#endif
#ifndef SEEK_SET /* pre-ANSI systems may not define this; */
#define SEEK_SET 0 /* if not, assume 0 is correct */
#endif
/*
* Memory allocation and freeing are controlled by the regular library
* routines malloc() and free().
*/
GLOBAL(void *)
jpeg_get_small (j_common_ptr cinfo, size_t sizeofobject)
{
return (void *) malloc(sizeofobject);
}
GLOBAL(void)
jpeg_free_small (j_common_ptr cinfo, void * object, size_t sizeofobject)
{
free(object);
}
/*
* "Large" objects are treated the same as "small" ones.
* NB: although we include FAR keywords in the routine declarations,
* this file won't actually work in 80x86 small/medium model; at least,
* you probably won't be able to process useful-size images in only 64KB.
*/
GLOBAL(void FAR *)
jpeg_get_large (j_common_ptr cinfo, size_t sizeofobject)
{
return (void FAR *) malloc(sizeofobject);
}
GLOBAL(void)
jpeg_free_large (j_common_ptr cinfo, void FAR * object, size_t sizeofobject)
{
free(object);
}
/*
* This routine computes the total memory space available for allocation.
* It's impossible to do this in a portable way; our current solution is
* to make the user tell us (with a default value set at compile time).
* If you can actually get the available space, it's a good idea to subtract
* a slop factor of 5% or so.
*/
#ifndef DEFAULT_MAX_MEM /* so can override from makefile */
#define DEFAULT_MAX_MEM 1000000L /* default: one megabyte */
#endif
GLOBAL(long)
jpeg_mem_available (j_common_ptr cinfo, long min_bytes_needed,
long max_bytes_needed, long already_allocated)
{
return cinfo->mem->max_memory_to_use - already_allocated;
}
/*
* Backing store (temporary file) management.
* Backing store objects are only used when the value returned by
* jpeg_mem_available is less than the total space needed. You can dispense
* with these routines if you have plenty of virtual memory; see jmemnobs.c.
*/
METHODDEF(void)
read_backing_store (j_common_ptr cinfo, backing_store_ptr info,
void FAR * buffer_address,
long file_offset, long byte_count)
{
if (fseek(info->temp_file, file_offset, SEEK_SET))
ERREXIT(cinfo, JERR_TFILE_SEEK);
if (JFREAD(info->temp_file, buffer_address, byte_count)
!= (size_t) byte_count)
ERREXIT(cinfo, JERR_TFILE_READ);
}
METHODDEF(void)
write_backing_store (j_common_ptr cinfo, backing_store_ptr info,
void FAR * buffer_address,
long file_offset, long byte_count)
{
if (fseek(info->temp_file, file_offset, SEEK_SET))
ERREXIT(cinfo, JERR_TFILE_SEEK);
if (JFWRITE(info->temp_file, buffer_address, byte_count)
!= (size_t) byte_count)
ERREXIT(cinfo, JERR_TFILE_WRITE);
}
METHODDEF(void)
close_backing_store (j_common_ptr cinfo, backing_store_ptr info)
{
fclose(info->temp_file);
/* Since this implementation uses tmpfile() to create the file,
* no explicit file deletion is needed.
*/
}
/*
* Initial opening of a backing-store object.
*
* This version uses tmpfile(), which constructs a suitable file name
* behind the scenes. We don't have to use info->temp_name[] at all;
* indeed, we can't even find out the actual name of the temp file.
*/
GLOBAL(void)
jpeg_open_backing_store (j_common_ptr cinfo, backing_store_ptr info,
long total_bytes_needed)
{
if ((info->temp_file = tmpfile()) == NULL)
ERREXITS(cinfo, JERR_TFILE_CREATE, "");
info->read_backing_store = read_backing_store;
info->write_backing_store = write_backing_store;
info->close_backing_store = close_backing_store;
}
/*
* These routines take care of any system-dependent initialization and
* cleanup required.
*/
GLOBAL(long)
jpeg_mem_init (j_common_ptr cinfo)
{
return DEFAULT_MAX_MEM; /* default for max_memory_to_use */
}
GLOBAL(void)
jpeg_mem_term (j_common_ptr cinfo)
{
/* no work */
}

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/*
* jmemdos.c
*
* Copyright (C) 1992-1997, Thomas G. Lane.
* This file is part of the Independent JPEG Group's software.
* For conditions of distribution and use, see the accompanying README file.
*
* This file provides an MS-DOS-compatible implementation of the system-
* dependent portion of the JPEG memory manager. Temporary data can be
* stored in extended or expanded memory as well as in regular DOS files.
*
* If you use this file, you must be sure that NEED_FAR_POINTERS is defined
* if you compile in a small-data memory model; it should NOT be defined if
* you use a large-data memory model. This file is not recommended if you
* are using a flat-memory-space 386 environment such as DJGCC or Watcom C.
* Also, this code will NOT work if struct fields are aligned on greater than
* 2-byte boundaries.
*
* Based on code contributed by Ge' Weijers.
*/
/*
* If you have both extended and expanded memory, you may want to change the
* order in which they are tried in jopen_backing_store. On a 286 machine
* expanded memory is usually faster, since extended memory access involves
* an expensive protected-mode-and-back switch. On 386 and better, extended
* memory is usually faster. As distributed, the code tries extended memory
* first (what? not everyone has a 386? :-).
*
* You can disable use of extended/expanded memory entirely by altering these
* definitions or overriding them from the Makefile (eg, -DEMS_SUPPORTED=0).
*/
#ifndef XMS_SUPPORTED
#define XMS_SUPPORTED 1
#endif
#ifndef EMS_SUPPORTED
#define EMS_SUPPORTED 1
#endif
#define JPEG_INTERNALS
#include "jinclude.h"
#include "jpeglib.h"
#include "jmemsys.h" /* import the system-dependent declarations */
#ifndef HAVE_STDLIB_H /* <stdlib.h> should declare these */
extern void * malloc JPP((size_t size));
extern void free JPP((void *ptr));
extern char * getenv JPP((const char * name));
#endif
#ifdef NEED_FAR_POINTERS
#ifdef __TURBOC__
/* These definitions work for Borland C (Turbo C) */
#include <alloc.h> /* need farmalloc(), farfree() */
#define far_malloc(x) farmalloc(x)
#define far_free(x) farfree(x)
#else
/* These definitions work for Microsoft C and compatible compilers */
#include <malloc.h> /* need _fmalloc(), _ffree() */
#define far_malloc(x) _fmalloc(x)
#define far_free(x) _ffree(x)
#endif
#else /* not NEED_FAR_POINTERS */
#define far_malloc(x) malloc(x)
#define far_free(x) free(x)
#endif /* NEED_FAR_POINTERS */
#ifdef DONT_USE_B_MODE /* define mode parameters for fopen() */
#define READ_BINARY "r"
#else
#define READ_BINARY "rb"
#endif
#ifndef USE_MSDOS_MEMMGR /* make sure user got configuration right */
You forgot to define USE_MSDOS_MEMMGR in jconfig.h. /* deliberate syntax error */
#endif
#if MAX_ALLOC_CHUNK >= 65535L /* make sure jconfig.h got this right */
MAX_ALLOC_CHUNK should be less than 64K. /* deliberate syntax error */
#endif
/*
* Declarations for assembly-language support routines (see jmemdosa.asm).
*
* The functions are declared "far" as are all their pointer arguments;
* this ensures the assembly source code will work regardless of the
* compiler memory model. We assume "short" is 16 bits, "long" is 32.
*/
typedef void far * XMSDRIVER; /* actually a pointer to code */
typedef struct { /* registers for calling XMS driver */
unsigned short ax, dx, bx;
void far * ds_si;
} XMScontext;
typedef struct { /* registers for calling EMS driver */
unsigned short ax, dx, bx;
void far * ds_si;
} EMScontext;
extern short far jdos_open JPP((short far * handle, char far * filename));
extern short far jdos_close JPP((short handle));
extern short far jdos_seek JPP((short handle, long offset));
extern short far jdos_read JPP((short handle, void far * buffer,
unsigned short count));
extern short far jdos_write JPP((short handle, void far * buffer,
unsigned short count));
extern void far jxms_getdriver JPP((XMSDRIVER far *));
extern void far jxms_calldriver JPP((XMSDRIVER, XMScontext far *));
extern short far jems_available JPP((void));
extern void far jems_calldriver JPP((EMScontext far *));
/*
* Selection of a file name for a temporary file.
* This is highly system-dependent, and you may want to customize it.
*/
static int next_file_num; /* to distinguish among several temp files */
LOCAL(void)
select_file_name (char * fname)
{
const char * env;
char * ptr;
FILE * tfile;
/* Keep generating file names till we find one that's not in use */
for (;;) {
/* Get temp directory name from environment TMP or TEMP variable;
* if none, use "."
*/
if ((env = (const char *) getenv("TMP")) == NULL)
if ((env = (const char *) getenv("TEMP")) == NULL)
env = ".";
if (*env == '\0') /* null string means "." */
env = ".";
ptr = fname; /* copy name to fname */
while (*env != '\0')
*ptr++ = *env++;
if (ptr[-1] != '\\' && ptr[-1] != '/')
*ptr++ = '\\'; /* append backslash if not in env variable */
/* Append a suitable file name */
next_file_num++; /* advance counter */
sprintf(ptr, "JPG%03d.TMP", next_file_num);
/* Probe to see if file name is already in use */
if ((tfile = fopen(fname, READ_BINARY)) == NULL)
break;
fclose(tfile); /* oops, it's there; close tfile & try again */
}
}
/*
* Near-memory allocation and freeing are controlled by the regular library
* routines malloc() and free().
*/
GLOBAL(void *)
jpeg_get_small (j_common_ptr cinfo, size_t sizeofobject)
{
return (void *) malloc(sizeofobject);
}
GLOBAL(void)
jpeg_free_small (j_common_ptr cinfo, void * object, size_t sizeofobject)
{
free(object);
}
/*
* "Large" objects are allocated in far memory, if possible
*/
GLOBAL(void FAR *)
jpeg_get_large (j_common_ptr cinfo, size_t sizeofobject)
{
return (void FAR *) far_malloc(sizeofobject);
}
GLOBAL(void)
jpeg_free_large (j_common_ptr cinfo, void FAR * object, size_t sizeofobject)
{
far_free(object);
}
/*
* This routine computes the total memory space available for allocation.
* It's impossible to do this in a portable way; our current solution is
* to make the user tell us (with a default value set at compile time).
* If you can actually get the available space, it's a good idea to subtract
* a slop factor of 5% or so.
*/
#ifndef DEFAULT_MAX_MEM /* so can override from makefile */
#define DEFAULT_MAX_MEM 300000L /* for total usage about 450K */
#endif
GLOBAL(long)
jpeg_mem_available (j_common_ptr cinfo, long min_bytes_needed,
long max_bytes_needed, long already_allocated)
{
return cinfo->mem->max_memory_to_use - already_allocated;
}
/*
* Backing store (temporary file) management.
* Backing store objects are only used when the value returned by
* jpeg_mem_available is less than the total space needed. You can dispense
* with these routines if you have plenty of virtual memory; see jmemnobs.c.
*/
/*
* For MS-DOS we support three types of backing storage:
* 1. Conventional DOS files. We access these by direct DOS calls rather
* than via the stdio package. This provides a bit better performance,
* but the real reason is that the buffers to be read or written are FAR.
* The stdio library for small-data memory models can't cope with that.
* 2. Extended memory, accessed per the XMS V2.0 specification.
* 3. Expanded memory, accessed per the LIM/EMS 4.0 specification.
* You'll need copies of those specs to make sense of the related code.
* The specs are available by Internet FTP from the SIMTEL archives
* (oak.oakland.edu and its various mirror sites). See files
* pub/msdos/microsoft/xms20.arc and pub/msdos/info/limems41.zip.
*/
/*
* Access methods for a DOS file.
*/
METHODDEF(void)
read_file_store (j_common_ptr cinfo, backing_store_ptr info,
void FAR * buffer_address,
long file_offset, long byte_count)
{
if (jdos_seek(info->handle.file_handle, file_offset))
ERREXIT(cinfo, JERR_TFILE_SEEK);
/* Since MAX_ALLOC_CHUNK is less than 64K, byte_count will be too. */
if (byte_count > 65535L) /* safety check */
ERREXIT(cinfo, JERR_BAD_ALLOC_CHUNK);
if (jdos_read(info->handle.file_handle, buffer_address,
(unsigned short) byte_count))
ERREXIT(cinfo, JERR_TFILE_READ);
}
METHODDEF(void)
write_file_store (j_common_ptr cinfo, backing_store_ptr info,
void FAR * buffer_address,
long file_offset, long byte_count)
{
if (jdos_seek(info->handle.file_handle, file_offset))
ERREXIT(cinfo, JERR_TFILE_SEEK);
/* Since MAX_ALLOC_CHUNK is less than 64K, byte_count will be too. */
if (byte_count > 65535L) /* safety check */
ERREXIT(cinfo, JERR_BAD_ALLOC_CHUNK);
if (jdos_write(info->handle.file_handle, buffer_address,
(unsigned short) byte_count))
ERREXIT(cinfo, JERR_TFILE_WRITE);
}
METHODDEF(void)
close_file_store (j_common_ptr cinfo, backing_store_ptr info)
{
jdos_close(info->handle.file_handle); /* close the file */
remove(info->temp_name); /* delete the file */
/* If your system doesn't have remove(), try unlink() instead.
* remove() is the ANSI-standard name for this function, but
* unlink() was more common in pre-ANSI systems.
*/
TRACEMSS(cinfo, 1, JTRC_TFILE_CLOSE, info->temp_name);
}
LOCAL(wxjpeg_boolean)
open_file_store (j_common_ptr cinfo, backing_store_ptr info,
long total_bytes_needed)
{
short handle;
select_file_name(info->temp_name);
if (jdos_open((short far *) & handle, (char far *) info->temp_name)) {
/* might as well exit since jpeg_open_backing_store will fail anyway */
ERREXITS(cinfo, JERR_TFILE_CREATE, info->temp_name);
return FALSE;
}
info->handle.file_handle = handle;
info->read_backing_store = read_file_store;
info->write_backing_store = write_file_store;
info->close_backing_store = close_file_store;
TRACEMSS(cinfo, 1, JTRC_TFILE_OPEN, info->temp_name);
return TRUE; /* succeeded */
}
/*
* Access methods for extended memory.
*/
#if XMS_SUPPORTED
static XMSDRIVER xms_driver; /* saved address of XMS driver */
typedef union { /* either long offset or real-mode pointer */
long offset;
void far * ptr;
} XMSPTR;
typedef struct { /* XMS move specification structure */
long length;
XMSH src_handle;
XMSPTR src;
XMSH dst_handle;
XMSPTR dst;
} XMSspec;
#define ODD(X) (((X) & 1L) != 0)
METHODDEF(void)
read_xms_store (j_common_ptr cinfo, backing_store_ptr info,
void FAR * buffer_address,
long file_offset, long byte_count)
{
XMScontext ctx;
XMSspec spec;
char endbuffer[2];
/* The XMS driver can't cope with an odd length, so handle the last byte
* specially if byte_count is odd. We don't expect this to be common.
*/
spec.length = byte_count & (~ 1L);
spec.src_handle = info->handle.xms_handle;
spec.src.offset = file_offset;
spec.dst_handle = 0;
spec.dst.ptr = buffer_address;
ctx.ds_si = (void far *) & spec;
ctx.ax = 0x0b00; /* EMB move */
jxms_calldriver(xms_driver, (XMScontext far *) & ctx);
if (ctx.ax != 1)
ERREXIT(cinfo, JERR_XMS_READ);
if (ODD(byte_count)) {
read_xms_store(cinfo, info, (void FAR *) endbuffer,
file_offset + byte_count - 1L, 2L);
((char FAR *) buffer_address)[byte_count - 1L] = endbuffer[0];
}
}
METHODDEF(void)
write_xms_store (j_common_ptr cinfo, backing_store_ptr info,
void FAR * buffer_address,
long file_offset, long byte_count)
{
XMScontext ctx;
XMSspec spec;
char endbuffer[2];
/* The XMS driver can't cope with an odd length, so handle the last byte
* specially if byte_count is odd. We don't expect this to be common.
*/
spec.length = byte_count & (~ 1L);
spec.src_handle = 0;
spec.src.ptr = buffer_address;
spec.dst_handle = info->handle.xms_handle;
spec.dst.offset = file_offset;
ctx.ds_si = (void far *) & spec;
ctx.ax = 0x0b00; /* EMB move */
jxms_calldriver(xms_driver, (XMScontext far *) & ctx);
if (ctx.ax != 1)
ERREXIT(cinfo, JERR_XMS_WRITE);
if (ODD(byte_count)) {
read_xms_store(cinfo, info, (void FAR *) endbuffer,
file_offset + byte_count - 1L, 2L);
endbuffer[0] = ((char FAR *) buffer_address)[byte_count - 1L];
write_xms_store(cinfo, info, (void FAR *) endbuffer,
file_offset + byte_count - 1L, 2L);
}
}
METHODDEF(void)
close_xms_store (j_common_ptr cinfo, backing_store_ptr info)
{
XMScontext ctx;
ctx.dx = info->handle.xms_handle;
ctx.ax = 0x0a00;
jxms_calldriver(xms_driver, (XMScontext far *) & ctx);
TRACEMS1(cinfo, 1, JTRC_XMS_CLOSE, info->handle.xms_handle);
/* we ignore any error return from the driver */
}
LOCAL(wxjpeg_boolean)
open_xms_store (j_common_ptr cinfo, backing_store_ptr info,
long total_bytes_needed)
{
XMScontext ctx;
/* Get address of XMS driver */
jxms_getdriver((XMSDRIVER far *) & xms_driver);
if (xms_driver == NULL)
return FALSE; /* no driver to be had */
/* Get version number, must be >= 2.00 */
ctx.ax = 0x0000;
jxms_calldriver(xms_driver, (XMScontext far *) & ctx);
if (ctx.ax < (unsigned short) 0x0200)
return FALSE;
/* Try to get space (expressed in kilobytes) */
ctx.dx = (unsigned short) ((total_bytes_needed + 1023L) >> 10);
ctx.ax = 0x0900;
jxms_calldriver(xms_driver, (XMScontext far *) & ctx);
if (ctx.ax != 1)
return FALSE;
/* Succeeded, save the handle and away we go */
info->handle.xms_handle = ctx.dx;
info->read_backing_store = read_xms_store;
info->write_backing_store = write_xms_store;
info->close_backing_store = close_xms_store;
TRACEMS1(cinfo, 1, JTRC_XMS_OPEN, ctx.dx);
return TRUE; /* succeeded */
}
#endif /* XMS_SUPPORTED */
/*
* Access methods for expanded memory.
*/
#if EMS_SUPPORTED
/* The EMS move specification structure requires word and long fields aligned
* at odd byte boundaries. Some compilers will align struct fields at even
* byte boundaries. While it's usually possible to force byte alignment,
* that causes an overall performance penalty and may pose problems in merging
* JPEG into a larger application. Instead we accept some rather dirty code
* here. Note this code would fail if the hardware did not allow odd-byte
* word & long accesses, but all 80x86 CPUs do.
*/
typedef void far * EMSPTR;
typedef union { /* EMS move specification structure */
long length; /* It's easy to access first 4 bytes */
char bytes[18]; /* Misaligned fields in here! */
} EMSspec;
/* Macros for accessing misaligned fields */
#define FIELD_AT(spec,offset,type) (*((type *) &(spec.bytes[offset])))
#define SRC_TYPE(spec) FIELD_AT(spec,4,char)
#define SRC_HANDLE(spec) FIELD_AT(spec,5,EMSH)
#define SRC_OFFSET(spec) FIELD_AT(spec,7,unsigned short)
#define SRC_PAGE(spec) FIELD_AT(spec,9,unsigned short)
#define SRC_PTR(spec) FIELD_AT(spec,7,EMSPTR)
#define DST_TYPE(spec) FIELD_AT(spec,11,char)
#define DST_HANDLE(spec) FIELD_AT(spec,12,EMSH)
#define DST_OFFSET(spec) FIELD_AT(spec,14,unsigned short)
#define DST_PAGE(spec) FIELD_AT(spec,16,unsigned short)
#define DST_PTR(spec) FIELD_AT(spec,14,EMSPTR)
#define EMSPAGESIZE 16384L /* gospel, see the EMS specs */
#define HIBYTE(W) (((W) >> 8) & 0xFF)
#define LOBYTE(W) ((W) & 0xFF)
METHODDEF(void)
read_ems_store (j_common_ptr cinfo, backing_store_ptr info,
void FAR * buffer_address,
long file_offset, long byte_count)
{
EMScontext ctx;
EMSspec spec;
spec.length = byte_count;
SRC_TYPE(spec) = 1;
SRC_HANDLE(spec) = info->handle.ems_handle;
SRC_PAGE(spec) = (unsigned short) (file_offset / EMSPAGESIZE);
SRC_OFFSET(spec) = (unsigned short) (file_offset % EMSPAGESIZE);
DST_TYPE(spec) = 0;
DST_HANDLE(spec) = 0;
DST_PTR(spec) = buffer_address;
ctx.ds_si = (void far *) & spec;
ctx.ax = 0x5700; /* move memory region */
jems_calldriver((EMScontext far *) & ctx);
if (HIBYTE(ctx.ax) != 0)
ERREXIT(cinfo, JERR_EMS_READ);
}
METHODDEF(void)
write_ems_store (j_common_ptr cinfo, backing_store_ptr info,
void FAR * buffer_address,
long file_offset, long byte_count)
{
EMScontext ctx;
EMSspec spec;
spec.length = byte_count;
SRC_TYPE(spec) = 0;
SRC_HANDLE(spec) = 0;
SRC_PTR(spec) = buffer_address;
DST_TYPE(spec) = 1;
DST_HANDLE(spec) = info->handle.ems_handle;
DST_PAGE(spec) = (unsigned short) (file_offset / EMSPAGESIZE);
DST_OFFSET(spec) = (unsigned short) (file_offset % EMSPAGESIZE);
ctx.ds_si = (void far *) & spec;
ctx.ax = 0x5700; /* move memory region */
jems_calldriver((EMScontext far *) & ctx);
if (HIBYTE(ctx.ax) != 0)
ERREXIT(cinfo, JERR_EMS_WRITE);
}
METHODDEF(void)
close_ems_store (j_common_ptr cinfo, backing_store_ptr info)
{
EMScontext ctx;
ctx.ax = 0x4500;
ctx.dx = info->handle.ems_handle;
jems_calldriver((EMScontext far *) & ctx);
TRACEMS1(cinfo, 1, JTRC_EMS_CLOSE, info->handle.ems_handle);
/* we ignore any error return from the driver */
}
LOCAL(wxjpeg_boolean)
open_ems_store (j_common_ptr cinfo, backing_store_ptr info,
long total_bytes_needed)
{
EMScontext ctx;
/* Is EMS driver there? */
if (! jems_available())
return FALSE;
/* Get status, make sure EMS is OK */
ctx.ax = 0x4000;
jems_calldriver((EMScontext far *) & ctx);
if (HIBYTE(ctx.ax) != 0)
return FALSE;
/* Get version, must be >= 4.0 */
ctx.ax = 0x4600;
jems_calldriver((EMScontext far *) & ctx);
if (HIBYTE(ctx.ax) != 0 || LOBYTE(ctx.ax) < 0x40)
return FALSE;
/* Try to allocate requested space */
ctx.ax = 0x4300;
ctx.bx = (unsigned short) ((total_bytes_needed + EMSPAGESIZE-1L) / EMSPAGESIZE);
jems_calldriver((EMScontext far *) & ctx);
if (HIBYTE(ctx.ax) != 0)
return FALSE;
/* Succeeded, save the handle and away we go */
info->handle.ems_handle = ctx.dx;
info->read_backing_store = read_ems_store;
info->write_backing_store = write_ems_store;
info->close_backing_store = close_ems_store;
TRACEMS1(cinfo, 1, JTRC_EMS_OPEN, ctx.dx);
return TRUE; /* succeeded */
}
#endif /* EMS_SUPPORTED */
/*
* Initial opening of a backing-store object.
*/
GLOBAL(void)
jpeg_open_backing_store (j_common_ptr cinfo, backing_store_ptr info,
long total_bytes_needed)
{
/* Try extended memory, then expanded memory, then regular file. */
#if XMS_SUPPORTED
if (open_xms_store(cinfo, info, total_bytes_needed))
return;
#endif
#if EMS_SUPPORTED
if (open_ems_store(cinfo, info, total_bytes_needed))
return;
#endif
if (open_file_store(cinfo, info, total_bytes_needed))
return;
ERREXITS(cinfo, JERR_TFILE_CREATE, "");
}
/*
* These routines take care of any system-dependent initialization and
* cleanup required.
*/
GLOBAL(long)
jpeg_mem_init (j_common_ptr cinfo)
{
next_file_num = 0; /* initialize temp file name generator */
return DEFAULT_MAX_MEM; /* default for max_memory_to_use */
}
GLOBAL(void)
jpeg_mem_term (j_common_ptr cinfo)
{
/* Microsoft C, at least in v6.00A, will not successfully reclaim freed
* blocks of size > 32Kbytes unless we give it a kick in the rear, like so:
*/
#ifdef NEED_FHEAPMIN
_fheapmin();
#endif
}

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/*
* jmemmac.c
*
* Copyright (C) 1992-1997, Thomas G. Lane.
* This file is part of the Independent JPEG Group's software.
* For conditions of distribution and use, see the accompanying README file.
*
* jmemmac.c provides an Apple Macintosh implementation of the system-
* dependent portion of the JPEG memory manager.
*
* If you use jmemmac.c, then you must define USE_MAC_MEMMGR in the
* JPEG_INTERNALS part of jconfig.h.
*
* jmemmac.c uses the Macintosh toolbox routines NewPtr and DisposePtr
* instead of malloc and free. It accurately determines the amount of
* memory available by using CompactMem. Notice that if left to its
* own devices, this code can chew up all available space in the
* application's zone, with the exception of the rather small "slop"
* factor computed in jpeg_mem_available(). The application can ensure
* that more space is left over by reducing max_memory_to_use.
*
* Large images are swapped to disk using temporary files and System 7.0+'s
* temporary folder functionality.
*
* Note that jmemmac.c depends on two features of MacOS that were first
* introduced in System 7: FindFolder and the FSSpec-based calls.
* If your application uses jmemmac.c and is run under System 6 or earlier,
* and the jpeg library decides it needs a temporary file, it will abort,
* printing error messages about requiring System 7. (If no temporary files
* are created, it will run fine.)
*
* If you want to use jmemmac.c in an application that might be used with
* System 6 or earlier, then you should remove dependencies on FindFolder
* and the FSSpec calls. You will need to replace FindFolder with some
* other mechanism for finding a place to put temporary files, and you
* should replace the FSSpec calls with their HFS equivalents:
*
* FSpDelete -> HDelete
* FSpGetFInfo -> HGetFInfo
* FSpCreate -> HCreate
* FSpOpenDF -> HOpen *** Note: not HOpenDF ***
* FSMakeFSSpec -> (fill in spec by hand.)
*
* (Use HOpen instead of HOpenDF. HOpen is just a glue-interface to PBHOpen,
* which is on all HFS macs. HOpenDF is a System 7 addition which avoids the
* ages-old problem of names starting with a period.)
*
* Contributed by Sam Bushell (jsam@iagu.on.net) and
* Dan Gildor (gyld@in-touch.com).
*/
#define JPEG_INTERNALS
#include "jinclude.h"
#include "jpeglib.h"
#include "jmemsys.h" /* import the system-dependent declarations */
#ifndef USE_MAC_MEMMGR /* make sure user got configuration right */
You forgot to define USE_MAC_MEMMGR in jconfig.h. /* deliberate syntax error */
#endif
#include <Memory.h> /* we use the MacOS memory manager */
#include <Files.h> /* we use the MacOS File stuff */
#include <Folders.h> /* we use the MacOS HFS stuff */
#include <Script.h> /* for smSystemScript */
#include <Gestalt.h> /* we use Gestalt to test for specific functionality */
#ifndef TEMP_FILE_NAME /* can override from jconfig.h or Makefile */
#define TEMP_FILE_NAME "JPG%03d.TMP"
#endif
static int next_file_num; /* to distinguish among several temp files */
/*
* Memory allocation and freeing are controlled by the MacOS library
* routines NewPtr() and DisposePtr(), which allocate fixed-address
* storage. Unfortunately, the IJG library isn't smart enough to cope
* with relocatable storage.
*/
GLOBAL(void *)
jpeg_get_small (j_common_ptr cinfo, size_t sizeofobject)
{
return (void *) NewPtr(sizeofobject);
}
GLOBAL(void)
jpeg_free_small (j_common_ptr cinfo, void * object, size_t sizeofobject)
{
DisposePtr((Ptr) object);
}
/*
* "Large" objects are treated the same as "small" ones.
* NB: we include FAR keywords in the routine declarations simply for
* consistency with the rest of the IJG code; FAR should expand to empty
* on rational architectures like the Mac.
*/
GLOBAL(void FAR *)
jpeg_get_large (j_common_ptr cinfo, size_t sizeofobject)
{
return (void FAR *) NewPtr(sizeofobject);
}
GLOBAL(void)
jpeg_free_large (j_common_ptr cinfo, void FAR * object, size_t sizeofobject)
{
DisposePtr((Ptr) object);
}
/*
* This routine computes the total memory space available for allocation.
*/
GLOBAL(long)
jpeg_mem_available (j_common_ptr cinfo, long min_bytes_needed,
long max_bytes_needed, long already_allocated)
{
long limit = cinfo->mem->max_memory_to_use - already_allocated;
long slop, mem;
/* Don't ask for more than what application has told us we may use */
if (max_bytes_needed > limit && limit > 0)
max_bytes_needed = limit;
/* Find whether there's a big enough free block in the heap.
* CompactMem tries to create a contiguous block of the requested size,
* and then returns the size of the largest free block (which could be
* much more or much less than we asked for).
* We add some slop to ensure we don't use up all available memory.
*/
slop = max_bytes_needed / 16 + 32768L;
mem = CompactMem(max_bytes_needed + slop) - slop;
if (mem < 0)
mem = 0; /* sigh, couldn't even get the slop */
/* Don't take more than the application says we can have */
if (mem > limit && limit > 0)
mem = limit;
return mem;
}
/*
* Backing store (temporary file) management.
* Backing store objects are only used when the value returned by
* jpeg_mem_available is less than the total space needed. You can dispense
* with these routines if you have plenty of virtual memory; see jmemnobs.c.
*/
METHODDEF(void)
read_backing_store (j_common_ptr cinfo, backing_store_ptr info,
void FAR * buffer_address,
long file_offset, long byte_count)
{
long bytes = byte_count;
long retVal;
if ( SetFPos ( info->temp_file, fsFromStart, file_offset ) != noErr )
ERREXIT(cinfo, JERR_TFILE_SEEK);
retVal = FSRead ( info->temp_file, &bytes,
(unsigned char *) buffer_address );
if ( retVal != noErr || bytes != byte_count )
ERREXIT(cinfo, JERR_TFILE_READ);
}
METHODDEF(void)
write_backing_store (j_common_ptr cinfo, backing_store_ptr info,
void FAR * buffer_address,
long file_offset, long byte_count)
{
long bytes = byte_count;
long retVal;
if ( SetFPos ( info->temp_file, fsFromStart, file_offset ) != noErr )
ERREXIT(cinfo, JERR_TFILE_SEEK);
retVal = FSWrite ( info->temp_file, &bytes,
(unsigned char *) buffer_address );
if ( retVal != noErr || bytes != byte_count )
ERREXIT(cinfo, JERR_TFILE_WRITE);
}
METHODDEF(void)
close_backing_store (j_common_ptr cinfo, backing_store_ptr info)
{
FSClose ( info->temp_file );
FSpDelete ( &(info->tempSpec) );
}
/*
* Initial opening of a backing-store object.
*
* This version uses FindFolder to find the Temporary Items folder,
* and puts the temporary file in there.
*/
GLOBAL(void)
jpeg_open_backing_store (j_common_ptr cinfo, backing_store_ptr info,
long total_bytes_needed)
{
short tmpRef, vRefNum;
long dirID;
FInfo finderInfo;
FSSpec theSpec;
Str255 fName;
OSErr osErr;
long gestaltResponse = 0;
/* Check that FSSpec calls are available. */
osErr = Gestalt( gestaltFSAttr, &gestaltResponse );
if ( ( osErr != noErr )
|| !( gestaltResponse & (1<<gestaltHasFSSpecCalls) ) )
ERREXITS(cinfo, JERR_TFILE_CREATE, "- System 7.0 or later required");
/* TO DO: add a proper error message to jerror.h. */
/* Check that FindFolder is available. */
osErr = Gestalt( gestaltFindFolderAttr, &gestaltResponse );
if ( ( osErr != noErr )
|| !( gestaltResponse & (1<<gestaltFindFolderPresent) ) )
ERREXITS(cinfo, JERR_TFILE_CREATE, "- System 7.0 or later required.");
/* TO DO: add a proper error message to jerror.h. */
osErr = FindFolder ( kOnSystemDisk, kTemporaryFolderType, kCreateFolder,
&vRefNum, &dirID );
if ( osErr != noErr )
ERREXITS(cinfo, JERR_TFILE_CREATE, "- temporary items folder unavailable");
/* TO DO: Try putting the temp files somewhere else. */
/* Keep generating file names till we find one that's not in use */
for (;;) {
next_file_num++; /* advance counter */
sprintf(info->temp_name, TEMP_FILE_NAME, next_file_num);
strcpy ( (Ptr)fName+1, info->temp_name );
*fName = strlen (info->temp_name);
osErr = FSMakeFSSpec ( vRefNum, dirID, fName, &theSpec );
if ( (osErr = FSpGetFInfo ( &theSpec, &finderInfo ) ) != noErr )
break;
}
osErr = FSpCreate ( &theSpec, '????', '????', smSystemScript );
if ( osErr != noErr )
ERREXITS(cinfo, JERR_TFILE_CREATE, info->temp_name);
osErr = FSpOpenDF ( &theSpec, fsRdWrPerm, &(info->temp_file) );
if ( osErr != noErr )
ERREXITS(cinfo, JERR_TFILE_CREATE, info->temp_name);
info->tempSpec = theSpec;
info->read_backing_store = read_backing_store;
info->write_backing_store = write_backing_store;
info->close_backing_store = close_backing_store;
TRACEMSS(cinfo, 1, JTRC_TFILE_OPEN, info->temp_name);
}
/*
* These routines take care of any system-dependent initialization and
* cleanup required.
*/
GLOBAL(long)
jpeg_mem_init (j_common_ptr cinfo)
{
next_file_num = 0;
/* max_memory_to_use will be initialized to FreeMem()'s result;
* the calling application might later reduce it, for example
* to leave room to invoke multiple JPEG objects.
* Note that FreeMem returns the total number of free bytes;
* it may not be possible to allocate a single block of this size.
*/
return FreeMem();
}
GLOBAL(void)
jpeg_mem_term (j_common_ptr cinfo)
{
/* no work */
}

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Source/3rd Party/wx/src/jpeg/jmemname.c Normal file
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/*
* jmemname.c
*
* Copyright (C) 1992-1997, Thomas G. Lane.
* This file is part of the Independent JPEG Group's software.
* For conditions of distribution and use, see the accompanying README file.
*
* This file provides a generic implementation of the system-dependent
* portion of the JPEG memory manager. This implementation assumes that
* you must explicitly construct a name for each temp file.
* Also, the problem of determining the amount of memory available
* is shoved onto the user.
*/
#define JPEG_INTERNALS
#include "jinclude.h"
#include "jpeglib.h"
#include "jmemsys.h" /* import the system-dependent declarations */
#ifndef HAVE_STDLIB_H /* <stdlib.h> should declare malloc(),free() */
extern void * malloc JPP((size_t size));
extern void free JPP((void *ptr));
#endif
#ifndef SEEK_SET /* pre-ANSI systems may not define this; */
#define SEEK_SET 0 /* if not, assume 0 is correct */
#endif
#ifdef DONT_USE_B_MODE /* define mode parameters for fopen() */
#define READ_BINARY "r"
#define RW_BINARY "w+"
#else
#ifdef VMS /* VMS is very nonstandard */
#define READ_BINARY "rb", "ctx=stm"
#define RW_BINARY "w+b", "ctx=stm"
#else /* standard ANSI-compliant case */
#define READ_BINARY "rb"
#define RW_BINARY "w+b"
#endif
#endif
/*
* Selection of a file name for a temporary file.
* This is system-dependent!
*
* The code as given is suitable for most Unix systems, and it is easily
* modified for most non-Unix systems. Some notes:
* 1. The temp file is created in the directory named by TEMP_DIRECTORY.
* The default value is /usr/tmp, which is the conventional place for
* creating large temp files on Unix. On other systems you'll probably
* want to change the file location. You can do this by editing the
* #define, or (preferred) by defining TEMP_DIRECTORY in jconfig.h.
*
* 2. If you need to change the file name as well as its location,
* you can override the TEMP_FILE_NAME macro. (Note that this is
* actually a printf format string; it must contain %s and %d.)
* Few people should need to do this.
*
* 3. mktemp() is used to ensure that multiple processes running
* simultaneously won't select the same file names. If your system
* doesn't have mktemp(), define NO_MKTEMP to do it the hard way.
* (If you don't have <errno.h>, also define NO_ERRNO_H.)
*
* 4. You probably want to define NEED_SIGNAL_CATCHER so that cjpeg.c/djpeg.c
* will cause the temp files to be removed if you stop the program early.
*/
#ifndef TEMP_DIRECTORY /* can override from jconfig.h or Makefile */
#define TEMP_DIRECTORY "/usr/tmp/" /* recommended setting for Unix */
#endif
static int next_file_num; /* to distinguish among several temp files */
#ifdef NO_MKTEMP
#ifndef TEMP_FILE_NAME /* can override from jconfig.h or Makefile */
#define TEMP_FILE_NAME "%sJPG%03d.TMP"
#endif
#ifndef NO_ERRNO_H
#include <errno.h> /* to define ENOENT */
#endif
/* ANSI C specifies that errno is a macro, but on older systems it's more
* likely to be a plain int variable. And not all versions of errno.h
* bother to declare it, so we have to in order to be most portable. Thus:
*/
#ifndef errno
extern int errno;
#endif
LOCAL(void)
select_file_name (char * fname)
{
FILE * tfile;
/* Keep generating file names till we find one that's not in use */
for (;;) {
next_file_num++; /* advance counter */
sprintf(fname, TEMP_FILE_NAME, TEMP_DIRECTORY, next_file_num);
if ((tfile = fopen(fname, READ_BINARY)) == NULL) {
/* fopen could have failed for a reason other than the file not
* being there; for example, file there but unreadable.
* If <errno.h> isn't available, then we cannot test the cause.
*/
#ifdef ENOENT
if (errno != ENOENT)
continue;
#endif
break;
}
fclose(tfile); /* oops, it's there; close tfile & try again */
}
}
#else /* ! NO_MKTEMP */
/* Note that mktemp() requires the initial filename to end in six X's */
#ifndef TEMP_FILE_NAME /* can override from jconfig.h or Makefile */
#define TEMP_FILE_NAME "%sJPG%dXXXXXX"
#endif
LOCAL(void)
select_file_name (char * fname)
{
next_file_num++; /* advance counter */
sprintf(fname, TEMP_FILE_NAME, TEMP_DIRECTORY, next_file_num);
mktemp(fname); /* make sure file name is unique */
/* mktemp replaces the trailing XXXXXX with a unique string of characters */
}
#endif /* NO_MKTEMP */
/*
* Memory allocation and freeing are controlled by the regular library
* routines malloc() and free().
*/
GLOBAL(void *)
jpeg_get_small (j_common_ptr cinfo, size_t sizeofobject)
{
return (void *) malloc(sizeofobject);
}
GLOBAL(void)
jpeg_free_small (j_common_ptr cinfo, void * object, size_t sizeofobject)
{
free(object);
}
/*
* "Large" objects are treated the same as "small" ones.
* NB: although we include FAR keywords in the routine declarations,
* this file won't actually work in 80x86 small/medium model; at least,
* you probably won't be able to process useful-size images in only 64KB.
*/
GLOBAL(void FAR *)
jpeg_get_large (j_common_ptr cinfo, size_t sizeofobject)
{
return (void FAR *) malloc(sizeofobject);
}
GLOBAL(void)
jpeg_free_large (j_common_ptr cinfo, void FAR * object, size_t sizeofobject)
{
free(object);
}
/*
* This routine computes the total memory space available for allocation.
* It's impossible to do this in a portable way; our current solution is
* to make the user tell us (with a default value set at compile time).
* If you can actually get the available space, it's a good idea to subtract
* a slop factor of 5% or so.
*/
#ifndef DEFAULT_MAX_MEM /* so can override from makefile */
#define DEFAULT_MAX_MEM 1000000L /* default: one megabyte */
#endif
GLOBAL(long)
jpeg_mem_available (j_common_ptr cinfo, long min_bytes_needed,
long max_bytes_needed, long already_allocated)
{
return cinfo->mem->max_memory_to_use - already_allocated;
}
/*
* Backing store (temporary file) management.
* Backing store objects are only used when the value returned by
* jpeg_mem_available is less than the total space needed. You can dispense
* with these routines if you have plenty of virtual memory; see jmemnobs.c.
*/
METHODDEF(void)
read_backing_store (j_common_ptr cinfo, backing_store_ptr info,
void FAR * buffer_address,
long file_offset, long byte_count)
{
if (fseek(info->temp_file, file_offset, SEEK_SET))
ERREXIT(cinfo, JERR_TFILE_SEEK);
if (JFREAD(info->temp_file, buffer_address, byte_count)
!= (size_t) byte_count)
ERREXIT(cinfo, JERR_TFILE_READ);
}
METHODDEF(void)
write_backing_store (j_common_ptr cinfo, backing_store_ptr info,
void FAR * buffer_address,
long file_offset, long byte_count)
{
if (fseek(info->temp_file, file_offset, SEEK_SET))
ERREXIT(cinfo, JERR_TFILE_SEEK);
if (JFWRITE(info->temp_file, buffer_address, byte_count)
!= (size_t) byte_count)
ERREXIT(cinfo, JERR_TFILE_WRITE);
}
METHODDEF(void)
close_backing_store (j_common_ptr cinfo, backing_store_ptr info)
{
fclose(info->temp_file); /* close the file */
unlink(info->temp_name); /* delete the file */
/* If your system doesn't have unlink(), use remove() instead.
* remove() is the ANSI-standard name for this function, but if
* your system was ANSI you'd be using jmemansi.c, right?
*/
TRACEMSS(cinfo, 1, JTRC_TFILE_CLOSE, info->temp_name);
}
/*
* Initial opening of a backing-store object.
*/
GLOBAL(void)
jpeg_open_backing_store (j_common_ptr cinfo, backing_store_ptr info,
long total_bytes_needed)
{
select_file_name(info->temp_name);
if ((info->temp_file = fopen(info->temp_name, RW_BINARY)) == NULL)
ERREXITS(cinfo, JERR_TFILE_CREATE, info->temp_name);
info->read_backing_store = read_backing_store;
info->write_backing_store = write_backing_store;
info->close_backing_store = close_backing_store;
TRACEMSS(cinfo, 1, JTRC_TFILE_OPEN, info->temp_name);
}
/*
* These routines take care of any system-dependent initialization and
* cleanup required.
*/
GLOBAL(long)
jpeg_mem_init (j_common_ptr cinfo)
{
next_file_num = 0; /* initialize temp file name generator */
return DEFAULT_MAX_MEM; /* default for max_memory_to_use */
}
GLOBAL(void)
jpeg_mem_term (j_common_ptr cinfo)
{
/* no work */
}

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Source/3rd Party/wx/src/jpeg/jpeg_CW_Prefix.h Normal file
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// Special configuration file for building jpeg under CodeWarrior
//#define HAVE_BOOLEAN

2
Source/3rd Party/wx/src/jpeg/jpeglib.h
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@ -21,7 +21,7 @@
*/
#ifndef JCONFIG_INCLUDED /* in case jinclude.h already did */
#include "jconfig.h" /* widely used configuration options */
#include "../src/jpeg/jconfig.h" /* widely used configuration options */
#endif
#include "jmorecfg.h" /* seldom changed options */

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/*
* jpegtran.c
*
* Copyright (C) 1995-1997, Thomas G. Lane.
* This file is part of the Independent JPEG Group's software.
* For conditions of distribution and use, see the accompanying README file.
*
* This file contains a command-line user interface for JPEG transcoding.
* It is very similar to cjpeg.c, but provides lossless transcoding between
* different JPEG file formats. It also provides some lossless and sort-of-
* lossless transformations of JPEG data.
*/
#include "cdjpeg.h" /* Common decls for cjpeg/djpeg applications */
#include "transupp.h" /* Support routines for jpegtran */
#include "jversion.h" /* for version message */
#ifdef USE_CCOMMAND /* command-line reader for Macintosh */
#ifdef __MWERKS__
#include <SIOUX.h> /* Metrowerks needs this */
#include <console.h> /* ... and this */
#endif
#ifdef THINK_C
#include <console.h> /* Think declares it here */
#endif
#endif
/*
* Argument-parsing code.
* The switch parser is designed to be useful with DOS-style command line
* syntax, ie, intermixed switches and file names, where only the switches
* to the left of a given file name affect processing of that file.
* The main program in this file doesn't actually use this capability...
*/
static const char * progname; /* program name for error messages */
static char * outfilename; /* for -outfile switch */
static JCOPY_OPTION copyoption; /* -copy switch */
static jpeg_transform_info transformoption; /* image transformation options */
LOCAL(void)
usage (void)
/* complain about bad command line */
{
fprintf(stderr, "usage: %s [switches] ", progname);
#ifdef TWO_FILE_COMMANDLINE
fprintf(stderr, "inputfile outputfile\n");
#else
fprintf(stderr, "[inputfile]\n");
#endif
fprintf(stderr, "Switches (names may be abbreviated):\n");
fprintf(stderr, " -copy none Copy no extra markers from source file\n");
fprintf(stderr, " -copy comments Copy only comment markers (default)\n");
fprintf(stderr, " -copy all Copy all extra markers\n");
#ifdef ENTROPY_OPT_SUPPORTED
fprintf(stderr, " -optimize Optimize Huffman table (smaller file, but slow compression)\n");
#endif
#ifdef C_PROGRESSIVE_SUPPORTED
fprintf(stderr, " -progressive Create progressive JPEG file\n");
#endif
#if TRANSFORMS_SUPPORTED
fprintf(stderr, "Switches for modifying the image:\n");
fprintf(stderr, " -grayscale Reduce to grayscale (omit color data)\n");
fprintf(stderr, " -flip [horizontal|vertical] Mirror image (left-right or top-bottom)\n");
fprintf(stderr, " -rotate [90|180|270] Rotate image (degrees clockwise)\n");
fprintf(stderr, " -transpose Transpose image\n");
fprintf(stderr, " -transverse Transverse transpose image\n");
fprintf(stderr, " -trim Drop non-transformable edge blocks\n");
#endif /* TRANSFORMS_SUPPORTED */
fprintf(stderr, "Switches for advanced users:\n");
fprintf(stderr, " -restart N Set restart interval in rows, or in blocks with B\n");
fprintf(stderr, " -maxmemory N Maximum memory to use (in kbytes)\n");
fprintf(stderr, " -outfile name Specify name for output file\n");
fprintf(stderr, " -verbose or -debug Emit debug output\n");
fprintf(stderr, "Switches for wizards:\n");
#ifdef C_ARITH_CODING_SUPPORTED
fprintf(stderr, " -arithmetic Use arithmetic coding\n");
#endif
#ifdef C_MULTISCAN_FILES_SUPPORTED
fprintf(stderr, " -scans file Create multi-scan JPEG per script file\n");
#endif
exit(EXIT_FAILURE);
}
LOCAL(void)
select_transform (JXFORM_CODE transform)
/* Silly little routine to detect multiple transform options,
* which we can't handle.
*/
{
#if TRANSFORMS_SUPPORTED
if (transformoption.transform == JXFORM_NONE ||
transformoption.transform == transform) {
transformoption.transform = transform;
} else {
fprintf(stderr, "%s: can only do one image transformation at a time\n",
progname);
usage();
}
#else
fprintf(stderr, "%s: sorry, image transformation was not compiled\n",
progname);
exit(EXIT_FAILURE);
#endif
}
LOCAL(int)
parse_switches (j_compress_ptr cinfo, int argc, char **argv,
int last_file_arg_seen, wxjpeg_boolean for_real)
/* Parse optional switches.
* Returns argv[] index of first file-name argument (== argc if none).
* Any file names with indexes <= last_file_arg_seen are ignored;
* they have presumably been processed in a previous iteration.
* (Pass 0 for last_file_arg_seen on the first or only iteration.)
* for_real is FALSE on the first (dummy) pass; we may skip any expensive
* processing.
*/
{
int argn;
char * arg;
wxjpeg_boolean simple_progressive;
char * scansarg = NULL; /* saves -scans parm if any */
/* Set up default JPEG parameters. */
simple_progressive = FALSE;
outfilename = NULL;
copyoption = JCOPYOPT_DEFAULT;
transformoption.transform = JXFORM_NONE;
transformoption.trim = FALSE;
transformoption.force_grayscale = FALSE;
cinfo->err->trace_level = 0;
/* Scan command line options, adjust parameters */
for (argn = 1; argn < argc; argn++) {
arg = argv[argn];
if (*arg != '-') {
/* Not a switch, must be a file name argument */
if (argn <= last_file_arg_seen) {
outfilename = NULL; /* -outfile applies to just one input file */
continue; /* ignore this name if previously processed */
}
break; /* else done parsing switches */
}
arg++; /* advance past switch marker character */
if (keymatch(arg, "arithmetic", 1)) {
/* Use arithmetic coding. */
#ifdef C_ARITH_CODING_SUPPORTED
cinfo->arith_code = TRUE;
#else
fprintf(stderr, "%s: sorry, arithmetic coding not supported\n",
progname);
exit(EXIT_FAILURE);
#endif
} else if (keymatch(arg, "copy", 1)) {
/* Select which extra markers to copy. */
if (++argn >= argc) /* advance to next argument */
usage();
if (keymatch(argv[argn], "none", 1)) {
copyoption = JCOPYOPT_NONE;
} else if (keymatch(argv[argn], "comments", 1)) {
copyoption = JCOPYOPT_COMMENTS;
} else if (keymatch(argv[argn], "all", 1)) {
copyoption = JCOPYOPT_ALL;
} else
usage();
} else if (keymatch(arg, "debug", 1) || keymatch(arg, "verbose", 1)) {
/* Enable debug printouts. */
/* On first -d, print version identification */
static wxjpeg_boolean printed_version = FALSE;
if (! printed_version) {
fprintf(stderr, "Independent JPEG Group's JPEGTRAN, version %s\n%s\n",
JVERSION, JCOPYRIGHT);
printed_version = TRUE;
}
cinfo->err->trace_level++;
} else if (keymatch(arg, "flip", 1)) {
/* Mirror left-right or top-bottom. */
if (++argn >= argc) /* advance to next argument */
usage();
if (keymatch(argv[argn], "horizontal", 1))
select_transform(JXFORM_FLIP_H);
else if (keymatch(argv[argn], "vertical", 1))
select_transform(JXFORM_FLIP_V);
else
usage();
} else if (keymatch(arg, "grayscale", 1) || keymatch(arg, "greyscale",1)) {
/* Force to grayscale. */
#if TRANSFORMS_SUPPORTED
transformoption.force_grayscale = TRUE;
#else
select_transform(JXFORM_NONE); /* force an error */
#endif
} else if (keymatch(arg, "maxmemory", 3)) {
/* Maximum memory in Kb (or Mb with 'm'). */
long lval;
char ch = 'x';
if (++argn >= argc) /* advance to next argument */
usage();
if (sscanf(argv[argn], "%ld%c", &lval, &ch) < 1)
usage();
if (ch == 'm' || ch == 'M')
lval *= 1000L;
cinfo->mem->max_memory_to_use = lval * 1000L;
} else if (keymatch(arg, "optimize", 1) || keymatch(arg, "optimise", 1)) {
/* Enable entropy parm optimization. */
#ifdef ENTROPY_OPT_SUPPORTED
cinfo->optimize_coding = TRUE;
#else
fprintf(stderr, "%s: sorry, entropy optimization was not compiled\n",
progname);
exit(EXIT_FAILURE);
#endif
} else if (keymatch(arg, "outfile", 4)) {
/* Set output file name. */
if (++argn >= argc) /* advance to next argument */
usage();
outfilename = argv[argn]; /* save it away for later use */
} else if (keymatch(arg, "progressive", 1)) {
/* Select simple progressive mode. */
#ifdef C_PROGRESSIVE_SUPPORTED
simple_progressive = TRUE;
/* We must postpone execution until num_components is known. */
#else
fprintf(stderr, "%s: sorry, progressive output was not compiled\n",
progname);
exit(EXIT_FAILURE);
#endif
} else if (keymatch(arg, "restart", 1)) {
/* Restart interval in MCU rows (or in MCUs with 'b'). */
long lval;
char ch = 'x';
if (++argn >= argc) /* advance to next argument */
usage();
if (sscanf(argv[argn], "%ld%c", &lval, &ch) < 1)
usage();
if (lval < 0 || lval > 65535L)
usage();
if (ch == 'b' || ch == 'B') {
cinfo->restart_interval = (unsigned int) lval;
cinfo->restart_in_rows = 0; /* else prior '-restart n' overrides me */
} else {
cinfo->restart_in_rows = (int) lval;
/* restart_interval will be computed during startup */
}
} else if (keymatch(arg, "rotate", 2)) {
/* Rotate 90, 180, or 270 degrees (measured clockwise). */
if (++argn >= argc) /* advance to next argument */
usage();
if (keymatch(argv[argn], "90", 2))
select_transform(JXFORM_ROT_90);
else if (keymatch(argv[argn], "180", 3))
select_transform(JXFORM_ROT_180);
else if (keymatch(argv[argn], "270", 3))
select_transform(JXFORM_ROT_270);
else
usage();
} else if (keymatch(arg, "scans", 1)) {
/* Set scan script. */
#ifdef C_MULTISCAN_FILES_SUPPORTED
if (++argn >= argc) /* advance to next argument */
usage();
scansarg = argv[argn];
/* We must postpone reading the file in case -progressive appears. */
#else
fprintf(stderr, "%s: sorry, multi-scan output was not compiled\n",
progname);
exit(EXIT_FAILURE);
#endif
} else if (keymatch(arg, "transpose", 1)) {
/* Transpose (across UL-to-LR axis). */
select_transform(JXFORM_TRANSPOSE);
} else if (keymatch(arg, "transverse", 6)) {
/* Transverse transpose (across UR-to-LL axis). */
select_transform(JXFORM_TRANSVERSE);
} else if (keymatch(arg, "trim", 3)) {
/* Trim off any partial edge MCUs that the transform can't handle. */
transformoption.trim = TRUE;
} else {
usage(); /* bogus switch */
}
}
/* Post-switch-scanning cleanup */
if (for_real) {
#ifdef C_PROGRESSIVE_SUPPORTED
if (simple_progressive) /* process -progressive; -scans can override */
jpeg_simple_progression(cinfo);
#endif
#ifdef C_MULTISCAN_FILES_SUPPORTED
if (scansarg != NULL) /* process -scans if it was present */
if (! read_scan_script(cinfo, scansarg))
usage();
#endif
}
return argn; /* return index of next arg (file name) */
}
/*
* The main program.
*/
int
main (int argc, char **argv)
{
struct jpeg_decompress_struct srcinfo;
struct jpeg_compress_struct dstinfo;
struct jpeg_error_mgr jsrcerr, jdsterr;
#ifdef PROGRESS_REPORT
struct cdjpeg_progress_mgr progress;
#endif
jvirt_barray_ptr * src_coef_arrays;
jvirt_barray_ptr * dst_coef_arrays;
int file_index;
FILE * input_file;
FILE * output_file;
/* On Mac, fetch a command line. */
#ifdef USE_CCOMMAND
argc = ccommand(&argv);
#endif
progname = argv[0];
if (progname == NULL || progname[0] == 0)
progname = "jpegtran"; /* in case C library doesn't provide it */
/* Initialize the JPEG decompression object with default error handling. */
srcinfo.err = jpeg_std_error(&jsrcerr);
jpeg_create_decompress(&srcinfo);
/* Initialize the JPEG compression object with default error handling. */
dstinfo.err = jpeg_std_error(&jdsterr);
jpeg_create_compress(&dstinfo);
/* Now safe to enable signal catcher.
* Note: we assume only the decompression object will have virtual arrays.
*/
#ifdef NEED_SIGNAL_CATCHER
enable_signal_catcher((j_common_ptr) &srcinfo);
#endif
/* Scan command line to find file names.
* It is convenient to use just one switch-parsing routine, but the switch
* values read here are mostly ignored; we will rescan the switches after
* opening the input file. Also note that most of the switches affect the
* destination JPEG object, so we parse into that and then copy over what
* needs to affects the source too.
*/
file_index = parse_switches(&dstinfo, argc, argv, 0, FALSE);
jsrcerr.trace_level = jdsterr.trace_level;
srcinfo.mem->max_memory_to_use = dstinfo.mem->max_memory_to_use;
#ifdef TWO_FILE_COMMANDLINE
/* Must have either -outfile switch or explicit output file name */
if (outfilename == NULL) {
if (file_index != argc-2) {
fprintf(stderr, "%s: must name one input and one output file\n",
progname);
usage();
}
outfilename = argv[file_index+1];
} else {
if (file_index != argc-1) {
fprintf(stderr, "%s: must name one input and one output file\n",
progname);
usage();
}
}
#else
/* Unix style: expect zero or one file name */
if (file_index < argc-1) {
fprintf(stderr, "%s: only one input file\n", progname);
usage();
}
#endif /* TWO_FILE_COMMANDLINE */
/* Open the input file. */
if (file_index < argc) {
if ((input_file = fopen(argv[file_index], READ_BINARY)) == NULL) {
fprintf(stderr, "%s: can't open %s\n", progname, argv[file_index]);
exit(EXIT_FAILURE);
}
} else {
/* default input file is stdin */
input_file = read_stdin();
}
/* Open the output file. */
if (outfilename != NULL) {
if ((output_file = fopen(outfilename, WRITE_BINARY)) == NULL) {
fprintf(stderr, "%s: can't open %s\n", progname, outfilename);
exit(EXIT_FAILURE);
}
} else {
/* default output file is stdout */
output_file = write_stdout();
}
#ifdef PROGRESS_REPORT
start_progress_monitor((j_common_ptr) &dstinfo, &progress);
#endif
/* Specify data source for decompression */
jpeg_stdio_src(&srcinfo, input_file);
/* Enable saving of extra markers that we want to copy */
jcopy_markers_setup(&srcinfo, copyoption);
/* Read file header */
(void) jpeg_read_header(&srcinfo, TRUE);
/* Any space needed by a transform option must be requested before
* jpeg_read_coefficients so that memory allocation will be done right.
*/
#if TRANSFORMS_SUPPORTED
jtransform_request_workspace(&srcinfo, &transformoption);
#endif
/* Read source file as DCT coefficients */
src_coef_arrays = jpeg_read_coefficients(&srcinfo);
/* Initialize destination compression parameters from source values */
jpeg_copy_critical_parameters(&srcinfo, &dstinfo);
/* Adjust destination parameters if required by transform options;
* also find out which set of coefficient arrays will hold the output.
*/
#if TRANSFORMS_SUPPORTED
dst_coef_arrays = jtransform_adjust_parameters(&srcinfo, &dstinfo,
src_coef_arrays,
&transformoption);
#else
dst_coef_arrays = src_coef_arrays;
#endif
/* Adjust default compression parameters by re-parsing the options */
file_index = parse_switches(&dstinfo, argc, argv, 0, TRUE);
/* Specify data destination for compression */
jpeg_stdio_dest(&dstinfo, output_file);
/* Start compressor (note no image data is actually written here) */
jpeg_write_coefficients(&dstinfo, dst_coef_arrays);
/* Copy to the output file any extra markers that we want to preserve */
jcopy_markers_execute(&srcinfo, &dstinfo, copyoption);
/* Execute image transformation, if any */
#if TRANSFORMS_SUPPORTED
jtransform_execute_transformation(&srcinfo, &dstinfo,
src_coef_arrays,
&transformoption);
#endif
/* Finish compression and release memory */
jpeg_finish_compress(&dstinfo);
jpeg_destroy_compress(&dstinfo);
(void) jpeg_finish_decompress(&srcinfo);
jpeg_destroy_decompress(&srcinfo);
/* Close files, if we opened them */
if (input_file != stdin)
fclose(input_file);
if (output_file != stdout)
fclose(output_file);
#ifdef PROGRESS_REPORT
end_progress_monitor((j_common_ptr) &dstinfo);
#endif
/* All done. */
exit(jsrcerr.num_warnings + jdsterr.num_warnings ?EXIT_WARNING:EXIT_SUCCESS);
return 0; /* suppress no-return-value warnings */
}