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-
- Q P E G
- ___________
- ~^~^~^~^~^~
-
- A fast JPEG viewer for MS-DOS. VGA graphics and 80386+ required.
- ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
-
- Copyright (c) 1993/94 by TBH-Softworx -- all rights reserved
- Oliver Fromme, Klingestr. 2, 38640 Goslar, Germany
- Internet email: inof@asterix.rz.tu-clausthal.de
-
- Version 1.3b (beta) of 14-Jan-1994
-
- This program is Shareware. You may copy it, use it, give it to your friends,
- upload it to a BBS or something similar, under the following conditions:
-
- * Don't charge any money for it. If you upload it to a BBS, make sure that
- it can be downloaded free (without paying for downloading it, except
- for usage fees that have to be paid anyway).
- * Only distribute the whole original package, with all the files included.
- * Don't change the files in any way, except:
- You may change the INI, CFG, ASM, and DRV files for private purposes.
- Don't distribute modified versions of these files to others without
- prior permission of the author of QPEG.
- * QPEG may not be part of any commercial product or service without my
- written permission.
- * If you want to include QPEG on a CD ROM and/or book, you must send me
- a free copy of the CD/book.
- * QPEG may not be used in any corporate or gouvernment institution without
- being registered.
-
- This software consists of the following files:
- - QPEG.EXE the main executable file
- - QPEG.INI initialization file (ASCII text)
- - QPEG.DAT data file for QPEG (don't modify!)
- - QPEG.DO? the documentation
- - CHANGES.DO? list of changes from previous versions
- - INSTALL.DO? how to configure QPEG
- - FAQ.DO? frequently asked questions
- - REGISTER.FRM registration form
- - JPEGUNIT.PAS order form for the JPEG Pascal unit
- - TBHGLOGO.RLE TBH logo for user interface
- - CFG\*.CFG various configuration files
- - CFG\CFG.DOC description of the configuration file format
- - DRV\*.DRV various video driver files
- - DRVSRC\*.ASM source codes for the video drivers
- - DRVSRC\DRV.DOC description of the video driver file format
- Text files with a DOK extension are German, those with a DOC extension
- are English.
- There may also be some example JPEG files. They are not part of the QPEG
- software package.
-
- IMPORTANT: Using modes that your hardware (graphics card and/or monitor)
- can't handle can damage your hardware! Be sure to use only supported
- modes. If you come across a mode which looks flickering or unstable
- (i.e. the monitor can't hold the picture), abort QPEG immediately and
- delete that mode from the configuration file.
-
- YOU ARE USING QPEG AT YOUR OWN RISK! THE AUTHOR (OLIVER FROMME) IS NOT
- RESPONSIBLE FOR ANY DAMAGE CAUSED BY THE USE OF QPEG OR BY THE INABILITY
- TO USE QPEG. IF YOU ARE NOT SURE ABOUT THIS, OR IF YOU DON'T ACCEPT THIS,
- THEN DO NOT USE QPEG!
-
- QPEG is inexpensive shareware. If you continue using it after a trial
- period of 30 days, you are encouraged to pay a small registration fee.
- (I try to avoid saying that you MUST register, but actually you MUST.)
- The registration is valid for all future updates. The source code of the
- JPEG decoding routines used by QPEG is also available.
- To become a registered user, please print the file REGISTER.FRM and send
- it to me with appropriate payment. If you want to get the JPEG source code,
- print the file JPEGUNIT.PAS instead.
-
- All product names mentioned in this software are trademarks or registered
- trademarks of their respective owners.
-
- "The Graphics Interchange Format(c) is the Copyright property of
- CompuServe Incorporated. GIF(sm) is a Service Mark property of
- CompuServe Incorporated."
-
- -----------------------------------------------------------------------------
-
- What is QPEG?
- ~~~~~~~~~~~~~
-
- QPEG (Quick-jPEG, pronounce "Q-Peg" [kju:peg]) is a viewer for JPEG image
- files. It is about twice as fast as other common JPEG viewers. Compare
- it yourself, you'll be surprised.
-
- JPEG (Joint Photographic Experts Group, pronounce "Jay-Peg") is an image file
- format which uses a "lossy" compression. JPEG images (they have usually a
- "JPG" file extension) are normally very small and offer better compression
- than any other image format.
-
- Decoding of JPEG images is a rather complicated process, thus it needs a lot
- of computing power and performance. QPEG takes advantage of the advanced
- features of 80386 CPUs, and it uses large look-up tables instead of formulas.
- Well, I don't want to get into details. It's fast, that's all you could want
- to know.
-
-
- Features
- ~~~~~~~~
-
- - It's fast (have I mentioned that before?).
- - Nice preview ability which is even faster (lets you quickly browse through
- lots of images, very useful if you're searching for a certain image).
- - Works even with a standard VGA card (320x200x16, 640x480x16, 320x200x256).
- - Supports many SVGA cards (virtually all with VESA capability).
- - Uses truecolor (16M color), hicolor (32K color), 256 color (either
- greyscale or dithered color), and 16 color (dithered greyscale) modes.
- - You can pan across an image which is bigger than the current screen
- resolution (scrolling). Some XMS and/or EMS memory is needed for this.
- - You can change the resolution without loading/decoding the image again
- (this is restricted to the same color resolution, for example you can't
- switch from hicolor to truecolor without reloading the image).
- - Supports also the following image file formats:
- * GIF:
- + interlaced and non-interlaced
- + GIF87a and GIF89a (87a subset only)
- + displays the first image of a multi-image GIF
- * Targa (TGA):
- + truecolor (15, 16, 24 and 32 bit), greyscaled, or with palette
- + uncompressed or rle compressed (run length encoded)
- + supports all video modes (16, 256, 32K, 64K, 16M)
-
-
- Requirements
- ~~~~~~~~~~~~
-
- - 80386 or better CPU (33 MHz minimum recommended)
- - VGA graphics card (SuperVGA recommended, though QPEG will run on any
- standard VGA card)
- - some XMS and/or EMS memory (depending on the size of the images), though
- QPEG will also run without any XMS/EMS, but then you will be unable to
- do any panning/scrolling
- - MS-DOS 5.0
-
- A numeric coprocessor is not required. If present, it will not be used,
- because it would not speed up decoding/displaying.
-
-
- Using QPEG
- ~~~~~~~~~~
-
- At first you have to configure QPEG for your video hardware. Please read
- the file INSTALL.DOC for more information.
-
- Then just type 'QPEG' to run it. There are some command line options
- (type 'QPEG /?' to get a help message), but they're usually not needed.
-
- The graphical user interface of QPEG is rather intuitive, so there is no
- need for much documentation. Press the 'F1' key to get a list of all
- keyboard functions. Hit '?' to get a list of keys that can be used while
- viewing an image. You can quit QPEG at any time by hitting Alt-X.
-
- QPEG can also be used as command line viewer (without graphical user
- interface). Type 'QPEG' followed by one or more names of files.
- Wildcards ('*' and '?') are allowed, too.
-
-
- Restrictions and Bugs
- ~~~~~~~~~~~~~~~~~~~~~
-
- QPEG can't handle all kinds of JPEG images. Specifically, it can only decode
- files which comply with the JFIF standard. See 'Technical Information' below
- for more details.
-
- The maximum image width is 4000 pixel. QPEG will refuse to decode larger
- images. The image height is not limited, but if it's too large it may not
- fit into memory (XMS/EMS), thus you can't see the bottom part when scrolling
- down. If this happens, try to use a video mode with less colors, because it
- needs less memory. Or buy more memory :-)
-
-
- How to get an updated version of QPEG
- ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
-
- This version is most probably not the last one. There are several ways
- to get an up-to-date version of QPEG:
-
- - You can get it free by FTP via The Internet. Of course that's only
- possible if you've got access to The Internet. You can find QPEG at
- 'ftp.tu-clausthal.de' (139.174.2.10) in /pub/msdos/graphics. There's
- also a mail server available at 'mail-server@rz.tu-clausthal.de'.
- I also upload QPEG to 'ftp.wustl.edu' in /pub/MSDOS_UPLOADS/graphics.
-
- - You can get it free (except for phone costs) via Fidonet or simply by
- modem from the "Cyberbox" (Germany):
- Line 1 2:2426/2030 (0441-391452), 9600-19200bps
- Line 2 2:2426/2031 (0441-9390942), 2400-19200bps
- Line 3 2:2426/2032 (0441-9390943), 2400-19200bps
- Line 4 2:2426/2033 (0441-9390944), 38400-64000bps (ISDN)
- Fidonet users can request the current version of QPEG at the addresses
- above using the magic "QPEG".
-
- - You can get it by registering QPEG. See REGISTER.FRM for more
- information. The registration is valid for all future updates of QPEG.
-
- - If you're already a registered user, you can get an updated version
- on disk via normal mail, but that costs 10 $US or 10 DM to cover my
- expenses. Before sending me money, make sure that there IS an updated
- version (otherwise you might be disappointed because you got the same
- version you already have).
- You can find my mail address at the top of this documentation or
- by entering 'QPEG /?'.
-
-
- Future Enhancements
- ~~~~~~~~~~~~~~~~~~~
-
- As mentioned before, this is probably not the last version of QPEG.
- These features are planned for future versions:
- - Support for more image formats, e.g. Targa, PCX, BMP.
- - Mouse support (point and click).
- - Tagging multiple files and view them in sequence.
- - Slideshow option (preloading images, but panning disabled).
- - Shrinking of big images.
- - Option for automatically choosing the appropriate video mode.
- - Support for 4DOS/NDOS description files.
- - Support for more SVGA cards. If you've written a working video driver
- that isn't already distributed with QPEG, I would be most grateful if
- you send it to me.
- - More enhancements. If you have any ideas, wishes, comments etc, please
- let me know.
-
-
- Technical Information
- ~~~~~~~~~~~~~~~~~~~~~
-
- QPEG can decode greyscaled images (containing a single component using h1v1
- upsampling) and YCbCr true color images (containing three interleaved
- components in a single scan, using either Yh2v2, Yh2v1 or Yh1v1 upsampling
- for Y and Ch1v1 for Cb/Cr), covering virtually all JFIF files in use today.
-
- QPEG can handle files that contain restart markers, but it will not use them
- for error recovery. QPEG can also display JPEG files which were created
- with the 'Adobe Photoshop' (at least version 2.5).
-
- The basic JPEG decoding routines are written in pure 386 assembly language,
- everything else is written using Borland Pascal 7.0. I am not using
- protected mode, because it would slow down the decoding rather than speeding
- it up. I have linked the JPEG routines into a single easy to use Pascal
- unit, which can also be used within other applications. If you want to
- purchase the unit, please print the file JPEGUNIT.PAS and send it to me with
- appropriate payment.
-
- The JPEG unit provides procedures to open and close a JPEG file, read the
- file header, and read the image row by row. It contains routines which
- output the lines as 24 bit true color RGB/BGR, 15/16 bit hicolor, 256 color
- dithered, 256 color greyscaled, 16 color grayscaled/dithered, and 16 color
- greyscaled/dithered for preview (scaled to one eigth or one fourth).
-
-
- Equipment used for Development of QPEG
- ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
-
- Hardware:
- - intel 80386/33 DX, 80387/33 DX, 64 Kb cache, 8 Mb, SIS chipset, AMI BIOS
- - 780 Mb of harddisk space (Conner, WD, Quantum), both IDE and SCSI
- - magneto optical disk drive (Fuji), 15 optical disks (2 Gigabytes)
- - CD-ROM drive (Toshiba, doublespin)
- - 250 Mb tape streamer, 5 tapes (1.25 Gigabytes)
- - Cardex-8 graphics card, Tseng ET4000 chipset, 1024 Kb, truecolor (16.8 M)
- - 15" color SVGA monitor w/ digital control & LCD display
- - Advanced Gravis Ultrasound (GUS) 1 Mb, Soundblaster, 200 W amplifier
- - 400 dpi greyscale scanner
- - NEC P60 dot matrix printer
- - Genius mouse
- - Lots of 3.5" HD floppy disks (mainly 3M and Fuji)
-
- Software:
- - MS-DOS 5.0 by Microsoft
- - Borland Pascal 7.0 by Borland Int.
- - Turbo Assembler 3.2 by Borland Int.
- - XKEY, KEEP8, BOO by Oliver Fromme
- - PKTINY 1.1 by Thomas Mönkemeier
- - WCED 1.8c by Stuart Russell (Wormsoft)
- - TURBODSK 1.1 by Ciriaco García de Celis
-
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