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1995-05-25
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175 lines
Short: Versatile picture viewer
Type: gfx/show
Author: jow@hcast.franken.de
Uploader: jow@hcast.franken.de
JIV is a picture viewer. I can imagine that you're wondering
now why I had to write yet another one... well, here's a list
of features that should answer your question:
· JIV supports many different file formats:
- GIF (full GIF87a standard plus a subset of GIF89a).
- BMP (MS-Windows and OS/2 variants, currently only
uncompressed).
- IFF-ILBM (including HAM6, HAM8, EHB and 24bit formats).
- PNM pictures (PBM, PGM and PPM in both binary and
ASCII format).
- PCX (8bit/VGA, 24 bit, monochrome and _some_ 4 bit)
- JPEG/JFIF, if the JPEG CODEC is installed.
· JIV supports several types of display hardware:
- all native graphics chipsets (OCS, ECS and AGA).
- Cybergraphics emulation.
- A2024.
- Picasso-II/Village emulation.
- Generic mode, should work with every graphics board that
emulates Workbench/Intuition. Tested with the Picasso-II
emulation and the Cybergraphics emulation.
· JIV supports displaying over-sized images using autoscroll.
· JIV supports multiple filenames and AmigaDOS pattern
matching.
· JIV can dither pictures that use more colors than your
display hardware supports.
· JIV offers an endless/slideshow mode that can be used for
(non-interactive) advertising, for example in a shop window.
Please note that JIV is probably not the best choice for
"small" Amiga configurations. It will need a lot of memory and
(in some cases) quite a bit of computing power as well.
The minimum configuration for JIV is:
· 68000 or better.
· AmigaOS 2.04 (V37) or better.
· 1 MByte or more of RAM.
This configuration should allow you to view small to medium-sized
pictures (640x480x8 should just be possible).
The suggested configuration for JIV is:
· 68030 or better.
· AmigaOS 3.1 (V40) or better.
· 4 MBytes of RAM or more.
· Hard disk drive.
This configuration will allow you to view most pictures you're
likely to find. A bit more RAM wouldn't hurt, though. :-) And
of course you'll need a graphics board if you want to display
true-color pictures without dithering.
Distribution License
This version of JIV may be distributed freely for
non-commercial purposes only. You must distribute the entire
archive INTACT and UNCHANGED, that is, you are NOT allowed
to add files to the archive or remove files from the archive
or change files in the archive.
Specifically, you're allowed to:
· Distribute JIV on floppy-disk-based collections of
PD software.
· Distribute JIV on CDROM-based collections of PD software IN
ARCHIVED FORM ONLY, unless you obtain a specific license
from the author.
· Distribute JIV electronically, for example through email or
FTP, or through BBS systems.
BBS sysops, do NOT add those pesky BBS advertisments to the
archive!
Specifically, you're NOT allowed to:
· Distribute parts of the archive or changed/patched versions
of the files in this archive.
· Distribute JIV on CDROM in ready-to-run form, unless you
obtain a specific license from the author first.
· Distribute JIV in any form on CDROMs that contain
picture collections, unless you obtain a specific license
from the author first.¹
· Distribute JIV bundled together with a commercial product
(software, hardware or other), unless you obtain a specific
license from the author first.
I have been informed that in the U.S. a patent has been
granted for the LZW compression algorithm used in the GIF
file format, and that the patent holder requires a license
fee for use of this algorithm in commercial software
(including shareware). Therefore I will not ask for any
shareware fees from U.S. users of JIV.
Please do not confuse this distribution license, which details
the terms and conditions for DISTRIBUTING JIV, with the
shareware license which details the terms and conditions for
USING JIV.
¹ Permission is granted to include ARCHIVED versions of JIV on
the following CDROMs even if these CDROMs contain picture
collections:
· Aminet
· Fish
· Saar/AMOK
Angela Schmidt has my permission to install JIV in both
archived and ready-to-run form on the Meeting-Pearls-II
CDROM.
Todo:
· support for additional image file formats:
- TIFF
- Icon
- XBM
- Targa
- others
· AREXX port
· Image manipulation and format conversion.
Known problems:
· If you're using an A4000/040 kickstart file on a computer
with a CPU <= 68020, the DISPLAY=GENERIC may crash your
machine. This is not a bug in JIV. The BestModeIDA() system
call in the A4000 kickfile seems to contain an instruction
that is only available on 68030 and above.
There are only two kinds of people who use A4000 kickstart
files on CPUs below 68030: former registered developers
and software pirates.