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showgif.txt
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Short: Fast GIF-viewer for the Picasso-II board
Author: rhiestan@iiic.ethz.ch
Uploader: rhiestan@iiic.ethz.ch
Type: gfx/board
=========================
ShowGIF V1.6
=========================
Sept. 11, 1994
Copyright (c) 1994 by Roman Hiestand
Copyright notice
----------------
The program ShowGIF and its documentation are written and copyrighted by
Roman Hiestand. They may be distributed freely providing the following
restrictions are satisfied:
- Distributors may not charge more than the cost of a diskette used in
the distribution of this program.
- Distributors may only distribute the unmodified copy of the original
program, along with it's documentation, and copyright notices intact.
- Commercial distribution is only possible with written permission
from the author.
Disclaimer
----------
This program and its documentation is provided "as is". No warranties are made
with respect to the accuracy, reliability, performance or operation of this
software and information. You are using this program at your own risk. The
author is not liable for any damages that may have been caused by using this
software.
Description
-----------
ShowGIF is, as the name says, a GIF viewer for the Picasso-II graphics board
of VillageTronic.
The program can be started from CLI or Workbench with one or more file
names/icons. If the program cannot load an image (because you didn't submit
a filename or the file doesn't exist), a file requester pops up.
Usage
-----
From CLI: ShowGIF Image [...]
Template: FILES/M,BUF/N,DELAY/N
FILES/M: One or more filenames to be viewed
If no filenames are given or the files weren't GIFs, a
file-requester pops up.
BUF/N: Specify the FileBufferSize in KB, like BUF 100
DELAY/N: Specifies the delay in seconds after showing the
picture. If none is given, the program waits for
a key or a mousebutton.
Remember: during this delay, the program can't be
stopped !
Examples:
ShowGIF BUF=5 SYS:Images/Globe.gif
ShowGIF DF0:Pictures/Mercedes.gif DF0:Pictures/Family.GIF BUF 10 DELAY 5
From Workbench:
- Default Tool: Specify ShowGIF as the default tool of an image
- Multiple selection: With the shift-key pressed, select an image and
double-click on ShowGIF's icon.
There are no arguments from the WB.
Features
--------
- fully programmed in assembler
- uses a file buffer (50 KB by default)
- CLI or WB start
- very system-friendly
- (nearly) pure
- can be aborted at anytime (except during a crash ... :-) )
- no 'light' background (since V1.1)
- file requester (since V1.2)
- FileBufSize can be specified (since V1.3)
- supports entire GIF87a standard (local color maps, interlaced images,
multiple images, since V1.5)
- supports partly GIF89a standard (comment/plain text extension)
Requirements
------------
Kick 2.0 and vilintuisup.library version > 2.0.
Revisions
---------
1.0 - first public release
1.1 - added support for interlaced images
now fills background with darkest color
1.2 - file requester added
1.3 - now checks for Ctrl-C (requested by Markus Illenseer)
corrected a bug in GetCode
added CLI-option BUF
1.4 - Multiple images supported
Output window for workbench
Faster ~10 %
1.5 - Doesn't quit anymore if GIF-revision is >89a
Supports Local color table
Correctly processes (skips) GIF89a extension blocks
CLI-option DELAY
some small optimisations
1.6 - Now supports some GIF89a extensions
even faster !
1.61 - Oops: forgot the titlebar in the file requester
Address
-------
I can be reached at
Roman Hiestand
Luziaweg 15
CH-8807 Freienbach
Switzerland
Fax: CH-055/48 26 37
email: rhiestan@iiic.ethz.ch
============================= Archive contents =============================
Original Packed Ratio Date Time Name
-------- ------- ----- --------- -------- -------------
3188 2147 32.6% 12-Sep-94 22:00:06 ShowGIF
6251 3013 51.7% 17-Sep-94 18:09:24 ShowGIF.doc
826 300 63.6% 03-Jul-94 21:58:54 ShowGIF.info
-------- ------- ----- --------- --------
10265 5460 46.8% 19-Sep-94 16:54:50 3 files