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-
- ShowGIF V1.01
- (C) 1993 by Christophe PASSUELLO
- --------------------------------
-
- ShowGIF is a GIF viewer, it takes advantage of the new AGA chipset, it
- allows scrolling, it support wild-card and Workench. It's always the
- FASTEST GIF viewer on Amiga.
-
- ShowGIF can't be sold alone or in any package, but you can freely
- distribuate it on PD's disks (like Fred Fish one) or on any BBS only if
- complete and unmodified.
-
-
- DISCLAIMER
- ----------
-
- The author isn't responsable of any damages resulting of ShowGIF use.
-
-
- REQUIREMENTS
- ------------
-
- Before starting ShowGIF, you must be sure to have the Arp.library in your
- LIBS: directory.
-
-
- PRESENTATION
- ------------
-
- ShowGIF displays pictures with more than 32 colors using gray-scale, and
- using color if the picture don't have move than 32 colors. If you own a new
- Amiga with AGA chipset (A1200 & A4000), display will use colors even with a
- 256 colors picture.
-
- With ShowGIF you can't specify contrast and brightness for gray-scaled
- pictures, to do this check out for FastGIF II my GIF viewer with an user
- interface (Saving to IFF with registered version).
-
- There is still some little problems with AGA chipset: when you use hires
- switch during display the image may looks strange, these little problems
- will be fixed as soon as i will receive docs about the new libraries of
- WorkBench 3.0.
-
-
- FEATURES
- --------
-
- - Can be run from WorkBench or CLI.
-
- - Automaticly adjust screen size regarding picture size.
-
- - Very fast, mains routines are written using very highly optimised assembler
- (twice faster than TurboGIF).
-
- - It should be even faster with 32 bits cards because the assembly routines
- are small enough to fit in the cache. (I suggest you to set on the cache
- instruction using CPU or SetCPU).
-
- - It displays GIF89a files.
-
- - It works on NTSC or PAL.
-
- - You can scroll picture.
-
- - It handles corrupted GIF files.
-
- - Completly multitasking.
-
- - Multiple wild-card for slide-show.
-
- - ShowGif is pure
-
-
-
- RUNNING ShowGIF WITH CLI
- ------------------------
-
- ShowGif is now pure so you can, you can make it resident.
-
- Usage: ShowGIF <Patterns> [-aga] [-low] [-all] [-agif]
-
- You can specify more than one pattern in the command line.
- Example: ShowGIF df0:*.gif dh0:GIFPictures/* GIF:A*
-
- -low : This can you help when you are low on memory, with this option
- you can display a 640*512 picture with 512 KB CHIP and 512 KB
- FAST. (May slow down decompression).
-
- -aga : Set this flag if you have a new Amiga with AGA chipset.
-
- -all : With this flag, ShowGIF will scan recursivly all directories
- from the specified directory.
-
- -agif : Set this flag if the GIF pictures come from Amiga. It is used
- to do a better guess of picture ratio.
-
- ShowGIF will display pictures one after each other, you can stop ShowGIF
- with a CTRL/C.
-
-
- RUNNING ShowGIF WITH WORKBENCH
- ------------------------------
-
- Click on the icons of disks, drawers and files to view while holding down
- the SHIFT key, and double-click on the ShowGIF icon.
-
- You can set the following Tools Types (With Info item of WorkBench menu).
-
- LOWMEM=ON : This can you help when you are low on memory, with this
- option you can display a 640*512 picture with 512 KB CHIP
- and 512 KB FAST. (May slow down decompression).
-
- CHIPAGA=ON : Set this flag if you have a new Amiga with AGA chipset.
-
- ALL=ON : With this flag, ShowGIF will scan recursivly all directories
- from the specified directory.
-
- AMIGAGIF=ON : Set this flag if the GIF pictures come from Amiga. It is
- used to do a better guess of picture ratio.
-
- ShowGIF will display pictures one after each other, you can stop ShowGIF
- with a CTRL/C.
-
-
- ONCE RUNNING
- ------------
-
- Once ShowGIF displays the picture, you can use the following keys:
-
- L : switch Interlace
- H : switch Hires
- O : switch Overscan
- ESC : close the screen
-
- To scroll picture use cursor keys, with SHIFT scrolling will use 16 pixels
- step, with ALT you to go to border of the screen. Click on right mouse
- button to close the screen.
-
-
- TO DO
- -----
-
- - Double buffering ?
-
-
- AUTHOR
- ------
-
- Send me any suggestion, bugs-report, flames, donations, etc....
- I'am looking for docs about the graphics.library to use 24 bits palette,
- to look for avaible display mode (sources, examples, includes and LVOs),
- to improve this viewer.
- I'm looking also for docs about PCX, PIC and BMP or other format to write a
- multi-format viewer.
-
- For bugs-report send informations about your config:
- ShowGIF version, witch processor, version of Workbench, how many RAM you
- own (CHIP & FAST), ...
-
-
- You can contact me at the following address:
-
- Christophe PASSUELLO
- 25, Rue du Plateau
- 91600 SAVIGNY SUR ORGE
- FRANCE
-
-
-
- CREDITS
- -------
-
- * ShowGIF use the great Arp.library for pattern matching.
- * GIF Format is Copyright (c) CompuServe Incorporated.
- * Thanks to Thierry Andeol and Arto Ikola for beta-testing and suggestions.
-
-
- HISTORY
- -------
-
- - RELEASE V1.00
-
- First release.
-
-
- - RELEASE V1.01 (Jun 21 1993)
-
- ShowGif is now pure.
- Best AGA support (64 bits aligned bitmap width, 24 bits palette).
- AppIcon for workbench 2.x
- Small bugs fixed.
-
-
- ---------- Enjoy GIF on Amiga ----------
-