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- **** Documentation for TigaShow ***
- **** (just a few lines indeed) ****
- ***********************************
- ******** this is version 1.5 ******
- **** written by Thomas Herlyn *****
- ***********************************
- *********** GiftWare **************
- ***********************************
-
- Introduction:
- -------------
- This program displays images on the Commodore A2410/TIGA graphics board.
- Currently images stored in the common GIF (Graphic Interchange Format,
- by CompuServe), JPEG (thanks to the independant JPEG group) and PPM
- (thanks to people supporting the NETPBM package) are supported.
- This is the first PD-program specialized to this board, I think
- (Laire, your PostView doesn't work on my board, unfortunately).
- It is Giftware in the current development phase. This means you don't have
- to pay anything, but if you use it often and / or you love it, please send
- me anything you want (mails, presents, programs, ZIP-Rams for A3000 etc.).
- The Copyright remains to me.
-
- Requirements:
- -------------
- - at least Kickstart 1.3
- - C= A2410/TIGA graphics board
- - A2410.DEVICE in DEVS:
- - TIGA initialized by the command LOADTIGA
- - IEEE libraries (by C=) in LIBS:
- - JPEGTMP: assigned anywhere to your harddisk (or to RAM, if you have
- lots of it)
- - JPEGMEM (an environment variable) set to the amount of ram in KBYTEs you
- think you can afford for viewing JPEGs
- - a few images (* grin *)
-
- Installation:
- -------------
- Copy TigaShow anywhere you want. Assign JPEGTMP: to a place with a lot of
- free RAM (for example to your Harddisk or RAM:),
- example: Assign JPEGTMP: WORK: . Set the environment variable JPEGMEM to the
- amount of RAM in KBYTES you think you can afford for viewing JPEGs, example:
- SetEnv JPEGMEM 200 (200 KBytes for JPEGs), more memory gets allocated on
- JPEGTMP: . SetEnv JPEGMEM 0 will work, too. That's it!
-
- Usage:
- ------
- from CLI: TigaShow <Path and Filename>
-
- from Workbench: Click on TigaShow icon, SHIFT-DoubleClick on the image icon,
-
- then look...
- and be amazed.
-
- for a little diashow:
- from CLI: TigaShow <Path1 and Filename1> <Path2 and Filename2> <...>
-
- from Workbench: Click on the TigaShow icon, SHIFT-click the next image icons
- and SHIFT-doubleclick the last image icon,
-
- Features:
- ---------
- - quite fast (especially on GIFs, slower on JPEGs and slow on PPMs, I think)
- - centers the picture if it is smaller than the standard TIGA screen
- - does (Floyd-Steinberg) dithering on JPEGs and PPMs
- - Diashow option
- - can be invoked by CLI and WB (look above for USAGE)
- - supports GIF, JPEG, PPM
- - uses IEEE libraries, so automatically uses math coprocessor if available
-
- SoonToCome (ToDo);
- ------------------
- - scrolling for pictures larger than the TIGA screen.
- - IFF support
- - File requester
- - GrayScale forcing
-
- Hints:
- ------
- You can use TigaShow for looking IFFs, too. You can convert any IFF to a PPM
- format first (with ILBMTOPPM) and watch this PPM image with TigaShow. Using
- the NETPBM package you are able to view any type of image format. Get it if
- you want to view a picture whose format is not supported by TigaShow yet, I
- can't think of a format not supported by NETPBM.
- Unfortunately, piping is not possible anymore due to the automatic picture
- type recognition of TigaShow.
-
- Comments:
- ---------
- A2410.DEVICE and LOADTIGA are not included since these are copyrighted
- by Commodore, I think. You have to get them elsewhere.
- Interlaced GIFs are not supported yet.
- If you are interested in a version specialized to 68030/68881 please contact
- me (I personally use this version, but have not compared the speed of this
- IEEE library version to the 030/881 one yet).
-
- Credits:
- --------
- The source is loosely based on the source of the JPEG distribution of the
- Independant JPEG Group and and on ppmqvga included in the NETPBM package.
- Many thanks to the authors.
-
- Thomas Herlyn
-
- Send Bug reports, gifts, mails etc. to
-
- Thomas Herlyn EMail: Thomas.Herlyn@Informatik.Uni-Oldenburg.DE
- bei Willms IRC: tomh
- Rostocker Strasse 29
- Germany 26121 Oldenburg
-