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-
- ST to TT Picture Converter v1.10
- Documentation
-
- Released on July 25, 1992
-
- Copyright 1992 by Lonny L. Pursell and ENCOM
- All Rights Reserved.
-
-
-
-
- Archive Contents
- ----------------
-
- This archive should contain the following files.
-
- ST2TTPIC.PRG the utility program itself
- ST2TTPIC.DOC this doc file
-
-
- Introduction
- ------------
-
- This program will convert Spectrum 512 and GFA Raytrace files into
- Prism-Paint files. Neither Spectrum or Raytrace function on the TT
- but why should that stop TT owners from viewing the images they can
- create. I decided on Prism-Paint output since I own Prism-Paint and
- it supports TT low resolution. Since Prism-Paint reads quite a few
- file formats, I see this program as a companion to Prism-Paint to fill in
- the gaps for users who would like Spectrum 512 support. I threw in the
- Raytrace support since it is similar to Spectrum.
-
-
- This program is ShareWare!
- --------------------------
-
- All versions of this program are 'ShareWare', this means that if
- you decide to use it you're expected to pay for it. You pay for the
- commercial programs you use, right? Why not pay for the ShareWare you
- use as well? Rememeber, ShareWare doesn't happen by accident. The
- author spent time writing the software and relies on your honesty
- as an Atari Computer owner.
-
- The registration fee is $5.00 ... or send what you think it's worth.
-
- If you do decide to use it, please send a check or money order
- in U.S. funds to...
-
- Lonny L Pursell
- Attn ST2TTPIC
- PO Box 145
- Pandora OH 45877 USA
-
- I thank you for your support! Please remember, if you want to see
- more ShareWare programs like this, you have to do your part and pay for
- the ShareWware programs you use.
-
- ----User Support----
-
- If you have an idea for a feature or want to report a bug (if any)
- then by all means contact me. Please include the full name and
- version# of the program you are refering to.
-
- I can be reached by U.S. Mail at the address above or by telephone at
- (419)-384-3594 [ask for Lonny]...
-
- I can also be reached on my FAVORITE multi-line BBS...
-
- CodeHead Quarters BBS
- (213)-461-2095
- 1200/2400/9600 baud
- Username: Lonny Pursell
-
-
- Before you get started
- ----------------------
-
- Runs on a TT030 in TT low resolution only.
- Reads GFA Raytrace 'SUL' uncompressed files only.
- Remember, Raytrace crashes on a TT so you'll need an ST or STE!
- You must first uncompress the file you wish to convert. To do this
- you need to load GFA Raytrace and turn off the 'Compression' feature
- under the 'Status' option from the editor. Load the picture and
- then resave it and it will be uncompressed.
- Reads Spectrum 512 'SPU' uncompressed or 'SPC' compressed files.
- Writes TT low rez uncompressed Prism-Paint 'PNT' files only.
-
- ----To use the program----
-
- Double-click on the program from the GEM Desktop. The program uses
- the GEM interface so you'll soon see a menu bar at the top of the screen.
-
- The drop down menus:
-
- DESK
- Desktop Info Displays the program credits.
-
- FILE
- Load Spectrum 512 Loads a Spectrum 512 pic directly to the screen
- where it's scanned into an internal buffer.
- Load GFA Raytrace Loads a GFA Raytrace pic. (same as above)
- Save Prism-Paint Save the currently loaded pic to disk in
- Prism-Paint format.
- Quit Returns you to the GEM Desktop.
-
- VIEW
- Color Info Shows some statistics about the currently loaded
- pic like total colors, etc.
- Show Picture Redisplays the pic to the screen. Press any key
- to exit.
- Redraw Picture Converts the image to TT low rez directly on the
- screen and averages out any colors beyond 256.
- Press any key to exit.
-
- Options
- Full Size When checked it scales the pic to full size
- and when not checked it draws the image pixel
- for pixel.
-
-
- Now for an example:
- Select 'Load Spectrum 512' under the File menu and locate the picture
- file with the file selector. You'll see what looks like a mess loaded
- to the screen and scanned line by line. After that's done select 'Redraw
- Picture' under the View menu. The Spectrum image will be transformed in
- TT low rez right before your very eyes. Press any key to exit the pic
- and select 'Save Prism-Paint' under the File menu. Save the pic to
- whatever drive you want with the file selector. Keep in mind that
- the converted file will be about 160K in size.
-
- Select 'Full Size' under the Options menu to change the size of the
- converted pic. Select 'Redraw Picture' under the View menu to make
- the change.
-
- After you've selected 'Redraw Picture' you can use 'Show Picture' to
- review the image instantly. This is the image that will be saved to disk.
-
-
- Notes:
- The way averaging works is like this. If the pic has over 256 colors
- then the program totals up all the colors used per pixel and finds the
- least used color. It then matches it to the closest possible color that's
- already in the pics palette. This continues until the pic has exactly
- 256 colors. Averaging isn't very fast, but it averages pretty good.
-
- When conveting the pics to TT low rez the program tries to insure
- that when it's loaded into Prism-Paint the background color won't be the
- same as the text color used by Prism-Paint's menus. If the pic has less
- than 256 colors the background will be set to black and the text color
- will be set to white. If the pic has more than 256 colors then the
- darkest color will be used for the background and the lightest color
- will be used for the text.
-
- If an error is detected all open files will be closed, and you will be
- alerted and the program will try to recover.
-
-
- About the program
- -----------------
-
- This program was written with GFA Basic 3.6TTe on an Atari TT030,
- 4meg ST RAM, TOS 3.06, and a PTC1426 color monitor. I can't say for sure
- if it will run on lesser or newer machines. Since I wrote the program
- without any docs on the GFA Raytrace file format or the Prism-Paint file
- format it's possible I over looked something important. If anyone has any
- scrap of info on these file formats I would like to see it. Future
- version might read compressed GFA Raytrace files and perphaps write GIF
- files or other formats that can also retain all 256 colors. Please
- contact me if you have an docs on GIF, GFA Raytrace, or Prism-Paint
- that you would like to share.
-
-
- Acknowledgments
- ---------------
-
- Atari, ST, Mega ST, STE, and TT030 are trademarks of Atari Corp.
- GEM, GEM Desktop, and DRI are trademarks of Digial Reasearch Inc.
- GFA and GFA Basic are trademarks of GFA Systemtechnik
- GFA Raytrace is (C)1989 by GFA Data Media Ltd.
- Spectrum 512 is (C)1987 by Trio Engineering, Inc.
- Prism-Paint is (C)1991 by Lexicor Software
- All other items are copyrighted/trademarked by their respective owners
-
-
- Disclaimer
- **********
-
- This document and all versions of ST to TT Picture Converter are
- Copyright 1992 by Lonny L. Pursell and ENCOM
- All Rights Reserved.
-
- ST to TT Picture Converter may not be sold. It may, however, be freely
- distributed as long as this document is included and neither program nor
- document are modified in any way whatsoever. This document may not be
- reprinted without prior permission from the author.
-
- While every effort has been made to ensure that this program is free of
- bugs, I claim no responsiblity for any damage or loss of data resulting
- from the use or misuse of ST to TT Picture Converter.
-
-
- Revision history
- ----------------
-
- v1.00 first release
- v1.10 added GFA Raytrace compressed SCL file support
-