Graphics.eu (19k) pre-alpha release
-- taken from Euphoria wrapper for SVGAlib
-- Author: Marcos Donnantuoni <dontima at yahoo.com>
-- and from graphics.e by Rob Craig
This library has been sent to Rob for posting on the Contributions page. It is
also available from my web site (http://sabal.8m.com) and clicking the Euphoria
button. If you have trouble retrieving the file from either site, please email
me privately (m_sabal at yahoo.com) and I would be happy to send it to you. The
library was tested using Slackware/LoopLinux and Svgalib 1.4.0. By replacing the
standard graphics.e with the new graphics.eu, you can still run all current Linux
programs without modification. In addition, you will be able to run many DOS32
graphical programs on Linux (including taking advantage of the many bitmapped
fonts available). This is a pre-alpha release for the following reasons (and if
anyone has any suggestions for help, please let me know!):
1) I've only been able to run it as root. There's gotta be an I/O permission
not set for other users, but I don't know where. Anybody have any ideas?
2) There are no built-in routines in svgalib for polygon or ellipse. I can
emulate unfilled polygons pretty easily, but filled polygons and ellipses are
beyond me right now. Not to mention the lack of speed that any emulations would
have. MMX is supported in svgalib, but I haven't gotten to the point of trying
to wrap them. I'm looking for *fast* algorithms for filled polygons and filled
ellipses using draw_line or pixel, unless a better answer is out there.
3) The pixel routine had to be overridden with an unoptimized for-loop. I'd
rather stay away from direct memory access in Linux graphics if possible due to
the multi-user nature of the beast.
4) I'm not touching image.e until graphics.e is working 100%.
5) If for some reason, your program errors while in graphics mode and your text
mode is acting messed up, try "reset cursor" or "restorepalette" at the bash
prompt. You may have to type blind, but one or the other of these should return
you to a normal text mode.
6) There is no number 6.
Sorry for the long post and let me know if there are any problems.
Michael J. Sabal
m_sabal at yahoo.com
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