testlinear(6)
NAME
testlinear, lineart - test a linear frame buffer
SYNOPSIS
testlinear
DESCRIPTION
Program to test linear addressing on Cirrus cards and on
Mach32 (and other cards which may support it).
Selects 640x480x256 and tries to enable a linear frame
buffer (its virtual address is printed). Fills the screen
in some color, then draws pixels in random positions.
For Cirrus cards some direct hardware access is then made
for highspeed screen access. Except for the last (Cirrus
only) test no speeds are printed, but you are welcome to
use 'time' to measure it. The program draws 714400 one
byte pixels plus a forced 1s delay and various rand()
calls for the pixels.
The testlinear demo needs a few presses of <Return> after
each minimal demo step. Even when it does not prompt for
it. When it appears to be stuck, just press <Return>.
The lineart demo is the same, but it accepts a command
line with an arbitrary number of modes. The modes may be
either mode numbers or names, or both. For example,
lineart 11 17 G800x600x32k 22
will give a display of mode 11. If a key is pressed mode
17 will appear, followed by mode 20 and 22 as succesive
keys are pressed.
This demo is part of svgalib and can be found in the
demos/ subdirectory of the original svgalib distribution.
However, it is not installed in the system by default,
s.t. it is unclear where you can find it if your svgalib
was installed by some linux distribution. Even then, when
you have the demo on your system, you probably won't have
the sources s.t. it is only of limited use for you.
In case of any such problem, simply get an svgalib distri
bution from the net. You even don't need to install it.
Just make in the demos/ subdirecty. As of this writing,
svgalib-1.2.12.tar.gz is the latest version and can be
retrieved by ftp from sunsite.unc.edu at
/pub/Linux/libs/graphics and tsx-11.mit.edu at
/pub/linux/sources/libs which will most probably be mir
rored by a site close to you.
SEE ALSO
svgalib(7), vgagl(7), libvga.config(5), threed(6),
accel(6), bg_test(6), eventtest(6), forktest(6), fun(6),
keytest(6), mousetest(6), scrolltest(6), speedtest(6),
spin(6), testaccel(6), testgl(6), vgatest(6), plane(6),
wrapdemo(6)
AUTHOR
This manual page was edited by Michael Weller <eowmob@expmath.uni-essen.de>. The exact source of the referenced
demo as well as of the original documentation is unknown.
It is very likely that both are at least to some extent
are due to Harm Hanemaayer <H.Hanemaayer@inter.nl.net>.
- Occasionally this might be wrong. I hereby asked to be
excused by the original author and will happily accept any
additions or corrections to this first version of the
svgalib manual.