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testgl(6)                     Svgalib User Manual                    testgl(6)

       testgl - test the vgagl library


       Demo program for vgagl(7) framebuffer library. Runs in any mode preset from the environment.

       First draws pixels in random locations, then random boxes, then random lines and finally some bit image in ran-
       dom locations (all just over the previous drawings).

       Then the test is repeated clipping the screen output to a smaller screen portion (using a  vgagl(7)  function).
       Finally  a  (lousy)  'rotating'  linux  logo is shown in the top left quadrant and then is drawn over the whole
       screen.  Depending on internal development state of svgalib, it may use an accelerator for some  of  the  func-

       You  can set a videomode to use by setting the environment variable SVGALIB_DEFAULT_MODE to a number (see vgat-
       est for a list) or a string like G0x1x2 where you replace 0 with desired x resolution, 1  with  the  desired  y
       rez, and 2 with the desired number of colors (2, 16, 256, 32K, 64K, 16M, 16M4). Again, only certain choices are
       available, see vgatest for a list.

       In case nothing is selected, G320x200x256 is choosen.

       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 distribution 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   at   /pub/Linux/libs/graphics   and   at
       /pub/linux/sources/libs which will most probably be mirrored by a site close to you.

       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),  testlinear(6),  vgatest(6),
       plane(6), wrapdemo(6)

       This manual page was edited by Michael Weller <>. The exact source  of  the  refer-
       enced 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 <>.

       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.

Svgalib 1.3.0                    8 April 1998                        testgl(6)