ggi-monitest man page on Cygwin

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monitest(1)			      GGI			   monitest(1)

NAME
       monitest : Monitor test program

SYNOPSIS
       monitest [modestring]

DESCRIPTION
       monitest	 is  intended to test ggi drivers (during development) and the
       optical quality of monitors (later). Don't be too disappointed  if  you
       find a weakness in your monitor, mine is probably worse than yours

       The  main feature is a test screen like broadcast in former days before
       24 hour TV programs. It is used to test geometry and resolution of  the
       monitor.

       Also  included are several test screens for testing moiree effects, the
       horizontal and vertical screen resolution, and colour convergence.

       You will be able to switch resolution on the fly, to find out  interac‐
       tively  what  modes  the	 driver	 supports  and	how  much of this your
       card/monitor can do with acceptable quality.

OPTIONS
       modestring
	      Specify the mode to use

PATTERN DESCRIPTIONS
   TESTPATTERN
       The basic grid is white on black and has sixteen times  twelve  fields.
       On  a  tube with 4:3 ratio each one should be square, even if the pixel
       size of the screen does not have 4:3 ratio. The	lines  are  one	 pixel
       wide.  They  should  be	straight,  even	 in  the corners, and not have
       coloured borders.

       There is a big circle in the middle and smaller circles in each corner.
       They  are round pixelwise, so they should be circles if the screen size
       ratio (width:height of visible area) is equal to the  pixel  ratio.  It
       usually	should	be  4:3.  So  the  best sizes for testing are 320x240,
       640x480, 800x600 and up.

       In each corner there is one box with vertical stripes.  These  are  one
       pixel  wide,  with  one	pixel distance, so you get maximum signal fre‐
       quency and can see how well your monitor and video card handle the dot‐
       clock.

       The middle field has eight solid blocks with the eight colours, i.e all
       combinations of the red, green and blue	signals	 turned	 on  and  off.
       Below it there are four fields with vertical stripes as in the corners,
       but in white and the three basic colours red, green and blue. Below  it
       there  is  a  bar  with	these  four colours red, blue, green and white
       blending from full intensity (left) to  zero  intensity	(right),  i.e.
       black.

       In  the	middle the current resolution is printed. Maybe horizontal and
       vertical frequency will be printed too, if I can get  the  information,
       which is not (yet) implemented in the LibGGI API.

   CONVERGENCE
       Convergence means how well the red, green and blue picture are aligned.

       This  is tested by painting a grid of red, green and blue + signs. They
       should be aligned properly where they touch. Usually they don't...

       There are four patterns like this, rotating the colours. Press space to
       switch forward, or press q to quit anytime.

   RESOLUTION
       Once again there are several screens, press space to step thru them.

       Vertical	 white	stripes	 with width 1, 2, 3 and 4 pixels. See what the
       highest dotclock is the monitor can handle.

       Horizontal stripes with width 1 and 2 pixels. See  how  well  the  scan
       lines are separated.

       Three  stars  of	 black	lines on white, with a width and space (at the
       sceen borders) of 1 and 1, 1 and 5, 2 and 10  respectively.  Watch  for
       colour  changes,	 and once again you can see the maximum frequency your
       monitor can do.

       Vertical bars in red, blue, green and white, with the width of 4, 3, 2,
       1,  2, 3 and 4 pixels for bar and space. See whether there is a differ‐
       ence in resolution between the  colours.	 And  watch,  again,  for  the
       alignment.

   MOIREE
       I  don't	 know  whether	these tests work, my monitor is rather good in
       this respect. Please gimme some feedback!

       If there is interference between the monitor mask and a grid  displayed
       on  the monitor, a change of colours can be seen, and is sometimes very
       annoying. There are three tests present, each one  comes	 in  the  four
       colour  combinations  black,  red, green and blue on white background :
       vertical stripes, one dot wide, with  one  dot  space;  white  dots  on
       colour  ground,	spaced	two  and two (run testscreen with a really low
       resolution to see what I mean :-); a chessboard.

   FLAT PANEL TEST
       This test allows you to drag a coloured rectangle around,  looking  for
       pixels  that are always on or off, which is, as far as I know, the most
       common failure of flat panels.

       The rectange is moved using the mouse or the arrow keys.

       The color of the rectange can be changed by pressing the primary	 mouse
       button (usually the left one) or <Space>, cycling through (black,
       red, green, blue, white) or by pressing a number between 0 and 4 or the
       first letter of the colour (b is blue).

       Dragging with the second button pressed changes the size of the rectan‐
       gle. Every other key terminates this test.

BUGS AND LIMITATIONS
       ·   If you switch depth, the program might crash badly.	This  will  be
	   solved  once	 I  figure  out	 mode  checking or using a target that
	   (opposed to the X targets) supports that.

AUTHOR
       monitest was written by Hartmut Niemann.

libggi-2.2.x			  2003-04-02			   monitest(1)
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