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XTESTPICTURE(1)		    General Commands Manual	       XTESTPICTURE(1)

NAME
       xtestpicture - draw a simple monitor test pattern

SYNOPSIS
       xtestpicture [-s[aturated]] [-d[isplay] display]	[-v[ersion]]

DESCRIPTION
       This  program  creates  a  single window	covering the whole screen, and
       draws several test patterns in it. The window is	configured to  be  not
       intercepted  by	a  window  manager and raised to the top of the	window
       stack, so it should be the only picture on the screen at	all.

       A couple	of lines between the opposite corners, two rectangles near the
       border of the screen, a single rectangle, and a circle in the middle of
       the screen are mainly useful for	convergency and	 linearity  considera-
       tions.

       A  box with alternating black and white vertical	lines above the	center
       of the screen, two pixels thick on the left side	and  one  pixel	 thick
       each  on	the right side is intented to evaluate the sharpness and band-
       width of	the monitor.

       Finally,	there's	a box containing a palette of eight colors. These  are
       the basic CRT colors red, green,	and blue, along	with their mutual mix-
       ture  colors  magenta,  cyan, yellow, and white,	accompanied by a black
       rectangle to complete the series. The colors are	fully saturated	in the
       top row,	i. e. with 100 % intensity  and	 not  intermixed  with	white,
       while the saturation decreases in steps of 25 % towards the bottom row,
       which is	plain gray scale (0 % saturation).

       Since  this color palette causes	a total	cost of	32 color cells,	it can
       be avoided by starting xtestpicture with	the option -s[aturated].  This
       will cause the program to display only fully saturated colors.

       The program will	exit if	any pointer button is pressed.

       Specifying the option -v[ersion]	will cause the program	to  print  its
       version identification to stderr	and exit.

AUTHOR
       Joerg Wunsch, Dresden <joerg_wunsch@uriah.heep.sax.de>

X Version 11			  Contributed		       XTESTPICTURE(1)

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<https://man.freebsd.org/cgi/man.cgi?query=xtestpicture&sektion=1&manpath=FreeBSD+Ports+14.3.quarterly>

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