gifbg - A program to generate a single-color test pattern GIF with
gradually changing intensity in any of the basic 8 directions.
gifbg [-q] [-d Dir] [-l #Lvls] [-c R G B] [-m MinI] [-M MaxI] [-s W H]
The gifbg program reads no input, and will dump the created GIF file to
Quiet mode. Defaults off on MSDOS, on under UNIX. Controls
printout of running scan lines. Use -q- to invert.
Select direction the intensity of the background should
increase. Direction can be one of the 8 principal directions:
T - for Top "TR" - for Top Right "R" - for
Right "BR" - for Bottom Right "B" - for
Bottom "BL" - for Bottom Left "L" - for left "TL" -
for Top Left
The compass directions may be use as synonyms for the above
directions, so for example "NE" is equal to "TR".
Direction is case insensitive. The default direction is Top
Number of levels the color will be scaled to. Default is 16.
[-c R G B]
What to use as the primary background color to scale. This
color is scaled between the minimum intensity (MinI) and maximum
intensity (MaxI) from one end of the screen to the other as
defined by Dir. See below (-m & -M) for MinI & MaxI. Default is
Blue (0, 0, 255).
Minimum intensity (in percent) to scale color. Default 10%
Maximum intensity (in percent) to scale color. Default 100%
[-s W H]
Size of image to create. Default 640 by 350.
Print one line of command line help, similar to Usage above.
If MinI == MaxI = 100 (%) and #Lvls == 2 then boolean mask image of
specified size will be created - all foreground. This can be used as a
square mask for the <a href="gifcomb.html">
Man page created by T.Gridel <email@example.com>, originally written by
Eric S. Raymond <firstname.lastname@example.org>