pixbackgnd — generate a pix(5) shaded background
pixbackgnd
[-h ] [-i ] [-s squaresize
] [-w width
] [-n height
] [-t title_height
] [-a top_inten
] [-b bottom_inten
] hue
saturation
>
file.pix
pixbackgnd
[-h ] [-i ] [-s squaresize
] [-w width
] [-n height
] [-t title_height
] red
green
blue
>
file.pix
Pixbackgnd generates a pix(5) format shaded background on stdout suitable for making slides for a presentation on. The upper portion of the screen is reserved for a title area, and is drawn at constant intensity 240, followed by a 4 scanline white bar, after which the intensity smoothly decreases from 240 to 50. Hue and saturation are values from 0 to 255 and can be selected via fbcolor(1). A hue of 160 is a pleasing blue.
By default, the title height is
80 scanlines, or 90 scanlines if the
-h
flag is set, but the
-t
title_height
option may be used to specify another value.
If
title_height
is set to zero, then the white bar
is omitted as well, and the entire display is smoothly shaded.
By default, the display is assumed to be 512x512 pixels;
by specifying the
-h
flag, the output size is changed to 1024x1024.
By specifying the
-i
flag, the scanlines will be written out in inverted order
(i.e., top to bottom).
This is mostly useful with programs like
cat-fb(1)
The
-a
and
-b
options can be used to set the top and bottom intensity,
in the range of 0 to 255.
By default, the top intensity is 240, and the bottom is 50.
pixbackgnd 160 200 | pixmerge fg.pix - | pix-fb pixbackgnd -t120 160 250 pixbackgnd -i -t0 160 200 | cat-fb -O file.troff