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. The values of hue and saturation range from 0 to 255 inclusive and can be selected via fbcolor(1). A hue of 160 is a pleasing blue.
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 (these values are used above).
-w and -n options set the width and height, respectively;
-s sets them to the same value.
By default, the display is assumed to be 512x512 pixels;
specifying the
-H
flag, in addition to changing the title height to 90 scanlines (see below), changes the output size to 1024x1024.
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.
If the
-i
flag is specified, the scanlines will be written out in inverted order
(i.e., top to bottom).
pixbackgnd 160 200 | pixmerge fg.pix - | pix-fb
pixbackgnd -t120 160 250
pixbackgnd -i -t0 160 200 | pix-fb