PIXBACKGND(1)

NAME
pixbackgnd - generate a pix(5) shaded background

SYNOPSIS
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

DESCRIPTION
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 (ie, 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.

EXAMPLES
pixbackgnd 160 200 | pixmerge fg.pix — | pix-fb
pixbackgnd -t120 160 250
pixbackgnd -i -t0 160 200 | cat-fb -O file.troff

SEE ALSO
brlcad(1), fbcolor(1), pix-fb(1), pixmerge(1), cat-fb(1).

BUGS
The starting and ending intensities should probably be an option.

BUG REPORTS
Reports of bugs or problems should be submitted via electronic mail to <devs@brlcad.org>.