void gl_setpixel(int x, int y, int c),
void gl_setpixelrgb(int x, int y, int r, int g, int b);
gl_setpixelrgb draws a single pixel at position (x, y) with color components r, g, and b, ranging from 0 to 255. In 256 color mode, only meaningful if the RGB palette is set (gl_setrgbpalette(3)).
svgalib(7), vgagl(7), svgalib.conf(5), threedkit(7), testgl(1), gl_circle(3), gl_fillbox(3), gl_hline(3), gl_line(3), gl_rgbcolor(3), gl_setrgbpalette(3).
This manual page was edited by Michael Weller <firstname.lastname@example.org>. The exact source of the referenced demo as well as of the original documentation is unknown.
It is very likely that both are at least to some extent are due to Harm Hanemaayer <H.Hanemaayer@inter.nl.net>.
Occasionally this might be wrong. I hereby asked to be excused by the original author and will happily accept any additions or corrections to this first version of the svgalib manual.