ggiDrawPixel, ggiPutPixel, ggiGetPixel - Draw, put, and get a single pixel from a visual
SYNOPSIS
#include <ggi/ggi.h>
int ggiDrawPixel(ggi_visual_t vis, int x, int y);
int ggiPutPixel(ggi_visual_t vis, int x, int y, ggi_pixel pixel);
int ggiGetPixel(ggi_visual_t vis, int x, int y, ggi_pixel *pixel);