man set_palette () - Sets the entire palette of 256 colors. Allegro game programming library.
NAME
set_palette - Sets the entire palette of 256 colors. Allegro game programming library.
SYNOPSIS
#include <allegro.h>
void set_palette(const PALETTE p);
DESCRIPTION
Sets the entire palette of 256 colors. You should provide an array of 256 RGB structures. Unlike set_color(), there is no need to call vsync() before this function. Example:
BITMAP *bmp;
PALETTE palette;
...
bmp = load_bitmap(filename, palette);
if (!bmp)
abort_on_error("Couldn't load bitmap!");
set_palette(palette);