man RGB_MAP (3): Stores an rgb map to accelerate conversions. Allegro game programming library.

RGB_MAP(3) Stores an rgb map to accelerate conversions. Allegro game programming library.

SYNOPSIS

#include <allegro.h>

typedef struct RGB_MAP

   unsigned char data[32][32][32];

Read chapter "Converting between color formats" for a description on how to obtain/use this structure.