rgb_map(3) Allegro manual rgb_map(3)NAMErgb_map - Look up table to speed up reducing RGB values to palette col‐
ors. Allegro game programming library.
SYNOPSIS
#include <allegro.h>
extern RGB_MAP *rgb_map;
DESCRIPTION
To speed up reducing RGB values to 8-bit paletted colors, Allegro uses
a 32k lookup table (5 bits for each color component). You must set up
this table before using the gouraud shading routines, and if present
the table will also vastly accelerate the makecol8() and some cre‐
ate_*_table() functions. RGB tables can be precalculated with the
rgbmap utility, or generated at runtime with create_rgb_table().
SEE ALSOcreate_rgb_table(3), makecol8(3), create_trans_table(3), cre‐
ate_light_table(3), create_color_table(3), ex3d(3), excolmap(3),
exrgbhsv(3), exshade(3), extrans(3)Allegro version 4.4.2 rgb_map(3)