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rgb_map(3)			Allegro	manual			    rgb_map(3)

NAME
       rgb_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 ALSO
       create_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)

NAME | SYNOPSIS | DESCRIPTION | SEE ALSO

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