Scroll to navigation
| rgb_map(3alleg4) |
Allegro manual |
rgb_map(3alleg4) |
NAME¶
rgb_map - Look up table to speed up reducing RGB values to palette colors.
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 create_*_table() functions. RGB
tables can be precalculated with the rgbmap utility, or generated at runtime
with create_rgb_table().
SEE ALSO¶
create_rgb_table(3alleg4), makecol8(3alleg4),
create_trans_table(3alleg4), create_light_table(3alleg4),
create_color_table(3alleg4), ex3d(3alleg4),
excolmap(3alleg4), exrgbhsv(3alleg4), exshade(3alleg4),
extrans(3alleg4)
