excolmap man page on DragonFly
[printable version]
excolmap(3) Allegro manual excolmap(3)
NAME
excolmap - Creating graphical effects with color mapping tables. Alle‐
gro game programming library.
SYNOPSIS
#include <allegro.h>
Example excolmap
DESCRIPTION
This program demonstrates how to create custom graphic effects with the
create_color_table function. Allegro drawing routines are affected by
any color table you might have set up. In the first part of this exam‐
ple, a greyscale color table is set. The result is that a simple rect‐
fill call, instead of drawing a rectangle with color zero, uses the
already drawn pixels to determine the pixel to be drawn (read the com‐
ment of return_grey_color() for a precise description of the algo‐
rithm). In the second part of the test, the color table is changed to
be an inverse table, meaning that any pixel drawn will be shown as its
color values had been inverted.
SEE ALSO
BITMAP(3), COLOR_MAP(3), END_OF_MAIN(3), PALETTE(3), RGB(3),
RGB_MAP(3), SCREEN_H(3), SCREEN_W(3), allegro_error(3), alle‐
gro_init(3), allegro_message(3), blit(3), circlefill(3), clear_key‐
buf(3), color_map(3), create_bitmap(3), create_color_table(3), cre‐
ate_rgb_table(3), destroy_bitmap(3), drawing_mode(3), font(3), gener‐
ate_332_palette(3), install_keyboard(3), keypressed(3), makecol(3),
rectfill(3), rgb_map(3), screen(3), set_gfx_mode(3), set_palette(3),
textout_centre_ex(3), vsync(3)
Allegro version 4.4.2 excolmap(3)
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