NAME

       excolmap - Creating graphical effects with color mapping tables. Allegro 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
       example, a greyscale color table is set. The result is that a simple rectfill call, instead of drawing  a
       rectangle  with  color  zero,  uses the already drawn pixels to determine the pixel to be drawn (read the
       comment of return_grey_color() for a precise description of the algorithm). 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(3alleg4),    COLOR_MAP(3alleg4),     END_OF_MAIN(3alleg4),     PALETTE(3alleg4),     RGB(3alleg4),
       RGB_MAP(3alleg4),  SCREEN_H(3alleg4),  SCREEN_W(3alleg4),  allegro_error(3alleg4), allegro_init(3alleg4),
       allegro_message(3alleg4), blit(3alleg4), circlefill(3alleg4), clear_keybuf(3alleg4),  color_map(3alleg4),
       create_bitmap(3alleg4),  create_color_table(3alleg4), create_rgb_table(3alleg4), destroy_bitmap(3alleg4),
       drawing_mode(3alleg4),    font(3alleg4),    generate_332_palette(3alleg4),     install_keyboard(3alleg4),
       keypressed(3alleg4),     makecol(3alleg4),     rectfill(3alleg4),     rest(3alleg4),    rgb_map(3alleg4),
       screen(3alleg4), set_gfx_mode(3alleg4), set_palette(3alleg4), textout_centre_ex(3alleg4), vsync(3alleg4)

Allegro                                           version 4.4.3                                excolmap(3alleg4)