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)