excolmap(3alleg4) [opendarwin man page]

excolmap(3alleg4)						  Allegro manual						 excolmap(3alleg4)

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_key-
       buf(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),    rgb_map(3alleg4),	  screen(3alleg4),    set_gfx_mode(3alleg4),   set_palette(3alleg4),   textout_centre_ex(3alleg4),
       vsync(3alleg4)

Allegro 							   version 4.4.2						 excolmap(3alleg4)

extrans(3alleg4)						  Allegro manual						  extrans(3alleg4)

NAME

       extrans - Lighting and translucency effects. Allegro game programming library.

SYNOPSIS

       #include <allegro.h>

       Example extrans

DESCRIPTION

       This program demonstrates how to use the lighting and translucency functions. The first part of the example will show a dark screen illumi-
       nated by a spotlight you can move with your mouse. After a key press the example shows the full bitmap and the spotlight changes  to  be  a
       reduced version of the background with 50% of translucency.

       The  translucency  effect is easy to do in all color depths.  However, the lighting effect has to be performed in a different way depending
       on whether the screen is in 8bit mode or another color depth. This is because additive drawing mode uses a different set  of  routines  for
       truecolor modes.

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),  bitmap_color_depth(3alleg4),  blit(3alleg4),
       circlefill(3alleg4),  clear_bitmap(3alleg4),  clear_keybuf(3alleg4), color_map(3alleg4), create_bitmap(3alleg4), create_bitmap_ex(3alleg4),
       create_light_table(3alleg4), create_rgb_table(3alleg4), create_trans_table(3alleg4),  destroy_bitmap(3alleg4),  draw_trans_sprite(3alleg4),
       drawing_mode(3alleg4),	 install_keyboard(3alleg4),   install_mouse(3alleg4),	install_timer(3alleg4),   keypressed(3alleg4),	 load_bit-
       map(3alleg4),  mouse_x(3alleg4),  mouse_y(3alleg4),  poll_mouse(3alleg4),  rectfill(3alleg4),   replace_filename(3alleg4),   rest(3alleg4),
       rgb_map(3alleg4),  screen(3alleg4),  set_alpha_blender(3alleg4),  set_gfx_mode(3alleg4),  set_palette(3alleg4), set_trans_blender(3alleg4),
       set_write_alpha_blender(3alleg4), stretch_blit(3alleg4)

Allegro 							   version 4.4.2						  extrans(3alleg4)