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create_color_table(3)		Allegro	manual		 create_color_table(3)

NAME
       create_color_table  -  Fills  a	color mapping table for	customised ef-
       fects. Allegro game programming library.

SYNOPSIS
       #include	<allegro.h>

       void  create_color_table(COLOR_MAP  *table,  const  PALETTE  pal,  void
       (*blend)(PALETTE	 pal,  int  x,	int y, RGB *rgb), void (*callback)(int
       pos));

DESCRIPTION
       Fills the specified color mapping table with lookup data	for doing cus-
       tomised	effects	with the specified palette, calling the	blend function
       to determine the	results	of each	color combination.

       Your blend routine will be passed a pointer to the palette and the  two
       indices	of the colors which are	to be combined,	and should fill	in the
       RGB structure with the desired result in	0-63 format. Allegro will then
       search  the palette for the closest match to the	RGB color that you re-
       quested,	so it doesn't matter if	the palette has	 no  exact  match  for
       this color.

       If  the callback	function is not	NULL, it will be called	256 times dur-
       ing the calculation, allowing you to display a progress indicator.  Ex-
       ample:

	  COLOR_MAP greyscale_table;
	  ...
	  void return_grey_color(const PALETTE pal,
				 int x,	int y, RGB *rgb)
	  {
	     ...
	  }
	  ...
	     /*	Build a	color lookup table for greyscale effect. */
	     create_color_table(&greyscale_table, pal,
				return_grey_color, NULL);

SEE ALSO
       color_map(3),	create_light_table(3),	 create_trans_table(3),	  cre-
       ate_blender_table(3),	 draw_trans_sprite(3),	   draw_lit_sprite(3),
       draw_gouraud_sprite(3), rgb_map(3), excolmap(3)

Allegro				 version 4.4.2		 create_color_table(3)

NAME | SYNOPSIS | DESCRIPTION | SEE ALSO

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