bitmap_mask_color man page on DragonFly

bitmap_mask_color man page on DragonFly

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bitmap_mask_color(3)		Allegro manual		  bitmap_mask_color(3)

NAME
       bitmap_mask_color  -  Returns  the  mask color of the specified bitmap.
       Allegro game programming library.

SYNOPSIS
       #include <allegro.h>

       int bitmap_mask_color(BITMAP *bmp);

DESCRIPTION
       Returns the mask color for the specified bitmap	(the  value  which  is
       skipped	when drawing sprites). For 256-color bitmaps this is zero, and
       for truecolor bitmaps it is bright pink (maximum	 red  and  blue,  zero
       green).	A  frequent use of this function is to clear a bitmap with the
       mask color so you can later  use	 this  bitmap  with  masked_blit()  or
       draw_sprite() after drawing other stuff on it. Example:

	  /* Replace mask color with another color. */
	  for (y = 0; y h; y++)
	     for (x = 0; x w; x++)
		if (getpixel(bmp, x, y) == bitmap_mask_color(bmp))
		   putpixel(bmp, x, y, another_color);

SEE ALSO
       MASK_COLOR_8(3),	 set_color_depth(3),  bitmap_color_depth(3),  ex3d(3),
       exmouse(3), expat(3)

Allegro				 version 4.4.2		  bitmap_mask_color(3)

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