Provided by: allegro4-doc_4.4.2-13_all bug

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(3alleg4),       set_color_depth(3alleg4),        bitmap_color_depth(3alleg4),
       ex3d(3alleg4), exmouse(3alleg4), expat(3alleg4)