.\" Generated by the Allegro makedoc utility
.TH bitmap_mask_color 3alleg4 "version 4.4.3" "Allegro" "Allegro manual"
.SH NAME
bitmap_mask_color \- Returns the mask color of the specified bitmap. Allegro game programming library.\&
.SH SYNOPSIS
.B #include <allegro.h>

.sp
.B int bitmap_mask_color(BITMAP *bmp);
.SH 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:

.nf
   /* 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);
.fi

.SH SEE ALSO
.BR MASK_COLOR_8 (3alleg4),
.BR set_color_depth (3alleg4),
.BR bitmap_color_depth (3alleg4),
.BR ex3d (3alleg4),
.BR exmouse (3alleg4),
.BR expat (3alleg4)