debian man page for _getpixel24

_getpixel(3alleg4)						  Allegro manual						_getpixel(3alleg4)

NAME
       _getpixel, _getpixel15, _getpixel16, _getpixel24, _getpixel32 - Faster specific version of getpixel(). Allegro game programming library.

SYNOPSIS
       #include <allegro.h>

       int _getpixel(BITMAP *bmp, int x, int y);

       int _getpixel15(BITMAP *bmp, int x, int y);

       int _getpixel16(BITMAP *bmp, int x, int y);

       int _getpixel24(BITMAP *bmp, int x, int y);

       int _getpixel32(BITMAP *bmp, int x, int y);

DESCRIPTION
       Faster  inline  versions  of  getpixel() for specific color depths. These won't work in mode-X, and don't do any clipping, so you must make
       sure the point lies inside the bitmap.

RETURN VALUE
       Returns the value of the pixel in the color format you specified.

SEE ALSO
       getpixel(3alleg4)

Allegro 							   version 4.4.2						_getpixel(3alleg4)