debian man page for polytype_ptex_mask

POLYTYPE_ATEX_MASK(3alleg4)					  Allegro manual				       POLYTYPE_ATEX_MASK(3alleg4)

NAME
       POLYTYPE_ATEX_MASK, POLYTYPE_PTEX_MASK - Polygon rendering mode type Allegro game programming library.

SYNOPSIS
       #include <allegro.h>

       #define POLYTYPE_ATEX_MASK

       #define POLYTYPE_PTEX_MASK

DESCRIPTION
       Like POLYTYPE_ATEX and POLYTYPE_PTEX, but zero texture map pixels are skipped, allowing parts of the texture map to be transparent.

SEE ALSO
       polygon3d(3alleg4), POLYTYPE_ATEX(3alleg4), POLYTYPE_PTEX(3alleg4), ex3d(3alleg4)

Allegro 							   version 4.4.2				       POLYTYPE_ATEX_MASK(3alleg4)