PhysicsFS integration
PhysicsFS is a library to provide abstract access to various archives. See http://icculus.org/physfs/ for more information.
This addon makes it possible to read and write files (on disk or inside archives) using PhysicsFS, through Allegro's file I/O API. For example, that means you can use the Image I/O addon to load images from .zip files.
You must set up PhysicsFS through its own API. When you want to open an ALLEGRO_FILE using PhysicsFS, first call al_set_physfs_file_interface, then al_fopen or another function that calls al_fopen.
These functions are declared in the following header file. Link with allegro_physfs.
#include <allegro5/allegro_physfs.h>