# 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 (or 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. ## al_set_physfs_file_interface
    void al_set_physfs_file_interface(void)
After calling this, subsequent calls to al_fopen will be handled by PHYSFS_open(). Operations on the files returned by al_fopen will then be performed through PhysicsFS. To remember and restore another file I/O backend, you can use al_store_state/al_restore_state. See also: al_set_new_file_interface.

Last updated: 2009-05-04 10:18:46 UTC