Install allegro5-doc by entering the following commands in the terminal:
sudo apt update sudo apt install allegro5-doc
documentation for the Allegro 5 library
This package contains the Allegro documentation in various formats, FAQs and other documentation about the Allegro library, source of the example programs. . Allegro is a cross-platform library intended for use in computer games and other types of multimedia programming. Allegro 5 is the latest major revision of the library, designed to take advantage of modern hardware (e.g. hardware acceleration using 3D cards) and operating systems. Although it is not backwards compatible with earlier versions, it still occupies the same niche and retains a familiar style.