Install allegro4-doc by entering the following commands in the terminal:
sudo apt update sudo apt install allegro4-doc
documentation for the Allegro library
This package contains the Allegro documentation in various formats, FAQs and other documentation about the Allegro library and the source of the example programs. . Allegro is a cross-platform library mainly aimed at video game and multimedia programming. It handles common, low-level tasks such as creating windows, accepting user input, loading data, drawing images, playing sounds, etc. and generally abstracting away the underlying platform.