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Allegro (software library)
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== History == Initially standing for ''Atari Low-Level Game Routines'',<ref>[http://www.allegro.cc/forums/thread/573313/574083#target Forum posting by Shawn Hargreaves]</ref> Allegro was originally created by {{ill|Shawn Hargreaves|pl}} for the [[Atari ST]] in the early 1990s. When Hargreaves realized the platform was dying, he abandoned the Atari version, and reimplemented his work for the [[Borland C++]] and [[DJGPP]] [[compiler]]s in 1995. Support for Borland C++ was dropped in version 2.0, and DJGPP was the only supported compiler. As DJGPP was an [[MS-DOS]] compiler, all games which used Allegro therefore used DOS, attracting the enthusiast scene for that legacy system.<ref>{{cite web|url=https://www.gamingonlinux.com/2024/04/building-a-retro-linux-gaming-computer-part-41-the-worm-turns/|title=Building a Retro Linux Gaming Computer Part 41: The Worm Turns|website=GamingOnLinux|first=Hamish|last=Wilson|date=2024-04-09|access-date=2024-04-13|quote=''Although the project does see continued support to this day with the Allegro 5 branch, for much of its history Allegro was very much associated with the MS-DOS freeware scene that was still going strong well into the early 2000s.''}}</ref> Around 1998, Allegro branched out into several versions. A port to [[Microsoft Windows|Windows]], WinAllegro, was created, and also during this time, a [[Unix]] port of Allegro, XwinAllegro, was created. These various ports were brought together during the Allegro 3.9 WIP versions, with Allegro 4.0 being the first stable version of Allegro to support multiple platforms. === Allegro 5 === Current development is focused on the Allegro 5 branch, a complete redesign of both the API and much of the library's internal operation. Effort was made to make the API more consistent and [[Thread_(computing)#Single-threaded_vs_multithreaded_programs|multi-thread]] safe. By default, the library is now [[hardware acceleration|hardware-accelerated]] using [[OpenGL]] or [[DirectX]] rendering backends where appropriate. Many of the addons that existed as separate projects for Allegro 4 now interface seamlessly with Allegro proper and are bundled with the default installation. Allegro 5 is [[event-driven programming|event driven]].
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