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-accelerated 3D rendering in Mesa 3D. Once 3D graphics cards became mainstream on PC hardware, companies began working on adding support for hardware-accelerated 3D rendering to Mesa 3D. The library was one of the first drivers to support hardware-acceleration via the 3dfx Glide API driver for the very popular Voodoo I/II graphics cards and others as well. All rendering was done indirectly in the X server, leaving some overhead and speed lagging behind the theoretical maximum. The Direct Rendering Infrastructure (DRI) finally succeeded in providing an interface for direct 3D rendering by the OpenGL applications and was officially added to Mesa 3D.
In its current form, Mesa 3D is available and can be compiled on virtually all modern platforms.
Though not an official OpenGL implementation for licensing reasons, the Mesa 3D authors have worked to keep the API in line with the most current OpenGL standards and conformance tests, as set forth by the OpenGL Architecture Review Board.
Whilst Mesa 3D supports several hardware graphics accelerators, it may also be compiled as a software-only renderer. Since it is also free/open source software, it is possible to use it to study the internal workings of an OpenGL-compatible renderer.
It is sometimes possible to find subtle bugs in OpenGL applications by linking against Mesa 3D and using a conventional debugger to track problems into the lower level library.
Already (at least partially) 3D acceleration managed cards : ATI Mach 64 and r100 to r600 chipsets, Intel chipsets, IBM/Toshiba/Sony Cell chip (in Gallium3D architecture) used in Sony PlayStation 3, limited Nvidia support, S3 Virge & Savage chipsets, VIA chipsets, Matrox G200 & G400, SiliconMotion and more...[5].
