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The Direct Rendering Infrastructure -LRB- DRI -RRB- is a framework for allowing direct access to graphics hardware under the X Window System in a safe , efficient way .. X Window System. X Window System. The main use of DRI is to provide hardware acceleration for the Mesa implementation of OpenGL .. Mesa. Mesa ( computer graphics ). OpenGL. OpenGL. DRI has also been adapted to provide OpenGL acceleration on a framebuffer console without a display server running .. OpenGL. OpenGL. framebuffer console. Linux framebuffer. display server. display server. DRI implementation is scattered through the X Server and its associated client libraries , Mesa 3D and the Direct Rendering Manager kernel subsystem .. Mesa. Mesa ( computer graphics ). X Server. X.Org Server. Mesa 3D. Mesa 3D. Direct Rendering Manager. Direct Rendering Manager. All of its source code is free software .. source code. source code. free software. free software