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Direct and Rendering
The Direct Rendering Infrastructure ( DRI ), which aims to provide a reliable kernel-level interface to the framebuffer, may make these efforts redundant.
For sufficiently capable combinations of hardware and operating systems, X. Org plans to access the video hardware only via the Direct Rendering Infrastructure ( DRI ), using the 3D hardware.
DirectFBGL is an OpenGL extension for DirectFB / XDirectFB that uses Direct Rendering Infrastructure ( DRI ) in the Mesa 3D library to support OpenGL hardware acceleration.
In computing, the Direct Rendering Infrastructure ( DRI ) is an interface and a free software implementation used in the X Window System to securely allow user applications to access the video hardware without requiring data to be passed through the X server.
* The Direct Rendering Manager ( DRM ) is a combination of at least two kernel modules, one of core DRM code and others providing APIs to userland to access different classes of video hardware.
* A Multipipe Direct Rendering Architecture for 3D ( Jens Owen and Kevin Martin, 1998 ) ( original DRI design document )
* Direct Rendering Infrastructure, Low-Level Design Document ( Kevin E. Martin, Rickard E. Faith, Jens Owen, and Allen Akin, 1999 )
* DRI Extension for supporting Direct Rendering Protocol Specification ( Jens Owen and Kevin Martin, Precision Insight, 1999 )
Recent technologies such as DirectFB, Direct Rendering Infrastructure, and hardware compositing via OpenGL allow X client applications to utilize true alpha transparency.
The 3D acceleration set was provided via the Direct Rendering Manager, which worked by mapping 3D rendered pictures on top of the 2D picture.
Direct and Infrastructure
The Direct Rendering Manager ( DRM ) is a component of the Direct Rendering Infrastructure, a system to provide efficient video acceleration ( especially 3D rendering ) on Unix-like operating systems, e. g. Linux, FreeBSD, NetBSD, and OpenBSD.
The Direct Rendering Infrastructure ( DRI ) was one of these approaches to interface Mesa, OpenGL and other 3D rendering API libraries with the device drivers and hardware.
Utah GLX was a project aimed at creating a fully open source basic hardware-accelerated 3D rendering for XFree86 and OpenGL before the introduction of the Direct Rendering Infrastructure in XFree86 version 4. 0, which is what is used today.
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