1. Computers
  2. Display Drivers
  3. Graphics Cards
  4. Memory
  5. Motherboards
  6. Processors
  7. Software
  8. Storage
  9. Operating Systems


Facebook RSS Twitter Twitter Google Plus


Phoronix Test Suite

OpenBenchmarking.org

DRI2 Protocol Gets Updated, Again

X.Org

Published on 15 October 2008 08:13 AM EDT
Written by Michael Larabel in X.Org
8 Comments

Plans for version 2 of the Direct Rendering Infrastructure, or better known as DRI2, had come about last year at the 2007 X Developers' Summit. DRI2 allows for a number of technical improvements within X.Org graphics drivers, but for end-users it provides accelerated direct rendering to redirected windows. Today though much of DRI2 is now stabilized, but it didn't come without a lot of hard work and a few key revisions.

Kristian Høgsberg began merging his DRI2 code in February and then he merged the remaining bits in late March that provided the direct rendering support. However, then came Intel's Graphics Execution Manager.

The Graphics Execution Manager (or commonly known as GEM) is a kernel memory manager developed by Intel for their graphics driver and a complete replacement for Tungsten's TTM. Up to that point, TTM was set to become the de facto memory manager for use by open-source X.Org drivers. With that said, the initial design of DRI2 had required TTM's memory manager to be used. When Intel jumped ship on TTM it presented the need for DRI2 to be reworked. As a result of this, DRI2 support was dropped from the X Server 1.5 / X.Org 7.4 release.

Since then DRI2 has been reworked to accommodate GEM. Those bits had entered the different development trees in late August. At this year's X Developers' Summit (X Developers Raid The Zoo), a few more improvements were agreed to between Kristian and the other developers. Today this latest batch of improvements have been merged.

Prior to leaving on a holiday, Kristian committed the new DRI2 protocol and documentation along with updates to the X Server, Mesa, and Intel driver.

What's been added in this latest Direct Rendering Infrastructure 2 push is a DRI2CopyRegion request and the framework that allows DRI2 to be extended in future versions. With the CopyRegion request it's mostly a rename from SwapBuffers. No vsync handling or page-flipping support has yet been added to DRI2.

After today's commits, Kristian is now comfortable letting DRI2 be merged to master in Intel's X.Org driver. No other drivers, however, have yet to fully adopt this latest version. Intel users though will need to enable the DRI2 support through their xorg.conf. Kristian hopes to have most of the DRI2 work settled by next month. With X Server 1.6 being planned for a December release, the timing should be ideal. The announcement regarding today's DRI2 update can be read on the X.Org mailing list.

About The Author
Michael Larabel is the principal author of Phoronix.com and founded the web-site in 2004 with a focus on enriching the Linux hardware experience and being the largest web-site devoted to Linux hardware reviews, particularly for products relevant to Linux gamers and enthusiasts but also commonly reviewing servers/workstations and embedded Linux devices. Michael has written more than 10,000 articles covering the state of Linux hardware support, Linux performance, graphics hardware drivers, and other topics. Michael is also the lead developer of the Phoronix Test Suite, Phoromatic, and OpenBenchmarking.org automated testing software. He can be followed via and or contacted via .
Latest Linux Hardware Reviews
  1. Even With Re-Clocking, Nouveau Remains Behind NVIDIA's Proprietary Linux Driver
  2. The Power Consumption & Efficiency Of Open-Source GPU Drivers
  3. AMD R600g/RadeonSI Performance On Linux 3.16 With Mesa 10.3-devel
  4. Intel Pentium G3258 On Linux
Latest Linux Articles
  1. AMD Catalyst 14.6 Does Slightly Better With APITest OpenGL Tests
  2. Updated Source Engine Benchmarks On The Latest AMD/NVIDIA Linux Drivers
  3. Nouveau vs. Radeon vs. Intel Tests On Linux 3.16, Mesa 10.3-devel
  4. KVM Benchmarks On Ubuntu 14.10
Latest Linux News
  1. Builder: A New Development IDE Being Built For GNOME
  2. GDB 7.8 Betters Python Scripting, Adds Guile Support
  3. GNOME's GTK+ Is Still Striving For A Scene Graph, Canvas API
  4. Unreal Tournament Looks Great For Team Deathmatch
  5. LibreOffice 4.3 Released With Many Exciting Changes
  6. GNOME/GTK On Wayland Gains Focus At GUADEC
  7. GNOME Stakeholders Take Issue With Groupon Over their Gnome
  8. GStreamer VA-API Plug-In Update Adds New Features
  9. Qt 5.4 Going Into Feature Freeze Next Week With Exciting Changes
  10. OpenSUSE Factory Turns Into Rolling Release Distribution
Latest Forum Discussions
  1. Grand Theft Auto Running On Direct3D Natively On Linux Shows Gallium3D Potential
  2. Open-source drivers on ATI R7 260X
  3. AMD Athlon 5350 APU On Linux
  4. Debian + radeonsi
  5. Linus Torvalds On GCC 4.9: Pure & Utter Crap
  6. Updated and Optimized Ubuntu Free Graphics Drivers
  7. List of Linux friendly Kickstarter projects
  8. Porting Mesa to the Playstation 2