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

Mesa Gets OpenGL 3.0 Floating-Point Depth Buffers

Mesa

Published on 10 July 2011 10:29 PM EDT
Written by Michael Larabel in Mesa
9 Comments

Yet again Marek Olšák has made another great improvement to Mesa. Recently this independent developer has been working quite a lot in implementing OpenGL 3.0 support for the open-source Mesa stack. Ending out this weekend, he now has working OGL3 floating-point depth buffers per the GL_ARB_depth_buffer_float extension.

Via a handful of commits a couple hours ago, Marek landed the depth_buffer_float work. This is for core Mesa and Gallium3D. Fully implementing this support required a fair amount of work, but yet again Marek has managed to deliver. These patches originally appeared on the Mesa mailing list by Marek earlier in the month, but were now just committed to Mesa Git master.

This Phoronix Forums member has also pushed the initial depth_buffer_float render-buffer support into the R600 Gallium3D driver for the Radeon HD 5000 series and newer.

The GL_ARB_depth_buffer_float extension provides new texture internal formats where the depth components are stored as 32-bit floating-point values rather than unsigned integers. As part of it, the extension provides new packed depth/stencil pixel formats too. See more in the Khronos specification.

With floating-point depth buffers in place, all that's left for OpenGL 3.0 support in Mesa is GLSL 1.30 support, completing non-normalized integer texture/frame-buffer formats, transform feedback, completing sRGB frame-buffer support, depth format cube textures, and GLX_ARB_create_context with GLX 1.4+. The big item on the OpenGL 3.0 TODO list is completing the GL Shading Language 1.30 support.

While it will be a great milestone when OpenGL 3.0 finally arrives, the support is coming about five years after the specification was ratified and there's already OpenGL 3.1, 3.2, 3.3, 4.0, and 4.1 support to address too. When the OGL3.0 support is ready, it will be released as Mesa 8.0, which means we may not see Mesa 7.12. This next Mesa release is set to arrive in January.

Again, nice job Marek. On behalf of the Linux community, he's certainly deserving of some complementary Phoronix beer should be choose to come to the X.Org Developers Conference in Chicago or to Oktoberfest/PhoronixFest.

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 Articles & Reviews
  1. Samsung 850 EVO SSD Linux Benchmarks
  2. Kubuntu 15.04 Is Turning Out Quite Nice, Good Way To Try Out The Latest KDE
  3. 5-Way Linux Distribution Comparison On The Core i3 NUC
  4. OCZ ARC 100 Linux SSD Benchmarks
  5. Lenovo ThinkPad X1 Carbon Works Great As A Linux Ultrabook
  6. Transcend SSD370 256GB
Latest Linux News
  1. Kdenlive Ported To Qt5/KF5, Coming To KDE Applications 15.04
  2. HTC & Valve Partnered Up For The Steam VR Headset
  3. 8cc: A Small C11 Compiler
  4. Not Everyone Likes The Possible "VULKAN" Name For Next-Gen OpenGL
  5. The Binary Blobs Making Up Coreboot
  6. Linux 4.0 & LLVM vs. GCC Yielded Much Interest This Month
  7. XBMC/Kodi 15.0 Alpha 1 Released
  8. Xfce 4.12 Released After Nearly Three Years Of Work
  9. The Khronos Group Filed A Trademark On "Vulkan" API
  10. Mozilla Thunderbird Adoption Climbs, Thunderbird 38 In May
Most Viewed News This Week
  1. Linux 4.0-RC1 Tagged, Linux 4.0 Will Bring Many Notable Improvements
  2. Screenshots Of The GNOME 3.16 Changes
  3. More Proof That Allwinner Is Violating The GPL
  4. The Tremendous Features Of Fedora 22
  5. Krita 2.9 Released, Their Biggest Release Ever
  6. Linux 4.0 Doesn't Have The Weirdest Codename
  7. A Single UEFI Executable With The Linux Kernel, Initrd & Command Line
  8. Canonical Comes Up With Its Own FUSE Filesystem For Linux Containers
%%CLICK_URL_UNESC%%