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

Intel Broadwell On Mesa Gets Support For A New OpenGL 4.3 Extension

Mesa

Published on 05 March 2014 12:12 AM EST
Written by Michael Larabel in Mesa
2 Comments

Intel's Mesa DRI driver on Linux has picked up support for another OpenGL 4 extension, but for now at least the hardware support is limited to the yet-to-be-released Broadwell.

The ARB_stencil_texturing extension is what's now supported by the latest Mesa 10.2-devel Git code for Mesa after previously only the API was in place without any Mesa GPU driver support. As explained via the OpenGL.org registry, the extension allows allows texturing of the stencil component of a packed depth stencil texture.

Unfortunately for Intel users right now, this extension is only hooked up for the upcoming Broadwell processors. As explained in the commit message, "On earlier hardware, we had to implement math in the shader to translate Y-tiled or untiled coordinates to W-tiled coordinates (which is what BLORP does today in order to texture from stencil buffers). On Broadwell, we can simply state that it's W-tiled in SURFACE_STATE, and adjust the pitch. This is much easier."

The good news for pre-Broadwell owners is that Topi Pohjolainen of Intel published on the Mesa mailing list in late February a set of patches implementing ARB_stencil_texturing support for Sandy Bridge and newer hardware, which will hopefully be merged soon.

At least Broadwell is looking good on Linux for when it debuts in a few months time, but officially the OpenGL compliance for the Intel Mesa driver is still at OpenGL 3.3 with a number of GL4 extensions being supported but OpenGL 4.0 support likely won't be officially reached until at least later in the year.

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. Scythe Mugen MAX
  2. Intel Core i7 5960X Haswell-E On Linux
  3. Intel 80GB 530 Series M.2 SSD On Linux
  4. With A New Motherboard, The Core i7 5960X Haswell-E Lights Up
Latest Linux Articles
  1. A Tour Of The New Phoronix Office
  2. 7-Way Linux Desktop Gaming Comparison On Ubuntu 14.10
  3. Intel P-State vs. CPUFreq Benchmarks On The i7-5960X
  4. RadeonSI GLAMOR Benchmarks With X.Org Server 1.16
Latest Linux News
  1. Linux 3.17-rc6 Released; Linux 3.17 Final Might Come In One Week
  2. X.Org Server 1.16.1 Released
  3. Mesa Gets Closer To Having OpenGL 4.0 Tessellation Support
  4. Uselessd: A Stripped Down Version Of Systemd
  5. F2FS Tools Gain FSCK Support
  6. FreeBSD 10.1 Has The New VT Driver, Hardware Improvements
  7. AntiMicro 2.6 Yields Greater Compatibility For Gamepads On Linux
  8. OpenGL 3.3 / GLSL 3.30 Lands For Intel Sandy Bridge On Mesa
  9. AMD's RadeonSI Gallium3D Driver Sees Some Improvements
  10. Mesa 10.3 Released With The Latest Open-Source GPU Driver Improvements
Latest Forum Discussions
  1. NVIDIA GTX 770/780 -works ?
  2. Wasteland 2 Officially Launched Today, Including For Linux Gamers
  3. Trolling on the Phoronix forums
  4. X.Org Women Outreach Program Only Turns Up Two Applicants So Far
  5. New stress testing utility for GPU's
  6. ASRock AM1H-ITX: One Of The Best AM1 Mini-ITX Motherboards
  7. Can Linux kill a motherboard?
  8. Stop grabbing my keyboard :(