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 Benchmarking Platform
Phoromatic Test Orchestration

LLVMpipe Driver Can Almost Do OpenGL 3.0~3.1

Mesa

Published on 15 July 2013 08:18 PM EDT
Written by Michael Larabel in Mesa
Comment On This Article

With the arrival of sRGB frame-buffers support, the Gallium3D LLVMpipe software driver is nearly ready to advertise OpenGL 3.0 support and OpenGL 3.1 is also attainable.

As covered earlier today, most of Mesa/Gallium3D is nearing OpenGL 3.2~3.3 compliance. However, besides the RadeonSI Gallium3D driver, LLVMpipe has also been living in an OpenGL 2.1 era.

While LLVMpipe is software-based and leverages LLVM without any GPU hardware requirements, it hasn't yet seen OpenGL 3.x support. LLVMpipe just doesn't receive the same level of attention and development work as the Intel/Radeon/Nouveau drivers even though it's increasingly used as the software fallback method for modern Linux desktops.

Roland Scheidegger of VMware committed sRGB frame-buffers support for the driver on Monday to mainline Mesa with this commit. "Just use the new conversion functions to do the work. The way it's plugged in into the blend code is quite hacktastic but follows all the same hacks as used by packed float format already. Only support 4x8bit srgb formats (rgba/rgbx plus swizzle), 24bit formats never worked anyway in the blend code and are thus disabled, and I don't think anyone is interested in L8/L8A8. Would need even more hacks otherwise."

The ARB_framebuffer_sRGB OpenGL extension provides support for sRGB frame-buffer updating and blending over OpenGL's traditional assumptions of frame-buffer color components being in a linear color-space. With LLVMpipe now meeting the sRGB frame-buffers requirement, the only major item apparently left for this driver is multi-sample anti-aliasing (MSAA) support before it reaches OpenGL 3.0 compliance. Roland also notes that there's nothing else holding it back from OpenGL 3.1 compliance once MSAA is in place.

It's good to see LLVMpipe finally getting close to residing in a GL3 world. The LLVMpipe performance is also much better in the upcoming Mesa 9.2 release.

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. Turning A Basement Into A Big Linux Server Room
  2. NVIDIA's $1000+ GeForce GTX TITAN X Delivers Maximum Linux Performance
  3. OS X 10.10 vs. Ubuntu 15.04 vs. Fedora 21 Tests: Linux Sweeps The Board
  4. The New Place Where Linux Code Is Constantly Being Benchmarked
  5. 18-GPU NVIDIA/AMD Linux Comparison Of BioShock: Infinite
  6. Phoronix Test Suite 5.6 Adds New Phoromatic Enterprise Benchmarking Features
Latest Linux News
  1. Linux 4.0-rc6 Kernel Released
  2. Automatically Managing The Linux Benchmarks Firing Constantly
  3. The Big Features Of The Linux 4.0 Kernel
  4. Mesa's Android Support Is Currently In Bad Shape
  5. Wayland's Weston Terminal Can Now Be Minimized
  6. Phoronix - Working Towards Faster Page Loads
  7. Improved OpenCL Support For Blender's Cycles Renderer
  8. Mesa 10.5.2 Packs In A Handful Of Fixes
  9. More Fedora/Ubuntu Linux vs. OS X OpenGL Benchmarks
  10. Intel Adds Mesa IR To NIR Translator & Makes Other NIR Improvements
Most Viewed News This Week
  1. Introducing The Library Operating System For Linux
  2. Allwinner Continues Jerking Around The Open-Source Community
  3. AMD Is Hiring Two More Open-Source Linux GPU Driver Developers
  4. Open-Source Driver Fans Will Love NVIDIA's New OpenGL Demo
  5. Systemd Change Allows For Stateless Systems With Tmpfs
  6. GNOME 3.16 Released: It's Their Best Release Yet
  7. GNOME Shell & Mutter 3.16.0 Released
  8. GNU Nano 2.4.0 Brings Complete Undo System, Linter Support & More