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

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 Linux Hardware Reviews
  1. Intel Launches The Core i7 5960X, Mighty Powerful Haswell-E CPUs
  2. AMD Radeon R9 290: Gallium3D vs. Catalyst Drivers
  3. AMD Radeon R9 290 Open-Source Driver Works, But Has A Ways To Go
  4. Trying The Configurable 45 Watt TDP With AMD's A10-7800 / A6-7400K
Latest Linux Articles
  1. The Fastest NVIDIA GPUs For Open-Source Nouveau With Steam Linux Gaming
  2. Testing For The Latest Linux Kernel Power Regression
  3. The Most Energy Efficient Radeon GPU For AMD Linux Gaming
  4. 20-Way Radeon Comparison With Open-Source Graphics For Steam On Linux Gaming
Latest Linux News
  1. Canonical Has Yet To Land X.Org Server 1.16 For Ubuntu 14.10
  2. Imagination Launches A MIPS Development Board
  3. Getting Involved With The New Raspberry Pi Graphics Driver
  4. A New AMD Catalyst Linux Driver Unofficially Surfaces
  5. LibreOffice Ported To 64-bit ARM (AArch64)
  6. Enlightenment E19 RC3 Shows Off The New Wayland Compositor
  7. Metro Redux Is Going To Require OpenGL 4.x On Linux
  8. Jailhouse v0.1 Released As A Basic Hypervisor For Linux
  9. Google's Chromebook "Samus" Now Supported By Coreboot
  10. Chrome 38 Now In Beta With Exciting Advancements
Latest Forum Discussions
  1. Btrfs Gets Talked Up, Googler Encourages You To Try Btrfs
  2. Catalyst 14.201.1008
  3. It's Now Possible To Play Netflix Natively On Linux Without Wine Plug-Ins
  4. Users defect to Linux as OpenBSD removes Lynx from base system
  5. Updated and Optimized Ubuntu Free Graphics Drivers
  6. Canonical Joined The Khronos Group To Help Mir/Wayland Drivers
  7. Radeon HD5670 and Ubuntu 14.04
  8. AMD Releases UVD Video Decode Support For R600 GPUs