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 Support For GL4's Separate Shader Objects

Mesa

Published on 06 April 2013 06:45 PM EDT
Written by Michael Larabel in Mesa
6 Comments

Patches were published on Friday for the ARB_separate_shader_object extension of the OpenGL 4.1 specification.

The GL_ARB_separate_program_objects extensions allows for using different shaders for different stages, similar to Microsoft's Direct3D, NVIDIA Cg, and older versions of OpenGL. For a more thorough explanation, the OpenGL registry specification explains:
Conventional GLSL requires multiple shader stages (vertex, fragment, geometry, tessellation control, and tessellation evaluation) to be linked into a single monolithic program object to specify a GLSL shader for each stage.

While GLSL's monolithic approach has some advantages for optimizing shaders as a unit that span multiple stages, all existing GPU hardware supports the more flexible mix-and-match approach.

Shaders written for HLSL9, Cg, the prior OpenGL assembly program extensions, and game console favor a more flexible "mix-and-match" approach to specifying shaders independently for these different shader stages. Many developers build their shader content around the mix-and-match approach where they can use a single vertex shader with multiple fragment shaders (or vice versa).

This extension adopts a "mix-and-match" shader stage model for GLSL allowing multiple different GLSL program objects to be bound at once each to an individual rendering pipeline stage independently of other stage bindings. This allows program objects to contain only the shader stages that best suit the applications needs.
The Mesa support for separate OpenGL shader program objects come in the form of 12 patches and currently reside on the Mesa mailing list. This support comes for both the classic Intel Mesa driver as well as the Gallium3D drivers.

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. A Walkthrough Of The New 32 System Open-Source Linux Benchmarking Test Farm
  2. Habey MITX-6771: Mini-ITX Board With Quad-Core J1900 Bay Trail
  3. OCZ Vector 150 SSD On Linux
  4. Noctua i4 CPU Cooler: Great For Cooling High-End LGA-2011v3 CPUs
Latest Linux Articles
  1. AMD Kaveri: Open-Source Radeon Gallium3D vs. Catalyst 14.12 Omega Driver
  2. 12-Way AMD Catalyst 14.12 vs. NVIDIA 346 Series Linux GPU Comparison
  3. AMD Catalyst 14.12 Omega Driver Brings Mixed Results For Linux Users
  4. 6-Way Winter 2014 Linux Distribution Comparison
Latest Linux News
  1. KDE Applications 14.12 Released
  2. Fedora 21 Released For POWER & AArch64 Hardware
  3. Elasticsearch & wxPython 3 Proposed For Fedora 22
  4. The New SuperTuxKart Looks Better, But Can Cause GPU/Driver Problems
  5. GTK+ On Windows Now Supports OpenGL
  6. New Ruby Benchmarks On GCC vs. LLVM Clang Compilers
  7. Multi-Stream Transport 4K Monitors To Become Better Supported On Linux
  8. New Supertuxkart Beta Lands New Graphics Engine, Uses OpenGL 3.1+
  9. SuperX 3.0 Beta Continues To Polish The KDE Desktop Experience
  10. Radeon vs. Modesetting DDX Performance Comparison
Latest Forum Discussions
  1. Need some hand holding with upgrading xserver
  2. Ubuntu Developers Still Thinking What To Do About Adobe Flash Support
  3. XLennart: A Game For Systemd Haters With Nothing Better To Do
  4. Microsoft buying Mojang
  5. Updated and Optimized Ubuntu Free Graphics Drivers
  6. Premium subscription "login" times out much faster than forum
  7. AMD Catalyst 14.12 Linux Driver Released -- Huge Update!
  8. Did Valve already get what they wanted from SteamOS? i.e. Win kernel + BigPicture DE