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ARB Texture Gather Support Finally Added To Gallium3D

Mesa

Published on 25 February 2014 06:15 AM EST
Written by Michael Larabel in Mesa
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Several months after core Mesa and Intel's DRI driver received support for the ARB_texture_gather extension, Gallium3D drivers now have support for this OpenGL 4.0 extension.

ARB_texture_gather is an OpenGL extension required by version 4.0 and described by the OpenGL.org registry as "a new set of texture functions (textureGather) to the shading language that determine 2x2 footprint that are used for linear filtering in a texture lookup, and return a vector consisting of the first component from each of the four texels in the footprint."

Radeon and Nouveau Gallium3D drivers will finally be able to tap this texture-gather support originally developed by Intel for their own driver. David Airlie of Red Hat hooked in the support for Gallium3D via this Gallium commit and this Mesa state tracker commit.

The new code also works towards enabling (but not yet completed) of the GL_ARB_gpu_shader5 extension. These changes will be part of Mesa 10.2 and not the Mesa 10.1 release due later this week.

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 .
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