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A 30,000 Line Patch For Mesa Brings Geometry Shaders

Mesa

Published on 13 September 2009 06:12 PM EDT
Written by Michael Larabel in Mesa
7 Comments

Zack Rusin has been working on a lot of Linux graphics code lately from an OpenCL state tracker to other Gallium3D state trackers like X-Video / EXA. On top of this, he has just formally announced his work on bringing Geometry Shaders to Mesa.

Geometry Shaders were introduced on the Microsoft side with DirectX 10.0 through Shader Model 4.0 and in the OpenGL world can be found with the most recent 3.2 release (or earlier using the GL_EXT_geometry_shader4 extension).

Zack's Geometry Shaders support comes in a patch that's over 30,000 lines of code and touches many different parts of the Mesa 3D stack. However, this new support is considered "basically working" (bugs may be aplenty) and the only driver implementing this geometry shading support is the Gallium3D software driver.

Right now it's being decided whether the support for geometry shaders will land in Mesa 7.7 or Mesa 7.8. Mesa 7.6 isn't even out the door yet, so it will still be some months before this initial code is found within most Linux distributions. Zack's mailing list message can be read on mesa3d-dev.

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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