Open-Source Tessellation Lands For Pre-Broadwell Intel Hardware

[phoronix]

Phoronix: Open-Source Tessellation Lands For Pre-Broadwell Intel Hardware

Back on Christmas was news of patches for implementing tessellation shader support for Intel Ivy Bridge and Haswell graphics hardware after support had already landed for Broadwell and newer within the Mesa driver. Support for those older generations is now present in Mesa...

http://www.phoronix.com/scan.php?page=news_item&px=Tessellation-For-Pre-Broadwell

[rabcor]

Thankfully I have a fermi 550-Ti in my old Sandy Bridge computer.

[gsedej]

II am really interested if my Haswell i7-4700qm will make 5FPS@minimum on Bioshock Infinite. Even GF840m can't run smooth 720p@max.

Anyway, great work intel 01.org team!

[chrisr]

Interesting... so how do I enable this support? My laptop describes its Intel GPU as:

"Intel Corporation Broadwell-U Integrated Graphics" (8086:1616, rev 09)

which would seem to be compatible (i.e. "Broadwell"). And I have compiled Mesa from Git with the following options:

--with-dri-drivers=i965
--with-gallium-drivers=
--enable-texture-float
--enable-driglx-direct
--enable-glx-tls

However, glxinfo reports this:

OpenGL vendor string: Intel Open Source Technology Center
OpenGL renderer string: Mesa DRI Intel(R) HD Graphics 5500 (Broadwell GT2)
OpenGL core profile version string: 3.3 Mesa 11.2.0-devel (git-65d3f85)
OpenGL core profile shading language version string: 3.30

and there is no sign of "tessellation" in the output. In fact, there's no sign of ARB_gpu_shader5 either! Have I missed something?

Cheers,
Chris