Nouveau Picks Up Slightly Better OpenGL 4.0 Support
Written by Michael Larabel in Nouveau on 7 April 2014 at 08:45 AM EDT. 24 Comments
The open-source Nouveau NV50 and NVC0 Gallium3D drivers have advanced slightly in their conquest towards OpenGL 4.0 compliance.

Ilia Mirkin, an independent open-source developer that's becoming one of the most prolific Nouveau developers in recent times, landed a bunch of Nouveau NV50/NVC0 Gallium3D driver code this morning. The NV50 driver supports the GeForce 8 through GeForce 300 series while the NVC0 driver supports the GeForce 400/500 Fermi hardware and beyond.

The newly exposed extensions by the Nouveau Gallium3D code include ARB_texture_gather and ARB_texture_query_lod. The Intel Mesa driver had already supported both of these OpenGL extensions while the R600/RadeonSI Gallium3D drivers supported the latter extension as well.

With those latest commits, here's what the OpenGL 4 extension coverage looks like for the main Mesa/Gallium3D drivers per the latest GL3.txt TODO in Git:
GL 4.0:

GLSL 4.0 not started
GL_ARB_texture_query_lod DONE (i965, nv50, nvc0)
GL_ARB_draw_buffers_blend DONE (i965, nv50, nvc0, r600, radeonsi, softpipe)
GL_ARB_draw_indirect DONE (i965)
GL_ARB_gpu_shader5 started
GL_ARB_gpu_shader_fp64 not started
GL_ARB_sample_shading DONE (i965)
GL_ARB_shader_subroutine not started
GL_ARB_tessellation_shader not started
GL_ARB_texture_buffer_object_rgb32 DONE (i965, nvc0, r600, radeonsi, softpipe)
GL_ARB_texture_cube_map_array DONE (i965, nv50, nvc0, r600, softpipe)
GL_ARB_texture_gather DONE (i965, nv50, nvc0)
GL_ARB_transform_feedback2 DONE (i965, nv50, nvc0, r600, radeonsi)
GL_ARB_transform_feedback3 DONE (i965, nv50, nvc0, r600, radeonsi)

Most of the work left is with the GL Shading Language changes along with GL_ARB_tessellation_shader, GL_ARB_shader_subroutine, and GL_ARB_gpu_shader_fp64. I'm becoming more hopeful that we'll see OpenGL 4.0 open-source support out of the Intel Linux driver in 2014, but after that there's still a lot of work to be done for the OpenGL 4.1, 4.2, 4.3, and 4.4 specifications.
About The Author
Author picture

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 Twitter or contacted via MichaelLarabel.com.

Related Nouveau News
Popular News
Trending Reviews & Featured Articles