Some of this development also needs to happen before OpenGL ES 3.0 support is reached by Mesa/Gallium3D as well.īelow is the Mesa G元/GL4 status documentation as of this evening in Git. However, for OpenGL 4.0/4.1/4.2/4.3 there's still much left where I would be very surprised if that's reached before 2014, unless some profound shift happens with Mesa/Gallium3D development (keep in mind that it took nearly four years for Mesa to go from OpenGL 2.1 to 3.0 support). Perhaps in the following Mesa release it will be able to jump straight to OpenGL 3.2 or even OpenGL 3.3 if being rather optimistic. Large portions of the OpenGL 3.1/3.2/3.3 are nearing (or at) completion, but still it will be at least until early next year that a major new version of OpenGL compliance is reached - Mesa 8.1 is coming this month and there's still a six-month release cycle for major Mesa releases. Before some of the GL 4.3 specifications can be implemented, earlier versions of the OpenGL specifications need to be implemented where needed. The other OpenGL 4.3 extensions like ARB_ES3_compatibility, ARB_arrays_of_arrays, and ARB_copy_image have yet to be started. The GL_ARB_debug_output support in Mesa originated with a request from Valve for Mesa supporting this OpenGL extension that allows for applications/games to be notified when different events occur, which is used during application development and testing/debugging. Early work on the ARB_compute_shader extension has been done within Gallium3D and is used for dealing with graphics compute programs/shaders, but the support is currently incomplete.
From what made it into the OpenGL 4.3 specification, the only items that have been started by Mesa developers to date has been GL_ARB_compute_shader and GL_ARB_debug_output. There's many new OpenGL 4.3 functions to support aside from all of the new features of the matching GL Shading Language update. Unfortunately, there's a lot left with officially Mesa/Gallium3D still being limited to OpenGL 3.0 compliance. The Mesa documentation was updated today to reflect what's left in supporting the latest revisions of the OpenGL standard.
However, the open-source Mesa support will still be a ways out. AMD will also soon be released a Catalyst beta with the GL 4.3 / GLSL 4.30 support. While the OpenGL 4.3 specification was just released (along with OpenGL ES 3.0), there's already a beta NVIDIA Linux proprietary driver supporting this latest desktop graphics API from Khronos.
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