This OpenGL 4.3 support for R600g is in place after finishing up the robust buffer access code (ARB_robust_buffer_access_behavior) and some other bits in the early morning hours of today. The MESA_GL_VERSION_OVERRIDE and MESA_GLSL_VERSION_OVERRIDE environment variables are what's worthwhile if you are in that boat. But with no major Linux games relying upon FP64 functionality, overriding the exposed OpenGL version tends to work as well for these other vintage Radeon GPUs to get some GL 4.0~4.2 (and now 4.3) games potentially working. There has been work on "soft" FP64 support for these other GPUs so they too could move on to seeing official OpenGL 4.x support, but there is nothing ready for merging yet. All the rest of the HD 5000/6000 series and other R600g-supported hardware is still limited to OpenGL 3.3 support.Ĭayman GPUs are now among the select pre-GCN Radeon hardware having OpenGL 4.3 via the open-source Mesa driver stack. That means just the Radeon HD 5800 series and HD 6900 Cayman series. But the big caveat is that's only for the R600g-using hardware exposing FP64 support right now. The R600g driver is now able to officially expose OpenGL 4.3 support. In between hacking on the RADV Vulkan driver, David Airlie has found the time to land his patches enabling OpenGL 4.3 and GLSL 430 support within Mesa 17.4-dev Git for the R600g driver.
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