95 Patches Ready The Intel Mesa Driver For OpenGL 4 On Haswell

Iago Toral Quiroga of Igalia has published a set of 95 patches that make the i965 Mesa DRI driver in a state for exposing OpenGL 4.0 for Haswell hardware by wiring in the ARB_gpu_shader_fp64 extension.

For Broadwell and newer, the Intel Mesa driver has already supported OpenGL 4.3 since Mesa 12.0 while Haswell and Ivy Bridge were left behind. With today's patches, those using Haswell CPUs with Intel HD/Iris Graphics could finally benefit from OpenGL 4.0 -- assuming you apply the patches yourself or wait for them to be reviewed and merged to Git.

The FP64 support has been the main blocker from letting Haswell enter the GL4 world as the support had to be rewritten for its VEC4 back-end. This Haswell FP64 code amounts to nearly 2,000 lines of new code.

More details via this patch series, which will hopefully be reviewed and ready for merging ahead of Mesa 12.1 in September. More details on the back story and Igalia's comments via the recent Developers Are Still Working On OpenGL 4.x For Intel Haswell / Ivy Bridge.