Raspberry Pi 4's V3D Driver Adds OpenGL ES 3.2 Geometry Shader Support

The Broadcom V3D Gallium3D driver within Mesa 20.0 now has initial support for geometry shaders as needed by OpenGL ES 3.2.

Iago Toral of Igalia landed his OES_geometry_shader support into Mesa 20.0-devel overnight. Since Eric Anholt left Broadcom for Google, taking over maintenance of the V3D open-source code-base has been the folks over at Igalia. They have been working to iron out Open GL ES 3.1 and then OpenGL ES 3.2 with the big pieces like the now-accomplished geometry shaders support.

This pull request for OES_geometry_shader in V3D was merged yesterday so Raspberry Pi 4 users when upgrading to Mesa 20.0 can now make use of geometry shaders.