Iago Toral of consulting firm Igalia has been working on ARB_shader_storage_buffer object support in Mesa the past few months. This extension is needed for OpenGL 4.3 and is a buffer that allows for bidirectional communication between the CPU and GPU space and perform random access reads/writes and atomic operations on variables within the buffer objects.

Toral has written today a new, lengthy blog post about implementing ARB_shdader_storage buffer for Mesa. For those interested in the inner-workings and the big task it was implementing this support, read this blog post.

If you want to learn more about the ARB_shader_storage_buffer extension, visit the OpenGL.org registry.