ARB_copy_image Support Lands For AMD RadeonSI

Marek Olšák has landed support for OpenGL 4.3's ARB_copy_image extension, which is used by several modern Steam Linux games.

The Intel Mesa driver had already supported this extension while now RadeonSI is the first Gallium3D driver to do so. BioShock Infinite is one of the games making use of ARB_copy_image support on Linux.

As explained via the OpenGL.org registry, "This extension enables efficient image data transfer between image objects (i.e. textures and renderbuffers) without the need to bind the objects or otherwise configure the rendering pipeline."

The support landed this morning via this commit. It will still be a while though before RadeonSI officially supports OpenGL 4.3 since first it still needs to finish up GL_ARB_shader_image_load_store and GL_ARB_shader_atomic_counters for OpenGL 4.2. When RadeonSI has GL 4.2, there are seven other OpenGL 4.3 extensions still to be implemented. Thus it probably won't be until some time in 2016 when OpenGL 4.3 is there for RadeonSI.