.swap_buffers_region = dri2_x11_swap_buffers_region,
.post_sub_buffer = dri2_x11_post_sub_buffer,
.copy_buffers = dri2_x11_copy_buffers,
.swap_buffers_region = dri2_x11_swap_buffers_region,
.post_sub_buffer = dri2_x11_post_sub_buffer,
.copy_buffers = dri2_x11_copy_buffers,