SNA (computer graphics) Source: en.wikipedia.org/wiki/SNA_(computer_graphics)
The XAA/EXA/UXA/SNA APIs are for the 2D graphics drivers inside the X server. Note, that modern software uses direct rendering.Glamor obsoletes DDX, here with XWayland.
In computing, SNA (Sandybridge's New Acceleration) is a graphics acceleration architecture for the X.Org Server developed by Intel as a replacement for UXA.[1]