<html><head></head><body><div class="yahoo-style-wrap" style="font-family:Helvetica Neue, Helvetica, Arial, sans-serif;font-size:13px;"><div dir="ltr" data-setdir="false">Thanks (also Dave and Carsten)! Full of useful information not easily found (if even found) on the Internet! So, in summary, the communication is done through a series of memory mapped regions in the address space of the graphics library (e.g., OpenGL).</div><div dir="ltr" data-setdir="false">The image data is transferred 1) from the X client to the X server and 2) from there to the graphics library. Are both of these transfers made using shared memory?<br></div></div></body></html>