Hello, I'm novice in X System. I read i830_video.c in xf86-video-intel 2.12.0, and have several questions about X Video extension. 1. The prototype of PutImage() seems to be a complete "overlay" way. I have been quite confusing after read <a href="http://en.wikipedia.org/wiki/X_video_extension#The_role_of_window_manager_support_and_compositing">http://en.wikipedia.org/wiki/X_video_extension#The_role_of_window_manager_support_and_compositing</a> , which mentions compositing vs overlay. Is it possible to composite/stack/etc. with current X Video extension? 2. In i830_video.c, it seems that the only difference between "textured" and "overlay" methods is PutImage func ptr. So why both of them is necessary? 3. I have no knowledge of Intel GMA hardware, and didn't understand i830_video.c well. One quick question is that, in the "textured" PutImage(), what is the render target? Where is the code setting that render target? yours, Jim Liu