Linked by the_randymon on Tue 29th Jan 2013 00:20 UTC
X11, Window Managers Any modern operating system consists of layers upon layers of systems, services, and libraries. Increasingly, no one can possibly have full understanding of all the layers of the cake. Here's RedHat developer Peter Hutterer's description of what it takes to move the cursor on your screen. Interesting to get back to the basics, and a good reminder of how complicated this stuff really is.
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Comment by some1
by some1 on Tue 29th Jan 2013 04:09 UTC
some1
Member since:
2010-10-05

I sort of expected him to go into how the cursor on screen is actually updated, with hardware-accelerated vs. software mode, surfaces, overlays, compositor, OpenGL, KMS etc. He got stuck on the (complicated, but rather boring) coordinates mapping.

Reply Score: 5

RE: Comment by some1
by nutt on Tue 29th Jan 2013 14:59 in reply to "Comment by some1"
nutt Member since:
2011-06-22

Yeah, also "The driver submits two relative coordinates to the server" skips over the interesting bit about how said driver acquires those coordinates. If you have something like a Bluetooth mouse, this part is much more complex than some simple coordinate transformations.

Reply Parent Score: 2