[$] The Linux graphics stack in a nutshell, part2

Displaying an application's graphical output onto the screen requirescompositing and mode setting that are correctly synchronized among the various pieces,with low overhead.In this second and final article in the series, we will look atthose pieces of the Linux graphics stack. In the first installment, we followed the path of graphics from the application, through Mesa, whileusing the memory-management features of the kernel's DirectRendering Manager (DRM) subsystem.We ended up with an application's graphics data stored in an output buffer,so nowit's time to display the image to the user.