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Kristian Høgsberg 2010-07-28 22:52:06 -04:00
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\subsection{Replacing X11} \subsection{Replacing X11}
Over the last 10 years, a lot of functionality have slowly moved out Over time, a lot of functionality have slowly moved out of the X
of the X server and into libraries or kernel drivers. It started with server and into client-side libraries or kernel drivers. One of the
freetype and fontconfig providing an alternative to the core X fonts first components to move out was font rendering, with freetype and
and direct rendering OpenGL as a graphics driver in a client side fontconfig providing an alternative to the core X fonts. Direct
library. Then cairo came along and provided a modern 2D rendering rendering OpenGL as a graphics driver in a client side library. Then
library independent of X and compositing managers took over control of cairo came along and provided a modern 2D rendering library
the rendering of the desktop. Recently with GEM and KMS in the Linux independent of X and compositing managers took over control of the
rendering of the desktop. Recently with GEM and KMS in the Linux
kernel, we can do modesetting outside X and schedule several direct kernel, we can do modesetting outside X and schedule several direct
rendering clients. The end result is a highly modular graphics stack. rendering clients. The end result is a highly modular graphics stack.
\subsection{Make the compositing manager the display server}
Wayland is a new display server building on top of all those Wayland is a new display server building on top of all those
components. We’re trying to distill out the functionality in the X components. We are trying to distill out the functionality in the X
server that is still used by the modern Linux desktop. This turns out server that is still used by the modern Linux desktop. This turns out
to be not a whole lot. Applications can allocate their own off-screen to be not a whole lot. Applications can allocate their own off-screen
buffers and render their window contents by themselves. In the end, buffers and render their window contents by themselves. In the end,