Xephyr is a kdrive based X Server which targets a window on a host X Server as its framebuffer. Unlike Xnest it supports modern X extensions ( even if host server doesn't ) such as Composite, Damage, randr etc (no GLX support now). It uses SHM Images and shadow framebuffer updates to provide good performance. It also has a visual debugging mode for observing screen updates.
Possible uses include;
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Xnest replacement - Window manager, Composite 'gadget', etc development tool.
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Toolkit debugging - rendundant toolkit paints can be observered easily via the debugging mode.
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X Server internals development - develop without the need for an extra machine / display.
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Multiterminal with Xephyr - configuration is a single computer which supports multiple users at the same time
Xephyr 是一個 X server,但它需執行在一個存在的 X server環境裏面,不像Xnest,因爲 Xnest 不提供現代 X server 的一些高級特性,比如圖形加速的支持。所以Xephyr可以用來做很多事情,比如需要通過 XDMCP 連接到另外一臺主機,那麼不需要另外打開一個新的 X server;又比如正在寫一個 window manager,那麼在一個 X server 裏面打開的 X server 裏面調試,將會比直接在現有的 X server 裏面替換現有的 window manager 方便很多。
軟件環境:作爲MeeGo應用程序模擬器,目前僅僅支持Linux。
硬件環境:CPU: 32bit Intel(r) Atom(tm) or Intel(r) Core(tm) 2 CPU (support for SSSE3)。兼容的Intel顯卡芯片(Requires intel graphics)。
GMA-500,Nvidia,以及ATI的芯片組都無法提供支持。
在終端運行Xephyr,可在新窗口開啓一個MeeGo UI。這樣終端變成一個虛擬的MeeGo系統。在這個程序模擬器中
可以使用"yum install"快速的添加新的安裝包。 用chroot中運行Qt Creator,用它來調試應用程序。