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Old 05-24-2008, 10:26 AM   #1
Registered: Oct 2007
Distribution: Gentoo, Slackware
Posts: 162

Rep: Reputation: 16
x11 offscreen window rendering?

i think i read something about offscreen window rendering in linux (i'm not sure about it). But is this enabled by default (i use slackware)? Does it even exist? And how can i activate it?

Last edited by konqi; 05-24-2008 at 10:31 AM.
Old 05-26-2008, 07:18 PM   #2
Registered: May 2008
Posts: 101

Rep: Reputation: 15
off-screen image or window

Off-screen rendering is quite common. The most basic use is to display a window double-buffered to avoid flickering - usually done with animations or window managers.

To implement it you need to write programs using one or more graphic libraries, like Xlib, Cairo, Allegro or similar.

A graphic canvas is actually just a memory allocation. To make it show up on your monitor it has to be copied to the video memory of your video device (monitor).

The term off-screen window can also mean a window that is simply placed outside of the visible part of the display. This was quite common with old Mac systems, where windows where hidden simply by moving them out from the visible view.

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Last edited by seraphim172; 06-25-2008 at 05:32 AM.


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