All GL application are displayed at the end on a Window. this window are traditional X Server window, which could be clipped, moved, etc. I would like to add support to redirect the image, which should be displayed at the end of rendering in a window to an off-screen or a pixmap. I want to add this to XComposite extension.
is that theoritical could be done? or there technical problem on the current implementation in X server or DRI?
Actually, GLX supports rendering to Pixmaps & PBuffers, which seems to be what you're asking for, so no new extensions are required. Have a look at the GLX spec from opengl.org.
There is quite a bit of work to get this working with the DRI though.
Keith
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