[Bug 2835] add symbol exports for XReadDisplay extension

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https://bugs.freedesktop.org/show_bug.cgi?id=2835          
     




------- Additional Comments From ajax at nwnk.net  2005-03-30 10:42 -------
aiui, it allows you to read back the colors actually displayed on the screen,
regardless of the visual used in each drawable, (possibly) including overlays.

i don't know of an open source implementation, or even if the spec is published
anywhere; google isn't being particularly helpful.  SGI ships it with their
XFree86-based servers though, and will ship it against Xorg too.

any open source implementation would need these symbols too, since the cursor
could be part of the displayed image.          
     
     
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