Re: Xlib and Xinerama: Ints vs. Shorts?
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On 01/06/12 02:44, Christopher Howard wrote:
This is my first post to this list, so pardon any breach of protocol: but I was rather curious about something and this seemed like the only place where someone might actually know the answer. Why is it that in Xlib.h, the x,y,width,height members are always declared as ints, but in Xinerama.h (in XineramaScreenInfo, specifically) they ended up being shorts? Naively, it would seem strange that Xinerama heads would be restricted to a dimension that could be considerably smaller than that allowed for the actual display.
All coordinates and screen/pixmap sizes in the actual protocol are 16-bit numbers. The Xlib mapping of those to C types is just generally a series of mistakes baked into the API 25 years ago. (Just wait until you find the places you have to cast 32-bit numbers to "long" and back.) We hope to have made fewer mistakes in the design and implementation of the XCB API, but only time will tell. -- -Alan Coopersmith- alan.coopersmith@xxxxxxxxxx Oracle Solaris Platform Engineering: X Window System _______________________________________________ xorg@xxxxxxxxxxx: X.Org support Archives: http://lists.freedesktop.org/archives/xorg Info: http://lists.x.org/mailman/listinfo/xorg Your subscription address: list-xorg@xxxxxxxxxxx
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