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Re: x-display-pixel-width/height inconsistency

From: Jan Djärv
Subject: Re: x-display-pixel-width/height inconsistency
Date: Sat, 23 Mar 2013 14:35:39 +0100


23 mar 2013 kl. 07:15 skrev Eli Zaretskii <address@hidden>:

> What you say in those messages boils down to
>  . the X11 behavior is documented in the manual
>  . Emacs on X11 cannot distinguish between physical monitors that
>    belong to the same display
> As I write above, the first point is only partially true
> (display-mm-width/height are not documented as describing the virtual
> screen, and the x-display-* primitives are not documented at all).  As
> for the second point, I don't see how it can be any guideline to make
> a decision, since both NS and W32 _can_ distinguish between physical
> monitors (if we include the appropriate code).
> So the question still stands: which behavior should be considered
> "correct" and which a "missing feature".

I guess the X11 port was coded before multiple monitors was common. When it was 
discovered that the primitives used returned the whole combined size, that 
behaviour was documented. I doubt there was any well thought out reason for 
having it like it is. Well, finding monitor sizes was probably hard to 

But that is hardly a reason to keep it as it is. We can do better now.

    Jan D.

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