Re: display-mm-width return value off on Windows

[storm@cua.dk (Kim F. Storm)]

Ralf Angeli <angeli@caeruleus.net> writes:

> * Eli Zaretskii (2006-07-09) writes:
>
>>> As a last resort we could provide user options (in Emacs) for setting
>>> the correct size of the screen which will be used as return values for
>>> `display-mm-{width,height}'.
>>
>> Sounds like a good plan to me.
>
> Here are change log entries and patches to achieve that:
>
> 2006-07-11  Ralf Angeli  <angeli@caeruleus.net>
>
> 	* frame.el (display-mm-height): New variable.
> 	(display-mm-height): Use it.
> 	(display-mm-width): New variable.
> 	(display-mm-width): Use it.

This change makes things worse if you have multiple displays.

As I said previously, a change would have to be able to 
specify values "per-display", e.g. using an alist with
elements (display . (width height))

But it still doesn't fix other problems related to the
OS providing incorrect size/resolution values for a display
(that requires changes on C level too).


> 2006-07-11  Ralf Angeli  <angeli@caeruleus.net>
>
> 	* w32fns.c (Fx_display_mm_height, Fx_display_mm_width): Calculate
> 	size of display by means of size in pixels and number of pixels
> 	per inch.

This change may be good by itself -- install it if nobody objects in a
few days.

-- 
Kim F. Storm <storm@cua.dk> http://www.cua.dk