Behdad Esfahbod behdad at
Thu Apr 9 08:16:04 PDT 2009

On 04/09/2009 11:10 AM, Jim Gettys wrote:
> Since when you are doing certain few applications (actual WSIWYG layout,
> or the use of the screen as a ruler, which we do on OLPC), you really do
> want the actual DPI; it's just we *also* need to know the typical
> viewing distance.....

You have a very good point here.  I promoted redefining DPI to be magical 
scale-factor before, but now I understand that that's not the right approach. 
  I'll keep that in mind when working with David on resolution-independence 
support in GTK+ later this year.


> And in the past, we never had the viewing distance in X11's design: our
> presumption was then always desktop monitors, viewed at the "usual"
> desktop distance).  It is entirely missing from the core protocol.
> We've been missing one value from day one, and the one that actually
> makes DPI make sense for 98% of applications we use on a day to day
> basis....
>                             - Jim

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