Around 10 o'clock on Nov 22, Carl Worth wrote:

> Is the Xft.dpi resource intended to be the "logical dpi" as you
> described:

Yes, as noted:

"Xft already uses a separately configurable value (Xft.dpi) that can be used
 to adjust the size of text on the screen."

> If so, can we come up with a better name for it?

A better name would use different units.  I tend to think of "inches" as 
an angular measurement now :-)

> Even "logical dpi" isn't a totally satisfying name. It does indicate
> that something is going on other counting dots and dividing by length
> in space, but it doesn't give me any help in figuring out what value I
> should provide.

"dpi" is a close as we currently get to a "well understood" metric for 
this value; I doubt very much you'd get anything other than blank stares 
if we used something like "dots per radian" or even "dots per degree".

dpi also has the advantage of using relatively small numbers and mapping 
realtively closely to real dpi for most desktop environments.

> In a reply to the message above, Andrew suggested, "dots per degree
> ?". Is that what we want here?

Yes, mostly.  But not quite -- "degree" depends on distance to the viewer, 
and in environments with multiple viewers, that's not constant.  And you 
want to take the rest of the display environment into account -- 
environments with significant vibration will need larger text; I'm sure 
there are other such examples.

For now, we just need a slider that says "smaller <---> bigger" and a way 
to hook that into applications.

Keith Packard        XFree86 Core Team        HP Cambridge Research Lab


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