[PATCH v2 app/xrandr] Document that --dpi and --fbmm options set DPI of whole X screen

[Pali Rohár]

On Wednesday 01 November 2017 21:04:17 Giuseppe Bilotta wrote:
> On Wed, Nov 1, 2017 at 11:25 AM, Pali Rohár <pali.rohar at gmail.com> wrote:
> > Hello, can somebody process this my patch?
> >
> > There are no objections for a long time and Walter already reviewed it.
> >
> > On Monday 07 August 2017 18:45:22 walter harms wrote:
> >> Sorry, i had the idea you already got my ack.
> >>
> >> Reviewed-by: Walter Harms wharms at bfs.de
> >>
> >> Am 07.08.2017 12:56, schrieb Pali Rohár:
> >> > walter, any other objections? I fixed problematic parts which you pointed.
> >> >
> >> > On Monday 24 July 2017 20:34:39 Pali Rohár wrote:
> >> >> Explicitly document and make it clear that those options do not change
> >> >> DPI of some monitor output. Also state that these options have no useful
> >> >> meaning for multi-monitor configuration.
> 
> Personally, I disagree with the statement that the core DPI value has
> no useful meaning in multi-monitor configuration.

Hi! I did not write such thing.

The whole documentation is talking about physical size of the X Screen.

There is no "core DPI". There is just resolution of the X Screen and
physical size (in mm) of the X Screen. And IIRC X Server does not report
any value "DPI" for X Screen.

And as I added in patch, that physical size in mm of the X Screen does
not have any coordinate meaning as it does not match any physical
reality of display.

So... now I'm thinking if documentation update by me is really good if
there are already people who interpreted it not in way as I thought :-(

-- 
Pali Rohár
pali.rohar at gmail.com