[PATCH v3 app/xrandr] Document that --dpi and --fbmm options set DPI of whole X screen

[Pali Rohár]

On Monday 12 March 2018 09:19:57 Giuseppe Bilotta wrote:
> On Sat, Mar 10, 2018 at 4:23 PM, Pali Rohár <pali.rohar at gmail.com> 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.
> >
> > Signed-off-by: Pali Rohár <pali.rohar at gmail.com>
> 
> FWIW,
> 
> Reviewed-by: Giuseppe Bilotta <giuseppe.bilotta at gmail.com>

Ok, can you merge this patch?

> > ---
> >  man/xrandr.man | 19 +++++++++++++++----
> >  1 file changed, 15 insertions(+), 4 deletions(-)
> >
> > diff --git a/man/xrandr.man b/man/xrandr.man
> > index aa82724..1291bad 100644
> > --- a/man/xrandr.man
> > +++ b/man/xrandr.man
> > @@ -257,14 +257,25 @@ fit within this size. When this option is not provided, xrandr computes the
> >  smallest screen size that will hold the set of configured outputs; this
> >  option provides a way to override that behaviour.
> >  .IP "\-\-fbmm \fIwidth\fPx\fIheight\fP"
> > -Sets the reported values for the physical size of the screen. Normally,
> > +Sets the value reported as physical size of the X screen as a whole
> > +(union of all configured monitors). In configurations with multiple
> > +monitors with different DPIs, the value has no physical meaning, but
> > +it may be used by some legacy clients which do not support RandR
> > +version 1.2 to compute a reference font scaling. Normally,
> >  xrandr resets the reported physical size values to keep the DPI constant.
> > -This overrides that computation.
> > +This overrides that computation. Default DPI value is 96.
> >  .IP "\-\-dpi \fIdpi\fP"
> >  .IP "\-\-dpi \fIfrom-output\fP"
> > -This also sets the reported physical size values of the screen, it uses either
> > +This also sets the value reported as physical size of the X screen as a whole
> > +(union of all configured monitors). In configurations with multiple
> > +monitors with different DPIs, the value has no physical meaning, but
> > +it may be used by some legacy clients which do not support RandR
> > +version 1.2 to compute a reference font scaling. This option uses either
> >  the specified DPI value, or the DPI of the given output, to compute an appropriate
> > -physical size using whatever pixel size will be set.
> > +physical size using whatever pixel size will be set. Typical values are
> > +the default (96 DPI), the DPI of the only monitor in single-monitor
> > +configurations, or the DPI of the primary monitor in multi-monitor
> > +configurations.
> >  .IP "\-\-newmode \fIname\fP \fImode\fP"
> >  New modelines can be added to the server and then associated with outputs.
> >  This option does the former. The \fImode\fP is specified using the ModeLine
> > --
> > 2.11.0
> >
> 
> 
> 

-- 
Pali Rohár
pali.rohar at gmail.com