Xft and XCursor

[Lukas Sommer]

Thanks for the fast reply :-)

If I understand you correctly, XCursor and Xft will be dropped and replaced
by something different?

Xft is also important because it provides the custom font families and font
sizes that the user has choosen. It's DPI value defaults to the native X
server dpi value, which is normally 96 dpi, a simple convenience value,
which in today's usage doesn't make much sense.

The point is that you can force a custom font dpi value. This way you have
an easy way to scale your user interface. Example: Set the font dpi value to
192 dpi and you see everything scaled with factor 2 (well, at least the
fonts. If the use an application with a scalable widget style, than also the
other UI elements.) Now: XCursor by default chooses the cursor size
automatically depending on the font dpi. This is a very nice behavior (and
IMHO important on the way to more resolution-independent desptops). Will
this still be possible in Wayland?

Lukas Sommer


2011/6/17 Michal Suchanek <hramrach at centrum.cz>

> On 17 June 2011 10:29, Lukas Sommer <sommerluk at gmail.com> wrote:
> > Hello.
> >
> > About Wayland I have the following questions:
> >
> > When we run, in some future, a Wayland-only session, how will
> > Wayland-enabled applications behave in the following things:
> >
> > - Xft: How to retrieve the font DPI setting and how to determine which
> font
> > at which size will be used?
> >
> > - XCursor: Will the X11 cursor themes work on Wayland or will there be a
> > different standard? How can we configure it?
> >
> > Currently, I'm taking a look at KDE configuration and how to set the font
> > DPI and how to change the cursor size. Will this still work in Wayland or
> do
> > we need to reimplement it?
>
> It will definitely have to be reimplemented, at the very least to read
> the settings from Wayland and not X.
>
> Cursors are likely trivial.
>
> However, DPI is a problem. I am not sure Wyaland even handles DPI in
> any way at this point.
>
> One problem is that DPI (and RGB order or even the available color
> components) may vary in different parts of the display (eg. in
> multiscreen configuration). X and current Xft uses don't account for
> this.
>
> Thanks
>
> Michal
>
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