bug#66308: 30.0.50; DocView: Bump default value of doc-view-resolution

[Po Lu]

Björn Bidar <bjorn.bidar@thaodan.de> writes:

> Would it make sense to set the resolution based on the resolution and
> the dpi? Or how is scaling involved here?

Just the display scale: dpyinfo->resx / PT_PER_INCH (in font.h), so long
as the consequent scale doesn't incur an unacceptable increase to disk
usage.

> Should we store this data on Unixes in `$XDG_CACHE_HOME` Instead
> of temp?

Unix systems don't all provide XDG directories, and furthermore, storage
considerations remain relevant there.