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xsettingsd: improve automatic DPI detection

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For laptops, we don't want the same as for regular screens.
This commit is contained in:
Vincent Bernat 2020-01-29 23:31:21 +01:00
parent 57af83356b
commit db5f5743b9
1 changed files with 10 additions and 2 deletions
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12
bin/xsettingsd-setup
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@ -7,8 +7,16 @@ xrandr --current \
| sed -n 's/^\([^ ]\{1,\}\)* connected.* \([0-9]\{1,\}\)x.* \([0-9]\{1,\}\)mm x .*/\1 \2 \3/p' \ | sed -n 's/^\([^ ]\{1,\}\)* connected.* \([0-9]\{1,\}\)x.* \([0-9]\{1,\}\)mm x .*/\1 \2 \3/p' \
| while read output pixels mm; do | while read output pixels mm; do
dpi=$(($pixels * 254 / 10 / $mm)) dpi=$(($pixels * 254 / 10 / $mm))
rounded=$(((dpi + 24) / 48 * 48)) # For laptop screens, we need to apply a correction factor
echo "$output: ${dpi}dpi (rounded to ${rounded}dpi)" case $output in
eDP-1|eDP1) corrected=$(($dpi * 96/144)) ;;
*) corrected=$dpi
esac
# Authorized factors: 1, 1.5, 2, 3, 4, ...
rounded=$(((corrected + 24) / 48 * 48))
[ $rounded -gt 192 ] && rounded=$(((corrected + 48) / 96 * 96))
[ $rounded -lt 96 ] && rounded=96
echo "$output: ${dpi}dpi (corrected to ${corrected}dpi, rounded to ${rounded}dpi)" >&2
done done
# Don't try to guess DPI. For a laptop, we don't want the same DPI as # Don't try to guess DPI. For a laptop, we don't want the same DPI as