Bug 431523 - Window shadows don't scale with HiDPI
Summary: Window shadows don't scale with HiDPI
Status: ASSIGNED
Alias: None
Product: Breeze
Classification: Plasma
Component: window decoration (show other bugs)
Version: unspecified
Platform: Other Linux
: NOR normal
Target Milestone: ---
Assignee: Janet Blackquill
URL:
Keywords:
Depends on:
Blocks:
 
Reported: 2021-01-12 22:13 UTC by Janet Blackquill
Modified: 2021-01-25 20:52 UTC (History)
1 user (show)

See Also:
Latest Commit:
Version Fixed In:
Sentry Crash Report:

Attachments
Add an attachment

Note You need to log in before you can comment on or make changes to this bug.
Description Janet Blackquill 2021-01-12 22:13:55 UTC 
Self explanatory. Window shadows don't scale with HiDPI.
Comment 1 Vlad Zahorodnii 2021-01-14 11:53:45 UTC 
On a HiDPI setup, decoration shadows will be upscaled using the linear filter. I wonder if there are noticeable differences between hidpi shadows and upscaled shadows.
Comment 2 Janet Blackquill 2021-01-25 20:52:08 UTC 
> On a HiDPI setup, decoration shadows will be upscaled using the linear filter. 

This doesn't seem to be the case. What actually seems to happen is that the shadow is rendered into a buffer at 2x (or whatever the scale factor is) size, but due to missing scale factor information from KWin on X11, the shadow is essentially rendered as a 1x scale shadow on a window of double geometry size.