https://bugs.kde.org/show_bug.cgi?id=517534
Bug ID: 517534
Summary: Incorrect Icon Size used if SVG Icon Exists
Classification: Frameworks and Libraries
Product: frameworks-kiconthemes
Version First 6.23.0
Reported In:
Platform: Fedora RPMs
OS: Linux
Status: REPORTED
Severity: normal
Priority: NOR
Component: general
Assignee: [email protected]
Reporter: [email protected]
Target Milestone: ---
Created attachment 190642
--> https://bugs.kde.org/attachment.cgi?id=190642&action=edit
Example screenshot from after this change, showing blurry (almost illegible)
icons.
SUMMARY
With the change to prioritise SVG over PNG icons, Plasma no longer uses PNG
icons /at all/ if an SVG exists, even if the SVG icon is entirely the wrong
size. This breaks icon packs that use a mix of PNG and SVG icons.
The fix mentioned in https://bugs.kde.org/show_bug.cgi?id=516007
(https://invent.kde.org/frameworks/kiconthemes/-/merge_requests/212) would fix
it in the short term - but this isn't an SVG rendering issue, and wouldn't be
fixed by future changes to the QT SVG renderer.
STEPS TO REPRODUCE
Use an icon theme that has both PNG and SVG assets at different sizes
(https://codeberg.org/irasponsible/canberra95 is the exact theme I'm
using/making, but Chicago95 https://github.com/grassmunk/Chicago95 has the same
issue).
OBSERVED RESULT
48px icons are used for all sizes, instead of the appropriate 32px/22px/16px
icons (context dependent). The easiest way to see this is to open Dolphin, but
the same issue occurs in the Panel and in Kickoff. Icons made to be
pixel-perfect become blurred from the scaling. This is very obvious with large
areas of dithering.
EXPECTED RESULT
PNG icons used for the appropriate sizes, and SVG icon used above (or at) 48px,
as defined in index.theme.
This was the observed behaviour prior to 6.23, but I likely just wasn't
noticing that the SVG wasn't being used above 48px (I thought it was just
simply not pixel-perfect, and that was what caused the blur, but now I
recognise it's because the PNG was being used), which was mentioned in
https://bugs.kde.org/show_bug.cgi?id=502273
SOFTWARE/OS VERSIONS
Operating System: Fedora Linux 43
KDE Plasma Version: 6.6.2
KDE Frameworks Version: 6.23.0
Qt Version: 6.10.2
Kernel Version: 6.19.6-200.fc43.x86_64 (64-bit)
Graphics Platform: Wayland
ADDITIONAL INFORMATION
index.theme sets the minsize for icons in the "scalable" folder to 32/48px, but
these icons are being used for 16px, 22px,and 32px regardless.
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