| Summary: | subpixel rendering disappears inside selection box since upgrading Qt to 4.8rc1 | ||
|---|---|---|---|
| Product: | [I don't know] kde | Reporter: | Victor Gavrish <loonyphoenix> |
| Component: | general | Assignee: | Unassigned bugs mailing-list <unassigned-bugs> |
| Status: | RESOLVED UPSTREAM | ||
| Severity: | normal | CC: | cfeck |
| Priority: | NOR | ||
| Version: | unspecified | ||
| Target Milestone: | --- | ||
| Platform: | Arch Linux | ||
| OS: | Linux | ||
| Latest Commit: | Version Fixed In: | ||
| Attachments: | subpixel rendering disappears. | ||
Which widget style are you using? I cannot reproduce. Ok, things I think might affect this:
1. qtcurve widget style ("flat" preset)
2. slight autohinting in fontconfig
3. droid sans font for interface
4. this might also be a bug of freetype2 with infinality patches that I'm using, although I don't see how it would only affect this specific aspect of KDE
I removed infinality and installed standard freetype2 and I'm still experiencing this. I also tried changing everything else of the above and nothing helps. I tried Oxygen widget style, full TT hinting and DejaVu fonts. Also, subpixel rendering is permanently off in in the kickoff menu, on the taskbar, and on the clock, although I think that was the case even before qt 4.8rc1. Not sure if that's related or not. I cannot reproduce with QtCurve 1.8.9. Does "systemsettings --graphicssystem native" change the rendering? Note that the Plasma texts are rendered to a QImage to apply the shadow effects, so it did not support subpixel hinting even before (there is already a bug about those cases). It does change the rendering (for the uglier), but the issue remains: http://i.imgur.com/zyKpp.png > Note that the Plasma texts are rendered to a QImage to apply the shadow
effects, so it did not support subpixel hinting even before (there is already a
bug about those cases).
It is possible that the bug was present before I upgraded to Qt 4.8rc1.
Okey, I see the problem, it is only visible with animations enabled, I had them disabled via System Settings > Application Appearance > Style > Fine Tuning > Graphical effects. The animation code renders the items to a QPixmap cache, and Qt no longer renders those texts with subpixel antialiasing. For more information, see https://bugreports.qt.nokia.com/browse/QTBUG-22334 Thanks for the workaround :D |
Created attachment 64860 [details] subpixel rendering disappears. Version: unspecified (using KDE 4.7.2) OS: Linux I noticed this happening in System Settings and Dolphin. Reproducible: Didn't try Steps to Reproduce: 1. Install Qt 4.8rc1 2. Open systemsettings. 3. Open kmag. Set zoom to 1:3. 4. Hover the mouse pointer over an item in systemsettings Actual Results: The color fringing visible in kmag disappears. Expected Results: Subpixel rendering all the way.