Bug 209331

Summary:	Kickoff - subpixel font rendering not used in titles
Product:	[Plasma] plasma4	Reporter:	Rich Johnson <rjohnson>
Component:	widget-kickoff	Assignee:	Plasma Bugs List <plasma-bugs>
Status:	RESOLVED INTENTIONAL
Severity:	normal	CC:	aseigo, bgn66922, fisiu82, PJSingh5000, sabonez, taras.puchko
Priority:	NOR
Version:	unspecified
Target Milestone:	---
Platform:	Ubuntu
OS:	Linux
Latest Commit:		Version Fixed In:
Attachments:	kickoff menu with enabled subpixel hinting but text is rendered incorrectly

Description Rich Johnson 2009-10-03 19:58:04 UTC

Version:            (using KDE 4.3.1)
OS:                Linux
Installed from:    Ubuntu Packages

Reported originally in Launchpad at https://bugs.launchpad.net/bugs/377552.
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Ever since I upgraded to KDE 4.3 beta on my Karmic system, the icon titles in Kickoff have been displayed using grayscale anti-aliasing instead of subpixel rendering. The descriptions (smaller, gray text) and the title at the top are properly drawn using subpixel rendering. I have attached a screenshot to demonstrate.

screenshot link:  http://launchpadlibrarian.net/26854763/nosubpixel.png

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The Lancelot widget is correctly rendering the text we noticed. This was even confirmed with users of other distros on IRC as well. I can't check my trunk build as it is currently on the fritz.

Comment 1 Aaron J. Seigo 2009-10-03 20:49:51 UTC

it is using Qt to do the font rendering:

p.drawText(titleRect, Qt::AlignLeft|Qt::AlignVCenter, titleText);

it's not something plasma does special.

Comment 2 Taras Puchko 2009-11-05 19:50:24 UTC

The Task Manager and Folder View widget on Kubuntu also use grayscale, but the Digital Clock and Calculator have lcd-antialiased font.

Maybe they use a different method for drawing text?

Comment 3 David A 2009-11-11 13:06:11 UTC

(In reply to comment #2)
> The Task Manager and Folder View widget on Kubuntu also use grayscale, but the
> Digital Clock and Calculator have lcd-antialiased font.
> 
> Maybe they use a different method for drawing text?

I confirm these bugs in OpenSuSE 11.1, KDE 4.3.3

Maybe this affects font rendering?

http://websvn.kde.org/branches/KDE/4.3/kdebase/workspace/plasma/applets/kickoff/ui/urlitemview.cpp?view=markup

147	        painter->setRenderHint(QPainter::Antialiasing, false);

Comment 4 Fisiu 2010-04-30 14:14:54 UTC

Bug still occurs in openSUSE 11.3 Milestone 6.
Qt: 4.6.2
KDE: 4.4.2

Kickoff menu has missing subpixel hinting (when enabled). Main categories are
fine but all apps and their categories NOT.

Why this bug is set to 'RESOLVED as WONTFIX' while it's not resolved?

Regards,
Mariusz

Comment 5 Fisiu 2010-04-30 14:17:10 UTC

Created attachment 43115 [details]
kickoff menu with enabled subpixel hinting but text is rendered incorrectly

Comment 6 PJSingh5000 2010-05-02 06:19:47 UTC

This is still an issue in KDE 4.4.2 (Kubuntu Lucid Lynx 10.04 x64).

Since this bug is marked as RESOLVED/WONTFIX, would someone advise if we need to open a new bug for this issue?