Bug 1638849

Summary:	[Proposal] Backporting fix for QTBUG-66036 - QTextLayout draw() rendering issues with "some" font sizes
Product:	[Fedora] Fedora	Reporter:	Romain DEP. <rom1dep>
Component:	qt5-qtbase	Assignee:	Than Ngo <than>
Status:	CLOSED ERRATA	QA Contact:	Fedora Extras Quality Assurance <extras-qa>
Severity:	unspecified	Docs Contact:
Priority:	unspecified
Version:	29	CC:	jgrulich, jreznik, rdieter, rom1dep, than
Target Milestone:	---	Keywords:	FutureFeature
Target Release:	---
Hardware:	Unspecified
OS:	Unspecified
Whiteboard:
Fixed In Version:	qt5-qtbase-5.11.1-9.fc29	Doc Type:	If docs needed, set a value
Doc Text:		Story Points:	---
Clone Of:		Environment:
Last Closed:	2018-11-03 00:01:15 UTC	Type:	Bug
Regression:	---	Mount Type:	---
Documentation:	---	CRM:
Verified Versions:		Category:	---
oVirt Team:	---	RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---	Target Upstream Version:
Embargoed:

Description Romain DEP. 2018-10-12 15:20:16 UTC

Description of problem:

Hi-DPI set-ups with fractional scaling seems to be very vulnerable to this rendering issue, which appears to have a trivial fix merged in Qt 5.12 but not in 5.11 (current).

This is a proposal to backport the fix against the current stable version of Qt.

Comment 1 Than Ngo 2018-10-24 09:47:06 UTC

(In reply to Romain DEP. from comment #0)
> Description of problem:
> 
> Hi-DPI set-ups with fractional scaling seems to be very vulnerable to this
> rendering issue, which appears to have a trivial fix merged in Qt 5.12 but
> not in 5.11 (current).
> 
> This is a proposal to backport the fix against the current stable version of
> Qt.

Romain, could you please attach the link to the fix merged in Qt 5.12?
Thanks

Comment 2 Romain DEP. 2018-10-24 17:17:58 UTC

Hi Ngo,

The ticket points to the following review:
https://codereview.qt-project.org/#/c/219804/

hope this gives enough context? Let me know!
Bests,

Comment 3 Than Ngo 2018-10-25 09:28:08 UTC

i backported the fix and commited into master branch. The fix will be merged to f29 branch later. Thanks!

Comment 4 Fedora Update System 2018-10-25 19:54:10 UTC

qt5-qtbase-5.11.1-9.fc29 qt5-qtquickcontrols2-5.11.1-3.fc29 has been submitted as an update to Fedora 29. https://bodhi.fedoraproject.org/updates/FEDORA-2018-1fdfed503a

Comment 5 Fedora Update System 2018-10-31 18:48:48 UTC

qt5-qtbase-5.11.1-9.fc29, qt5-qtquickcontrols2-5.11.1-3.fc29 has been pushed to the Fedora 29 testing repository. If problems still persist, please make note of it in this bug report.
See https://fedoraproject.org/wiki/QA:Updates_Testing for
instructions on how to install test updates.
You can provide feedback for this update here: https://bodhi.fedoraproject.org/updates/FEDORA-2018-1fdfed503a

Comment 6 Fedora Update System 2018-11-03 00:01:15 UTC

qt5-qtbase-5.11.1-9.fc29, qt5-qtquickcontrols2-5.11.1-3.fc29 has been pushed to the Fedora 29 stable repository. If problems still persist, please make note of it in this bug report.