Bug 51336 – [Qt] Regression, buttons and input fields are black in Symbian

• Component: Layout and Rendering
• Status: RESOLVED WORKSFORME

[Janne Koskinen]

Regression caused by http://trac.webkit.org/changeset/71920

After http://gitorious.org/webkit/qtwebkit/commit/1453361 to QtWebkit2.1 buttons and input fields are shows only black and no text is visible in Symbian^3 devices.
See attached screenshot.

Fixes to https://bugs.webkit.org/show_bug.cgi?id=48198 need to be reverted from QtWebkit2.1 or symptoms fixed.

This is 100% reproducible using Qt configuration that is used to build Symbian^3 phone images and QtWebkit2.1 in default symbian config.

---configure.cache----
-platform 
win32-g++ 
-xplatform 
symbian-sbsv2 
-opensource 
-confirm-license 
-openvg 
-opengl-es-2 
-script 
-no-scripttools 
-no-webkit 
-make 
make 
-graphicssystem 
openvg 
-no-phonon-backend 
-usedeffiles 
-dont-process 
-nomake 
examples 
-nomake 
demos 
-nomake 
tools 
-audio-backend 
-fpu 
softvfp+vfpv2

[Janne Koskinen]

Created attachment 77003 [details]
screenshot of the issue

[Janne Koskinen]

Created attachment 77004 [details]
test_case

[Janne Koskinen]

Created attachment 77092 [details]
screenshot after reverting

Originating issue is QT-4328 set to block releases.

When reverted the underlying mobile theme looks messy on N8 with OpenVG backend. There is visible drawing artifacts.

[Benjamin Poulain]

This should block which release? 2.1 or 2.2?

[Janne Koskinen]

(In reply to comment #4)
> This should block which release? 2.1 or 2.2?

Are you asking me ? :)
Regression is in 2.1 so for me it would seem obvious choice to revert it there but then it breaks Maemo (source of regression).
If this is not fixed in 2.1 it could be hot-fixed in QTP 2.1 branch to allow testing of weekly releases to continue and move fixing of this to 2.2.

[Janne Koskinen]

Ok I had interesting testing round.

Part 1 The black transparent background issue in with OpenVG backend

N8 W49 and W48 image shows this issue. Issue is gone in W50 image with no changes to QtWebkit2.1 ... So sorry for the noise I guess :S
Waiting for confirmation, but don't go reverting anything without me getting back to this.

Part 2 Drawing artifacts using OpenVG backend

If I call "QtTestBrowser -graphicsystem openvg" you will see the corruption in drawing of the edges that are visible in the screenshot after reverting.
If I call "QtTestBrowser -graphicsystem raster" you don't get those artifacts and
everything looks as it should be.

[Suresh Voruganti]

As the original problem is not seen in Wk50 release, removing this error from the blocker list for Qtwebkit 2.1 release.

[Benjamin Poulain]

Closing the task following Janne's comments. I will reopen if necessary.