Bug 46458 – [Qt] Transparency in QGraphicsWebView is broken on Maemo6 with the OpenGL paint engine

• Status: RESOLVED
• Resolution: DUPLICATE
• Component: New Bugs

[Jarmo Backlund]

The problem is that when we disable QGraphicsItem::ItemCoordinateCache in
ovirunner we will get a black layer on top of the map.

Maemo6, see more QT-3986.

[Tor Arne Vestbø]

Please provide a reduced testcase

[Simon Hausmann]

Re-opening, QT-3986 contains a test-case that reproduces the issue. From the investigation of Alexis and me it is not unlikely to be a WebKit bug or a bug in Qt that is triggered by WebKit. For the moment we assume it's a WebKit bug and it's tracked here. Maemo bz 190777 has additional information.

I'm also adding this to the 2.1 release blocker, but this bug is a regression in 2.1 that does not happen with 2.0.

[Jarmo Backlund]

--- Comment #51 from Kinnunen Kimmo (Nokia) <[e-mail]> 2010-09-30 13:45:16 EEST --- If you run the app with mtf '-graphicsystem raster -software' flag, you can see it works as expected on device. On host + mtf, raster is broken anyway..

Passing -software to a mtf app disables the usage of glwidget for graphicsview.

-graphicsview raster -software -> ok
-software -> not ok
-graphicsview raster -> not ok


Somehow on GL the paint gets black background. Painting with different webkit bg color + alpha does not work, the black rect glows through the translucent bg.

QPalette palette = webView->page()->palette(); palette.setBrush(QPalette::Base, QColor(255,0,0,125));
webView->setPalette(palette);

[Simon Hausmann]

*** This bug has been marked as a duplicate of bug 45509 ***

[Ademar Reis]

marked as duplicated and therefore should not block the release