Bug 119571 – [GTK] Accelerated compositing results in incorrect rendering of the media controllers

• Status: RESOLVED
• Resolution: WORKSFORME
• Component: WebKitGTK

[Andres Gomez Garcia]

When playing some multimedia content in WebKitGtk+ 1 or 2 with accelerated compositing enabled we can see problems on the rendered media controllers.

Incorrect rendering:
$ WebKitBuild/Release/Programs/MiniBrowser ./Tools/iExploder/iexploder-1.7.2/src/media/blank.ogg
$ WebKitBuild/Release/Programs/GtkLauncher --enable-accelerated-compositing=TRUE ./Tools/iExploder/iexploder-1.7.2/src/media/blank.ogg

Correct rendering:
$ WebKitBuild/Release/Programs/GtkLauncher ./Tools/iExploder/iexploder-1.7.2/src/media/blank.ogg

The problems are even more obvious with short media clips.
$ WebKitBuild/Release/Programs/MiniBrowser ./Source/WebKit/gtk/tests/resources/test.ogg

[Andres Gomez Garcia]

Created attachment 208328 [details]
Minibrowser showing the rendering problems in the media controllers with accelerated compositing.

[Andres Gomez Garcia]

Created attachment 208329 [details]
Gtklauncher showing the rendering problems in the media controllers with accelerated compositing.

[Sergio Villar Senin]

I don't get exactly where the problem is. The right part of the control inside the slider?

[Xabier Rodríguez Calvar]

(In reply to comment #3)
> I don't get exactly where the problem is. The right part of the control inside the slider?

The right part of the time slider thumb. It's truncated.

[Zan Dobersek]

FWIW, the slider thumb is painted just fine when the video is shown in an HTML document, through <video>.

[Enrique Ocaña]

I double-checked that accelerated compositing was being used and found that this bug isn't reproducible anymore nowadays.