Bug 77760 – GtkLauncher.exe doesn't draw anything in its webkitwebview

• Component: WebKitGTK
• Status: RESOLVED DUPLICATE

[Kalev Lember]

On Windows, GtkLauncher.exe starts up with two

Gdk-CRITICAL **: IA__gdk_window_create_similar_surface: assertion `GDK_IS_WINDOW (window)' failed

warnings, and doesn't draw anything in its WebKitWebView. This is coming from createSurfaceForBackingStore() in WidgetBackingStoreCairo.cpp, which tries to call gtk_widget_get_window() before the widget is realized.

[Kalev Lember]

Created attachment 125378 [details]
Create the backing store after WebKitWebView is realized

The widget backing store was created in size_allocate() before the
widget was realized. This wasn't a problem for GtkWidgetBackingStoreX11,
but WidgetBackingStoreCairo's constructor needs the widget's GDK window,
which is is created in realize().

Fixes the WebKitWebView not painting on platforms that use
WidgetBackingStoreCairo, e.g. win32.

Gdk-CRITICAL **: IA__gdk_window_create_similar_surface: assertion `GDK_IS_WINDOW (window)' failed

[Martin Robinson]

Comment on attachment 125378 [details]
Create the backing store after WebKitWebView is realized

Please check if my patch at https://bugs.webkit.org/show_bug.cgi?id=77743 fixes this issue. It should delay the backing store creation until mapping.

[Kalev Lember]

I can confirm that the patch in bug 77743 also fixes it, thanks!

*** This bug has been marked as a duplicate of bug 77743 ***