[regression] Viewer image sometimes disappears (becomes black)
Submitted by Jeff F.T.
Assigned to Jeff F.T.
Various ways to reproduce:
- Undock the viewer, click on the timeline ruler. A clip preview image will show in the viewer. Then, click on the viewer window... the image disappears.
- When docking/undocking the viewer, the image sometimes disappears until you seek again.
- Just alt+tab to another window.
I've been unable to find a fault in ViewerWidget so far... I initially thought that the problem might have been in ViewerWidget’s _store_pixbuf method:
self.pixbuf = pixbuf.get_from_drawable(self.window,
0, 0, 0, 0,
assertion `gdk_window_is_viewable (src)' failed
...but commenting out the thing doesn’t fix it.
In ancient times (summer 2012), it was reported by various people (Matas, Leio) that if you selected multiple clips on the timeline and expand "Transformation", sometimes it freezes (Matas said it always freezes if you do it quickly - load, add, click).
We then suspected it might be due to the TransformationBox code, but commenting that out (as of September 2013) did not fix the problem.
Imported from https://bugzilla.gnome.org/show_bug.cgi?id=708088