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[Octave-bug-tracker] [bug #55226] building doc figures in .png format oc

From: Pantxo Diribarne
Subject: [Octave-bug-tracker] [bug #55226] building doc figures in .png format occasionally fails with error in getframe: unable to retrieve figure pixels
Date: Sat, 15 Dec 2018 05:51:07 -0500 (EST)
User-agent: Mozilla/5.0 (X11; Ubuntu; Linux x86_64; rv:63.0) Gecko/20100101 Firefox/63.0

Follow-up Comment #7, bug #55226 (project octave):

I attached a preliminary cset that makes things work for me. This approach
(creating and destroying graphics widgets synchronously) is really how we
should proceed, I think.

The problem I am facing though is that we need to unlock graphics resources in
the interpreter thread before initializing/finalizing widgets in the GUI
But when unlocking the mutex from the interpreter thread there is currently no
way to know if it was previously locked, and thus should be re-locked after
operations in the GUI thread are complete.

Anyway, the cset.

(file #45671)

Additional Item Attachment:

File name: synchronous_qt.patch           Size:5 KB


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