Summary:
make sure the framedata creation/destruction is
completely in updateFrameData, makes easier to track
and possible to use the repaintsblocked logic.
now only one framedata instance should be created at startup.
CCBUG:376754
Test Plan:
* autotests pass, plasma runs ok, crash on 376754 not reproducible anymore
* possible to have a plasmashell session start without the creation of a single svg renderer (startups after the first when the cache is generated)
* on qml profiler, framesvgitem creation is ~12 msecs the first one created, ~2-300 musecs the subsequent ones, seems to be a bit better than before the whole refactor started
* tried against the latest patches that remove the binding loops, still correct rendering and no binding loop
* tried with both empty and existing cache in place
Reviewers: #plasma, davidedmundson
Reviewed By: #plasma, davidedmundson
Subscribers: davidedmundson, plasma-devel, #frameworks
Tags: #frameworks, #plasma
Differential Revision: https://phabricator.kde.org/D4707
2b3e8dfe86