Review Request: fewer pixmaps created in pixmap transitions

[Aaron Seigo]

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Review request for Plasma.


Summary
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This prevents the creation of new pixmaps as much as possible while doing transition effects at the cost of creating more pixmaps on the fly. It introduces a new property, cache, to PixmapTransition to restore the old behaviour. However, most of our widgets already do caching internally, so the added pixmap copy is just that: a copy. It sits around taking up pixmap memory for no particularly good reason. In the Javascript plasmoid I'm working on, it creates a table with buttons, some 146 buttons, in fact. This drops the Pixmap count from nearly 150 for the same (pixel-wise) button pixmap to 1.

Combined with my commits from last night and a new caching scheme for FrameSvg, creating these buttons has dropped from 6-9 seconds on my machine to 2-3 seconds.


Diffs
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  /trunk/KDE/kdelibs/plasma/animations/pixmaptransition.cpp 1178174 
  /trunk/KDE/kdelibs/plasma/animations/pixmaptransition_p.h 1178174 
  /trunk/KDE/kdelibs/plasma/paintutils.cpp 1178174 

Diff: http://svn.reviewboard.kde.org/r/5406/diff


Testing
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git at coherenttheory.com:plasmoidprogress.git


Thanks,

Aaron

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