[Webkit-unassigned] [Bug 105158] [Qt][WK1]REGRESSION(r137811): compositing/tiling/crash-huge-layer.html makes the following test crash on 32 bit

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=105158





--- Comment #8 from Huang Dongsung <luxtella at company100.net>  2012-12-17 05:09:36 PST ---
(In reply to comment #7)
> (In reply to comment #6)
> > I think it is a WK1 texture mapper bug instead of REGRESSION(r137811).
> > WK1 texture mapper does not have something like TiledBackingStore, so GraphicsLayerTextureMapper::prepareBackingStore can create tiles until consuming all system memory. However, Coordinated Graphics on WK2 uses TiledBackingStore so it ensures we can not consume memory within some threshold (currently cover rect that is about 9 times of the viewport).
> > In my conclusion, we can not solve this problem until GrahpicsLayerTextureMapper uses TiledBackingStore as a backing store.
> 
> You're right, only WK1 uses TextureMapperTiledBackingStore. Darn.

Yes, right!

If we can fix this bug via TiledBackingStore, I think it is convenient to skip this layout test until Bug 102994 completes.
I'm working on Bug 102994 to enable Coordinated Graphics in WK1 QT. Bug 102994 can fix this bug as well as increase CSS Animations performance as running AC off the main thread. I want Qt maintainers to like our plan in Bug 102994. If you implement and review together, I'll be very glad :)

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