[Webkit-unassigned] [Bug 45423] [Gtk] Port tiled backing store

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=45423





--- Comment #26 from Joone Hur <joone at kldp.org>  2011-01-12 07:57:46 PST ---
(In reply to comment #25)
> (From update of attachment 78366 [details])
> View in context: https://bugs.webkit.org/attachment.cgi?id=78366&action=review
> 
> I would try to remove the trailing whitespaces in the files.
> 
> I've tested it and seen some visual issues: the left upper tile is not cleaned in some situation when loading a new page (search in google, open a webpage), scrolling has some issues in slashdot with the floating bar in the bottom.

Yes, the left or right side of tiles are not updated immediately in some case. 
Slashdot site seems to use CSS fixed positioning, but it doesn't work with the tiled backing store. I already commented this issue in the API document.

> > Source/WebCore/platform/graphics/gtk/TileGtk.cpp:160
> > +void Tile::swapBackBufferToFront()
> > +{
> > +}
> 
> Why swapping the buffers is not implemented?

Currently, the back buffer doesn't need to be implemented. In the case of QWebKit, it has the front & back buffer, but all buffers are updated synchronously at the same time so there is no real need to have separate back and front buffers.

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