[Webkit-unassigned] [Bug 56929] [Qt] Tiled painting still causes synchronous layout when accelerated compositing and texture mapper are enabled

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=56929





--- Comment #5 from Benjamin Poulain <benjamin at webkit.org>  2011-03-25 03:52:52 PST ---
I just had an idea for testing this, you tell me if that works :)

1) have a white page containing a big iframe without border but with scrollbar
2) render the top left corner (let say (0, 0, 100x100), it should only contain white since there is no content inside the iframe
3) resize the iframe programmatically so the scrollbars enter the top left corner
4) change the background color of the mainframe to green
4) re-render the top left rect. Check if all pixels are still white

Without your patch, the scrollbar of iframe will be in the way, over a white background.
With your patch, we should get only the white background.

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