[Webkit-unassigned] [Bug 77546] [Qt][WK2] Loading cuttherope.ie results in segfault

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=77546





--- Comment #1 from Zalan Bujtas <zbujtas at gmail.com>  2012-02-01 05:41:24 PST ---
ShareableBitmap lacks an additional ref() when (Qt)ShareableBitmap::createImage() is called. ShareableBitmap gets destroyed early because of this missing ref. 
Both Cairo and CG have this ref(), which is balanced at when the associated (shared) data is being freed. see ShareableBitmap::createCairoSurface(). 

Fix: QImage c'tor needs a callback function parameter, which gets called when the associated data is being freed. It enables Qt's ShareableBitmap to introduce ref()/deref() pair similar to Cairo/CG.

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