NEW 279478
Make FontProxy RefCounted 
https://bugs.webkit.org/show_bug.cgi?id=279478
Summary Make FontProxy RefCounted
Said Abou-Hallawa
Reported 2024-09-10 16:53:37 PDT
CanvasRenderingContext2DBase::drawTextUnchecked() gets a reference to state().fontProxy. If before using this reference, this function changes m_stateStack by calling save() or restore() this reference may be pointing to freed memory. This will happen when Vector::append reallocates the buffer of m_stateStack. Applying filter to the canvas requires save() and restore() to be called when switching the context target.
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Radar WebKit Bug Importer
Comment 1 2024-09-17 16:54:15 PDT
<rdar://problem/136185867>
Said Abou-Hallawa
Comment 2 2024-10-22 09:16:13 PDT
When fixing this bug, please remove the FIXME comment in CanvasRenderingContext2DBase::drawTextUnchecked() and change the code such that it does not refetch the FontProxy after calling CanvasFilterContextSwitcher::create().
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