[Webkit-unassigned] [Bug 26470] [Cairo] Zero-height image pattern Causes Crash on Windows, improper Behavior on GTK

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=26470





------- Comment #6 from bfulgham at webkit.org  2009-06-17 09:46 PDT -------
Running the same test in a Mac OS X Debug build, I can see that the vPhase
calculation also produces a NaN value.  This is eventually processed in the
ImageCG.cpp (Image::drawPattern) method, which works with the NaN as-is, uses
it in the various transform calculations, then uses them to generate the
pattern.

CGPatternCreate seems to handle the NaN matrix without any errors:
matrix = { a = 0.5, b = 0, c = 0, d = 0.5, tx = -nan(0x400000), ty =
-nan(0x400000) } 


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