[cairo-bugs] [Bug 84952] [PATCH] Recording surface ink extents: difference between two fixed point numbers may overflow before conversion to double

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=84952

--- Comment #1 from Uli Schlachter <psychon at znc.in> ---
Do you happen to have a self-contained example program demonstrating the
problem that you are fixing? Could you provide patches as git commits (google
for git format-patch).

I am not sure about the problem that you are fixing. If the extents are large
enough to overflow the fixed point calculations, wouldn't other code (which
also uses the fixed point numbers) possibly run into the same overflows? So
while I agree that fixing this is a good idea, I am not sure that this actually
means that it becomes safe to use a recording surface with large-ish
coordinates.

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