[Webkit-unassigned] [Bug 25645] SVG - overflow for big sized elements

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=25645





--- Comment #14 from David Yonge-Mallo <davinci at chromium.org>  2010-03-25 08:55:04 PST ---
(In reply to comment #12)
> I'd argue that dimensions that overflow a long long are not going to be
> encountered in normal content.
> Agreed on the size of exponent.

Nothing is really gained by using long long for the representation of the
integer portion of the coordinate.  I think any precision gained in doing so is
lost in the subsequent conversion back into FloatType.

(In reply to comment #13)
> I wonder if ConformingHighQualitySVGViewers:
> http://www.w3.org/TR/SVG11/conform.html#ConformingHighQualitySVGViewers
> has any relation to anything here.

The relevant part would be: "Both a Conforming High-Quality Static SVG Viewer
and a Conforming High-Quality Dynamic SVG Viewer must support the following
additional features: ... At least double-precision floating point computation
on coordinate system transformation numerical calculations."

Does WebKit aim to be a Conforming "High-Quality" SVG Viewer?  If so, then
FloatType needs to be double rather than float, which would affect many things
other than this bug.

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