[Webkit-unassigned] [Bug 18694] [CAIRO] Problem with rotation in a given matrix in SVG

[bugzilla-daemon at webkit.org]

http://bugs.webkit.org/show_bug.cgi?id=18694





------- Comment #3 from vbs85 at gmx.de  2008-04-27 23:08 PDT -------
(In reply to comment #2)
> I searched in GraphicsContestCairo and found the method
> void GraphicsContext::concatCTM(const AffineTransform& transform)
> In this method "transform" is changed back to a cairo_matrix_t with
> reinterpret_cast.

You can replace reinterpret_cast:

    const cairo_matrix_t* matrix = reinterpret_cast<const
cairo_matrix_t*>(&transform);
    cairo_transform(cr, matrix);

to

    cairo_matrix_t matrix = cairo_matrix_t(transform);
    cairo_transform(cr, &matrix);

The code don't use reinterpret_cast but it doesn't solve the problem. You still
have to change b to a and a to b in AffineTransform.
I searched through the source-code of webkit with grep and SVG is the only one
that use this method. I shoulnd't be a problem to fix it that way.


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