[Webkit-unassigned] [Bug 22891] Scrolling in Windows Cairo Broken if no background color set.

bugzilla-daemon at webkit.org bugzilla-daemon at webkit.org
Fri Feb 6 11:42:50 PST 2009


------- Comment #13 from bfulgham at webkit.org  2009-02-06 11:42 PDT -------
Actually, I don't see how this could be caused by flipping of the context
because when a background color is set, the scrolling problem goes away.  If it
was purely a context orientation issue, I don't see how this simple difference
would make the issue go away.

I played with flipping the cairo_matrix for the DC in GraphicsContextCairo, but
this just created a flipped view of the web page, which still suffered from the
tearing problem.  I did not try adjusting the bitmap region in the WebView code
because I stopped thinking that this issue is related to the transform matrix
since the presence of background color yields a correct scroll.

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