[Webkit-unassigned] [Bug 50527] [Qt] Background image rendering is slow

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=50527





--- Comment #12 from Benjamin Poulain <benjamin.poulain at nokia.com>  2010-12-06 08:15:01 PST ---
(In reply to comment #11)
> > I don't understand the coordinates here. Why you start at 0, 0? Why the width is destinationRect.right() - offset.x()? The offset could be bigger than destinationRect.right(), and the result should still be correct.
> 
> Since we translate(offset) a line earlier, this would draw the tile pixmap between the points 
> (offset -> destinationRect.bottomRight()). Maybe I need to write it in a more verbose way :)

The offset should be the offset of the pixmap being rendered. The pattern does not necessary starts at (0, 0).

That is not what you are doing, or I am missing completely what you are doing and yet a more verbose way would be nice :)

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