On Apr 6, 2009, at 3:04 AM, Eric Seidel wrote:
Dave, Simon (and the larger community): I've been looking at fixing: https://bugs.webkit.org/show_bug.cgi?id=20769 https://bugs.webkit.org/show_bug.cgi?id=14015 in SVG. A large part of the mis-match between SVG renderers and the HTML/CSS rendering tree is the use of transforms. In SVG, transforms (and clipping) are handled by the renderers themselves. the HTML/CSS rendering tree does not handle transforms, and instead only rectilinear layout using parent-offsets. Things which require transforms get a RenderLayer and all the RenderObject methods remain transform-ignorant. Is this currently the long-term plan for transforms? Or will HTML also be moving to a transform aware rendering tree?
I don't think anyone has immediate plans to make every renderer handle arbitrary transforms. What you describe doesn't sound obviously wrong to me; transforms on CSS-rendered elements are rare and likely to be on only a few elements when used, whereas they are quite common for SVG renderers.
To fix these bugs I will need to sorta "hack" how things like outline drawing are done, focus ring invalidation, and repaint rect calculation to take transforms into account inside the renderers.
It might be easier to give useful feedback if you give examples of alternate ways to fix particular bugs.
Regards, Maciej _______________________________________________ webkit-dev mailing list [email protected] http://lists.webkit.org/mailman/listinfo.cgi/webkit-dev
