The short answer is that no setting the property on individual
elements is not more efficient.
The big difference comes between using 'fill-opacity' and 'opacity'.
You need to be aware that in some cases the rendering result can be
quite different. If a group with 'opacity="0.5"' has two overlapping
rectangles the overlap region will have the same opacity as the
non-overlap regions of the rectangles. However a group with
'fill-opacity="0.5"' and the same two rectangles will have 75%
opacity in the overlap region (the first rectangle will block 50% the
second will block 50% of what's left).
ok, I remember that you explained group opacity a few months before. In
my case the elements within the group don't overlap, so this is not an
issue. I will use fill-opacity on the parent group as you suggested.
Also I realized that the interface we use to draw to PDF does
not allow us to easily specify the group opacity case so even if
PDF does support it (which the more I think about it, it probably
does) it would be quite difficult for us to generate...
ok.
Thanks again. I will report on my progress.
Andreas
--
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Andreas Neumann
Institute of Cartography
ETH Zurich
Wolfgang-Paulistrasse 15
CH-8093 Zurich, Switzerland
Phone: ++41-44-633 3031, Fax: ++41-44-633 1153
e-mail: [EMAIL PROTECTED]
www: http://www.carto.net/neumann/
SVG.Open: http://www.svgopen.org/
Carto.net: http://www.carto.net/
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