Thanks Cameron and Thomas for your hints,
Hi Andreas,
Cameron is correct that just starting the JVM from scratch and loading
all the
classes (and running the JIT compiler, etc) can easily represent the
majority
of your rasterizing time. I'll also comment on some of the other points
you raise:
ok, then this is something I will definitely look at. I am new to Tomcat
but will probably find out how to do it.
And I did not see much
difference with using different output formats (png, jpeg, pdf).
If JPEG is about as fast as PDF the really most of your time
is spent bringing the JVM up.
sounds reasonable
With the current SVN version of Batik (not the 1.6 release) images
are rasterized at 300dpi. For many purposes this is a bit high you could
consider lowering the value by setting the KEY_DEVICE_RESOLUTION hint
on the PDF transcoder.
yes, 200 dpi might be enough
have the opacity attribute set. I am pretty sure that PDF also supports
real transparency. Are you planning to support real transparency in PDF
output in the future?
I don't know that PDF supports 'group' opacity, i.e. multiple
elements that need to be rendered to an offscreen opaquely and then
rendered transparently to the main canvas (but I'm no PDF expert so
perhaps it does). If you are only using fill or stroke you should
map the opacity attribute to fill-opacity or stroke-opacity it will be
much more efficient in either case (you might also make an artistic
decision that setting both is satisfactory for your needs).
I am not a pdf expert either. Would have to ask other people.
sounds like a good approach. Currently, I only need fill opacity. But I
set the attribute on the group. Does that matter? Would it be more
efficient to set it on the individual elements instead of the group?
Andreas
--
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Andreas Neumann
Institute of Cartography
ETH Zurich
Wolfgang-Paulistrasse 15
CH-8093 Zurich, Switzerland
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e-mail: [EMAIL PROTECTED]
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