Hey Simone,
I've read through the ArcGrid raster example as well as other
documentation, and I'm pretty clear on why and how to create an ImageIO
plugin. It'll take a little "stretching" of the traditional semantics
of the model to make it fit pulling images from a database, but it seems
that the API was largely designed to do this.
My one question is about this line in ArcGridReader.java:
RenderedOp asciiCoverage = JAI.create("ImageRead", pbjImageRead, hints);
I understand what this does, but I'm just curious as to why you decided
to do it *this* way. Couldn't you have just as easily called this
(assuming that you'd created an appropriate ImageReadParam object)?
readerSPI.createReaderInstance().read(imageIndex, param);
Is that one "JAI" line the "JAI special sauce" that links the whole
thing into the wacky world of JAI? Is that the line that gives you
cached image tiles, stream-able PlanarImages and all the other JAI
goodness that you mentioned in our breakout a while ago (link below)?
http://docs.codehaus.org/display/GEOS/2006/07/27/Breakout+Coverage+Plugin+IRC+meeting+7-27-2006
Not that this really changes any implementation details for me, just
curious about that bit.
Thanks,
--saul
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