Luke Roth wrote:
Hi everybody,
I've been working on writing an image viewer using GDAL, and I'd like
to take advantage of the block cache to avoid keeping multiple copies
of things in memory where I can. I'm currently using the
GetLockedBlockRef() function, which works well, but can sometimes lead
to large delays when scrolling around and reading in new data. Is
there any easy way to check to see if a particular block is present in
the cache before trying to read it? I've found the
TryGetLockedBlockRef() function, which I could use to read the data
from the cache, note which blocks are not valid, and go back and read
those blocks in idle time or in a separate thread, but it's protected
and I don't really want to mess with the GDAL class hierarchy if I
don't have to. Is there a straightforward way to do this?
Luke,
I would not be adverse to making this method public instead of protected.
I'd suggest you try out this approach locally and if it accomplishes what
you need file a ticket on the issue - hopefully before GDAL 1.6.0 beta1 is
issued.
Best regards,
--
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I set the clouds in motion - turn up | Frank Warmerdam, [EMAIL PROTECTED]
light and sound - activate the windows | http://pobox.com/~warmerdam
and watch the world go round - Rush | Geospatial Programmer for Rent
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