Il giorno Wed, 8 Oct 2008 14:02:23 -0400 "Luke Roth" <[EMAIL PROTECTED]> ha scritto:
> Hi everybody, > > I've been working on writing an image viewer using GDAL, and I'd like Hi Luke, unfortunately I don't have an answer for you but I would like to ask you some more about the application you are working on. It seems to me it is written in C++, is it? Which is the target platform? Which GUI toolkit are you going to use? Will it be open source? Do you have in mind a particular target about data (optical/SAR images, raster/vector data)? What about meta-data and geographic info? > 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? I hope I'm not too boring. thanks -- Antonio Valentino _______________________________________________ gdal-dev mailing list gdal-dev@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/gdal-dev
