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August 2008

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2008.08.04 21:24 "Pre-compressing tiles?", by David Hoerl

I'm trying to save massive tiff files on Mac OSX. The machine has 8 
cores on it, and it occurred to me that if I used multiple threads to 
precompress each tile, that I could then (in the primary thread) save 
the tiles (one at a time) using TIFFWriteRawTile.

Although this seems like at least one intended use, not sure - maybe 
its just for copying compressed tiles from one image to another?

My plan is to compress the tiles using COMPRESSION_LZW with 
horizontal prediction.

Is there some facility in the library to just compress a tile?

If so, can I call it from multiple threads?

Thanks

David