I've been looking at how much work it might take to implement a new NITF
compression value (IC=CC and IC=MC) which is basically just ZLIB DEFLATE
encoded blocks.
I'm mostly following the pattern used for JPEG, and its down to the part
where I just need to do the compression:
int
NITFWriteZLIBBlock( GDALDataset *poSrcDS, VSILFILE *fp,
int nBlockXOff, int nBlockYOff,
int nBlockXSize, int nBlockYSize,
GDALProgressFunc pfnProgress, void * pProgressData )
{
CPLDebug("NITF", "nBlockXOff=%d/%d, nBlockYOff=%d/%d",
nBlockXOff, nBlockXSize, nBlockYOff, nBlockYSize);
return true;
}
Before I start to dig around in zlib, is there any support in the RasterIO
level to do this? Anything else I could copy before reimplementing it
poorly?
Brad
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