Algorithm found in EOS 40D */

Algorithm found in EOS 5d Mk III */

based on exiftool's Image::ExifTool::Canon::CanonEv

DNG Images are assumed to be decodable unless explicitly set so */

FIXME: this is very close to SamsungV0Decompressor::computeStripes()

FIXME: this is very close to IiqDecoder::computeSripes()

special factory function to set up internal buffer with copy of passed data. only necessary to create 'fake' TiffEntries (see e.g. RAF)

Crop, so area is positive, and return true, if there is any area left */ This will ensure that bottomright is never on the left/top of the offset */

This will make sure that offset is positive, and make the area smaller if * needed */ This will return true if there is any area left */