GM and raw camera photos

The latest GM 1.3 development snapshot (1.3.020080701) now supports 
loading common raw camera photos as if they were native without having 
the prefix the file name with "dcraw:". This makes it handy for 
indexing photos.  Dcraw is used as before (rather than more 
sophisticated, less portable, software like UFRaw).  I tested it with 
output from many different camera types and it works great.

At the moment 'dcraw' is executed with bare-bones options.  The 
options could be updated to produce linear 16-bit output or use 
different interpolation options.  Advice from experts is appreciated.

Many of the formats are variants of TIFF so prefixing the file name 
with "TIFF:" obtains a thumbnail rather than the full size image.

Bob
======================================
Bob Friesenhahn
[email protected], http://www.simplesystems.org/users/bfriesen/
GraphicsMagick Maintainer,    http://www.GraphicsMagick.org/


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