gwlucastrig commented on pull request #116:
URL: https://github.com/apache/commons-imaging/pull/116#issuecomment-766068067


   I need a bit more time to review this, but one thing occurs to me right 
away.  In the TIFF standard, there are a number of special data formats and 
bit-packing sequences (T4 fax, etc.) that are unique to TIFF and some that are 
similar to other formats.  Also, I am not sure that Commons Imaging supports 
all the TIFF options.  So having an enumerated type specific to the TIFF 
package makes sense for that purpose because it serves as a kind of 
documentation of what is done (values included in the enumeration) and what 
still needs to be done (values not found in the enumeration).   I'm not sure 
about compression type (LZW versus Zip, etc.), but that could be the same kind 
of thing. 
   
   On the other hand, there are other a few options that are common to all or 
many graphics formats (indexed color model versus RGB versus CMYK, etc.).  So I 
would agree that those go in the common package.  


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