pamfixtrunc(1) - phpMan

Pamfixtrunc User Manual(0)                                             Pamfixtrunc User Manual(0)



       pamfixtrunc was replaced in Netpbm 10.66 (March 2014) by pamfix(1).

       pamfix  with  a  -truncate  option is the same thing as pamfixtrunc.  But pamfix has other
       options to repair other kinds of corruption.

       Another change that came with Netpbm 10.66 is  that  an  invalid  sample  value  (a  value
       greater  than  the  maxval  the  image declares in its header) is considered by the common
       Netpbm image reading facility (in libnetpbm) to be unreadable, which  means  the  file  is
       essentially truncated.  In older Netpbm, the invalid sample value propagates to the output
       in a program such as pamfixtrunc.  Thus, in older Netpbm a  file  with  100  rows  and  an
       invalid  sample  value  in  the  3rd row would pass through pamfixtrunc unchanged.  But in
       Netpbm 10.66, pamfix -truncate with the same input would produce an output image with only
       2  rows.   While it is not possible in 10.66 to cause pamfix to generate an invalid Netpbm
       image, you can use -clip and -changemaxval options to avoid truncating the file in a  case
       like this.

       You  should  not  make  any  new use of pamfixtrunc and if you modify an existing use, you
       should upgrade to pamfixtrunc.  But note that if you write a program that might have to be
       used with very old Netpbm, pamfixtrunc is the only way to do that.

DOCUMENT SOURCE
       This  manual page was generated by the Netpbm tool 'makeman' from HTML source.  The master
       documentation is at

              http://netpbm.sourceforge.net/doc/pamfixtrunc.html

netpbm documentation                                                   Pamfixtrunc User Manual(0)

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