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From: "KKP" <karthikpandian@hotmail.com>
To: <tiff@olympiakos.com>
Subject: TIFF Tags modifcation
Date: Fri, 6 Sep 2002 12:02:52 -0500
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 Hi All I am new to TIFF programming and this library. Can anybody =
please help me on this issue

 I will need to manipulate and add some TIFF tags to an existing=20
TIFF.  Will it be sufficient to simply move the existing data to =
accommodate
the new entries and potentially changes in the length of values (I =
realize I
have to update (and potentially move) the directory entries with the new
offsets, as well)?

Also, according to the documentation I have seen, the Value will be =
placed
in the directory entry if it fits in the four bytes otherwise used by =
the
Offset.  Am I correct in assuming that the determination will be based =
on
the value type (i.e. BYTE, SHORT, LONG will be stored in the directory
entry, while (ASCII) strings and RATIONAL values are pointed to by the
Offset?  Did I miss any of the value types?


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	charset="iso-8859-1"
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<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN">
<HTML><HEAD>
<META http-equiv=3DContent-Type content=3D"text/html; =
charset=3Diso-8859-1">
<META content=3D"MSHTML 6.00.2462.0" name=3DGENERATOR>
<STYLE></STYLE>
</HEAD>
<BODY bgColor=3D#ffffff>
<DIV><FONT face=3DArial size=3D2>&nbsp;Hi All I am new to TIFF =
programming and this=20
library. Can anybody please help me on this issue</FONT></DIV>
<DIV>&nbsp;</DIV>
<DIV><FONT face=3DArial size=3D2>&nbsp;I will need to manipulate and add =
some TIFF=20
tags to an existing <BR>TIFF.&nbsp; Will it be sufficient to simply move =
the=20
existing data to accommodate<BR>the new entries and potentially changes =
in the=20
length of values (I realize I<BR>have to update (and potentially move) =
the=20
directory entries with the new<BR>offsets, as well)?</FONT></DIV>
<DIV>&nbsp;</DIV>
<DIV><FONT face=3DArial size=3D2>Also, according to the documentation I =
have seen,=20
the Value will be placed<BR>in the directory entry if it fits in the =
four bytes=20
otherwise used by the<BR>Offset.&nbsp; Am I correct in assuming that the =

determination will be based on<BR>the value type (i.e. BYTE, SHORT, LONG =
will be=20
stored in the directory<BR>entry, while (ASCII) strings and RATIONAL =
values are=20
pointed to by the<BR>Offset?&nbsp; Did I miss any of the value=20
types?<BR></FONT></DIV></BODY></HTML>

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