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Image::ExifTool::FixupUser Contributed Perl DocumentaImage::ExifTool::Fixup(3)

NAME
       Image::ExifTool::Fixup -	Utility	to handle pointer fixups

SYNOPSIS
	   use Image::ExifTool::Fixup;

	   $fixup = new	Image::ExifTool::Fixup;

	   # add a new fixup to	a pointer at the specified offset in data
	   $fixup->AddFixup($offset);

	   # add a new Fixup object to the tree
	   $fixup->AddFixup($subFixup);

	   $fixup->{Start} += $shift1;	 # shift pointer offsets and values

	   $fixup->{Shift} += $shift2;	 # shift pointer values	only

	   # recursively apply fixups to the specified data
	   $fixup->ApplyFixups(\$data);

	   $fixup->Dump();		 # dump	debugging information

	   $fixup->IsEmpty();		 # return true if no offsets to	fix

DESCRIPTION
       This module contains the	code to	keep track of pointers in memory and
       to shift	these pointers as required.  It	is used	by ExifTool to
       maintain	the pointers in	image file directories (IFD's).

NOTES
       Keeps track of pointers with different byte ordering, and relies	on
       Image::ExifTool::GetByteOrder() to determine the	current	byte ordering
       when adding new pointers	to a fixup.

       Maintains a hierarchical	list of	fixups so that the whole hierarchy can
       be shifted by a simple shift at the base.  Hierarchy is collapsed to a
       linear list when	ApplyFixups() is called.

AUTHOR
       Copyright 2003-2017, Phil Harvey	(phil at owl.phy.queensu.ca)

       This library is free software; you can redistribute it and/or modify it
       under the same terms as Perl itself.

SEE ALSO
       Image::ExifTool(3pm)

perl v5.24.1			  2017-01-03	     Image::ExifTool::Fixup(3)

NAME | SYNOPSIS | DESCRIPTION | NOTES | AUTHOR | SEE ALSO

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