1Image::ExifTool::Fixup(U3s)er Contributed Perl DocumentatIimoange::ExifTool::Fixup(3)
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NAME

6       Image::ExifTool::Fixup - Utility to handle pointer fixups
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SYNOPSIS

9           use Image::ExifTool::Fixup;
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11           $fixup = new Image::ExifTool::Fixup;
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13           # add a new fixup to a pointer at the specified offset in data
14           $fixup->AddFixup($offset);
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16           # add a new Fixup object to the tree
17           $fixup->AddFixup($subFixup);
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19           $fixup->{Start} += $shift1;   # shift pointer offsets and values
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21           $fixup->{Shift} += $shift2;   # shift pointer values only
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23           # recursively apply fixups to the specified data
24           $fixup->ApplyFixups(\$data);
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26           $fixup->Dump();               # dump debugging information
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DESCRIPTION

29       This module contains the code to keep track of pointers in memory and
30       to shift these pointers as required.  It is used by ExifTool to main‐
31       tain the pointers in image file directories (IFD's).
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NOTES

34       Keeps track of pointers with different byte ordering, and relies on
35       Image::ExifTool::GetByteOrder() to determine the current byte ordering
36       when adding new pointers to a fixup.
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38       Maintains a hierarchical list of fixups so that the whole hierarchy can
39       be shifted by a simple shift at the base.  Hierarchy is collapsed to a
40       linear list when ApplyFixups() is called.
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AUTHOR

43       Copyright 2003-2007, Phil Harvey (phil at owl.phy.queensu.ca)
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45       This library is free software; you can redistribute it and/or modify it
46       under the same terms as Perl itself.
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SEE ALSO

49       Image::ExifTool(3pm)
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53perl v5.8.8                       2007-09-12         Image::ExifTool::Fixup(3)
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