[PDFBOX-1233] CCITTFaxG31DDecodeInputStream - Extended codes have wrong length

• Type: Bug
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Fix Version/s: 1.7.0
• Assignee: Andreas Lehmkühler
• Reporter: Dave Smith
• Created: 21/Feb/12 13:33
• Updated: 29/May/12 16:21
• Resolved: 11/Mar/12 13:58

Description

When dealing with large fax images there are Extended Make Up Codes.
They are added to the tree as ...

buildUpMakeUp(LONG_MAKE_UP, WHITE_LOOKUP_TREE_ROOT);
buildUpMakeUp(LONG_MAKE_UP, BLACK_LOOKUP_TREE_ROOT);

Accept, the length is 0 based not starting at 1792.

The quick hack is to create a new method so the length of the node is correct

private static void buildUpMakeUpLong(short[] codes,
NonLeafLookupTreeNode root)
{
for (int len = 0, c = codes.length; len < c; len++)

{ LookupTreeNode leaf = new MakeUpTreeNode((len + 28) * 64); addLookupTreeNode(codes[len], root, leaf); }

}

as thus ...

buildUpMakeUpLong(LONG_MAKE_UP, WHITE_LOOKUP_TREE_ROOT);
buildUpMakeUpLong(LONG_MAKE_UP, BLACK_LOOKUP_TREE_ROOT);