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From rahee ghurbhurn <g.ra...@gmail.com>
Subject Width of the character "201" .. inconsistent with the width in the PDF dictionary.
Date Fri, 25 Jan 2013 15:09:59 GMT
Hi

I have downloaded the trunk version of PDFBox for PDF/A validation purposes.

The validation process fails with the following error :

3.1.6 : Invalid Font definition, Width of the character "201" in the font
program "AEOQYB+Frutiger-Bold-ANSI"is inconsistent with the width in the
PDF dictionary.

The same PDF file is considered as valid when using Acrobat Pro X

I used FontForge (as described in
https://issues.apache.org/jira/browse/PDFBOX-1259) to check the width of
the caracter and the value is correct 556. The same value is found in the
PDF file.

When running in debug mode I noticed that the CharStringRenderer
constructor is called with  "false" as parameter, meaning that the
charString is not Type1 (Acrobat reader says it is Type1).

When digging further, I found that in the handleCommandType2 method of
CharStringRenderer does not update the width of the character because the
following condition is not met

else if ("endchar".equals(name)) {
            if (numbers.size() == 1 ) {
                setWidth(numbers.get(0));
            }
        }

numbers has an array as value ([556, 171, 158, 69, 194]).
In the handleSequence method of CharStringHandler, the sequence value used
to compute the "numbers " value is [556, 171, 158, 69, 194, [14]]

[14] being the endchar command.

If I change the above condition to

 else if ("endchar".equals(name)) {
           if (numbers.size() % 2 == 1 ) {
               setWidth(numbers.get(0));
           }
       }

The PDF file is considered as valid ... Is there a bug in the code or in
the validation process or in the PDF file ?

Why should be a single character when the endchar command is met ?

The the technical note 5177 (16 march 2000) issued by Adode the correct
"sequence and form of a Type 2 charstring program may be represented as:

w? {hs* vs* cm* hm* mt subpath}? {mt subpath}* endchar
    Where:
    w = width
    hs = hstem or hstemhm command
    vs = vstem or vstemhm command
    cm = cntrmask operator
    hm = hintmask operator
    mt = moveto (i.e. any of the moveto) operators
    subpath = refers to the construction of a subpath (one complete closed
contour), which may include hintmask operators where appropriate.

and the following symbols indicate specific usage:
* zero or more occurrences are allowed
? zero or one occurrences are allowed
+ one or more occurrences are allowed
{ } indicates grouping



The PDF file is attached to this mail and the Caracter 201 is Eacute.

Thanks for your help

Best regards
Rahee

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