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https://issues.apache.org/jira/browse/PDFBOX-5540?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17631841#comment-17631841
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Tilman Hausherr commented on PDFBOX-5540:
-----------------------------------------
proposed change, speculates that if there is an encoding with differences then
the workaround shouldn't be used
{code:java}
if (cmapName.contains("Identity") //
|| ordering.contains("Identity") //
|| COSName.IDENTITY_H.equals(encoding) //
|| COSName.IDENTITY_V.equals(encoding))
{
COSDictionary encodingDict = dict.getCOSDictionary(COSName.ENCODING);
if (encodingDict == null || !encodingDict.containsKey(COSName.DIFFERENCES))
{
// assume that if encoding is identity, then the reverse is also true
cmap = CMapManager.getPredefinedCMap(COSName.IDENTITY_H.getName());
LOG.warn("Using predefined identity CMap instead");
}
} {code}
> export:text creates jibberish / malformed output
> ------------------------------------------------
>
> Key: PDFBOX-5540
> URL: https://issues.apache.org/jira/browse/PDFBOX-5540
> Project: PDFBox
> Issue Type: Bug
> Components: Text extraction
> Affects Versions: 3.0.0 PDFBox
> Environment: Same on Windows, Linux and macOS
> Reporter: Alfons
> Priority: Minor
> Attachments: test.pdf, test.txt
>
>
> Using PDFBox as part of Tika and having issues with some PDFs outputting
> unreadable content. Copying text from Adobe / macOS Preview / Browsers works
> as expected.
> I have also tried "re-encoding" the PDF by editing and saving it with
> Acrobat, thinking it could be an issue with their original PDF creator and
> using pdfbox with different encodings, but output mostly remained unchanged.
> I attached the PDF and text it produces. Running it PDFBox via CLI as follows:
> {code:java}
> root % java -jar pdfbox-app-3.0.0-alpha3.jar export:text -i test.pdf
> Nov 06, 2022 9:12:47 PM org.apache.pdfbox.pdmodel.font.PDFont loadUnicodeCmap
> WARNUNG: Invalid ToUnicode CMap in font
> Nov 06, 2022 9:12:47 PM org.apache.pdfbox.pdmodel.font.PDFont loadUnicodeCmap
> WARNUNG: Using predefined identity CMap instead
> Nov 06, 2022 9:12:47 PM org.apache.pdfbox.pdmodel.font.PDFont loadUnicodeCmap
> WARNUNG: Invalid ToUnicode CMap in font
> Nov 06, 2022 9:12:47 PM org.apache.pdfbox.pdmodel.font.PDFont loadUnicodeCmap
> WARNUNG: Using predefined identity CMap instead
> Nov 06, 2022 9:12:47 PM org.apache.pdfbox.pdmodel.font.PDFont loadUnicodeCmap
> WARNUNG: Invalid ToUnicode CMap in font
> Nov 06, 2022 9:12:47 PM org.apache.pdfbox.pdmodel.font.PDFont loadUnicodeCmap
> WARNUNG: Using predefined identity CMap instead
> Nov 06, 2022 9:12:47 PM org.apache.pdfbox.pdmodel.font.PDFont loadUnicodeCmap
> WARNUNG: Invalid ToUnicode CMap in font
> Nov 06, 2022 9:12:47 PM org.apache.pdfbox.pdmodel.font.PDFont loadUnicodeCmap
> WARNUNG: Using predefined identity CMap instead {code}
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