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https://issues.apache.org/jira/browse/PDFBOX-6080?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=18023604#comment-18023604
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Tilman Hausherr edited comment on PDFBOX-6080 at 9/29/25 6:26 PM:
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Proposed change: in CCITTFaxFilter, add below "if (k == 0)"
{code:java}
if (decodeParms.containsKey(COSName.END_OF_LINE))
{
boolean hasEndOfLine = decodeParms.getBoolean(COSName.END_OF_LINE, false);
type = hasEndOfLine ? TIFFExtension.COMPRESSION_CCITT_T4 :
TIFFExtension.COMPRESSION_CCITT_MODIFIED_HUFFMAN_RLE;
}
else
{
{code}
and add the existing segment into the else part. This means: if the /EndOfLine
value exit, follow it. If it doesn't exist, use the EOL detection.
[~Schmidor]
was (Author: tilman):
Proposed changed: in CCITTFaxFilter, add below "if (k == 0)"
{code:java}
if (decodeParms.containsKey(COSName.END_OF_LINE))
{
boolean hasEndOfLine = decodeParms.getBoolean(COSName.END_OF_LINE, false);
type = hasEndOfLine ? TIFFExtension.COMPRESSION_CCITT_T4 :
TIFFExtension.COMPRESSION_CCITT_MODIFIED_HUFFMAN_RLE;
}
else
{
{code}
and add the existing segment into the else part. This means: if the /EndOfLine
value exit, follow it. If it doesn't exist, use the EOL detection.
[~Schmidor]
> Unknown code in Huffman RLE stream
> ----------------------------------
>
> Key: PDFBOX-6080
> URL: https://issues.apache.org/jira/browse/PDFBOX-6080
> Project: PDFBox
> Issue Type: Bug
> Components: Rendering
> Affects Versions: 2.0.34, 3.0.5 PDFBox
> Reporter: Tilman Hausherr
> Priority: Major
> Labels: regression
> Attachments: PDFBOX-6080.pdf, image-2025-09-29-16-00-37-246.png
>
>
> As reported in the users mailing list
> Unknown code in Huffman RLE stream
> at
> org.apache.pdfbox.filter.CCITTFaxDecoderStream.decodeRun(CCITTFaxDecoderStream.java:384)
> at
> org.apache.pdfbox.filter.CCITTFaxDecoderStream.decode1D(CCITTFaxDecoderStream.java:164)
> at
> org.apache.pdfbox.filter.CCITTFaxDecoderStream.decodeRowType4(CCITTFaxDecoderStream.java:293)
> at
> org.apache.pdfbox.filter.CCITTFaxDecoderStream.decodeRow(CCITTFaxDecoderStream.java:313)
> at
> org.apache.pdfbox.filter.CCITTFaxDecoderStream.fetch(CCITTFaxDecoderStream.java:131)
> at
> org.apache.pdfbox.filter.CCITTFaxDecoderStream.read(CCITTFaxDecoderStream.java:452)
> at
> org.apache.pdfbox.filter.CCITTFaxFilter.readFromDecoderStream(CCITTFaxFilter.java:131)
> at org.apache.pdfbox.filter.CCITTFaxFilter.decode(CCITTFaxFilter.java:109)
> at org.apache.pdfbox.filter.Filter.decode(Filter.java:97)
> at org.apache.pdfbox.filter.Filter.decode(Filter.java:285)
> It worked in 1.8, 2.0.22 (released 19.12.2020) and stopped working in 2.0.23
> (released 18.3.2021). It has never worked in 3.0.
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