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https://issues.apache.org/jira/browse/PDFBOX-4435?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16748196#comment-16748196
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Tres Finocchiaro commented on PDFBOX-4435:
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{quote}_A /ca 0 makes no sense - why not just leave off what you don't want to
see?_
{quote}
That fixed it. Agreed and I've asked the OP to go back to the 3rd party and
ask them to correct this document. This information is very helpful.
{quote}_I can't just drop stuff under the table because I suspect it will
result in rasterization, people couldl get wrong prints._
{quote}
Agreed, I just fear this problem will keep coming back. The quality is so
drastically affected, a workaround would help.
{quote}_That's java that does this._
{quote}
I don't know the details on this but I assume it's not a "bug"? Our users
usually want to avoid rasterization at all costs for reasons mentioned
previously and anything to help that out (upstream bug report with oracle or
downstream workaround from PDFBOX) would certainly help. At this point, we'd
even be open to scraping the PDF content ourselves for "bad" objects, but I
wouldn't even know where to start looking.
> Poor quality printing of PDF label
> ----------------------------------
>
> Key: PDFBOX-4435
> URL: https://issues.apache.org/jira/browse/PDFBOX-4435
> Project: PDFBox
> Issue Type: Bug
> Components: Rendering
> Affects Versions: 2.0.3, 2.0.13, 2.0.14
> Environment: Lubuntu 16.04, GK420d printer, CL-S400DT(Z) printer
> Reporter: David Hancock
> Priority: Major
> Fix For: 2.0.14, 3.0.0 PDFBox
>
> Attachments: before_after.png, comparison.png, label-pdfbox-1-8.jpg,
> label-pdfbox-2-0.jpg, label.pdf, label.png
>
>
> Hello,
> I'm experiencing poor quality printing of PDF courier labels with PDFBox when
> printing from the command line with the following command:
> {noformat}
> java -jar pdfbox-app-*.jar PrintPDF label.pdf
> {noformat}
> This makes scanning the QR code on these labels troublesome.
> I've tried versions 2.0.3, 2.0.13, 2.0.14 (SNAPSHOT) and all produce the same
> quality issue. Interestingly version 1.8.16 does not appear to suffer from
> this issue.
> I have tried 2 different thermal printers, a GK420d and a CITIZEN
> CL-S400DT(Z) and both output the same.
> When printing the label directly from the GNOME document viewer (Evince) the
> label prints clearly on both printers.
> Please find examples of these labels attached.
> Can anything be done to prevent these quality issues?
> Thanks,
> David
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