[
https://issues.apache.org/jira/browse/PDFBOX-854?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12921271#action_12921271
]
Andreas Lehmkühler commented on PDFBOX-854:
-------------------------------------------
The problem is the current transformation matrix (ctm). It is defined for every
page and can't be reset to an user-defined value. Every change to it will be
done by concatenating a new ctm to it (see cm-operator for further details).
The matrix maps positions from user coordinates to device coordinates. In your
case it is among other things used to create a landscape pdf. PDFBox provides a
sample on how to create landscpae pdfs [1].
I don't know any way to get the ctm without parsing the contentstream before
adding further content. Can you attach a iText example pdf? Probably we can
learn from that how to compensate a ctm.
[1]
http://svn.apache.org/viewvc/pdfbox/trunk/pdfbox/src/main/java/org/apache/pdfbox/examples/pdmodel/CreateLandscapePDF.java?view=markup
> PDPageContentStream.drawString() doesn't work with all PDFs
> -----------------------------------------------------------
>
> Key: PDFBOX-854
> URL: https://issues.apache.org/jira/browse/PDFBOX-854
> Project: PDFBox
> Issue Type: Bug
> Components: PDModel
> Affects Versions: 1.3.0
> Environment: JDK 1.6.0_21
> Reporter: MH
> Attachments: Website_A4_Landscape_PDF14.zip
>
>
> I add custom text to misc exsiting PDF files. Now I wondered why my text
> doesn't appear for a specific PDF. It is not encrypted, has the same page
> size and adding Text with iText 2.1.7 works as expected. My code to add text
> is:
> ----------------------------------
> final PDPage page = (PDPage) allPages.get(i);
> final PDPageContentStream contentStream = new
> PDPageContentStream(doc, page, true, false);
> contentStream.beginText();
> contentStream.setFont(font, sizeOfFont);
> contentStream.moveTextPositionByAmount(xf, yf);
> contentStream.drawString(text);
> contentStream.endText();
> contentStream.close();
> ---------------------------------
> I tried to find differences between this PDF and other PDFs. What I noticed:
> the PDF where I can't see the text has a PDF-Version "1.3" and was created by
> "AFPL Ghostscript 8.54". Is there some known issue with PDFBox and such
> "older" PDF formats?
--
This message is automatically generated by JIRA.
-
You can reply to this email to add a comment to the issue online.
