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https://issues.apache.org/jira/browse/PDFBOX-660?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Villu Ruusmann updated PDFBOX-660:
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Attachment: PDFBox.patch
FontBox.patch
I have prepared a set of patches that appear to solve the problem.
The CFF "FontMatrix" Top DICT entry contains custom scaling values. The CFF
specification suggests 1 to 1'000 scaling, but most CFF font programs in this
document use 4.8828(..) to 10'000 scaling.
I looked for the usages of method PDFont#getFontMatrix() in the codebase and
found only one match in class org.apache.pdfbox.util.PDFStreamEngine, where it
is used to calculate the size of TextPosition instances. So, I added another
usage to class org.apache.pdfbox.pdfviewer.PageDrawer to apply scaling to the
AffineTransformation object that is passed on to the method
PDFont#drawString(String, Graphics, float, AffineTransform, float, float).
I couldn't find the exact description of the FontMatrix object neither from the
CFF nor the Type1 Font specification. I made a wild guess that the X- and
Y-axis should be scaled independently after the first and fourth FontMatrix
element, respectively. Please verify it if you can.
> Failure to Convert this PDF to Image Correctly
> ----------------------------------------------
>
> Key: PDFBOX-660
> URL: https://issues.apache.org/jira/browse/PDFBOX-660
> Project: PDFBox
> Issue Type: Bug
> Affects Versions: 1.0.0
> Environment: Windows 7, Eclipse IDE
> Reporter: Gary Lam
> Priority: Minor
> Attachments: 1.jpg, enroll_California.pdf, FontBox.patch,
> frontpage-fixed.png, PDFBox.patch
>
>
> PDFBox was unable to convert this PDF correctly into an image. I've attached
> the first page of the created image as well as the original PDF.
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