Olivier Ceulemans created PDFBOX-1482:
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Summary: Java color spaces returned by PDDeviceN doesn't take tint
transformation into account and type mismatch
Key: PDFBOX-1482
URL: https://issues.apache.org/jira/browse/PDFBOX-1482
Project: PDFBox
Issue Type: Bug
Components: PDModel
Affects Versions: 1.8.0
Environment: Mac OSX mountain lion, JDK 1.7
Reporter: Olivier Ceulemans
A patch to fix this issue is provided. Be sure to review it... this is my first
contribution.
I tried to solve jira issue PDFBOX-1058 (to contribute a bit) and tried to
convert the file referenced in this ticket to images using standard utilities
and I got lots of NullPointerExceptions.
1) These NPE occurs because the java color space returned by the PDDeviceN
doesn't take the tint transformation function into account. When the toRGB
method method of the color space (ColorSpaceCMYK for the pdf file linked to
PDFBOX-1058) is called it returns null because the length of the array is not
of the expected size. This occurs because the tint transformation function is
not called. The provided patch fix this.
2) By debugging this, I also got CastException because I called
get/setColorantName method that were declared to return list of COSBase. In
reality they returned list of Strings. To avoid these kind of errors in the
future, I also introduced generics in the COSArrayList data type. This is also
provided in the patch.
The ticket PDFBOX-1058 is still not fully fixed by the patch. Colors still
looks horrible on some parts. I'm working on it...
However, by applying the patch there is a clear quality improvement (xerox logo
on the upper left part of the first page and wave effect in the middle of the
first page).
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