Tilman Hausherr created PDFBOX-2570:
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Summary: ClassCastException in PDCalGray: COSFloat cannot be cast
to COSArray
Key: PDFBOX-2570
URL: https://issues.apache.org/jira/browse/PDFBOX-2570
Project: PDFBox
Issue Type: Bug
Components: Parsing
Affects Versions: 2.0.0
Reporter: Tilman Hausherr
Assignee: Tilman Hausherr
Fix For: 2.0.0
{code}
INFORMATION: Rendering: PDFBOX-1724.pdf
java.lang.ClassCastException: org.apache.pdfbox.cos.COSFloat cannot be cast to
org.apache.pdfbox.cos.COSArray
at
org.apache.pdfbox.pdmodel.graphics.color.PDCalRGB.getGamma(PDCalRGB.java:158)
at
org.apache.pdfbox.pdmodel.graphics.color.PDCalRGB.toRGB(PDCalRGB.java:95)
at
org.apache.pdfbox.pdmodel.graphics.color.PDCalGray.toRGB(PDCalGray.java:81)
at
org.apache.pdfbox.pdmodel.graphics.color.PDCIEBasedColorSpace.toRGBImage(PDCIEBasedColorSpace.java:88)
{code}
The cause is that in one of the redesigns it was overseen that the Gamma is a
single value for CalGray, and not an array like in CalRGB. Thus PDCalGray
cannot be extended from PDCalRGB. The bug didn't have an effect because the
gamma wasn't used before PDFBOX-2553. Instead I will extend it from
PDCIEBasedColorSpace or from a new abstract class PDCalBasedColorSpace.
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