[jira] [Created] (PDFBOX-2570) ClassCastException in PDCalGray: COSFloat cannot be cast to COSArray

["Tilman Hausherr (JIRA)" <ji...@apache.org>]

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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