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https://issues.apache.org/jira/browse/PDFBOX-2726?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14376581#comment-14376581
]
Tilman Hausherr edited comment on PDFBOX-2726 at 3/23/15 8:57 PM:
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{code}
/Filter [/JBIG2Decode]
/Height 3755
/Length 57773
/Subtype /Image
/ColorSpace /DeviceGray
/DecodeParms [<<
/Width 1244 0 R
/Height 1245 0 R
/JB2Quality 1246 0 R
/DoHalftoneCoding false
>>]
{code}
I initially thought it is a malformed PDF but it isn't. Because the filter is
in an array, the decodeparms dictionaries are also to be in an array. There's a
method to get the correct item but it wasn't used in the JBIG2Filter for some
reason.
was (Author: tilman):
{code}
/Filter [/JBIG2Decode]
/Height 3755
/Length 57773
/Subtype /Image
/ColorSpace /DeviceGray
/DecodeParms [<<
/Width 1244 0 R
/Height 1245 0 R
/JB2Quality 1246 0 R
/DoHalftoneCoding false
>>]
{code}
I initially thought it is a malformed PDF but it isn't. Because the filter is
in an array, the decodeparms dictionaries are also to be in an array. There's a
method to get the correct item but in 2.0 it isn't used in the JBIG2Filter for
some reason. I haven't investigated 1.8 yet.
> org.apache.pdfbox.cos.COSArray cannot be cast to
> org.apache.pdfbox.cos.COSDictionary
> ------------------------------------------------------------------------------------
>
> Key: PDFBOX-2726
> URL: https://issues.apache.org/jira/browse/PDFBOX-2726
> Project: PDFBox
> Issue Type: Bug
> Affects Versions: 1.8.8, 1.8.9, 2.0.0
> Environment: levigo-jbig2-imageio-1.6.1.jar, jai_codec.jar,
> jai_imageio.jar
> Reporter: Dmitry Andreev
> Assignee: Tilman Hausherr
> Labels: JBIG2
> Attachments: Book_1.Working_project.pdf,
> Book_1.Working_project_1.jpg, PDFBOX-2726.pdf
>
>
> When I start .convertToImage() this error is occur:
> org.apache.pdfbox.pdmodel.graphics.xobject.PDPixelMap getRGBImage
> SEVERE: java.lang.ClassCastException: org.apache.pdfbox.cos.COSArray cannot
> be cast to org.apache.pdfbox.cos.COSDictionary
> java.lang.ClassCastException: org.apache.pdfbox.cos.COSArray cannot be cast
> to org.apache.pdfbox.cos.COSDictionary
> at org.apache.pdfbox.filter.JBIG2Filter.decode(JBIG2Filter.java:73)
> at org.apache.pdfbox.cos.COSStream.doDecode(COSStream.java:351)
> at org.apache.pdfbox.cos.COSStream.doDecode(COSStream.java:299)
> at
> org.apache.pdfbox.cos.COSStream.getUnfilteredStream(COSStream.java:225)
> at
> org.apache.pdfbox.pdmodel.common.PDStream.createInputStream(PDStream.java:232)
> at
> org.apache.pdfbox.pdmodel.common.PDStream.getByteArray(PDStream.java:510)
> at
> org.apache.pdfbox.pdmodel.graphics.xobject.PDPixelMap.getRGBImage(PDPixelMap.java:254)
> at
> org.apache.pdfbox.pdmodel.graphics.xobject.PDXObjectImage.mask(PDXObjectImage.java:221)
> at
> org.apache.pdfbox.pdmodel.graphics.xobject.PDXObjectImage.applyMasks(PDXObjectImage.java:154)
> at
> org.apache.pdfbox.pdmodel.graphics.xobject.PDPixelMap.getRGBImage(PDPixelMap.java:365)
> at
> org.apache.pdfbox.util.operator.pagedrawer.Invoke.process(Invoke.java:87)
> at
> org.apache.pdfbox.util.PDFStreamEngine.processOperator(PDFStreamEngine.java:557)
> at
> org.apache.pdfbox.util.PDFStreamEngine.processSubStream(PDFStreamEngine.java:268)
> at
> org.apache.pdfbox.util.PDFStreamEngine.processSubStream(PDFStreamEngine.java:235)
> at
> org.apache.pdfbox.util.PDFStreamEngine.processStream(PDFStreamEngine.java:215)
> at org.apache.pdfbox.pdfviewer.PageDrawer.drawPage(PageDrawer.java:139)
> at org.apache.pdfbox.pdmodel.PDPage.convertToImage(PDPage.java:801)
> at org.apache.pdfbox.pdmodel.PDPage.convertToImage(PDPage.java:732)
> at com.sign.PDFCutter.PDFCut(PDFCutter.java:75)
> at com.sign.CopyFileTree.visitFile(CopyFileTree.java:103)
> at com.sign.CopyFileTree.visitFile(CopyFileTree.java:21)
> at java.nio.file.Files.walkFileTree(Files.java:2667)
> at java.nio.file.Files.walkFileTree(Files.java:2739)
> at com.sign.Copy.main(Copy.java:158)
> and some resulting images are blank, some images in grey shades with fading
> text
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