[jira] [Commented] (PDFBOX-2533) Poor rendering with non-sequential parser

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

    [ https://issues.apache.org/jira/browse/PDFBOX-2533?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14230075#comment-14230075 ] 

Tilman Hausherr commented on PDFBOX-2533:
-----------------------------------------

The cause is a problem with decryption. The decryption in the non-sequential parser doesn't have recursion, while the old one uses the securityHandler, which does have recursion. Two attributes in CIDSystemInfo (Ordering and Registry) are not decrypted.
{code}
712 0 obj<</Subtype/CIDFontType2/FontDescriptor 711 0 R/BaseFont/Batang/W[1[333]4[623]9 10 376 13[291 625 291 375 595]18 26 595 27 28 333 30[625]34[736 708]36[708 734 671 644 740 765 326 425]45[638 894 775 736 654]51[671 625 750 775 750 945 687 685 625]66[541 576 541 576]70[576 365 583 574 289]76[572 291 845 570 583 574]82[574 439 519 359 566 572 808 605 587 500]130[812]499[485]511[522 541]]/CIDSystemInfo<</Supplement 1/Ordering([ }÷Çè)/Registry(Q+`ðÃ)>>/DW 1000/Type/Font>>
endobj
{code}
So either we'd have to add another level, or implement a decryptDictionary method, or use the one from SecurityHandler. (There's probably a reason that we don't...)

> Poor rendering with non-sequential parser
> -----------------------------------------
>
>                 Key: PDFBOX-2533
>                 URL: https://issues.apache.org/jira/browse/PDFBOX-2533
>             Project: PDFBox
>          Issue Type: Bug
>          Components: Parsing
>    Affects Versions: 1.8.8, 2.0.0
>            Reporter: Tilman Hausherr
>         Attachments: 905605.pdf
>
>
> p39 + 40 of the attached file are poorly rendered with the non-Sequential parser. With the old parser, while the glyphs are not perfect, they represent the correct character. This is for 1.8.8.
> In 2.0 the rendering is incorrect, but I didn't test with the old parser because that one is no longer available from the command line.



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