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Posted to dev@pdfbox.apache.org by "Villu Ruusmann (JIRA)" <ji...@apache.org> on 2010/02/23 22:33:27 UTC

[jira] Created: (PDFBOX-635) Fallback mechanism for broken CFF fonts

Fallback mechanism for broken CFF fonts
---------------------------------------

                 Key: PDFBOX-635
                 URL: https://issues.apache.org/jira/browse/PDFBOX-635
             Project: PDFBox
          Issue Type: Improvement
          Components: PDModel
    Affects Versions: 1.0.1
            Reporter: Villu Ruusmann
         Attachments: PDFBox.patch

PDFBOX-542 has not proven to be sufficiently foolproof for real-world PDF documents.

PDFBox should fallback to a Type1 font with appropriate warning message (this is the default behaviour with PDFBox 0.8.0 and earlier versions) when there is a problem parsing/interpreting a CFF (aka Type1C) font.

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[jira] Commented: (PDFBOX-635) Fallback mechanism for broken CFF fonts

Posted by "Daniel Wilson (JIRA)" <ji...@apache.org>.
    [ https://issues.apache.org/jira/browse/PDFBOX-635?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12837602#action_12837602 ] 

Daniel Wilson commented on PDFBOX-635:
--------------------------------------

Villu,

I entirely agree with the *concept* of this patch -- if the right means of parsing fails, warn and fall back to something less correct that will work.

Reading your patch, I see the warning.  But I don't see the fallback actually occurring.

Does it indeed fall back to a Type1 font?  Could you explain how the code is  doing this?

Thanks!

Daniel

> Fallback mechanism for broken CFF fonts
> ---------------------------------------
>
>                 Key: PDFBOX-635
>                 URL: https://issues.apache.org/jira/browse/PDFBOX-635
>             Project: PDFBox
>          Issue Type: Improvement
>          Components: PDModel
>    Affects Versions: 1.0.1
>            Reporter: Villu Ruusmann
>         Attachments: PDFBox.patch
>
>
> PDFBOX-542 has not proven to be sufficiently foolproof for real-world PDF documents.
> PDFBox should fallback to a Type1 font with appropriate warning message (this is the default behaviour with PDFBox 0.8.0 and earlier versions) when there is a problem parsing/interpreting a CFF (aka Type1C) font.

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[jira] Updated: (PDFBOX-635) Fallback mechanism for broken CFF fonts

Posted by "Villu Ruusmann (JIRA)" <ji...@apache.org>.
     [ https://issues.apache.org/jira/browse/PDFBOX-635?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Villu Ruusmann updated PDFBOX-635:
----------------------------------

    Attachment: PDFBox.patch

> Fallback mechanism for broken CFF fonts
> ---------------------------------------
>
>                 Key: PDFBOX-635
>                 URL: https://issues.apache.org/jira/browse/PDFBOX-635
>             Project: PDFBox
>          Issue Type: Improvement
>          Components: PDModel
>    Affects Versions: 1.0.1
>            Reporter: Villu Ruusmann
>         Attachments: PDFBox.patch
>
>
> PDFBOX-542 has not proven to be sufficiently foolproof for real-world PDF documents.
> PDFBox should fallback to a Type1 font with appropriate warning message (this is the default behaviour with PDFBox 0.8.0 and earlier versions) when there is a problem parsing/interpreting a CFF (aka Type1C) font.

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[jira] Updated: (PDFBOX-635) Fallback mechanism for broken CFF fonts

Posted by "Jukka Zitting (JIRA)" <ji...@apache.org>.
     [ https://issues.apache.org/jira/browse/PDFBOX-635?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Jukka Zitting updated PDFBOX-635:
---------------------------------

    Fix Version/s: 1.1.0

> Fallback mechanism for broken CFF fonts
> ---------------------------------------
>
>                 Key: PDFBOX-635
>                 URL: https://issues.apache.org/jira/browse/PDFBOX-635
>             Project: PDFBox
>          Issue Type: Improvement
>          Components: PDModel
>    Affects Versions: 1.0.0
>            Reporter: Villu Ruusmann
>             Fix For: 1.1.0
>
>         Attachments: PDFBox.patch
>
>
> PDFBOX-542 has not proven to be sufficiently foolproof for real-world PDF documents.
> PDFBox should fallback to a Type1 font with appropriate warning message (this is the default behaviour with PDFBox 0.8.0 and earlier versions) when there is a problem parsing/interpreting a CFF (aka Type1C) font.

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[jira] Commented: (PDFBOX-635) Fallback mechanism for broken CFF fonts

Posted by "Daniel Wilson (JIRA)" <ji...@apache.org>.
    [ https://issues.apache.org/jira/browse/PDFBOX-635?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12837853#action_12837853 ] 

Daniel Wilson commented on PDFBOX-635:
--------------------------------------

Using the file linked in PDFBOX-634 , your patch markedly reduces the errors logged.

I'll incorporate it.  Thanks!

> Fallback mechanism for broken CFF fonts
> ---------------------------------------
>
>                 Key: PDFBOX-635
>                 URL: https://issues.apache.org/jira/browse/PDFBOX-635
>             Project: PDFBox
>          Issue Type: Improvement
>          Components: PDModel
>    Affects Versions: 1.0.1
>            Reporter: Villu Ruusmann
>         Attachments: PDFBox.patch
>
>
> PDFBOX-542 has not proven to be sufficiently foolproof for real-world PDF documents.
> PDFBox should fallback to a Type1 font with appropriate warning message (this is the default behaviour with PDFBox 0.8.0 and earlier versions) when there is a problem parsing/interpreting a CFF (aka Type1C) font.

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[jira] Commented: (PDFBOX-635) Fallback mechanism for broken CFF fonts

Posted by "Villu Ruusmann (JIRA)" <ji...@apache.org>.
    [ https://issues.apache.org/jira/browse/PDFBOX-635?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12837756#action_12837756 ] 

Villu Ruusmann commented on PDFBOX-635:
---------------------------------------

This patch can only be understood if one analyzes it in the context of method org.apache.pdfbox.pdmodel.font.PDFontFactory#createFont(COSDictionary).

Here's an excerpt:

if(cosDictionary.getFontType().equals("Type1")){
  PDFont retvalue = new Type1Font(cosDictionary);
  if(cosDictionary.getFontSubType().equals("Type1C")){
    try {
      retvalue = new Type1CFont(cosDictionary);
    } catch(Exception e){
      log.warn("Cannot create replacement Type1C font, returning original Type1 font");
    }
  }
  return retvalue;
}

> Fallback mechanism for broken CFF fonts
> ---------------------------------------
>
>                 Key: PDFBOX-635
>                 URL: https://issues.apache.org/jira/browse/PDFBOX-635
>             Project: PDFBox
>          Issue Type: Improvement
>          Components: PDModel
>    Affects Versions: 1.0.1
>            Reporter: Villu Ruusmann
>         Attachments: PDFBox.patch
>
>
> PDFBOX-542 has not proven to be sufficiently foolproof for real-world PDF documents.
> PDFBox should fallback to a Type1 font with appropriate warning message (this is the default behaviour with PDFBox 0.8.0 and earlier versions) when there is a problem parsing/interpreting a CFF (aka Type1C) font.

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[jira] Resolved: (PDFBOX-635) Fallback mechanism for broken CFF fonts

Posted by "Daniel Wilson (JIRA)" <ji...@apache.org>.
     [ https://issues.apache.org/jira/browse/PDFBOX-635?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Daniel Wilson resolved PDFBOX-635.
----------------------------------

    Resolution: Fixed

Incorporated patch in revision 915854

> Fallback mechanism for broken CFF fonts
> ---------------------------------------
>
>                 Key: PDFBOX-635
>                 URL: https://issues.apache.org/jira/browse/PDFBOX-635
>             Project: PDFBox
>          Issue Type: Improvement
>          Components: PDModel
>    Affects Versions: 1.0.1
>            Reporter: Villu Ruusmann
>         Attachments: PDFBox.patch
>
>
> PDFBOX-542 has not proven to be sufficiently foolproof for real-world PDF documents.
> PDFBox should fallback to a Type1 font with appropriate warning message (this is the default behaviour with PDFBox 0.8.0 and earlier versions) when there is a problem parsing/interpreting a CFF (aka Type1C) font.

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