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https://issues.apache.org/jira/browse/PDFBOX-2281?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14305198#comment-14305198
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Maruan Sahyoun commented on PDFBOX-2281:
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A quick explanation on 'Invisible' annotations.
The PDF specification describes several standard annotations but the list of
annotations is extensible i.e. one could define new annotation types. The
handling of annotations should be done by an annotation handler and is
implementation specific. This allows to extend the list of annotation types.
>From the spec for 'invisible'
{quote}
If set, do not display the annotation if it does not belong to one of the
standard annotation types and no annotation handler is available. If clear,
display such an unknown annotation using an appearance stream specified by its
appearance dictionary
{quote}
For PDFBox and rendering IMHO
if 'invisible' is SET
- render using the appearance stream
- if there is none and it's a standard annotation generate an appearance stream
with defaults and render that
- if it's not one of the standard annotations don't render it
- maybe provide a mechanism to provide appearance generation for non standard
appearances
if 'invisible' is CLEAR
- render using the appearance stream
But I think we can very much wait until such a document comes up.
> Yellow box shown
> ----------------
>
> Key: PDFBOX-2281
> URL: https://issues.apache.org/jira/browse/PDFBOX-2281
> Project: PDFBox
> Issue Type: Bug
> Components: Rendering
> Affects Versions: 2.0.0
> Reporter: simon steiner
> Assignee: Tilman Hausherr
> Labels: Annotations
> Fix For: 2.0.0
>
> Attachments: PDFBOX-2281-2_unc.pdf, PDFBOX-2281-yellownoprint.pdf,
> image.pdf
>
>
> java -jar ~/pdf-box-svn/app/target/pdfbox-app-2.0.0-SNAPSHOT.jar PDFToImage
> image.pdf
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