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https://issues.apache.org/jira/browse/PDFBOX-3353?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16143014#comment-16143014
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Tilman Hausherr commented on PDFBOX-3353:
-----------------------------------------

That is already there:
{code}
            PDExtendedGraphicsState r0 = new PDExtendedGraphicsState();
            PDExtendedGraphicsState r1 = new PDExtendedGraphicsState();
            r0.setAlphaSourceFlag(false);
            r0.setStrokingAlphaConstant(markupAnnotation.getConstantOpacity());
            
r0.setNonStrokingAlphaConstant(markupAnnotation.getConstantOpacity());
            r1.setAlphaSourceFlag(false);
            r1.getCOSObject().setItem(COSName.BM, COSName.MULTIPLY); //TODO 
PDExtendedGraphicsState.setBlendMode() is missing
            cs.setGraphicsStateParameters(r0);
            cs.setGraphicsStateParameters(r1);
{code}
I removed the /AP from the file you attached and PDFBox displays nothing, and 
yes the BBox is weird. That is because you have a weird rectangle, that is 
almost empty. Adobe fixes that, that is a general weakness in my existing code, 
that I take the rectangle as the truth. See my comment on 20/May/16 18:40.

> Create appearance streams for annotations
> -----------------------------------------
>
>                 Key: PDFBOX-3353
>                 URL: https://issues.apache.org/jira/browse/PDFBOX-3353
>             Project: PDFBox
>          Issue Type: Task
>          Components: PDModel, Rendering
>    Affects Versions: 1.8.12, 2.0.0, 2.0.1, 2.0.2, 3.0.0
>            Reporter: Tilman Hausherr
>              Labels: Annotations
>         Attachments: line_dimension_appearance_stream-noAP.pdf, 
> line_dimension_appearance_stream.pdf, 
> PDFBOX-3353-highlight-noAP-001796-p1.pdf, PDFBOX-3353-highlight-noAP.pdf, 
> showAnnotation-2.java, showAnnotation.java, SquareAnnotations.pdf, 
> text_markup_ap_test.pdf
>
>
> Create appearance streams for annotations when missing.
> I'll start by replacing current code for Ink and Link annotations.
> Good example PDFs:
> http://www.pdfill.com/example/pdf_commenting_new.pdf
> https://github.com/mozilla/pdf.js/issues/6810



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