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https://issues.apache.org/jira/browse/PDFBOX-1400?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13444261#comment-13444261
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Andreas Lehmkühler commented on PDFBOX-1400:
--------------------------------------------

Did you use the resetContext feature when adding the new content?


    /**
     * Create a new PDPage content stream.
     *
     * @param document The document the page is part of.
     * @param sourcePage The page to write the contents to.
     * @param appendContent Indicates whether content will be overwritten. If 
false all previous content is deleted.
     * @param compress Tell if the content stream should compress the page 
contents.
     * @param resetContext Tell if the graphic context should be reseted.
     * @throws IOException If there is an error writing to the page contents.
     */
    public PDPageContentStream( PDDocument document, PDPage sourcePage, boolean 
appendContent, 
            boolean compress, boolean resetContext )
            throws IOException

                
> Polygon objects added to existing page are not shown in Adobe Reader
> --------------------------------------------------------------------
>
>                 Key: PDFBOX-1400
>                 URL: https://issues.apache.org/jira/browse/PDFBOX-1400
>             Project: PDFBox
>          Issue Type: Bug
>    Affects Versions: 1.7.1
>            Reporter: Juraj Lonc
>         Attachments: input.pdf, output.pdf
>
>
> I have PDF file which I tried to draw some polygons to.
> content.setLineWidth(0.3f);
> content.setStrokingColor(Color.RED);
> content.drawPolygon(new float[] {x1, x2, x2, x1}, new float[] {y2, y2, y1, 
> y1});
> I have tested several PDF files. Those polygons are properly shown in Adobe 
> Reader for most of PDF files.
> But there are some PDF files which ignores this and Adobe Reader won't show 
> any polygons that were drawn.

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