[jira] [Commented] (PDFBOX-5450) Create Opaque PDFRenderer example

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

    [ https://issues.apache.org/jira/browse/PDFBOX-5450?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17544365#comment-17544365 ] 

Tilman Hausherr commented on PDFBOX-5450:
-----------------------------------------

The license of QZ is LGPL, so I'll reimplement this from scratch based on my own remarks. (The final product will probably look similar)

> Create Opaque PDFRenderer example
> ---------------------------------
>
>                 Key: PDFBOX-5450
>                 URL: https://issues.apache.org/jira/browse/PDFBOX-5450
>             Project: PDFBox
>          Issue Type: Improvement
>    Affects Versions: 2.0.26
>            Reporter: Tilman Hausherr
>            Assignee: Tilman Hausherr
>            Priority: Major
>             Fix For: 2.0.27, 3.0.0 PDFBox
>
>
> To solve the troubles from PDFBOX-4123 (low print quality of PDFs with unneeded transparency groups)
> As mentioned in the mailing list in [this thread|https://lists.apache.org/list?users@pdfbox.apache.org:2022-3]
> {quote}
> Both options are related to transparency groups. These are an extension of XObject forms. I thought about ignoring them, i.e. treat them like ordinary forms.
> So I looked at PDXobject.createXObject(); this one is called by PDResources.getXObject(), which is called by DrawObject.process(). That one class can officially be replaced if you extend PageDrawer and call "addOperator(new DrawObject());" in the constructor; that class should have  a slightly modified code that does NOT call showTransparencyGroup(), but only showForm() (there are 3 DrawObject classes, copy the one in org.apache.pdfbox.contentstream.operator.graphics). You can extend PageDrawer, but you'll have to extend PDFRenderer as well, see class comment of PageDrawer. 
> {quote}
> and implemented by [~tresf] in [this commit|https://github.com/qzind/tray/blob/2a275bb729a3cf4b909fd683fbe23f7c1f8d4c2b/src/qz/printer/action/pdf/OpaquePDFRenderer.java].



--
This message was sent by Atlassian Jira
(v8.20.7#820007)

---------------------------------------------------------------------
To unsubscribe, e-mail: dev-unsubscribe@pdfbox.apache.org
For additional commands, e-mail: dev-help@pdfbox.apache.org