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Posted to dev@pdfbox.apache.org by Maruan Sahyoun <sa...@fileaffairs.de> on 2014/08/28 18:23:18 UTC

AcroForm fields and appearance stream generation

Hi,

there are cases where a form field doesn’t contain an appearance e.g. when the form was filled and the NeedAppearances flag in the forms dictionary has been set. In such cases for rendering an appearance stream needs to be generated.

Am I right that for PDFBox
# we should respect a NeedAppearances flag when setting a fields value so that we don’t generate an appearance stream in that case
# we shouldn’t generate an appearance stream during the parsing stage if none exists
# we shall generate an appearance stream if non exists when rendering the PDF

BR
Maruan

Re: AcroForm fields and appearance stream generation

Posted by Andreas Lehmkuehler <an...@lehmi.de>.

Hi,

Am 28.08.2014 18:23, schrieb Maruan Sahyoun:
> Hi,
>
> there are cases where a form field doesn’t contain an appearance e.g. when the form was filled and the NeedAppearances flag in the forms dictionary has been set. In such cases for rendering an appearance stream needs to be generated.
>
> Am I right that for PDFBox
> # we should respect a NeedAppearances flag when setting a fields value so that we don’t generate an appearance stream in that case
+1

> # we shouldn’t generate an appearance stream during the parsing stage if none exists
+1

> # we shall generate an appearance stream if non exists when rendering the PDF
+1

> BR
> Maruan

BR
Andreas Lehmkühler