Understood, thanks for clarifying. So in my algorithm, given I don't modify the form I could use refreshAppearance=true only when the NeedAppearance=true in the form, correct? Andrea
Il giorno lun 13 mag 2019 alle ore 16:26 Maruan Sahyoun < [email protected]> ha scritto: > Hi, > > in theory you should get the same result but the rendering is dependent on > the forms content stream. Letting PDFBox reconstruct > the content stream might leasd to differences compared to Adobe Reader as > the details of formatting content such as text is not > part of the PDF specification. Adobe is using it's own layout model which > is not published so the current state was achieved by > looking at sample PDFs and reworking that. > > I'll look into the PDF provided to get an idea where the difference is > coming from. > > Having said that - as long as you didn't change the form content - using > refreshAppearance=true should't be neccesary when > flattening. > > BR > Maruan > > > Hi, we are having some issue when we try to flatten the form in the file > > f1040_sample.pdf > > We get slightly different results depending on the value of refresh > > appearance, in particular when we set it to true we get a slightly wrong > > positioning of the text field value. > > Shouldn't we expect the same result in both cases? > > This is the test code (PDFBox 2.0.15): > > > > @Test > > public void testFlatten() throws IOException { > > PDDocument testPdf = PDDocument.load(new > > File("/home/torakiki/tmp/delete/f1040_sample.pdf")); > > PDAcroForm form = testPdf.getDocumentCatalog().getAcroForm(); > > List<PDField> fields = new ArrayList<PDField>(); > > > > > fields.add(form.getField("topmostSubform[0].Page1[0].YourSocial[0].f1_04[0]")); > > testPdf.getDocumentCatalog().getAcroForm().flatten(fields, > false); > > File file = new > > File("/home/torakiki/tmp/delete/f1040_sample_pdfbox_no_refresh.pdf"); > > testPdf.save(file); > > } > > > > I isolated the field in the test case but we also get the same result > when > > flattening the whole form, I included the Acrobat version of the > flattened > > pdf. > > If we flatten the whole form with refreshAppearance=false we get pretty > > much the same result as Acrobat, same number From XObjects, but if we > > flatten with refreshAppearance=true we get a lot of Form XObjects (I > guess > > one for each field, even empty ones) and a slightly wrong positioning of > > the text field. > > Could you please help me understand what's the issue here? > > Thanks > > > > Here the files: > > > https://www.dropbox.com/sh/rmywlrmftolvwil/AADcz1Djfe59YAm8ykKnpIN5a?dl=0 > -- > Maruan Sahyoun > > FileAffairs GmbH > Josef-Schappe-Straße 21 > 40882 Ratingen > > Tel: +49 (2102) 89497 88 > Fax: +49 (2102) 89497 91 > [email protected] > www.fileaffairs.de > > Geschäftsführer: Maruan Sahyoun > Handelsregister: AG Düsseldorf, HRB 53837 > UST.-ID: DE248275827 > > > --------------------------------------------------------------------- > To unsubscribe, e-mail: [email protected] > For additional commands, e-mail: [email protected] > >
