issue with signature fields in Acrobat

issue with signature fields in Acrobat

[Pablo Rodriguez via ntg-context]

Hi Hans,

I have the following sample:

  \setupinteraction[state=start]
  \starttext
  \startTEXpage[offset=2em]
  \setupfield[ShortLine][horizontal][width=5cm,height=5em]
  \definefield [Email] [signature] [ShortLine]
  \field [Email] [your email]
  \stopTEXpage
  \stoptext

If I sign it with Acrobat Reader, Times New Roman is used instead of
MyriadPro (which is the default font used by Acrobat for signing).

Line 945 from lpdf-fld.lmt contains:

  if #collected > 0 then
      local acroform = pdfdictionary {
          NeedAppearances = pdfmajorversion() == 1 or nil,
          Fields          = pdfreference(pdfflushobject(collected)),
          CO              = fieldsetlist(calculationset),
      }
      if sometext or somefont then
          checkpdfdocencoding()
          if sometext then
              usedfonts.tttf = fontnames.tt.tf
              acroform.DA = "/tttf 12 Tf 0 g"
          end
          acroform.DR = pdfdictionary {
              Font     = registerfonts(),
              Encoding = pdfdocencodingcapsule,
          }
      end
      lpdf.addtocatalog("AcroForm",pdfreference(pdfflushobject(acroform)))
  end

Would it be possible that the second conditional ("if sometext or
somefont") could be only applied if Fields doesn’t refer to signatures?

Otherwise, Acrobat will use the font specified in the dictionary. Among
other things, this breaks PDF/A documents, since the font for the
signature isn’t embedded.

Many thanks for your help,

Pablo
--
http://www.ousia.tk
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