Font disregarded in Freetext annotation with default appearance (DA) but without appearance stream (AP)

Submitted by oli..@..den.de

Assigned to poppler-bugs

Link to original bug (#107584)

Description

Created attachment 141117 Test file with freetext annotation without appearance stream

Attached is an example file with a freetext annotation. This annotation has a default appearance (DA) but no appearance stream (AP). Poppler disregards the font of the annotation. While admittedly the file has been constructed by hand-editing (annotating the file in Adobe Reader and then manually removing the /AP part), it is nevertheless a standard-conforming file.

Fixing this issue is a necessary first step towards fixing https://bugs.freedesktop.org/show_bug.cgi?id=81748 .

I attach a preliminary patch which kind-of fixes the issue. 'Kind-of' only, because there are (at least) two issues with it:

• poppler issues

  "Syntax Warning: Unknown font type: '???'"

  from the call to 'GfxFont::makeFont' in Annot.cc:2933

• The text is moved a little bit towards the top of the page (notice how the top part of "This is a test" is cut off).

The fact that poppler renders the text in the wrong color (red instead of black) is a separate bug.

Test file and patch have been written by Tobias Deiminger, who deserves all the praise.

Attachment 141117, "Test file with freetext annotation without appearance stream":
minimal_adobe_noap.pdf