[Poppler-bugs] [Bug 63963] New: pdftops - some fonts are encoded incorrectly in level2 postscript

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=63963

          Priority: medium
            Bug ID: 63963
          Assignee: poppler-bugs at lists.freedesktop.org
           Summary: pdftops - some fonts are encoded incorrectly in level2
                    postscript
          Severity: normal
    Classification: Unclassified
                OS: All
          Reporter: korobkin+lpad at gmail.com
          Hardware: Other
            Status: NEW
           Version: unspecified
         Component: general
           Product: poppler

Created attachment 78523
  --> https://bugs.freedesktop.org/attachment.cgi?id=78523&action=edit
test.pdf - original pdf file

Hi team, 

This sample PDF file, when converted to PS level2 by pdftops 0.22.3, cannot be
processed by a printer or by GhostScript interpreter because it chokes on
embedded fonts and quits with rangecheck error in xyshow function. 

The offending part of PS code is this:

/F9_0 13.3333 Tf
(\012\355)
[13.3333
0] Tj

Nice folks at GhostScript explained to me that after defining the type42 font
/DejaVuSans_00, the ps code then does this:

16 dict begin
/FontName /DejaVuSans def
/FontType 0 def
/FontMatrix [1 0 0 1 0 0] def
/FMapType 2 def
/Encoding [
0
] def
/FDepVector [
/DejaVuSans_00 findfont
] def
FontName currentdict end definefont pop

As you can see, the font has a single dependent font, and it has map
type 2. Map type 2 means the () string passed to show has a font number
and a character number.  So the string (\012\355) means sub-font 10
character 247, hence the rangecheck error.

In the PDF, all of the falls to F0 (Arial) are of the form:

/F0 13.3333 Tf
1 0 0 -1 10 18 Tm
<0035> Tj

but the calls to F1 (DejaVu Sans) look like:

/F1 13.3333 Tf
1 0 0 -1 139 18 Tm
<0AED> Tj

So pdftops is copying the <0AED> literally to (\012\355), but not
embedding enough subfonts.  The other fonts coincidentally all use
glyphs in <0000>--<00FF> and miss the bug.

I'm attaching both PDF and PS files for your consideration.

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