[Poppler-bugs] [Bug 106444] New: pdftocairo -pdf output breaks extracted text

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=106444

            Bug ID: 106444
           Summary: pdftocairo -pdf output breaks extracted text
           Product: poppler
           Version: unspecified
          Hardware: x86-64 (AMD64)
                OS: Linux (All)
            Status: NEW
          Severity: normal
          Priority: medium
         Component: utils
          Assignee: poppler-bugs at lists.freedesktop.org
          Reporter: nopbin+freedeskbugs at gmail.com

Created attachment 139431
  --> https://bugs.freedesktop.org/attachment.cgi?id=139431&action=edit
PDFs, original and outputs from Ubuntu and Mac. Extracted text original and
Ubuntu optimized.

Under Ubuntu 16.04 processing select PDFs with pdftocairo -pdf (both versions
0.41.0 (pkg) and 0.64.0 (src)) results in text extracted from the resulting PDF
to appear as question mark symbols (suggesting a text encoding problem).  The
rendered image output appears correct.

I initially observed the problem with the extracted text when programmatically
processing the text layer when rendered with pdf.js but then confirmed the
behavior looking at the output of pdftotext. (Also when copying text from other
pdf viewers.)

Interestingly when the same PDF is processed on a Mac with pdftocairo (0.64.0)
the output PDFs extracted text appears *correct*.  I am not sure if it is
relevant but in the attached example I do observe some differences in the font
encoding as shown below.


pdffonts from original PDF:

    name                                 type              encoding         emb
sub uni object ID
    ------------------------------------ ----------------- ---------------- ---
--- --- ---------
    FFXDHY+ArialMT                       TrueType          MacRoman         yes
yes no      10  0
    EESSLH+Helvetica                     TrueType          WinAnsi          yes
yes yes      9  0



pdffonts after processing on Ubuntu:

    name                                 type              encoding         emb
sub uni object ID
    ------------------------------------ ----------------- ---------------- ---
--- --- ---------
    DFUWOB+ArialMT                       CID TrueType      Identity-H       yes
yes yes      5  0


pdffonts after processing on Mac:

    name                                 type              encoding         emb
sub uni object ID
    ------------------------------------ ----------------- ---------------- ---
--- --- ---------
    DFUWOB+ArialMT                       TrueType          WinAnsi          yes
yes yes      5  0

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