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--- Comment #1 from Marek Kašík <mkasik(a)redhat.com> 2010-09-10 09:51:26 EDT ---
there are two problems with rendering of the PDF file.
The first one are those question marks instead of letters. These are shown
because there is Unicode replacement character 0xfffd instead of normal unicode
in the PDF. This is shown as the question mark when copied. It is rendered by
poppler correctly because the PDF has embedded font which has the letter but it
doesn't index it by Unicode so it is not possible to get Unicode value of it
when copying the text.
So, this problem is caused by the PDF itself.
The second problem are those dotted circles. These are shown because poppler
evaluate distance of two consecutive letters as too high and insert space
between them. In the case of two letters which should be combined somehow it
shows the circle in the place where it misses something.
This is hard to fix because the fix (changing of constants) could worsen the
behaviour for other PDFs.
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