CODEWITHSUNDEEP
pdf
Victoria
Victoria

Reputation: 505

What is wrong with this PDF file? Some characters are not visible

I'm not a PDF expert, but I decompressed the PDF with PDFtk, and examining the content object (below) I don't see any 3 Tr codes to force the text to be invisible... but the two characters from /F3 do not appear. They are from a subset of SimSun Chinese font. Whole file is here. Can anyone explain why the two characters are not visible?

4 0 obj 
<<
/Length 294
>>
stream
1 0 0 -1 0 450.71 cm
q
1 0 0 -1 0 450.71 cm
BT
0 440.018 Td
/F2 12 Tf
<2122232324> Tj
ET
Q
/DeviceRGB cs
0 0.5019607843137255 0 scn
/Gs1 gs
q
1 0 0 -1 0 450.71 cm
BT
26.66015625 440.402 Td
/F3 12 Tf
<2122> Tj
ET
Q
q
1 0 0 -1 0 450.71 cm
BT
50.66015625 440.018 Td
/F2 12 Tf
<2524262327> Tj
ET
Q

endstream 
endobj

Upvotes: 0

Views: 201

Answers (1)

Jongware
Jongware

Reputation: 22478

The font used by /F3 ("SimSun"/"宋体"; in your file "AAAADO+SimSun") is not correctly embedded: its glyf table is empty.

The glyf table

.. contains information that describes the glyphs in the font in the TrueType outline format. (http://www.microsoft.com/typography/otspec/glyf.htm)

The file does contain the proper text data, so the text itself is readable from the file: "Hello一的World". But since the character forms are missing, there is nothing to display.

Upvotes: 2

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