| Summary: | PDF font substitution error, libcairo 1.12 | ||
|---|---|---|---|
| Product: | cairo | Reporter: | Michael Adams <unquietwiki> |
| Component: | pdf backend | Assignee: | Adrian Johnson <ajohnson> |
| Status: | RESOLVED NOTABUG | QA Contact: | cairo-bugs mailing list <cairo-bugs> |
| Severity: | major | ||
| Priority: | medium | ||
| Version: | 1.12.0 | ||
| Hardware: | x86 (IA32) | ||
| OS: | Linux (All) | ||
| Whiteboard: | |||
| i915 platform: | i915 features: | ||
| Attachments: | Test PDF | ||
|
Description
Michael Adams
2012-07-19 21:56:11 UTC
Can you attach the pdf file that reproduces the bug. Created attachment 64470 [details]
Test PDF
Test contract from the production system we use; this was saved via Adobe Reader X.
The original pdf contains the following fonts: $ pdffonts bug52280.pdf name type encoding emb sub uni object ID ------------------------------------ ----------------- ---------------- --- --- --- --------- Arial,Bold CID TrueType Identity-H no no no 103 0 Arial CID TrueType Identity-H no no no 104 0 Arial-BoldMT TrueType WinAnsi no no no 105 0 ArialMT TrueType WinAnsi no no no 106 0 Helvetica-Bold Type 1 Custom no no no 2 0 Helvetica Type 1 Custom no no no 4 0 Helvetica Type 1 Custom no no no 154 0 Helvetica Type 1 Custom no no no 150 0 None of the fonts are embedded. So poppler will substitute the fonts. The substituted fonts are: $ pdffonts -subst bug52280.pdf name object ID substitute font substitute font file ------------------------------------ --------- ------------------------------------ ------------------------------------ Arial,Bold 103 0 Liberation Sans Bold /usr/share/fonts/truetype/liberation/LiberationSans-Bold.ttf Arial 104 0 Liberation Sans /usr/share/fonts/truetype/liberation/LiberationSans-Regular.ttf Arial-BoldMT 105 0 Liberation Sans Bold /usr/share/fonts/truetype/liberation/LiberationSans-Bold.ttf ArialMT 106 0 Liberation Sans /usr/share/fonts/truetype/liberation/LiberationSans-Regular.ttf Helvetica-Bold 2 0 Nimbus Sans L Bold /usr/share/fonts/X11/Type1/n019004l.pfb Helvetica 4 0 Nimbus Sans L /usr/share/fonts/X11/Type1/n019003l.pfb Helvetica 154 0 Nimbus Sans L /usr/share/fonts/X11/Type1/n019003l.pfb Helvetica 150 0 Nimbus Sans L /usr/share/fonts/X11/Type1/n019003l.pfb Poppler will substitute the Helvetica fonts with Nimbus Sans. When rendering the pdf to pdf with pdftocairo cairo will embed the substituted fonts in the output pdf. Note that cairo does not support creating pdf files with non embedded fonts. $ pdftocairo -pdf bug52280.pdf out.pdf $ pdfinfo out.pdf Creator: cairo 1.12.3 (http://cairographics.org) Producer: cairo 1.12.3 (http://cairographics.org) Tagged: no Pages: 1 Encrypted: no Page size: 612 x 1008 pts File size: 47914 bytes Optimized: no PDF version: 1.5 $ pdffonts out.pdf name type encoding emb sub uni object ID ------------------------------------ ----------------- ---------------- --- --- --- --------- JWYQNF+LiberationSans-Bold TrueType WinAnsi yes yes yes 5 0 FQNIOC+LiberationSans TrueType WinAnsi yes yes yes 6 0 EXPAHP+NimbusSanL-Bold Type 1 WinAnsi yes yes yes 7 0 BKHCZG+NimbusSanL-Regu Type 1 WinAnsi yes yes yes 8 0 This is all working correctly. The output pdf displays correctly in acroread and evince. The three identical Nimbus fonts have been merged into one. Testing with cairo 1.10.2: $ pdftocairo -pdf bug52280.pdf out.pdf $ pdfinfo out.pdf Creator: cairo 1.10.2 (http://cairographics.org) Producer: cairo 1.10.2 (http://cairographics.org) Tagged: no Pages: 1 Encrypted: no Page size: 612 x 1008 pts File size: 91922 bytes Optimized: no PDF version: 1.5 $ pdffonts out.pdf name type encoding emb sub uni object ID ------------------------------------ ----------------- ---------------- --- --- --- --------- JWYQNF+LiberationSans-Bold CID TrueType Identity-H yes yes yes 5 0 FMRFXL+LiberationSans CID TrueType Identity-H yes yes yes 6 0 VGBHBI+NimbusSansL Type 1 Builtin yes yes yes 7 0 LBBITE+NimbusSansL Type 1 Builtin yes yes yes 8 0 Again the Nimbus Sans fonts are embedded. The difference in encoding is due to a change in the way cairo 1.12 does the font subsetting. There is no difference in the rendering of the 1.10 output in acroread or evince compared to 1.12. The missing '-Bold' and '-Regular' from the Nimbus Sans font names is due to a change in how cairo extracts the font name from Type 1 fonts. In cairo 1.10 it was using the family name. In cairo 1.12 it uses the full name. |
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