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Hi!
I have been investigating how OOo handles exporting to PDF in SuSE 10.2. I
was intrigued because it seemed to behave different than what I remembered
from 10.1. The PDF format can embed font definitions in the PDF file, but
supposedly it doesn't embed some fonts it knows about, like "Times-Roman",
saving considerable space. This was not happening. I have discovered that
10.1 and 10.2 handle this quite differently, and I believe it is a bug.
I have done tests using OOo-writer in both SuSE 10.1 and 10.2, using three
fonts: 1) The printer font "Times" (you need to select options/ writer/
compatibility "use printer metrics" to make this font appear). Supposedly,
this font should never be embedded into the PDF file. 2) Truetype "Nimbus
Roman No9 L", a free Times font, and 3) Truetype "Times New Roman", from
Microsoft.
First I export to PDF from inside the OOo writer, then I print to
postscript, finally I convert this .ps to PDF using "ps2pdf14 test.ps",
and compare. The numbers in the table are the filesizes in bytes. I get
the font info from the command "pdffonts test.pdf" (the filesize
corroborating this).
I always use the same "test.odt" file for each test, changing only the
font used in the text (same font for the whole file, but one single letter
bigger point size).
This is the resulting table (watch for line wrap):
| Via OOo | Via ps2pdf14
OOo writer +--------------------------------+--------------------------------
font name | PDF Emb Pdf font name | PS PDF Emb Pdf font name
- - 10.1
-----+--------------------------------+---------------------------------
Times | 2851 No Times-Roman | 10800 2552 No Times-Roman
Nimbus_Roma | 118376 yes 2*NimbusRomNo9L-R | 238186 11577 Yes
NimbusRomNo9L-R
Times_New_R | 39305 yes TimesNewRomanPSMT| 10800 2552 No Times-Roman
| |
- - 10.2
-----+--------------------------------+---------------------------------
Times | 117794 Yes 2*NimbusRomNo9L-R | 238418 11440 Yes
NimbusRomNo9L-R
Nimbus_Roma | 117794 Yes 2*NimbusRomNo9L-R | 238418 11442 Yes
NimbusRomNo9L-R
Times_New_R | 38924 Yes TimesNewRomanPSM| 11035 2419 No Times-Roman
In 10.1 the plain "Times" font (a printer font) is never embedded; this is
correct, IMO.
But in 10.2 OOo always embeds the three fonts. "Times" is embedded as
"NimbusRomNo9L-Regular", which I consider a BUG.
It is curious to note that OOo embeds "Times New Roman" when exporting,
but the info is not included into the .ps file, thus resulting in "ps2pdf
test.ps" not embedding the font - this is peculiar.
It is also interesting to notice that OOo always embeds
"NimbusRomNo9L-Regular" twice, resulting a pdf ten times bigger than the
one generated through command line ps2pdf14.
Plus, in 10.2 I haven't found any font from the times family that OOo
doesn't embeds.
- --
Cheers,
Carlos E.R.
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