[cairo] EPS Font Issues

[mpsuzuki at hiroshima-u.ac.jp]

On Wed, 1 Sep 2010 09:17:46 +0900
mpsuzuki at hiroshima-u.ac.jp wrote:
>On Tue, 31 Aug 2010 14:31:47 -0500
>Jeff Aigner <jaigner at setnine.com> wrote:
>>However when I try to output to EPS, I get the following
>>message when opening the file up in Illustrator:
>>
>>f-0-0-Identity-H:
>>Font not found on the system; missing font has been substituted
>>
>>I've looked all over for what exactly this means. The fonts I've been
>>trying are on both the computer used to generate the EPS, and the
>>computer opening the EPS file. In fact, in the case of TTF files,
>>Illustrator will find the font and "replace" it -- however this doesn't
>>seem to be happening with OTF files.
>
>I'm really unfamiliar with EPS feature coverage of
>Illustrator, so please let me ask a stupid question:
>
>	Illustrator can load embedded TrueType font (which
>	is NOT found in the operating system) from EPS?
>	If it can, what is the `standard' workflow to embed
>	a TrueType into EPS?

Hi,

Just I've tested with Adobe Illustrator CS4.
I embedded DejaVu Sans + DejaVu Serif.

In RDF-formatted metadata part, I can find
their specification as TrueType, like this:
---------------------------------------------
        <xmpTPg:Fonts>
            <rdf:Bag>
               <rdf:li rdf:parseType="Resource">
                  <stFnt:fontName>DejaVuSerif</stFnt:fontName>
                  <stFnt:fontFamily>DejaVu Serif</stFnt:fontFamily>
                  <stFnt:fontFace>Book</stFnt:fontFace>
                  <stFnt:fontType>TrueType</stFnt:fontType>
                  <stFnt:versionString>Version 2.2</stFnt:versionString>
                  <stFnt:composite>False</stFnt:composite>
                  <stFnt:fontFileName>DejaVuSerif.ttf</stFnt:fontFileName>
               </rdf:li>
               <rdf:li rdf:parseType="Resource">
                  <stFnt:fontName>DejaVuSans</stFnt:fontName>
                  <stFnt:fontFamily>DejaVu Sans</stFnt:fontFamily>
                  <stFnt:fontFace>Book</stFnt:fontFace>
                  <stFnt:fontType>TrueType</stFnt:fontType>
                  <stFnt:versionString>Version 2.2</stFnt:versionString>
                  <stFnt:composite>False</stFnt:composite>
                  <stFnt:fontFileName>DejaVuSans.ttf</stFnt:fontFileName>
               </rdf:li>
            </rdf:Bag>
         </xmpTPg:Fonts>
---------------------------------------------

But, the embedded font is not TrueType, it is converted
to PostScript Type1, aslike:
---------------------------------------------
%ADOBeginSubsetFont: DejaVuSans Initial
%ADOt1write: (1.0.24)
%%Copyright: Copyright 2010 Adobe System Incorporated. All rights reserved.
12 dict dup begin
/FontType 1 def
/FontName /DejaVuSans def
/FontInfo 5 dict dup begin
/ItalicAngle 0 def
/FSType 0 def
end def
/PaintType 0 def
/FontMatrix [0.001 0 0 0.001 0 0] def
/Encoding 256 array
0 1 255 {1 index exch /.notdef put} for
dup 32 /space put
...
---------------------------------------------

So, I guess, Illustrator write the referencial info
of the original TrueType, and, subsetted/converted
to PS Type1. I guess Illustrator cannot load embedded
Type42/Type11 font from EPS (I'm not sure if embedded
Type42/Type11 can be loaded from PDF), and reload
the font from the system, out of the document.

--

Yet I've not checked the detail how RDF font list
in EPS works, but EPS output of cairo can generate
an EPS that Illustrator tries to restore the font from
the system, it will be helpful.

Regards,
mpsuzuki