Is this legal?: /(NameOfSomething)

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3 total messages Started by Stephen_Moye Wed, 06 Dec 2006 17:29

#420

Author: Stephen_Moye
Date: Wed, 06 Dec 2006 17:29

33 lines
1683 bytes

An author has sent us some graphics made with a program called "inkscape". The eps file has this coding:

/newlatin1font {findfont dup length dict copy dup
    /Encoding ISOLatin1Encoding put definefont} def

/(Times-Roman-ISOLatin1) /(Times-Roman) newlatin1font

I don't think that I have ever seen parens used in this way before. It seems to produce this error in Distiller (I'm using Distiller 5 on unix):

12:27 prdsgm@snort:/<7>diagrams% still cone-on-square.eps
CID support library initialization completed.

Distilling:
   PS file: cone-on-square.eps (8,832 bytes)

BEGIN MESSAGES: cone-on-square.eps
%%[ Error: Times-Roman-ISOLatin1 not found. Font cannot be embedded. ]%%
%%[ Error: invalidfont; OffendingCommand: findfont ]%%

Stack:
/Font
(Times-Roman-ISOLatin1)
/
(Times-Roman-ISOLatin1)
/

%%[ Flushing: rest of job (to end-of-file) will be ignored ]%%
%%[ Warning: PostScript error. No PDF file produced. ] %%
JOB FAILED: cone-on-square.eps
END MESSAGES: cone-on-square.eps

Time: 0.6 seconds
12:28 prdsgm@snort:/<7>diagrams%

Re: Is this legal?: /(NameOfSomething)

#423

Author: SaGS
Date: Thu, 07 Dec 2006 08:00

33 lines
2414 bytes

<Stephen_Moye@adobeforums.com> wrote in message 
news:3bc27cf3.-1@webcrossing.la2eafNXanI...
> An author has sent us some graphics made with a program called "inkscape". 
> The eps file has this coding:
>
> /newlatin1font {findfont dup length dict copy dup
>    /Encoding ISOLatin1Encoding put definefont} def
>
> /(Times-Roman-ISOLatin1) /(Times-Roman) newlatin1font
> ...
> %%[ Error: Times-Roman-ISOLatin1 not found. Font cannot be embedded. ]%%
> ...

It is legal PostScript, but certainly with a different semantic
than what the code intends.

The "/(Times- ..." line in the code fragment above does the following:

- Push a litteral empty name on the operand stack; "/" by itself
  is legal.
- Push the string "(Times-Roman-ISOLatin1)"; note that "()" are
  delimiters, so there's no need for whitespace between "(" and the
  preceding token.
- Push a second empty litteral name.
- Push the string "(Times-Roman)".
- Execute "newlatin1font". This looks or a font named "Times-Roman",
  reencodes it, then defines a font with an empty name. Note that
  in some circumstances names and strings are interchangable, so
  "(Times-Roman)" can be used instead of "/Times-Roman".
- The 1st "/" and "(Times-Roman-ISOLatin1)" are forgotten on the stack.

A consequence of the above it that no font gets defined with the name
"Times-Roman-ISOLatin1", which later leads to the error you mention.

Re: Is this legal?: /(NameOfSomething)

#424

Author: Stephen_Moye
Date: Thu, 07 Dec 2006 10:50

3 lines
753 bytes

Thank you -- that is very clear indeed.

SGM

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