postscript problem

postscript problem

[Peter Rolf]

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Hi,

I have a problem with the postscript output of a MP graphic. The
(attached) ps file contains a single blank line, which breaks the
conversion by mptopdf.

[..]
[MP to PDF] (./test-mpgraph.1
Runaway argument?
! Paragraph ended before \handleMPsequence was complete.
<to be read again>
                   \par
l.19

?

The file is converted by mptopdf, if I remove that blank line.
Here is a minimal example.


\setupoutput[pdftex]

\setuppagenumber[state=stop]

\startreusableMPgraphic{foo}
  draw unitsquare xyscaled(4cm,4cm)
  withpen pencircle scaled 1pt
  shifted(1cm,1cm)
   ;
\stopreusableMPgraphic

\starttext
\null
\useMPgraphic{foo}

\stoptext


I've tested it on context live, but the versions of pdftex and metapost
are too old (but work without errors) for any comparison.
Used versions: pdftex 1.40.1, metapost 0.933, context 18.01.2007

Any hints welcome.

Peter

[-- Attachment #2: test-mpgraph.1 --]
[-- Type: application/postscript, Size: 888 bytes --]

[-- Attachment #3: Type: text/plain, Size: 139 bytes --]

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Re: postscript problem

[Taco Hoekwater]

Peter Rolf wrote:
> I've tested it on context live, but the versions of pdftex and metapost
> are too old (but work without errors) for any comparison.
> Used versions: pdftex 1.40.1, metapost 0.933, context 18.01.2007
> 
> Any hints welcome.

looks like a problem in the metapost beta (context depends on metapost
not generating empty lines).

Taco

Re: postscript problem

[Peter Rolf]

Taco Hoekwater wrote:
> 
> Peter Rolf wrote:
>> I've tested it on context live, but the versions of pdftex and metapost
>> are too old (but work without errors) for any comparison.
>> Used versions: pdftex 1.40.1, metapost 0.933, context 18.01.2007
>>
>> Any hints welcome.
> 
> looks like a problem in the metapost beta (context depends on metapost
> not generating empty lines).
>
Thanks for the info. I have "wasted" five hours on this, but I couldn't
find the place, where the line is inserted.

> Taco
> _______________________________________________
> ntg-context mailing list
> ntg-context@ntg.nl
> http://www.ntg.nl/mailman/listinfo/ntg-context
> 

Re: postscript problem

[Taco Hoekwater]

Peter Rolf wrote:
> Taco Hoekwater wrote:
>> Peter Rolf wrote:
>>> I've tested it on context live, but the versions of pdftex and metapost
>>> are too old (but work without errors) for any comparison.
>>> Used versions: pdftex 1.40.1, metapost 0.933, context 18.01.2007
>>>
>>> Any hints welcome.
>> looks like a problem in the metapost beta (context depends on metapost
>> not generating empty lines).
>>
> Thanks for the info. I have "wasted" five hours on this, but I couldn't
> find the place, where the line is inserted.

I'll look this up in the weekend.

Taco

Re: postscript problem

[Peter Rolf]

Taco Hoekwater wrote:
> 
> Peter Rolf wrote:
>> Taco Hoekwater wrote:
>>> Peter Rolf wrote:
>>>> I've tested it on context live, but the versions of pdftex and metapost
>>>> are too old (but work without errors) for any comparison.
>>>> Used versions: pdftex 1.40.1, metapost 0.933, context 18.01.2007
>>>>
>>>> Any hints welcome.
>>> looks like a problem in the metapost beta (context depends on metapost
>>> not generating empty lines).
>>>
>> Thanks for the info. I have "wasted" five hours on this, but I couldn't
>> find the place, where the line is inserted.
> 
> I'll look this up in the weekend.
>
Hi Taco. Any news about it?

Peter

> Taco
> _______________________________________________
> ntg-context mailing list
> ntg-context@ntg.nl
> http://www.ntg.nl/mailman/listinfo/ntg-context
> 

Re: postscript problem

[Mojca Miklavec]

On 2/2/07, Peter Rolf wrote:
> Taco Hoekwater wrote:
> >
> > Peter Rolf wrote:
> >> Taco Hoekwater wrote:
> >>> Peter Rolf wrote:
> >>>> I've tested it on context live, but the versions of pdftex and metapost
> >>>> are too old (but work without errors) for any comparison.
> >>>> Used versions: pdftex 1.40.1, metapost 0.933, context 18.01.2007
> >>>>
> >>>> Any hints welcome.
> >>> looks like a problem in the metapost beta (context depends on metapost
> >>> not generating empty lines).
> >>>
> >> Thanks for the info. I have "wasted" five hours on this, but I couldn't
> >> find the place, where the line is inserted.
> >
> > I'll look this up in the weekend.
> >
> Hi Taco. Any news about it?

Although it probably isn't the answer you were looking for:

yes, there are news, the metapost & pdfTeX versions in the garden are updated ;)

Mojca

Re: postscript problem

[Taco Hoekwater]

Peter Rolf wrote:

>>>>looks like a problem in the metapost beta (context depends on metapost
>>>>not generating empty lines).
>>>>
>>>
>>>Thanks for the info. I have "wasted" five hours on this, but I couldn't
>>>find the place, where the line is inserted.
>>
>>I'll look this up in the weekend.
>>
> 
> Hi Taco. Any news about it?

Found it. There will be a new metapost beta somewhere in the coming
week, with the fix added.

In case anyone is interested right now, the diff is:


Index: src/texk/web2c/psout.ch
===================================================================
--- src/texk/web2c/psout.ch     (revision 128)
+++ src/texk/web2c/psout.ch     (working copy)
@@ -494,7 +494,7 @@
  @x
    begin print_nl("gsave ");
  @y
-  begin print_ln; print_cmd("gsave ","q ");
+  begin print_nl(""); print_cmd("gsave ","q ");
  @z

  @x

Re: postscript problem

[Peter Rolf]

Taco Hoekwater wrote:
> Peter Rolf wrote:
> 
>>>>> looks like a problem in the metapost beta (context depends on metapost
>>>>> not generating empty lines).
>>>>>
>>>> Thanks for the info. I have "wasted" five hours on this, but I couldn't
>>>> find the place, where the line is inserted.
>>> I'll look this up in the weekend.
>>>
>> Hi Taco. Any news about it?
> 
> Found it. There will be a new metapost beta somewhere in the coming
> week, with the fix added.
>
Many thanks from my side. I can't wait to test the new beta. :)

Best, Peter



> In case anyone is interested right now, the diff is:
> 
> 
> Index: src/texk/web2c/psout.ch
> ===================================================================
> --- src/texk/web2c/psout.ch     (revision 128)
> +++ src/texk/web2c/psout.ch     (working copy)
> @@ -494,7 +494,7 @@
>   @x
>     begin print_nl("gsave ");
>   @y
> -  begin print_ln; print_cmd("gsave ","q ");
> +  begin print_nl(""); print_cmd("gsave ","q ");
>   @z
> 
>   @x
> 
> _______________________________________________
> ntg-context mailing list
> ntg-context@ntg.nl
> http://www.ntg.nl/mailman/listinfo/ntg-context
>