mplib errors

mplib errors

[Olivier]

Dear all,

I'm using ConTeXt MkIV on Debian with the following version:

ConTeXt  ver: 2008.05.21 15:21 MKIV  fmt: 2008.8.4  int: english/english

Everything seems to work well (I am able to run lua code, use otf font
facilities, etc...) but the mplib mechanism.  Indeed, running through
the following simple file :

\starttext
\startMPcode
  path p ; p := fullcircle scaled 4cm ; 
  fill p                  withcolor red ;
  fill p shifted(2cm,0cm) withcolor blue ;
\stopMPcode
\stoptext

provokes the following logging :

mplib          : loading format: metafun.mp, name:
/home/olivier/luatex-cache/context/6300afb4995fe38c77e9b86ed1ef1028/formats/cont-en-metafun.mem
mplib          : version mismatch: mp_parent_version <> 2008.05.21 15:21
mplib          : making format: metafun.mp, name:
/home/olivier/luatex-cache/context/6300afb4995fe38c77e9b86ed1ef1028/formats/cont-en-metafun.mem
mplib          : loading format: metafun.mp, name:
/home/olivier/luatex-cache/context/6300afb4995fe38c77e9b86ed1ef1028/formats/cont-en-metafun.mem
report >> mp terminal:
(/usr/share/texmf/metapost/context/base/mp-tool.mp
! Missing `=' has been inserted.
<to be read again> 
                   ,
l.51 vardef mpversioncmp(expr s,
                                 c) =
etc...

The format metafun.mp is not good at first, but seems to be regenerated
dynamically with success ?  

Is this a known issue ? Any hints on what's going on ?

Olivier
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Re: mplib errors

[luigi scarso]

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On Mon, Sep 29, 2008 at 5:55 PM, Olivier <billet@eurecom.fr> wrote:

> Dear all,
>
> I'm using ConTeXt MkIV on Debian with the following version:
>
> ConTeXt  ver: 2008.05.21 15:21 MKIV  fmt: 2008.8.4  int: english/english
>
> Everything seems to work well (I am able to run lua code, use otf font
> facilities, etc...) but the mplib mechanism.  Indeed, running through
> the following simple file :
>
> \starttext
> \startMPcode
>  path p ; p := fullcircle scaled 4cm ;
>  fill p                  withcolor red ;
>  fill p shifted(2cm,0cm) withcolor blue ;
> \stopMPcode
> \stoptext
>
I have prepended
\setupcolors[state=start]

BTW, no problems with
MtxRun | current version: 2008.08.05 18:47
This is LuaTeX, Version snapshot-0.29.0-2008071816

and  with beta
MtxRun | current version: 2008.09.24 18:41
This is LuaTeX, Version snapshot-0.29.0-2008071816




-- 
luigi

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___________________________________________________________________________________

Re: mplib errors

[Olivier]

Hi Luigi,

> > \starttext
> > \startMPcode
> >  path p ; p := fullcircle scaled 4cm ;
> >  fill p                  withcolor red ;
> >  fill p shifted(2cm,0cm) withcolor blue ;
> > \stopMPcode
> > \stoptext
> >
> I have prepended
> \setupcolors[state=start]

This is indeed required to get the color but my problem is that the
graphic do not get typeset at all!  As can be seen from the log file 

report >> mp terminal:
(/usr/share/texmf/metapost/context/base/mp-tool.mp
! Missing `=' has been inserted.
<to be read again> 
                    ,
l.51 vardef mpversioncmp(expr s,
                                c) =
! Missing `=' has been inserted.
<to be read again> 
)
[...a long list of such errors omitted...]

there is an issue with loading mp-tool.mp
Could it be that something related to mplib is not package in Norbert
Preining's packages?  Is there a particular file that I should look for? 

> BTW, no problems with
> MtxRun | current version: 2008.08.05 18:47
> This is LuaTeX, Version snapshot-0.29.0-2008071816
> 
> and  with beta
> MtxRun | current version: 2008.09.24 18:41
> This is LuaTeX, Version snapshot-0.29.0-2008071816

Thanks for the information,
Olivier
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___________________________________________________________________________________

Re: mplib errors

[Hans van der Meer]

Olivier: What system do you use? I am using MacOSX and in july this  
year I mailed about the error below:

>> mplib          : making format: metafun.mp, name: /Users/hans/TeX/ 
>> luatex-cache/context/60e9a4b67d8fc84c21043806bb9e2fb8/formats/cont- 
>> en-metafun.mem
>> mplib          : loading format: metafun.mp, name: /Users/hans/TeX/ 
>> luatex-cache/context/60e9a4b67d8fc84c21043806bb9e2fb8/formats/cont- 
>> en-metafun.mem
>> report >> mp terminal: (/usr/local/texlive/2007/texmf-context/ 
>> metapost/context/base/mp-tool.mp
>> ! Missing `=' has been inserted.
>> <to be read again>
>>                   ,
>> l.51 vardef mpversioncmp(expr s,
>>                                 c) =
>> ! Missing `=' has been inserted.
>> <to be read again>
>>                   )
>> l.55 vardef mpversionlt (expr s)

Sounds familiar? If you are also working on MacOSX(10.5.x) then I  
should expect the problem to be platform specific. I had some  
discussions with Taco Hoekwater about this problem, but we never  
solved it and I have no inkling of its cause. Since I am not well  
enough acquainted with the code behind mplib and friends, I had to  
fall back on using MKII and putting MKIV aside.
But I guess the solution to this problem is pressing, since we cannot  
have one platform falling out on ConTeXt.

Hans van der Meer




On 29 sep 2008, at 17:55, Olivier wrote:

> Dear all,
>
> I'm using ConTeXt MkIV on Debian with the following version:
>
> ConTeXt  ver: 2008.05.21 15:21 MKIV  fmt: 2008.8.4  int: english/ 
> english
>
> Everything seems to work well (I am able to run lua code, use otf font
> facilities, etc...) but the mplib mechanism.  Indeed, running through
> the following simple file :
>
> \starttext
> \startMPcode
>  path p ; p := fullcircle scaled 4cm ;
>  fill p                  withcolor red ;
>  fill p shifted(2cm,0cm) withcolor blue ;
> \stopMPcode
> \stoptext
>
> provokes the following logging :
>
> mplib          : loading format: metafun.mp, name:
> /home/olivier/luatex-cache/context/6300afb4995fe38c77e9b86ed1ef1028/ 
> formats/cont-en-metafun.mem
> mplib          : version mismatch: mp_parent_version <> 2008.05.21  
> 15:21
> mplib          : making format: metafun.mp, name:
> /home/olivier/luatex-cache/context/6300afb4995fe38c77e9b86ed1ef1028/ 
> formats/cont-en-metafun.mem
> mplib          : loading format: metafun.mp, name:
> /home/olivier/luatex-cache/context/6300afb4995fe38c77e9b86ed1ef1028/ 
> formats/cont-en-metafun.mem
> report >> mp terminal:
> (/usr/share/texmf/metapost/context/base/mp-tool.mp
> ! Missing `=' has been inserted.
> <to be read again>
>                   ,
> l.51 vardef mpversioncmp(expr s,
>                                 c) =
> etc...
>
> The format metafun.mp is not good at first, but seems to be  
> regenerated
> dynamically with success ?
>
> Is this a known issue ? Any hints on what's going on ?
>
> Olivier
> ___________________________________________________________________________________
> If your question is of interest to others as well, please add an  
> entry to the Wiki!
>
> maillist : ntg-context@ntg.nl / http://www.ntg.nl/mailman/listinfo/ntg-context
> webpage  : http://www.pragma-ade.nl / http://tex.aanhet.net
> archive  : https://foundry.supelec.fr/projects/contextrev/
> wiki     : http://contextgarden.net
> ___________________________________________________________________________________

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___________________________________________________________________________________

Re: mplib errors

[Taco Hoekwater]

Hi,

To both of you:

Hans van der Meer wrote:

>>> /usr/local/texlive/2007/texmf-context/metapost/context/base/mp-tool.mp

Olivier wrote:

>> /usr/share/texmf/metapost/context/base/mp-tool.mp

Can you guys check if these are the correct versions of mp-tool.mp ?
The problem could be as basal as mp finding older versions of the
metafun files (from before the mkiv support).


Best wishes,
Taco
(who assumes Olivier is on intel/amd, not powerpc)

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___________________________________________________________________________________

Re: mplib errors

[Olivier]

Hi Taco,

> Hans van der Meer wrote:
> 
> >>> /usr/local/texlive/2007/texmf-context/metapost/context/base/mp-tool.mp
> 
> Olivier wrote:
> 
> >> /usr/share/texmf/metapost/context/base/mp-tool.mp
> 
> Can you guys check if these are the correct versions of mp-tool.mp ?
> The problem could be as basal as mp finding older versions of the
> metafun files (from before the mkiv support).

My mp-tool.mp file is the same as 

http://minimals.contextgarden.net/current/context/latest/metapost/context/base/mp-tool.mp

that is contains 
if not known mpversion : string mpversion ; mpversion := "0.641" ; fi ;
and
%D        version=1998.02.15,


> (who assumes Olivier is on intel/amd, not powerpc)

I'm indeed working on a Debian system with intel plateform.
(But Hans' config is not that different : some sort of Unix with TeXlive
distrib.) The texlive packages I'm using are those of Norbert Preining,
last version. 

What is the executable that is triggered by a call to mplib?
(I would like to check I have it installed, not only mpost.)
Again, everything else in conTeXt works well (otf direct from file
names, lua scripting, etc).

Olivier
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___________________________________________________________________________________

Re: mplib errors

[Taco Hoekwater]

Olivier wrote:
> 
> What is the executable that is triggered by a call to mplib?
> (I would like to check I have it installed, not only mpost.)

There isn't one, it is all internal to luatex's executable.

There are no external executables and no config files involved,
and that is what makes these errors so weird (well, that and
the fact that it only seems to happen to Hans and you).

Confused,
Taco



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Re: mplib errors

[luigi scarso]

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On Mon, Sep 29, 2008 at 9:44 PM, Olivier <billet@eurecom.fr> wrote:

> Hi Luigi,
>
> > > \starttext
> > > \startMPcode
> > >  path p ; p := fullcircle scaled 4cm ;
> > >  fill p                  withcolor red ;
> > >  fill p shifted(2cm,0cm) withcolor blue ;
> > > \stopMPcode
> > > \stoptext
> > >
> > I have prepended
> > \setupcolors[state=start]
>
> This is indeed required to get the color

 yes, I didn't like greys circles...

> but my problem is that the
> graphic do not get typeset at all!  As can be seen from the log file
>
Just to be sure, in attachment my pdf
I found really easy to install minimals under ubuntu (just download
first-setup.sh), so I can have one
sandbox of mkiv+luatex stable and one for beta .
Why don't you give it a try ?
(don't forget to update to latest luatex)

-- 
luigi

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___________________________________________________________________________________

Re: mplib errors

[Hans van der Meer]

Hi Taco,

I did "kpsewhich mp-tool.mp" and it came up with "/usr/local/texlive/ 
2007/texmf-context/metapost/context/base/mp-tool.mp". That file has in  
my system creation+modification date "01-04-08 02:14" and was last  
opened "03-07-08" so this must be it. Came straight from unpacking the  
context distribution zip. This should have been cont-tmf.zip created  
"05-08-08 17:13".

The other mp-tool.mp in my system is /usr/local/texlive/2007/texmf- 
dist/metapost/context/base/mp-tool.mp. I also checked this one and  
found it has creation+modification date "06-02-08 12:52" and was last  
opened "06-02-08 12:52". So this one was apparently never used by me  
after installing texlive2007.

I think this proves the file in my case is indeed the "01-04-08 02:14"  
one.

Hans van der Meer




On 29 sep 2008, at 22:10, Taco Hoekwater wrote:

>
>
> Hi,
>
> To both of you:
>
> Hans van der Meer wrote:
>
>>>> /usr/local/texlive/2007/texmf-context/metapost/context/base/mp- 
>>>> tool.mp
>
> Olivier wrote:
>
>>> /usr/share/texmf/metapost/context/base/mp-tool.mp
>
> Can you guys check if these are the correct versions of mp-tool.mp ?
> The problem could be as basal as mp finding older versions of the
> metafun files (from before the mkiv support).
>
>
> Best wishes,
> Taco
> (who assumes Olivier is on intel/amd, not powerpc)
>
> ___________________________________________________________________________________
> If your question is of interest to others as well, please add an  
> entry to the Wiki!
>
> maillist : ntg-context@ntg.nl / http://www.ntg.nl/mailman/listinfo/ntg-context
> webpage  : http://www.pragma-ade.nl / http://tex.aanhet.net
> archive  : https://foundry.supelec.fr/projects/contextrev/
> wiki     : http://contextgarden.net
> ___________________________________________________________________________________

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___________________________________________________________________________________

Re: mplib errors

[Taco Hoekwater]

Hans van der Meer wrote:
> 
> I think this proves the file in my case is indeed the "01-04-08 02:14"  
> one.

A shame, really. If the file was wrong, there was a chance to catch the
bug. As it stands, I am still just as dumbfounded as I was before.

Best wishes,
Taco
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Re: mplib errors

[Olivier]

Hi Luigi,

> I found really easy to install minimals under ubuntu
> (just download first-setup.sh), so I can have one
> sandbox of mkiv+luatex stable and one for beta .
> Why don't you give it a try ?
> (don't forget to update to latest luatex)

I'm sure minimals are worth a try. But as I stated before, everything
but the mplib is working fine + I like the packaging of Norbert Preining
which is very well done and LuaTeX is getting updated very often + I
packaged for Debian a lot of conTeXt style files and font setups for people
in my group + using such official Debian packages gives them a chance to
be improved and debugged which will benefit other people...

Olivier
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___________________________________________________________________________________

Re: mplib errors

[luigi scarso]

[-- Attachment #1.1: Type: text/plain, Size: 1578 bytes --]

On Tue, Sep 30, 2008 at 10:54 AM, Olivier <billet@eurecom.fr> wrote:

> Hi Luigi,
>
> > I found really easy to install minimals under ubuntu
> > (just download first-setup.sh), so I can have one
> > sandbox of mkiv+luatex stable and one for beta .
> > Why don't you give it a try ?
> > (don't forget to update to latest luatex)
>
> I'm sure minimals are worth a try. But as I stated before, everything
> but the mplib is working fine + I like the packaging of Norbert Preining
> which is very well done and LuaTeX is getting updated very often + I
> packaged for Debian a lot of conTeXt style files and font setups for people
> in my group + using such official Debian packages gives them a chance to
> be improved and debugged which will benefit other people...
>
All ok, I didn't meant that you must switch to minimals .

In Ubuntu I have put  minimals under /opt/luatex/minimals (and minimals-beta
in /opt/luatex/minimals-beta) .
They are unrelated with package system, texlive2007, texlive2008 and so on ;
also installing/updating minimals is easy (at least on ubuntu) apart luatex
version (but it's not really a problem) .
I run every tests under minimals and minimals-beta .
If they work, I assume minimals / minimals-beta are OK .
Your test works on my minimals, so (my) minimals are OK.
So if you install minimals /minimals-beta you can even say what is wrong in
your packaging
(if something is wrong: maybe you have mixed  files) .

I feel good with ubuntu, but for TeX related stuff I prefear manual
installation . I don't expect that anyone agree on this .
-- 
luigi

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___________________________________________________________________________________

Re: mplib errors

[Ulrike Fischer]

Am Mon, 29 Sep 2008 17:55:15 +0200 schrieb Olivier:


> mplib          : loading format: metafun.mp, name:
> /home/olivier/luatex-cache/context/6300afb4995fe38c77e9b86ed1ef1028/formats/cont-en-metafun.mem
> mplib          : version mismatch: mp_parent_version <> 2008.05.21 15:21
> mplib          : making format: metafun.mp, name:
> /home/olivier/luatex-cache/context/6300afb4995fe38c77e9b86ed1ef1028/formats/cont-en-metafun.mem

> The format metafun.mp is not good at first, but seems to be regenerated
> dynamically with success ?  

Do you get still this regeneration message or has it disappeared? 
If not I would say the format generation was not successfull. 

-- 
Ulrike Fischer 

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Re: mplib errors

[Olivier]

Hi Ulrike,

Quoting  "Ulrike Fischer" :
> -- was news2@nililand.de on Sep 30, 2008 at 11:27:08 --

> Am Mon, 29 Sep 2008 17:55:15 +0200 schrieb Olivier:
> 
> 
> > mplib          : loading format: metafun.mp, name:
> > /home/olivier/luatex-cache/context/6300afb4995fe38c77e9b86ed1ef1028/formats/cont-en-metafun.mem
> > mplib          : version mismatch: mp_parent_version <> 2008.05.21 15:21
> > mplib          : making format: metafun.mp, name:
> > /home/olivier/luatex-cache/context/6300afb4995fe38c77e9b86ed1ef1028/formats/cont-en-metafun.mem
> 
> > The format metafun.mp is not good at first, but seems to be regenerated
> > dynamically with success ?  
> 
> Do you get still this regeneration message or has it disappeared? 
> If not I would say the format generation was not successfull. 

Indeed, this format gets regenerated every time.
Is there a way to genereate it separatly?

Olivier
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Re: mplib errors

[Olivier]

Hi Taco,

Quoting  "Taco Hoekwater" :
> -- was taco@elvenkind.com on Sep 29, 2008 at 11:27:03 --

> Olivier wrote:
> > 
> > What is the executable that is triggered by a call to mplib?
> > (I would like to check I have it installed, not only mpost.)
> 
> There isn't one, it is all internal to luatex's executable.
> 
> There are no external executables and no config files involved,

So, I guess it would make sense to test the compiler directly:
what is the most basic way to trigger mplib from a plain tex file
directly run through LuaTeX (i.e. the equivalent of the startMPgraphic
if any? (And this might provide some more information on what's going on.)

Olivier
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___________________________________________________________________________________

Re: mplib errors

[Taco Hoekwater]

Olivier wrote:
> 
> So, I guess it would make sense to test the compiler directly:
> what is the most basic way to trigger mplib from a plain tex file
> directly run through LuaTeX (i.e. the equivalent of the startMPgraphic
> if any? (And this might provide some more information on what's going on.)

Just look at mlib-run.lua from the context distribution, it should
be clear enough.

Best wishes,
Taco
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Re: mplib errors

[Ulrike Fischer]

Am Tue, 30 Sep 2008 11:37:13 +0200 schrieb Olivier:

>> Do you get still this regeneration message or has it disappeared? 
>> If not I would say the format generation was not successfull. 
> 
> Indeed, this format gets regenerated every time.
> Is there a way to genereate it separatly?

I don't know ;-(. I know up to nothing about context and metapost. But
both you and Hans get this regeneration of the formats so I suspect it
is the source of the problem. At least it is certainly not normal and
one should always start with the first error. 


-- 
Ulrike Fischer 

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Re: mplib errors

[Hans Hagen]

Ulrike Fischer wrote:
> Am Tue, 30 Sep 2008 11:37:13 +0200 schrieb Olivier:
> 
>>> Do you get still this regeneration message or has it disappeared? 
>>> If not I would say the format generation was not successfull. 
>> Indeed, this format gets regenerated every time.
>> Is there a way to genereate it separatly?
> 
> I don't know ;-(. I know up to nothing about context and metapost. But
> both you and Hans get this regeneration of the formats so I suspect it
> is the source of the problem. At least it is certainly not normal and
> one should always start with the first error. 

a new cont-en-metafun.mem gets generated when

(1) it's not there
(2) the context version changed
(3) the metafun version changed

mkiv does not use the metafun.mem file

Hans


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               Ridderstraat 27 | 8061 GH Hasselt | The Netherlands
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                                              | www.pragma-pod.nl
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Re: mplib errors

[Hans Hagen]

Ulrike Fischer wrote:
> Am Mon, 29 Sep 2008 17:55:15 +0200 schrieb Olivier:
> 
> 
>> mplib          : loading format: metafun.mp, name:
>> /home/olivier/luatex-cache/context/6300afb4995fe38c77e9b86ed1ef1028/formats/cont-en-metafun.mem
>> mplib          : version mismatch: mp_parent_version <> 2008.05.21 15:21
>> mplib          : making format: metafun.mp, name:
>> /home/olivier/luatex-cache/context/6300afb4995fe38c77e9b86ed1ef1028/formats/cont-en-metafun.mem
> 
>> The format metafun.mp is not good at first, but seems to be regenerated
>> dynamically with success ?  
> 
> Do you get still this regeneration message or has it disappeared? 
> If not I would say the format generation was not successfull. 

maybe a mismatch between the binary and context (maybe the log file in 
the cache formats paths tells more)

Hans

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               Ridderstraat 27 | 8061 GH Hasselt | The Netherlands
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                                              | www.pragma-pod.nl
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Re: mplib errors

[Olivier]

Taco,

> > So, I guess it would make sense to test the compiler directly:
> > what is the most basic way to trigger mplib from a plain tex file
> > directly run through LuaTeX (i.e. the equivalent of the startMPgraphic
> > if any? (And this might provide some more information on what's going on.)
 
> Just look at mlib-run.lua from the context distribution, it should
> be clear enough.

Thanks for the pointer.  I played a bit with pdfluatex directly which
seems to work. (I'm not to the point of producing figures, because I
would have to rebuild all the functions that are located in mlib-run.lua
and the luatexref-t.tex does not give straightforward example of how the
mplib module should be used, it only describes the functions API. Btw:
could you add in the doc a simple example of how to set up an mplib instance
(loading the format file) and typesetting a minimal graphic, and then
use it from within plain TeX for instance; this is transparent to
conTeXt users since there are files like mlib-run.lua but not easy for
plain TeX users :P  And I'm not advocating the use of plain TeX,
I'm a converted conTeXt user since 2003, but this will help user
understand (a bit) how things work behind the scene.) 

Thanks for your (and all the posters') interest,
Olivier
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Re: mplib errors

[Taco Hoekwater]

[-- Attachment #1: Type: text/plain, Size: 771 bytes --]


Hi Olivier,

Olivier wrote:
> Btw: could you add in the doc a simple example of how to set up an mplib instance
> (loading the format file) and typesetting a minimal graphic, and then
> use it from within plain TeX for instance; this is transparent to
> conTeXt users since there are files like mlib-run.lua but not easy for
> plain TeX users :P  

Running mplib is easy enough to document, but that is only a part of
the work: you also have to convert the image to pdf literals, and
that is more work than I would like to put in the manual. Anyway, 
attached is a bunch of definitions I stripped out of context that
will allow you to run mplib in plain tex provided that you also have
context installed (you need mlib-pdf.lua for the PDF conversion)

Best wishes,
Taco

[-- Attachment #2: mplib.lua --]
[-- Type: text/plain, Size: 2114 bytes --]


metapost = (metapost or {})

function metapost.report (a)
   print ("\n" .. a)
end

function metapost.finder (name, mode, ftype)
   return (mode=="w" and  name) or kpse.find_file(name, ftype)
end

function metapost.make(name, target, finder)
   local status = 2 -- higher numbers are errors
   finder = (finder or metapost.finder)
   local mpx = mplib.new ( {
                             hash_size = 100000,
                             main_memory = 2000000,
                             max_in_open = 50,
                             param_size = 100000,
                             ini_version = true,
                             find_file = finder,
                             job_name = target,
                          } )
   if mpx then
      local result = mpx:execute("input " .. name .. "; dump;")
      if result then status = result.status end
      mpx:finish()
   end
   if status < 2 then
      metapost.report('mp message: created mem file ' .. target )
   else 
      metapost.report('mp error: mem file generation failed')
   end
end

function metapost.load(name, finder)
   finder = (finder or metapost.finder)
   local memname = finder("mplib-" .. name,"r","mem")
   if not memname then
      memname = finder("mplib-" .. name, "w", "mem")
      metapost.make(name, memname, finder)
   end
   metapost.report('mp message: using mem file ' .. memname)
   local mpx = mplib.new ( {
                             ini_version = false,
                             mem_name = memname,
                             find_file = finder,
                          } )
   if not mpx then
      metapost.report('mp error: mem loading failed')
   end
   return mpx
end

function metapost.process(mpx, data)
    local result
    if mpx and data then
        result = mpx:execute(data)
        -- todo: error message
        if not result then
           metapost.report("mp error: no result object returned")
        elseif result.status > 0 then
           metapost.report("mp error:" .. (result.term or "no-term") .. "\n" .. (result.error or "no-error"))
        end
     end
     return result
end


[-- Warning: decoded text below may be mangled, UTF-8 assumed --]
[-- Attachment #3: mplibtest.tex --]
[-- Type: text/x-tex; name="mplibtest.tex", Size: 1557 bytes --]


\pdfoutput = 1
\pdfcompresslevel=0

\directlua0{ dofile ("mplib.lua") }
\directlua0{ dofile (kpse.find_file('mlib-pdf.lua')) }

% some things that are normally pre-defined in context

\newdimen\onebasepoint 
\onebasepoint = 1bp
\newbox\scratchbox
{\catcode`\% =12 \gdef\letterpercent{%}}
\directlua0{ tex.ctxcatcodes = 0 }

% the three macros output by the context converter:

\def\startMPLIBtoPDF#1#2#3#4% watch the transparency reset
  {\hbox\bgroup
   \xdef\MPllx{#1}%
   \xdef\MPlly{#2}%
   \xdef\MPurx{#3}%
   \xdef\MPury{#4}%
   \xdef\MPwidth {\the\dimexpr#3\onebasepoint-#1\onebasepoint\relax}%
   \xdef\MPheight{\the\dimexpr#4\onebasepoint-#2\onebasepoint\relax}%
   \setbox\scratchbox\vbox\bgroup
   \noindent % this is really needed in order to force tex into proper cm's
}

\let\MPLIBtoPDF\pdfliteral

\def\stopMPLIBtoPDF % watch the transparency reset
  {\egroup
   \setbox\scratchbox\hbox\bgroup
     \hskip-\MPllx\onebasepoint
     \raise-\MPlly\onebasepoint
     \box\scratchbox
   \egroup
   \setbox\scratchbox\vbox to \MPheight\bgroup
     \vfill
     \hsize\MPwidth
     \ht\scratchbox=0pt
     \dp\scratchbox=0pt
     \box\scratchbox
   \egroup
   \wd\scratchbox\MPwidth
   \ht\scratchbox\MPheight
   \box\scratchbox
   \egroup }

% our own command

\def\mp#1{\directlua0{ 
  if not mpx then mpx = metapost.load('plain') end
  local f = metapost.process(mpx,'#1')
  if f then    
    print (f.term)
    if f.fig then
      metapost.convert(f)
    end
  end
}}

\mp{beginfig(1); draw fullcircle scaled 20 withcolor (1,0,0); endfig;}

\bye

[-- Attachment #4: Type: text/plain, Size: 487 bytes --]

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Re: mplib errors

[Olivier]

Hi Taco,

> Running mplib is easy enough to document, but that is only a part of
> the work: you also have to convert the image to pdf literals, and
> that is more work than I would like to put in the manual. 

OK. It could be nice then to simply state this?

> Anyway, attached is a bunch of definitions I stripped out of context
> that will allow you to run mplib in plain tex provided that you also
> have context installed (you need mlib-pdf.lua for the PDF conversion)

Thanks a lot for these. With these hints I am now able to compile
metapost figs from conTeXt through "texexec --luatex" normaly.
To this end, I had to perform two tweaks:

* the files mlib-run.lua, mlib-ctx.lua, and mlib-pdf.lua were *NEVER*
  loaded so I added to my conTeXt source file:
  \directlua0 { dofile
  ("/usr/share/texmf/tex/context/base/mlib-ctx.lua") }
  \directlua0 { dofile
  ("/usr/share/texmf/tex/context/base/mlib-run.lua") }
  \directlua0 { dofile
  ("/usr/share/texmf/tex/context/base/mlib-pdf.lua") }

* the format was generated correctly but loaded incorrectly:
  I had to add the following line:
               ini_version = false,
  in the metapost.load function in the mlib-run.lua file.

Now everything is OK.  The second thing (an misfortunate typo) is easy
to fix.  However, the fact that mlib-*.lua are never loaded is more worrying:
any idea where this error comes from?

Hope this will help Hans as well.

Cheers,
Olivier
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Re: mplib errors

[Taco Hoekwater]

Hi Olivier and Hans,

Olivier wrote:
> 
> Thanks a lot for these. With these hints I am now able to compile
> metapost figs from conTeXt through "texexec --luatex" normaly.
> To this end, I had to perform two tweaks:
> 
> * the files mlib-run.lua, mlib-ctx.lua, and mlib-pdf.lua were *NEVER*
>   loaded so I added to my conTeXt source file:
>   \directlua0 { dofile
>   ("/usr/share/texmf/tex/context/base/mlib-ctx.lua") }
>   \directlua0 { dofile
>   ("/usr/share/texmf/tex/context/base/mlib-run.lua") }
>   \directlua0 { dofile
>   ("/usr/share/texmf/tex/context/base/mlib-pdf.lua") }

Wouldn't that mean that

   $ luatools mlib-pdf.lua

also fails to find the files? luatools --generate should be able to
fix that.

> * the format was generated correctly but loaded incorrectly:
>   I had to add the following line:
>                ini_version = false,
>   in the metapost.load function in the mlib-run.lua file.
> 
> Now everything is OK.  The second thing (an misfortunate typo) is easy
> to fix.  

This should be fixable by simply updating your context, because that
is already fixed in newer contexts. But this could well be the cause
of Hans' problems.

Best wishes,
Taco
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Re: mplib errors

[Olivier]

Taco,

> Wouldn't that mean that
> 
>    $ luatools mlib-pdf.lua
> 
> also fails to find the files? luatools --generate should be able to
> fix that.

Indeed "luatools mlib-pdf.lua" fails to find the file.
However "luatools --generate" does not help.
I'll investigate why.

> This should be fixable by simply updating your context, because that
> is already fixed in newer contexts. But this could well be the cause
> of Hans' problems.

I would have think so :)

Best,
Olivier
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