problem with mp clip

problem with mp clip

[Peter Rolf]

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Hi,

it seems, that clipping with a MetaPost path is broken (at least on my
machine). I couldn't test it on Contextgarden, as the standard example
pictures are not installed (or the !!path is not searched).

Anyhow, if someone can test this please.

I work with the latest minimal distribution (XP), ConTeXt beta from
03.07.2007, pdftex 1.40.4 and mpost 1.0.

Thanks in advance, Peter


@Patrick:
  Is there a way to add the test pictures (cont-img.zip) to 'live context'?


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\setupcolors[state=start]
\setuppagenumber[state=stop]

\startMPclip{ClipTest}
  clip currentpicture to
  unitcircle scaled 3cm;
\stopMPclip

\starttext

\clip[width=3cm,height=3cm,mp=ClipTest]{\externalfigure[mill.png]}

\stoptext

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___________________________________________________________________________________

Re: problem with mp clip

[Patrick Gundlach]

>   Is there a way to add the test pictures (cont-img.zip) to 'live context'?

They are already installed, but not in a local path. I have changed
'live context' so now the sample figures are in the search path. 

Patrick
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Re: problem with mp clip

[Peter Rolf]

Patrick Gundlach schrieb:
>>   Is there a way to add the test pictures (cont-img.zip) to 'live context'?
> 
> They are already installed, but not in a local path. I have changed
> 'live context' so now the sample figures are in the search path. 
> 
> Patrick
>

Thanks Patrick! This makes life easier :)

Peter
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maillist : ntg-context@ntg.nl / http://www.ntg.nl/mailman/listinfo/ntg-context
webpage  : http://www.pragma-ade.nl / http://tex.aanhet.net
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wiki     : http://contextgarden.net
___________________________________________________________________________________

Re: problem with mp clip

[Hans Hagen]

Peter Rolf wrote:
> Hi,
> 
> it seems, that clipping with a MetaPost path is broken (at least on my
> machine). I couldn't test it on Contextgarden, as the standard example
> pictures are not installed (or the !!path is not searched).
> 
> Anyhow, if someone can test this please.
>


has to do with the changed mp output ... in supp-mps.tex change this ...

\bgroup
\catcode`\%=\@@active
\catcode`\/=\@@comment
\gdef\dograbMPclippath/
   {\setbox\scratchbox=\hbox\bgroup/
    \catcode`\%=\@@active
    \obeylines\let\obeyedline\space
    \def\do##1q n##2p W##3\od/
      {\xdef\MPclippath{##2}\endinput}/
    \def%##1%%EOF/
      {\do##1q np W\od\endinput}/
    \readfile{\MPgraphicfile.\the\currentMPgraphic}{}{}/
    \ifx\MPclippath\empty
      \def\do##1newpath##2closepath##3\od/
        {\xdef\MPclippath{##2}\endinput}/
      \def%##1%%EOF/
        {\do##1newpathclosepath\od\endinput}/
      \readfile{\MPgraphicfile.\the\currentMPgraphic}{}{}/
    \fi
    \deallocateMPslot\currentMPgraphic / new
    \egroup}
\egroup

keep in mind that it's still a dirty trick


> I work with the latest minimal distribution (XP), ConTeXt beta from
> 03.07.2007, pdftex 1.40.4 and mpost 1.0.
> 
> Thanks in advance, Peter
> 
> 
> @Patrick:
>   Is there a way to add the test pictures (cont-img.zip) to 'live context'?
> 
> 
> 
> ------------------------------------------------------------------------
> 
> ___________________________________________________________________________________
> 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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               Ridderstraat 27 | 8061 GH Hasselt | The Netherlands
      tel: 038 477 53 69 | fax: 038 477 53 74 | www.pragma-ade.com
                                              | www.pragma-pod.nl
-----------------------------------------------------------------
___________________________________________________________________________________
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
___________________________________________________________________________________

Re: problem with mp clip

[Peter Rolf]

Hans Hagen schrieb:
> Peter Rolf wrote:
>> Hi,
>>
>> it seems, that clipping with a MetaPost path is broken (at least on my
>> machine). I couldn't test it on Contextgarden, as the standard example
>> pictures are not installed (or the !!path is not searched).
>>
>> Anyhow, if someone can test this please.
>>
> 
> 
> has to do with the changed mp output ... in supp-mps.tex change this ...
> 
> \bgroup
> \catcode`\%=\@@active
> \catcode`\/=\@@comment
> \gdef\dograbMPclippath/
>    {\setbox\scratchbox=\hbox\bgroup/
>     \catcode`\%=\@@active
>     \obeylines\let\obeyedline\space
>     \def\do##1q n##2p W##3\od/
>       {\xdef\MPclippath{##2}\endinput}/
>     \def%##1%%EOF/
>       {\do##1q np W\od\endinput}/
>     \readfile{\MPgraphicfile.\the\currentMPgraphic}{}{}/
>     \ifx\MPclippath\empty
>       \def\do##1newpath##2closepath##3\od/
>         {\xdef\MPclippath{##2}\endinput}/
>       \def%##1%%EOF/
>         {\do##1newpathclosepath\od\endinput}/
>       \readfile{\MPgraphicfile.\the\currentMPgraphic}{}{}/
>     \fi
>     \deallocateMPslot\currentMPgraphic / new
>     \egroup}
> \egroup
> 
> keep in mind that it's still a dirty trick
>

Many thanks Hans. Works like a charm (dirty trick, but clean cut).

Peter

> 
>> I work with the latest minimal distribution (XP), ConTeXt beta from
>> 03.07.2007, pdftex 1.40.4 and mpost 1.0.
>>
>> Thanks in advance, Peter
>>
>>
>> @Patrick:
>>   Is there a way to add the test pictures (cont-img.zip) to 'live context'?
>>
>>
>>
>> ------------------------------------------------------------------------
>>
>> ___________________________________________________________________________________
>> 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
>> ___________________________________________________________________________________
> 
> 

___________________________________________________________________________________
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
___________________________________________________________________________________