Re: Using MetaPost graphics in ConTeXt

Re: Using MetaPost graphics in ConTeXt

[Hans Hagen]

At 08:16 PM 3/24/2003 +0100, you wrote:

>The macro \calculateexternalfigure seems to set the extension to empty
>if the figure file name is the same as the jobname:
>
>    % redo message, only filename
>    \doifparentfileelse\@@effilename
>      {\@EA\removefromcommalist\@EA{\jobsuffix}\figuretypes
>       \let\@@efextension\empty
>       \showmessage\m!figures9\@@effilename
>       \donefalse}
>      \donothing
>
>(core-fig.tex)
>
>Therefore it does not search for your nonstandard extension.

the search for graphics is kind of fuzzy and dates from the time that we 
were still using dvi (different backends)

- without suffix: try the best quality (depends on spec driver support)
- with suffix: try that first, else locate alternative
- same as parent file: try to avoid circular loading (keep in mind that tex 
code can be a graphic, i.e. buffers can be scaled)

- all these are combined with a search over several paths, utilityfile, etc

also, most of this is overloaded when using figure databases -)
Hans
-------------------------------------------------------------------------
                                   Hans Hagen | PRAGMA ADE | pragma@wxs.nl
                       Ridderstraat 27 | 8061 GH Hasselt | The Netherlands
  tel: +31 (0)38 477 53 69 | fax: +31 (0)38 477 53 74 | www.pragma-ade.com
-------------------------------------------------------------------------
                        information: http://www.pragma-ade.com/roadmap.pdf
                     documentation: http://www.pragma-ade.com/showcase.pdf
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Re[2]: Using MetaPost graphics in ConTeXt

[Giuseppe Bilotta]

Tuesday, March 25, 2003 Hans Hagen wrote:

HH> the search for graphics is kind of fuzzy and dates from the time that we
HH> were still using dvi (different backends)

HH> - without suffix: try the best quality (depends on spec driver support)
HH> - with suffix: try that first, else locate alternative
HH> - same as parent file: try to avoid circular loading (keep in mind that tex
HH> code can be a graphic, i.e. buffers can be scaled)

The third point is too severe in its behaviour: it's a good thing that circular
loading is prevented, but this shouldn't prevent inclusion of
other files with different extensions! After the removal of the
\jobsuffix extension, inclusion should go on normally!

-- 
Giuseppe "Oblomov" Bilotta

Re[2]: Using MetaPost graphics in ConTeXt

[Hans Hagen]

At 11:38 AM 3/25/2003 +0100, you wrote:

>The third point is too severe in its behaviour: it's a good thing that 
>circular
>loading is prevented, but this shouldn't prevent inclusion of
>other files with different extensions! After the removal of the
>\jobsuffix extension, inclusion should go on normally!

it will, fo rthose sufixes that are recognized as being supported by the 
backend; numbers are special case in the sense that they don't relate to a 
file format; if you uncomment the lines i mentioned you get them supported

Hans
-------------------------------------------------------------------------
                                   Hans Hagen | PRAGMA ADE | pragma@wxs.nl
                       Ridderstraat 27 | 8061 GH Hasselt | The Netherlands
  tel: +31 (0)38 477 53 69 | fax: +31 (0)38 477 53 74 | www.pragma-ade.com
-------------------------------------------------------------------------
                        information: http://www.pragma-ade.com/roadmap.pdf
                     documentation: http://www.pragma-ade.com/showcase.pdf
-------------------------------------------------------------------------

Re[3]: Using MetaPost graphics in ConTeXt

[Giuseppe Bilotta]

Tuesday, March 25, 2003 Hans Hagen wrote:

HH> At 11:38 AM 3/25/2003 +0100, you wrote:

>>The third point is too severe in its behaviour: it's a good thing that
>>circular
>>loading is prevented, but this shouldn't prevent inclusion of
>>other files with different extensions! After the removal of the
>>\jobsuffix extension, inclusion should go on normally!

HH> it will, fo rthose sufixes that are recognized as being supported by the
HH> backend; numbers are special case in the sense that they don't relate to a
HH> file format; if you uncomment the lines i mentioned you get them supported

The problem is not the numbers as such, it's a more general point;
especially then type= or method= are specified, extension should
be irrelevant as long as it doesn't cause name clash. On a very
general basis, I would say that the best approach would be:

Step 1: check for name clashes:
 * if name = \jobname:
   (a) if extension = \jobsuffix or output suffix (dvi, pdf), quit
   parsing
   (b) if no extension, remove jobsuffix and output suffix from
   list of searched extensions.

Step 2: if extension is specified, and no method is specified,
set method to the one associated with this extension, if there is
one.

Step 3: check if file exists;
 * if we have a full name, try to open the specified
 name.extension, with the specified method
 * if the file is not found, and no extension was specified, look
 for all the known extensions (except the ones forbidden by Step
 1, point b); if a method/type is specified and it has a default extension,
 start looking from that extension

Or something like this ...

-- 
Giuseppe "Oblomov" Bilotta

Re: Using MetaPost graphics in ConTeXt

[Simon Pepping]

On Sun, Mar 23, 2003 at 10:38:37PM +0100, Giuseppe Bilotta wrote:
> Hello,
> 
> I'm trying to use some MetaPost-generated graphics with ConTeXt,
> but I seem to be unable to do so. I have a file test.1 in the same
> directory as the ConTeXt source, which is as minimal as:
> 
> \starttext
> \input tufte
> \placefigure[left]
> {Esempio di settore circolare}
> {\externalfigure[test.1]}
> \input knuth
> \stoptext
> 
> but it seems like it can't find the file test (no extension); I
> tried adding options [type=mps] or [method=mps] or both, but each
> fails with a different error: either it looks for test.mps or it
> looks for test.unknown ...

The macro \calculateexternalfigure seems to set the extension to empty
if the figure file name is the same as the jobname:

   % redo message, only filename  
   \doifparentfileelse\@@effilename
     {\@EA\removefromcommalist\@EA{\jobsuffix}\figuretypes
      \let\@@efextension\empty
      \showmessage\m!figures9\@@effilename
      \donefalse}
     \donothing 

(core-fig.tex)

Therefore it does not search for your nonstandard extension.

Regards, Simon

-- 
Simon Pepping
email: spepping@scaprea.hobby.nl

Re: Using MetaPost graphics in ConTeXt

[Johannes Hüsing]

Giuseppe Bilotta <gip.bilotta@iol.it> [Sun, Mar 23, 2003 at 10:38:37PM CET]:
> Hello,
> 
> I'm trying to use some MetaPost-generated graphics with ConTeXt,
> but I seem to be unable to do so. I have a file test.1 in the same
> directory as the ConTeXt source, which is as minimal as:
> 
> \starttext
> \input tufte
> \placefigure[left]
> {Esempio di settore circolare}
> {\externalfigure[test.1]}

\useexternalfigure[prova][test.1][width=450pt] % the last one is optional
\externalfigure[prova]

Greetings


Johannes
-- 
Johannes Hüsing   There is something fascinating about science. One gets
hannes@ruhrau.de  such wholesale returns of conjecture from such a 
                  trifling investment of fact.                Mark Twain

Using MetaPost graphics in ConTeXt

[Giuseppe Bilotta]

Hello,

I'm trying to use some MetaPost-generated graphics with ConTeXt,
but I seem to be unable to do so. I have a file test.1 in the same
directory as the ConTeXt source, which is as minimal as:

\starttext
\input tufte
\placefigure[left]
{Esempio di settore circolare}
{\externalfigure[test.1]}
\input knuth
\stoptext

but it seems like it can't find the file test (no extension); I
tried adding options [type=mps] or [method=mps] or both, but each
fails with a different error: either it looks for test.mps or it
looks for test.unknown ...

What should I do (apart renaming the figure file)?

-- 
Giuseppe "Oblomov" Bilotta