Hi,
some time ago I needed to include a png file into a MetaPost picture and
I did it with the MetaFun macro externalfigure. I compiled the code with
mptopdf and the result was fine. Since I had no previous experience with
it, my code used LaTeX, not ConTeXt, for the labels.
I have recently updated my distributions (TeX Live 2007 and gwTeX on Mac
OS X) and the same code does not work any longer in either distribution.
A minimal example reproducing the problem is as follows:
verbatimtex
%&latex
\documentclass{article}
\begin{document}
etex
beginfig(0);
externalfigure "pic.png" scaled 15mm shifted origin;
label.bot(btex $x$ etex, origin);
endfig;
end;
The error mptopdf gives is:
! Undefined control sequence.
l.44 \documentclass
{article}
as if the code were not interpreted as LaTeX code. I have tried the
following two variants, but with no positive results:
1) I have used
input TEX;
TEXPRE("%&latex" & char(10) &
"\documentclass{article}\begin{document}");
TEXPOST("\end{document}");
instead of the verbatimtex.. etex block, and
label.bot(TEX("x_1"), origin);
to draw the label. In this case, mptopdf does not complain, but I see
'0' instead of the label in the output.
2) I have added
input mp-tool;
input mp-spec;
to both the original code above and to variant 1) and I have typeset
with mpost. The results are
original code) the png picture is not shown in the output;
variant 1) I get the error:
! Unable to make mpx file.
l.3 btex
x_1 etex
So, I kindly ask someone to help me tidy things up. In particular:
a) Is it possible to include the MetaFun macros when using mpost?
b) Is it possible to use the %&latex syntax with mptopdf?
Nicola
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