The graphviz.pm plug-in currently attempts to read PNG data in UTF-8 mode, which sometimes fail with a message similar to the following (depending on the input):
utf8 "\x89" does not map to Unicode at /usr/local/lib/perl5/site_perl/5.8.8/IkiWiki/Plugin/graphviz.pm line 53, <IN> chunk 1.
Wide character in subroutine entry at /usr/local/lib/perl5/site_perl/5.8.8/IkiWiki/Plugin/graphviz.pm line 68.
It also generates image URLs relative to the page being rendered, which means the URLs wont work when previewing a graph from the CGI script.
The patch below fixes these two issues.
--- graphviz.pm.orig Thu Jun 7 15:45:16 2007
+++ graphviz.pm Fri Jun 8 12:03:38 2007
@@ -41,7 +41,6 @@ sub render_graph (\%) { #{{{
$pid=open2(*IN, *OUT, "$params{prog} -Tpng");
# open2 doesn't respect "use open ':utf8'"
- binmode (IN, ':utf8');
binmode (OUT, ':utf8');
print OUT $src;
@@ -70,7 +69,12 @@ sub render_graph (\%) { #{{{
}
}
- return "<img src=\"".urlto($dest, $params{page})."\" />\n";
+ if ($params{preview}) {
+ return "<img src=\"".urlto($dest, "")."\" />\n";
+ }
+ else {
+ return "<img src=\"".urlto($dest, $params{page})."\" />\n";
+ }
} #}}}
sub graph (@) { #{{{
