libdir.'/filelib.php');
require_once($CFG->dirroot.'/filter/tex/lib.php');
require_once($CFG->dirroot.'/filter/tex/latex.php');
$cmd = ''; // Initialise these variables
$status = '';
$relativepath = get_file_argument();
$args = explode('/', trim($relativepath, '/'));
if (count($args) == 1) {
$image = $args[0];
$pathname = $CFG->dataroot.'/filter/tex/'.$image;
} else {
print_error('invalidarguments', 'error');
}
if (!file_exists($pathname)) {
$convertformat = get_config('filter_tex', 'convertformat');
if (strpos($image, '.png')) {
$convertformat = 'png';
}
$md5 = str_replace(".{$convertformat}", '', $image);
if ($texcache = $DB->get_record('cache_filters', array('filter'=>'tex', 'md5key'=>$md5))) {
if (!file_exists($CFG->dataroot.'/filter/tex')) {
make_upload_directory('filter/tex');
}
// try and render with latex first
$latex = new latex();
$density = get_config('filter_tex', 'density');
$background = get_config('filter_tex', 'latexbackground');
$texexp = $texcache->rawtext; // the entities are now decoded before inserting to DB
$lateximage = $latex->render($texexp, $image, 12, $density, $background);
if ($lateximage) {
copy($lateximage, $pathname);
$latex->clean_up($md5);
} else {
// failing that, use mimetex
$texexp = $texcache->rawtext;
$texexp = str_replace('<', '<', $texexp);
$texexp = str_replace('>', '>', $texexp);
$texexp = preg_replace('!\r\n?!', ' ', $texexp);
$texexp = '\Large '.$texexp;
$cmd = filter_tex_get_cmd($pathname, $texexp);
system($cmd, $status);
}
}
}
if (file_exists($pathname)) {
send_file($pathname, $image);
} else {
if (debugging()) {
echo "The shell command
$cmd
returned status = $status
\n";
echo "Image not found!
";
echo "Please try the wwwroot/filter/tex/texdebug.php\">debugging script";
} else {
echo "Image not found!
";
echo "Please try the wwwroot/filter/tex/texdebug.php\">debugging script
";
echo "Please turn on debug mode in site configuration to see more info here.";
}
}