thepurpleblob
18a2407ef4
be used if it works on the server, otherwise mimetex is used as before. Produces rather nicer images, and the full range of formatting can be used, rather than mimetex's limited set.
108 lines
4.6 KiB
PHP
108 lines
4.6 KiB
PHP
<?PHP // $Id$
|
|
// This function fetches math. images from the data directory
|
|
// If not, it obtains the corresponding TeX expression from the cache_tex db table
|
|
// and uses mimeTeX to create the image file
|
|
|
|
$nomoodlecookie = true; // Because it interferes with caching
|
|
|
|
require_once('../../config.php');
|
|
require_once($CFG->libdir.'/filelib.php');
|
|
require_once('latex.php');
|
|
|
|
$CFG->texfilterdir = 'filter/tex';
|
|
$CFG->teximagedir = 'filter/tex';
|
|
|
|
|
|
$cmd = ''; // Initialise these variables
|
|
$status = '';
|
|
|
|
error_reporting(E_ALL);
|
|
|
|
$relativepath = get_file_argument('pix.php');
|
|
|
|
$args = explode('/', trim($relativepath, '/'));
|
|
|
|
if (count($args) == 1) {
|
|
$image = $args[0];
|
|
$pathname = $CFG->dataroot.'/'.$CFG->teximagedir.'/'.$image;
|
|
} else {
|
|
error('No valid arguments supplied');
|
|
}
|
|
|
|
if (!file_exists($pathname)) {
|
|
$md5 = str_replace('.gif','',$image);
|
|
if ($texcache = get_record('cache_filters', 'filter', 'tex', 'md5key', $md5)) {
|
|
if (!file_exists($CFG->dataroot.'/'.$CFG->teximagedir)) {
|
|
make_upload_directory($CFG->teximagedir);
|
|
}
|
|
|
|
// try and render with latex first
|
|
$latex = new latex();
|
|
$latex_path = $latex->render( $texcache->rawtext, $md5, 12, 200, '#FFFFFF' );
|
|
if ($latex_path) {
|
|
copy( $latex_path, $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;
|
|
|
|
if ((PHP_OS == "WINNT") || (PHP_OS == "WIN32") || (PHP_OS == "Windows")) {
|
|
$texexp = str_replace('"','\"',$texexp);
|
|
$cmd = "$CFG->dirroot/$CFG->texfilterdir/mimetex.exe";
|
|
$cmd = str_replace(' ','^ ',$cmd);
|
|
$cmd .= " ++ -e \"$pathname\" -- \"$texexp\"";
|
|
} else if (is_executable("$CFG->dirroot/$CFG->texfilterdir/mimetex")) { /// Use the custom binary
|
|
|
|
$cmd = "$CFG->dirroot/$CFG->texfilterdir/mimetex -e $pathname -- ". escapeshellarg($texexp);
|
|
|
|
} else { /// Auto-detect the right TeX binary
|
|
switch (PHP_OS) {
|
|
|
|
case "Linux":
|
|
$cmd = "\"$CFG->dirroot/$CFG->texfilterdir/mimetex.linux\" -e \"$pathname\" -- ". escapeshellarg($texexp);
|
|
break;
|
|
|
|
case "Darwin":
|
|
$cmd = "\"$CFG->dirroot/$CFG->texfilterdir/mimetex.darwin\" -e \"$pathname\" -- ". escapeshellarg($texexp);
|
|
break;
|
|
|
|
default: /// Nothing was found, so tell them how to fix it.
|
|
if ($CFG->debug > 7) {
|
|
echo "Make sure you have an appropriate MimeTeX binary here:\n\n";
|
|
echo " $CFG->dirroot/$CFG->texfilterdir/mimetex\n\n";
|
|
echo "and that it has the right permissions set on it as executable program.\n\n";
|
|
echo "You can get the latest binaries for your ".PHP_OS." platform from: \n\n";
|
|
echo " http://moodle.org/download/mimetex/";
|
|
} else {
|
|
echo "Mimetex executable was not found,\n";
|
|
echo "Please turn on debug mode in site configuration to see more info here.";
|
|
}
|
|
die;
|
|
break;
|
|
}
|
|
}
|
|
system($cmd, $status);
|
|
}
|
|
}
|
|
}
|
|
|
|
if (file_exists($pathname)) {
|
|
send_file($pathname, $image);
|
|
} else {
|
|
if ($CFG->debug > 7) {
|
|
echo "The shell command<br />$cmd<br />returned status = $status<br />\n";
|
|
echo "Image not found!<br />";
|
|
echo "Please try the <a href=\"$CFG->wwwroot/$CFG->texfilterdir/texdebug.php\">debugging script</a>";
|
|
} else {
|
|
echo "Image not found!<br />";
|
|
echo "Please try the <a href=\"$CFG->wwwroot/$CFG->texfilterdir/texdebug.php\">debugging script</a><br />";
|
|
echo "Please turn on debug mode in site configuration to see more info here.";
|
|
}
|
|
}
|
|
?>
|