--- loncom/homework/randomlylabel.pm	2002/11/17 09:43:40	1.3
+++ loncom/homework/randomlylabel.pm	2003/01/23 18:26:10	1.5
@@ -2,7 +2,7 @@
 # The LearningOnline Network with CAPA
 # randomlabel.png: composite together text and images into 1 image
 #
-# $Id: randomlylabel.pm,v 1.3 2002/11/17 09:43:40 albertel Exp $
+# $Id: randomlylabel.pm,v 1.5 2003/01/23 18:26:10 www Exp $
 #
 # Copyright Michigan State University Board of Trustees
 #
@@ -39,7 +39,7 @@ use GD;
 sub get_image {
     my ($imgsrc,$set_trans)=@_;
     my $image;
-    if ($imgsrc !~ /\.(png|jpg|jpeg)$/) {
+    if ($imgsrc !~ /\.(png|jpg|jpeg)$/i) {
 	my $conv_image = Image::Magick->new;
 	my $current_figure = $conv_image->Read('filename'=>$imgsrc);
 	$conv_image->Set('magick'=>'png');
@@ -64,6 +64,10 @@ sub handler {
                &Apache::lonnet::unescape($ENV{'imagerequest.'.$token}));
     &Apache::lonnet::delenv('imagerequest\.'.$token);
     my $image=&get_image($ENV{"form.BGIMG"},0);
+    if (! defined($image)) {
+        &Apache::lonnet::logthis('Unable to create image object for '.$ENV{"form.BGIMG"});
+        return OK;
+    }
     #binmode(STDOUT);
     my $black = $image->colorAllocate(0,0,0);
     for(my $i=0;$i<$ENV{"form.ICOUNT"};$i++) {