--- loncom/homework/randomlylabel.pm	2002/11/13 23:52:41	1.2
+++ loncom/homework/randomlylabel.pm	2004/01/12 19:53:54	1.14
@@ -2,7 +2,7 @@
 # The LearningOnline Network with CAPA
 # randomlabel.png: composite together text and images into 1 image
 #
-# $Id: randomlylabel.pm,v 1.2 2002/11/13 23:52:41 albertel Exp $
+# $Id: randomlylabel.pm,v 1.14 2004/01/12 19:53:54 albertel Exp $
 #
 # Copyright Michigan State University Board of Trustees
 #
@@ -34,34 +34,112 @@ use strict;
 use Image::Magick;
 use Apache::Constants qw(:common);
 use Apache::loncommon();
+use GD();
+use GD::Polyline();
+
+sub get_image {
+    my ($imgsrc,$set_trans)=@_;
+    my $image;
+    if ($imgsrc !~ /\.(png|jpg|jpeg)$/i) {
+	my $conv_image = Image::Magick->new;
+	my $current_figure = $conv_image->Read('filename'=>$imgsrc);
+	$conv_image->Set('magick'=>'png');
+	my @blobs=$conv_image->ImageToBlob();
+	undef $conv_image;
+	$image = GD::Image->new($blobs[0]);
+    } else {
+	GD::Image->trueColor(1);
+	$image = GD::Image->new($imgsrc);
+    }
+    if ($set_trans && defined($image)) {
+	my $white=$image->colorExact(255,255,255);
+	if ($white != -1) { $image->transparent($white); }
+    }
+    return $image;
+}
 
 sub handler {
     my $r = shift;
     $r->content_type('image/png');
-    my (undef,$token) = split(/=/,$ENV{'QUERY_STRING'});
-    &Apache::loncommon::get_unprocessed_cgi(
-               &Apache::lonnet::unescape($ENV{'imagerequest.'.$token}));
-    &Apache::lonnet::delenv('imagerequest\.'.$token);
-    my $image = Image::Magick->new;
-    my $current_figure = $image->Read('filename'=>$ENV{"form.BGIMG"});
+    my (undef,$id) = split(/=/,$ENV{'QUERY_STRING'});
+    my $image=&get_image(&Apache::lonnet::unescape($ENV{"cgi.$id.BGIMG"}),0);
+    if (! defined($image)) {
+        &Apache::lonnet::logthis('Unable to create image object for -'.$id.'-'.
+				 $ENV{"cgi.$id.BGIMG"});
+        return OK;
+    }
     #binmode(STDOUT);
-    for(my $i=0;$i<$ENV{"form.ICOUNT"};$i++) {
-	my $subimage = Image::Magick->new;
-	$subimage->Read('filename' => $ENV{"form.IMG$i"});
-	$image->Composite('x' => $ENV{"form.X$i"},'y' => $ENV{"form.Y$i"},
-			 'compose'=> 'Over', 'image' => $subimage,
-			 'gravity' => 'NorthWest');
-	undef($subimage);
-    }
-    for(my $i=0;$i<$ENV{"form.COUNT"};$i++) {
-	$image->Annotate('text' => $ENV{"form.LB$i"},'x' => $ENV{"form.X$i"},
-			 'y' => $ENV{"form.Y$i"}, 'font' => 'Times-Bold',
-			 'pointsize' => 18, 'antialias' => 'true',
-			 'gravity' => 'NorthWest');
-    }
-    $image->Set('magick'=>'png');
-    my @blobs=$image->ImageToBlob();
-    $r->print($blobs[0]);
+    my $black;
+    if (!($black=$image->colorResolve(0,0,0))) {
+	$black = $image->colorClosestHWB(0,0,0);
+    }
+    for(my $i=0;$i<$ENV{"cgi.$id.ICOUNT"};$i++) {
+	my $subimage=&get_image(&Apache::lonnet::unescape($ENV{"cgi.$id.IMG$i"}),1);
+	if (!defined($subimage)) {
+            &Apache::lonnet::logthis('Unable to create image object for '.
+                                 $ENV{"cgi.$id.BGIMG"});
+            next;
+        }
+	$image->copy($subimage,$ENV{"cgi.$id.IX$i"},$ENV{"cgi.$id.IY$i"},
+		     0,0,$subimage->getBounds());
+    }
+    my $height=GD::Font->Giant->height;
+    for(my $i=0;$i<$ENV{"cgi.$id.COUNT"};$i++) {
+	$image->string(GD::gdGiantFont,$ENV{"cgi.$id.X$i"},
+		       $ENV{"cgi.$id.Y$i"}-$height,
+		       &Apache::lonnet::unescape($ENV{"cgi.$id.LB$i"}),$black);
+    }
+    for(my $i=0;$i<$ENV{"cgi.$id.LINECOUNT"};$i++) {
+	my ($x1,$y1,$x2,$y2,$color,$width)=split(':',$ENV{"cgi.$id.LINE$i"});
+	my (undef,$red,undef,$green,undef,$blue)=split(/(..)/,$color);
+	$red=hex($red);$green=hex($green);$blue=hex($blue);
+	my $imcolor;
+	if (!($imcolor = $image->colorResolve($red,$green,$blue))) {
+	    $imcolor = $image->colorClosestHWB($red,$green,$blue);
+	}
+	$image->setThickness($width);
+       	$image->line($x1,$y1,$x2,$y2,$imcolor);
+    }
+    for(my $i=0;$i<$ENV{"cgi.$id.BOXCOUNT"};$i++) {
+	my ($x1,$y1,$x2,$y2,$color,$width)=split(':',$ENV{"cgi.$id.BOX$i"});
+	if ($x1 > $x2) { my $temp=$x1;$x1=$x2;$x2=$temp; }
+	if ($y1 > $y2) { my $temp=$y1;$y1=$y2;$y2=$temp; }
+	my (undef,$red,undef,$green,undef,$blue)=split(/(..)/,$color);
+	$red=hex($red);$green=hex($green);$blue=hex($blue);
+	my $imcolor;
+	if (!($imcolor = $image->colorResolve($red,$green,$blue))) {
+	    $imcolor = $image->colorClosestHWB($red,$green,$blue);
+	}
+	$image->setThickness($width);
+       	$image->rectangle($x1,$y1,$x2,$y2,$imcolor);
+    }
+    for(my $i=0;$i<$ENV{"cgi.$id.POLYCOUNT"};$i++) {
+	my ($color,$width,$open)=split(':',$ENV{"cgi.$id.POLYOPT$i"});
+	my (undef,$red,undef,$green,undef,$blue)=split(/(..)/,$color);
+	$red=hex($red);$green=hex($green);$blue=hex($blue);
+	my $imcolor;
+	if (!($imcolor = $image->colorResolve($red,$green,$blue))) {
+	    $imcolor = $image->colorClosestHWB($red,$green,$blue);
+	}
+	my $polygon;
+	if ($open) {
+	    $polygon = new GD::Polyline;
+	} else {
+	    $polygon = new GD::Polygon;
+	}
+	foreach my $coord (split('-',$ENV{"cgi.$id.POLY$i"})) {
+	    my ($x,$y)=($coord=~m/\(([0-9]+),([0-9]+)\)/);
+	    $polygon->addPt($x,$y);
+	}
+	$image->setThickness($width);
+	if ($open) {
+	    $image->polydraw($polygon,$imcolor);
+	} else {
+	    $image->polygon($polygon,$imcolor);
+	}
+    }
+    $image->setThickness(1);
+    $r->print($image->png);
     return OK;
 }