[LON-CAPA-cvs] cvs: loncom /homework randomlylabel.pm

[albertel]

albertel		Fri Nov  8 09:37:42 2002 EDT

  Added files:                 
    /loncom/homework	randomlylabel.pm 
  Log:
  - new, server side, handler based randomlabel image/text compositer
  
  

Index: loncom/homework/randomlylabel.pm
+++ loncom/homework/randomlylabel.pm
#!/usr/bin/perl
# The LearningOnline Network with CAPA
# randomlabel.png: composite together text and images into 1 image
#
# $Id: randomlylabel.pm,v 1.1 2002/11/08 14:37:42 albertel Exp $
#
# Copyright Michigan State University Board of Trustees
#
# This file is part of the LearningOnline Network with CAPA (LON-CAPA).
#
# LON-CAPA is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 2 of the License, or
# (at your option) any later version.
#
# LON-CAPA is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with LON-CAPA; if not, write to the Free Software
# Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
#
# /home/httpd/html/adm/gpl.txt
#
# http://www.lon-capa.org/
#
###

package Apache::randomlylabel;

use strict;
use Image::Magick;
use Apache::Constants qw(:common);
use Apache::loncommon();

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"});
    #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' => $subimage);
	undef($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');
    }
    $image->Set('magick'=>'png');
    my @blobs=$image->ImageToBlob();
    $r->print($blobs[0]);
    return OK;
}

1;