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Annotation of loncom/homework/randomlylabel.pm, revision 1.8

1.1       albertel    1: #!/usr/bin/perl
                      2: # The LearningOnline Network with CAPA
                      3: # randomlabel.png: composite together text and images into 1 image
                      4: #
1.8     ! albertel    5: # $Id: randomlylabel.pm,v 1.7 2003/02/27 21:30:55 albertel Exp $
1.1       albertel    6: #
                      7: # Copyright Michigan State University Board of Trustees
                      8: #
                      9: # This file is part of the LearningOnline Network with CAPA (LON-CAPA).
                     10: #
                     11: # LON-CAPA is free software; you can redistribute it and/or modify
                     12: # it under the terms of the GNU General Public License as published by
                     13: # the Free Software Foundation; either version 2 of the License, or
                     14: # (at your option) any later version.
                     15: #
                     16: # LON-CAPA is distributed in the hope that it will be useful,
                     17: # but WITHOUT ANY WARRANTY; without even the implied warranty of
                     18: # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
                     19: # GNU General Public License for more details.
                     20: #
                     21: # You should have received a copy of the GNU General Public License
                     22: # along with LON-CAPA; if not, write to the Free Software
                     23: # Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
                     24: #
                     25: # /home/httpd/html/adm/gpl.txt
                     26: #
                     27: # http://www.lon-capa.org/
                     28: #
                     29: ###
                     30: 
                     31: package Apache::randomlylabel;
                     32: 
                     33: use strict;
                     34: use Image::Magick;
                     35: use Apache::Constants qw(:common);
                     36: use Apache::loncommon();
1.3       albertel   37: use GD;
                     38: 
                     39: sub get_image {
                     40:     my ($imgsrc,$set_trans)=@_;
                     41:     my $image;
1.5       www        42:     if ($imgsrc !~ /\.(png|jpg|jpeg)$/i) {
1.3       albertel   43: 	my $conv_image = Image::Magick->new;
                     44: 	my $current_figure = $conv_image->Read('filename'=>$imgsrc);
                     45: 	$conv_image->Set('magick'=>'png');
                     46: 	my @blobs=$conv_image->ImageToBlob();
                     47: 	undef $conv_image;
                     48: 	$image = GD::Image->new($blobs[0]);
                     49:     } else {
1.6       albertel   50: 	GD::Image->trueColor(1);
1.3       albertel   51: 	$image = GD::Image->new($imgsrc);
                     52:     }
                     53:     if ($set_trans) {
                     54: 	my $white=$image->colorExact(255,255,255);
                     55: 	if ($white != -1) { $image->transparent($white); }
                     56:     }
                     57:     return $image;
                     58: }
1.1       albertel   59: 
                     60: sub handler {
                     61:     my $r = shift;
                     62:     $r->content_type('image/png');
                     63:     my (undef,$token) = split(/=/,$ENV{'QUERY_STRING'});
                     64:     &Apache::loncommon::get_unprocessed_cgi(
                     65:                &Apache::lonnet::unescape($ENV{'imagerequest.'.$token}));
1.3       albertel   66:     my $image=&get_image($ENV{"form.BGIMG"},0);
1.4       matthew    67:     if (! defined($image)) {
1.6       albertel   68:         &Apache::lonnet::logthis('Unable to create image object for '.
                     69: 				 $ENV{"form.BGIMG"});
1.4       matthew    70:         return OK;
                     71:     }
1.1       albertel   72:     #binmode(STDOUT);
1.8     ! albertel   73:     my $black;
        !            74:     if (!($black=$image->colorResolve(0,0,0))) {
        !            75: 	$black = $image->colorClosestHWB(0,0,0);
        !            76:     }
1.1       albertel   77:     for(my $i=0;$i<$ENV{"form.ICOUNT"};$i++) {
1.3       albertel   78: 	my $subimage=&get_image($ENV{"form.IMG$i"},1);
                     79: 	$image->copy($subimage,$ENV{"form.X$i"},$ENV{"form.Y$i"},
                     80: 		     0,0,$subimage->getBounds());
1.1       albertel   81:     }
1.3       albertel   82:     my $height=GD::Font->Giant->height;
1.1       albertel   83:     for(my $i=0;$i<$ENV{"form.COUNT"};$i++) {
1.3       albertel   84: 	$image->string(gdGiantFont,$ENV{"form.X$i"},$ENV{"form.Y$i"}-$height,
                     85: 		       $ENV{"form.LB$i"},$black);
1.1       albertel   86:     }
1.3       albertel   87:     $r->print($image->png);
1.1       albertel   88:     return OK;
                     89: }
                     90: 
                     91: 1;