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Annotation of loncom/cgi/randomlabel.png, revision 1.1

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: #
        !             5: # $Id$
        !             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: use strict;
        !            32: use Image::Magick;
        !            33: 
        !            34: sub unescape {
        !            35:     my $str=shift;
        !            36:     $str =~ s/%([a-fA-F0-9][a-fA-F0-9])/pack("C",hex($1))/eg;
        !            37:     return $str;
        !            38: }
        !            39: 
        !            40: sub add_to_env {
        !            41:   my ($name,$value)=@_;
        !            42:   if (defined($ENV{$name})) {
        !            43:     if (ref($ENV{$name})) {
        !            44:       #already have multiple values
        !            45:       push(@{ $ENV{$name} },$value);
        !            46:     } else {
        !            47:       #first time seeing multiple values, convert hash entry to an arrayref
        !            48:       my $first=$ENV{$name};
        !            49:       undef($ENV{$name});
        !            50:       push(@{ $ENV{$name} },$first,$value);
        !            51:     }
        !            52:   } else {
        !            53:     $ENV{$name}=$value;
        !            54:   }
        !            55: }
        !            56: 
        !            57: sub get_unprocessed_cgi {
        !            58:   my ($query,$possible_names)= @_;
        !            59:   # $Apache::lonxml::debug=1;
        !            60:   foreach (split(/&/,$query)) {
        !            61:     my ($name, $value) = split(/=/,$_);
        !            62:     $name = &unescape($name);
        !            63:     if (!defined($possible_names) || (grep {$_ eq $name} @$possible_names)) {
        !            64:       $value =~ tr/+/ /;
        !            65:       $value =~ s/%([a-fA-F0-9][a-fA-F0-9])/pack("C",hex($1))/eg;
        !            66:       unless (defined($ENV{'form.'.$name})) { &add_to_env('form.'.$name,$value) };
        !            67:     }
        !            68:   }
        !            69: }
        !            70: 
        !            71: sub main {
        !            72:     print <<END;
        !            73: Content-type: image/png
        !            74: 
        !            75: END
        !            76:     &get_unprocessed_cgi($ENV{'QUERY_STRING'});
        !            77:     my $image = Image::Magick->new;
        !            78: #    foreach my $envkey (sort(keys(%ENV))) {
        !            79: #	print("$envkey => $ENV{$envkey}\n");
        !            80: #    }
        !            81:   my $current_figure = $image->Read('filename'=>$ENV{"form.BGIMG"});
        !            82:     binmode(STDOUT);
        !            83: #    for(my $i=0;$i<$ENV{"form.ICOUNT"};$i++) {
        !            84: #
        !            85: #    }
        !            86:     for(my $i=0;$i<$ENV{"form.COUNT"};$i++) {
        !            87: 	$image->Annotate('text' => $ENV{"form.LB$i"},'x' => $ENV{"form.X$i"},
        !            88: 			 'y' => $ENV{"form.Y$i"}, 'font' => 'Times-Bold',
        !            89: 			 'pointsize' => 18, 'antialias' => 'true');
        !            90:     }
        !            91:     $image->Write('png:-');
        !            92:     my @fonts=$image->QueryFont();
        !            93: #    print(join(':',@fonts));
        !            94: 
        !            95: }
        !            96: 
        !            97: &main();