Annotation of loncom/homework/randomlylabel.pm, revision 1.15
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: #
1.15 ! albertel 5: # $Id: randomlylabel.pm,v 1.14 2004/01/12 19:53:54 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();
1.13 albertel 37: use GD();
38: use GD::Polyline();
1.15 ! albertel 39: use LWP::UserAgent();
1.3 albertel 40:
41: sub get_image {
42: my ($imgsrc,$set_trans)=@_;
43: my $image;
1.15 ! albertel 44: &Apache::lonnet::logthis("imagesrc1 is $imgsrc");
! 45: if ($imgsrc !~ m|^(/home/)|) {
! 46: &Apache::lonnet::logthis("imagesrc2 is $imgsrc");
! 47: if ($imgsrc !~ /^http:/) {
! 48: $imgsrc="http://".$ENV{'HTTP_HOST'}.$imgsrc;
! 49: }
! 50: &Apache::lonnet::logthis("imagesrc3 is $imgsrc");
! 51: &Apache::lonnet::logthis("LWP fetching image $imgsrc");
! 52: my $ua=new LWP::UserAgent;
! 53: my $request=new HTTP::Request('GET',"$imgsrc");
! 54: $request->header(Cookie => $ENV{'HTTP_COOKIE'});
! 55: my $file="/tmp/imagetmp".$$;
! 56: my $response=$ua->request($request,$file);
! 57: &Apache::lonnet::logthis("contetn is ".$response->content_type);
! 58: &Apache::lonnet::logthis($response->is_success);
! 59: &Apache::lonnet::logthis($response->status_line);
! 60: if ($response->is_success) {
! 61: if ($response->content_type !~ m-/(png|jpg|jpeg)$-i) {
! 62: my $conv_image = Image::Magick->new;
! 63: my $current_figure = $conv_image->Read('filename'=>$file);
! 64: $conv_image->Set('magick'=>'png');
! 65: my @blobs=$conv_image->ImageToBlob();
! 66: undef $conv_image;
! 67: $image = GD::Image->new($blobs[0]);
! 68: } else {
! 69: GD::Image->trueColor(1);
! 70: $image = GD::Image->new($file);
! 71: }
! 72: }
! 73: } elsif ($imgsrc !~ /\.(png|jpg|jpeg)$/i) {
1.3 albertel 74: my $conv_image = Image::Magick->new;
75: my $current_figure = $conv_image->Read('filename'=>$imgsrc);
76: $conv_image->Set('magick'=>'png');
77: my @blobs=$conv_image->ImageToBlob();
78: undef $conv_image;
79: $image = GD::Image->new($blobs[0]);
80: } else {
1.6 albertel 81: GD::Image->trueColor(1);
1.3 albertel 82: $image = GD::Image->new($imgsrc);
83: }
1.9 albertel 84: if ($set_trans && defined($image)) {
1.3 albertel 85: my $white=$image->colorExact(255,255,255);
86: if ($white != -1) { $image->transparent($white); }
87: }
88: return $image;
89: }
1.1 albertel 90:
91: sub handler {
92: my $r = shift;
93: $r->content_type('image/png');
1.15 ! albertel 94: $r->send_http_header;
1.11 albertel 95: my (undef,$id) = split(/=/,$ENV{'QUERY_STRING'});
1.15 ! albertel 96: &Apache::lonnet::logthis("BGIMG is ".$ENV{"cgi.$id.BGIMG"});
1.11 albertel 97: my $image=&get_image(&Apache::lonnet::unescape($ENV{"cgi.$id.BGIMG"}),0);
1.4 matthew 98: if (! defined($image)) {
1.11 albertel 99: &Apache::lonnet::logthis('Unable to create image object for -'.$id.'-'.
100: $ENV{"cgi.$id.BGIMG"});
1.4 matthew 101: return OK;
102: }
1.1 albertel 103: #binmode(STDOUT);
1.8 albertel 104: my $black;
105: if (!($black=$image->colorResolve(0,0,0))) {
106: $black = $image->colorClosestHWB(0,0,0);
107: }
1.11 albertel 108: for(my $i=0;$i<$ENV{"cgi.$id.ICOUNT"};$i++) {
109: my $subimage=&get_image(&Apache::lonnet::unescape($ENV{"cgi.$id.IMG$i"}),1);
1.9 albertel 110: if (!defined($subimage)) {
111: &Apache::lonnet::logthis('Unable to create image object for '.
1.11 albertel 112: $ENV{"cgi.$id.BGIMG"});
1.9 albertel 113: next;
114: }
1.11 albertel 115: $image->copy($subimage,$ENV{"cgi.$id.IX$i"},$ENV{"cgi.$id.IY$i"},
1.3 albertel 116: 0,0,$subimage->getBounds());
1.1 albertel 117: }
1.3 albertel 118: my $height=GD::Font->Giant->height;
1.11 albertel 119: for(my $i=0;$i<$ENV{"cgi.$id.COUNT"};$i++) {
1.13 albertel 120: $image->string(GD::gdGiantFont,$ENV{"cgi.$id.X$i"},
1.11 albertel 121: $ENV{"cgi.$id.Y$i"}-$height,
122: &Apache::lonnet::unescape($ENV{"cgi.$id.LB$i"}),$black);
123: }
124: for(my $i=0;$i<$ENV{"cgi.$id.LINECOUNT"};$i++) {
125: my ($x1,$y1,$x2,$y2,$color,$width)=split(':',$ENV{"cgi.$id.LINE$i"});
1.10 albertel 126: my (undef,$red,undef,$green,undef,$blue)=split(/(..)/,$color);
127: $red=hex($red);$green=hex($green);$blue=hex($blue);
128: my $imcolor;
129: if (!($imcolor = $image->colorResolve($red,$green,$blue))) {
130: $imcolor = $image->colorClosestHWB($red,$green,$blue);
131: }
132: $image->setThickness($width);
133: $image->line($x1,$y1,$x2,$y2,$imcolor);
1.12 albertel 134: }
135: for(my $i=0;$i<$ENV{"cgi.$id.BOXCOUNT"};$i++) {
136: my ($x1,$y1,$x2,$y2,$color,$width)=split(':',$ENV{"cgi.$id.BOX$i"});
137: if ($x1 > $x2) { my $temp=$x1;$x1=$x2;$x2=$temp; }
138: if ($y1 > $y2) { my $temp=$y1;$y1=$y2;$y2=$temp; }
139: my (undef,$red,undef,$green,undef,$blue)=split(/(..)/,$color);
140: $red=hex($red);$green=hex($green);$blue=hex($blue);
141: my $imcolor;
142: if (!($imcolor = $image->colorResolve($red,$green,$blue))) {
143: $imcolor = $image->colorClosestHWB($red,$green,$blue);
144: }
145: $image->setThickness($width);
146: $image->rectangle($x1,$y1,$x2,$y2,$imcolor);
1.13 albertel 147: }
148: for(my $i=0;$i<$ENV{"cgi.$id.POLYCOUNT"};$i++) {
149: my ($color,$width,$open)=split(':',$ENV{"cgi.$id.POLYOPT$i"});
150: my (undef,$red,undef,$green,undef,$blue)=split(/(..)/,$color);
151: $red=hex($red);$green=hex($green);$blue=hex($blue);
152: my $imcolor;
153: if (!($imcolor = $image->colorResolve($red,$green,$blue))) {
154: $imcolor = $image->colorClosestHWB($red,$green,$blue);
155: }
156: my $polygon;
157: if ($open) {
158: $polygon = new GD::Polyline;
159: } else {
160: $polygon = new GD::Polygon;
161: }
162: foreach my $coord (split('-',$ENV{"cgi.$id.POLY$i"})) {
163: my ($x,$y)=($coord=~m/\(([0-9]+),([0-9]+)\)/);
164: $polygon->addPt($x,$y);
165: }
1.14 albertel 166: $image->setThickness($width);
1.13 albertel 167: if ($open) {
168: $image->polydraw($polygon,$imcolor);
169: } else {
170: $image->polygon($polygon,$imcolor);
171: }
1.10 albertel 172: }
173: $image->setThickness(1);
1.3 albertel 174: $r->print($image->png);
1.1 albertel 175: return OK;
176: }
177:
178: 1;
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