--- loncom/homework/randomlylabel.pm 2002/11/08 14:37:42 1.1
+++ loncom/homework/randomlylabel.pm 2004/02/23 23:24:50 1.17
@@ -2,7 +2,7 @@
# 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 $
+# $Id: randomlylabel.pm,v 1.17 2004/02/23 23:24:50 albertel Exp $
#
# Copyright Michigan State University Board of Trustees
#
@@ -34,32 +34,191 @@ use strict;
use Image::Magick;
use Apache::Constants qw(:common);
use Apache::loncommon();
+use GD;
+use GD::Polyline();
+use LWP::UserAgent();
+
+sub get_image {
+ my ($imgsrc,$set_trans)=@_;
+ my $image;
+ &Apache::lonnet::logthis("imagesrc1 is $imgsrc");
+ if ($imgsrc !~ m|^(/home/)|) {
+ &Apache::lonnet::logthis("imagesrc2 is $imgsrc");
+ if ($imgsrc !~ /^http:/) {
+ $imgsrc="http://".$ENV{'HTTP_HOST'}.$imgsrc;
+ }
+ &Apache::lonnet::logthis("imagesrc3 is $imgsrc");
+ &Apache::lonnet::logthis("LWP fetching image $imgsrc");
+ my $ua=new LWP::UserAgent;
+ my $request=new HTTP::Request('GET',"$imgsrc");
+ $request->header(Cookie => $ENV{'HTTP_COOKIE'});
+ my $file="/tmp/imagetmp".$$;
+ my $response=$ua->request($request,$file);
+ &Apache::lonnet::logthis("content is ".$response->content_type);
+ &Apache::lonnet::logthis($response->is_success);
+ &Apache::lonnet::logthis($response->status_line);
+ if ($response->is_success) {
+ if ($response->content_type !~ m-/(png|jpg|jpeg)$-i) {
+ my $conv_image = Image::Magick->new;
+ my $current_figure = $conv_image->Read('filename'=>$file);
+ $conv_image->Set('magick'=>'png');
+ my @blobs=$conv_image->ImageToBlob();
+ undef $conv_image;
+ $image = GD::Image->new($blobs[0]);
+ } else {
+ GD::Image->trueColor(1);
+ $image = GD::Image->new($file);
+ }
+ }
+ } elsif ($imgsrc !~ /\.(png|jpg|jpeg)$/i) {
+ my $conv_image = Image::Magick->new;
+ my $current_figure = $conv_image->Read('filename'=>$imgsrc);
+ &Apache::lonnet::logthis("Read said $current_figure");
+ $conv_image->Set('magick'=>'png');
+ my @blobs=$conv_image->ImageToBlob();
+ undef $conv_image;
+ $image = GD::Image->new($blobs[0]);
+ } else {
+ $image = GD::Image->trueColor(1);
+ $image = GD::Image->new($imgsrc);
+ if (!defined($image)) {
+ &Apache::lonnet::logthis("Read said bluh");
+ } else {
+ &Apache::lonnet::logthis("looks good");
+ }
+ }
+ if ($set_trans && defined($image)) {
+ my $white=$image->colorExact(255,255,255);
+ if ($white != -1) { $image->transparent($white); }
+ }
+ return $image;
+}
+
+sub get_color_from_hexstring {
+ my ($image,$color)=@_;
+ if (!$color) { $color='000000'; }
+ my (undef,$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);
+ }
+ return $imcolor;
+}
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);
+ $r->send_http_header;
+ my (undef,$id) = split(/=/,$ENV{'QUERY_STRING'});
+ my $image;
+ if (defined($ENV{"cgi.$id.BGIMG"})) {
+ my $bgimg=&Apache::lonnet::unescape($ENV{"cgi.$id.BGIMG"});
+ &Apache::lonnet::logthis("BGIMG is ".$bgimg);
+ $image=&get_image($bgimg,0);
+ if (! defined($image)) {
+ &Apache::lonnet::logthis('Unable to create image object for -'.
+ $id.'-'.$bgimg);
+ return OK;
+ }
+ } elsif (defined($ENV{"cgi.$id.SIZE"})) {
+ my ($width,$height)=split(':',$ENV{"cgi.$id.SIZE"});
+ $image = new GD::Image($width,$height,1);
+ my ($bgcolor)=split(':',$ENV{"cgi.$id.BGCOLOR"});
+ if ($bgcolor ne 'transparent') {
+ $bgcolor=&get_color_from_hexstring($image,$bgcolor);
+# $image->rectangle(0,0,$width,$height,$bgcolor);
+ $image->fill(0,0,$bgcolor);
+ } else {
+ $bgcolor=&get_color_from_hexstring($image,'FFFFFF');
+ $image->fill(0,0,$bgcolor);
+ $image->transparent($bgcolor);
+ }
+ } else {
+ &Apache::lonnet::logthis('Unable to create image object, no info');
+ return OK;
}
- 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');
+ #binmode(STDOUT);
+ my @objtypes=split(':',$ENV{"cgi.$id.OBJTYPE"});
+ foreach(my $i=0;$i<$ENV{"cgi.$id.OBJCOUNT"};$i++) {
+ my $type=shift(@objtypes);
+ &Apache::lonnet::logthis("type is $type");
+ if ($type eq 'LINE') {
+ my ($x1,$y1,$x2,$y2,$color,$thickness)=
+ split(':',$ENV{"cgi.$id.OBJ$i"});
+ my $imcolor=&get_color_from_hexstring($image,$color);
+ if (!defined($thickness)) { $thickness=1; }
+ $image->setThickness($thickness);
+ $image->setAntiAliased($imcolor);
+ $image->line($x1,$y1,$x2,$y2,gdAntiAliased);
+ } elsif ($type eq 'RECTANGLE') {
+ my ($x1,$y1,$x2,$y2,$color,$thickness,$filled)=
+ split(':',$ENV{"cgi.$id.OBJ$i"});
+ if ($x1 > $x2) { my $temp=$x1;$x1=$x2;$x2=$temp; }
+ if ($y1 > $y2) { my $temp=$y1;$y1=$y2;$y2=$temp; }
+ my $imcolor=&get_color_from_hexstring($image,$color);
+ if (!defined($thickness)) { $thickness=1; }
+ $image->setThickness($thickness);
+# $image->setAntiAliased($imcolor);
+ if ($filled) {
+ $image->filledRectangle($x1,$y1,$x2,$y2,$imcolor);
+ } else {
+ $image->rectangle($x1,$y1,$x2,$y2,$imcolor);
+ }
+ } elsif ($type eq 'POLYGON') {
+ my ($color,$width,$open)=split(':',$ENV{"cgi.$id.OBJ$i"});
+ my $imcolor=&get_color_from_hexstring($image,$color);
+ my $polygon = (($open) ? (new GD::Polyline) : (new GD::Polygon));
+ foreach my $coord (split('-',$ENV{"cgi.$id.OBJEXTRA$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,$imcolor);
+ }
+ } elsif ($type eq 'ARC') {
+ my ($x,$y,$width,$height,$start,$end,$color,$thickness,$filled)=
+ split(':',$ENV{"cgi.$id.OBJ$i"});
+ if (!$color) { $color='000000'; }
+ my $imcolor=&get_color_from_hexstring($image,$color);
+ if (!defined($thickness)) { $thickness=1; }
+ $image->setThickness($thickness);
+# $image->setAntiAliased($imcolor);
+ if ($filled) {
+ $image->filledArc($x,$y,$width,$height,$start,$end,
+ $imcolor);
+ } else {
+ $image->arc($x,$y,$width,$height,$start,$end,$imcolor);
+ }
+ } elsif ($type eq 'FILL') {
+ my ($x,$y,$color)=split(':',$ENV{"cgi.$id.OBJ$i"});
+ if (!$color) { $color='000000'; }
+ my $imcolor=&get_color_from_hexstring($image,$color);
+ $image->fill($x,$y,$imcolor);
+ } elsif ($type eq 'IMAGE') {
+ my ($x,$y,$file,$transparent)=split(':',$ENV{"cgi.$id.OBJ$i"});
+ $file=&Apache::lonnet::unescape($file);
+ if (!defined($transparent)) { $transparent=1; }
+ my $subimage=&get_image($file,$transparent);
+ if (!defined($subimage)) {
+ &Apache::lonnet::logthis('Unable to create image object for '.
+ $file);
+ next;
+ }
+ $image->copy($subimage,$x,$y,0,0,$subimage->getBounds());
+ } elsif ($type eq 'LABEL') {
+ my ($x,$y,$text,$font,$color)=split(':',$ENV{"cgi.$id.OBJ$i"});
+ $text=&Apache::lonnet::unescape($text);
+ my $imcolor=&get_color_from_hexstring($image,$color);
+ my $height=GD::Font->Giant->height;
+ $image->string(GD::gdGiantFont,$x,$y-$height,$text,$imcolor);
+ }
}
- $image->Set('magick'=>'png');
- my @blobs=$image->ImageToBlob();
- $r->print($blobs[0]);
+ $image->setThickness(1);
+ $r->print($image->png);
return OK;
}