--- loncom/homework/randomlylabel.pm 2003/02/27 21:30:55 1.7
+++ loncom/homework/randomlylabel.pm 2005/02/23 15:51:48 1.23
@@ -2,7 +2,7 @@
# The LearningOnline Network with CAPA
# randomlabel.png: composite together text and images into 1 image
#
-# $Id: randomlylabel.pm,v 1.7 2003/02/27 21:30:55 albertel Exp $
+# $Id: randomlylabel.pm,v 1.23 2005/02/23 15:51:48 albertel Exp $
#
# Copyright Michigan State University Board of Trustees
#
@@ -26,7 +26,158 @@
#
# http://www.lon-capa.org/
#
-###
+
+=pod
+
+=head1 Syntax of randomlylabel commands
+
+=over 4
+
+=item BGIMG
+
+/home/... file or href (href must contain http://...)
+Expected to be HTTP escaped
+
+=item OBJCOUNT
+
+a number
+
+=item OBJTYPE
+
+a colon seperated list of types, supported types are
+
+ B<LINE> B<RECTANGLE> B<POLYGON> B<ARC> B<FILL> B<IMAGE> B<LABEL>
+
+=item OBJI<num>
+
+arguments for this OBJ
+
+some common arguments are
+
+=over 4
+
+=item x y thickness
+
+are pixel values
+
+=item color
+
+a hexstring, without with out a leading # or x)
+
+=item filled
+
+boolean, (1 or 0)
+
+=back
+
+The argumants for the possible object types are
+
+=over 4
+
+=item LINE
+
+x1:y1:x2:y2:color:thickness
+
+=item RECTANGLE
+
+x1:y1:x2:y2:color:thickness:filled
+
+=item ARC
+
+x:y:width:height:start:end:color:thickness:filled
+
+=over 4
+
+=item start, end
+
+start and ends of the arc (in degrees)
+
+=back
+
+=item FILL
+
+x:y:color
+
+=item IMAGE
+
+x:y:file:transparent:srcX:srcY:destW:destH:srcW:srcH
+
+=over 4
+
+=item srcX,srcY,srcW,srcH
+
+the start and extant of the region in file to copy to x,y with width/height
+ destW destH
+
+=back
+
+=item LABEL
+
+x:y:text:font:color:direction
+
+=over 4
+
+=item text
+
+HTTP escaped string of the text to place on the image
+
+=item font
+
+one of B<tiny>, B<small>, B<medium>, B<large>, B<giant>, or an
+installed TTF font and point size
+
+=item direction
+
+either B<horizontal> or B<vertical>
+
+=back
+
+=item POLYGON
+
+color:width:open:filled
+
+=over 4
+
+=item open
+
+boolean, (1 or 0)
+
+=back
+
+=back
+
+
+=item OBJEXTRAI<num>
+
+extra arguments for object I<num>
+
+The possible values for this for the different object types are
+
+=over 4
+
+=item POLYGON
+
+a list of coords in the form
+
+ (x,y)-(x,y)-(x,y)
+
+(there can be arbitrarily many of these)
+
+=back
+
+=back
+
+=head1 Example
+
+ BGIMG=file
+ OBJTYPE=LINE:LINE:LINE:LINE
+ OBJCOUNT=4
+ OBJ0=xmin:ymin:xmax:ymax:FFFFFF:3
+ OBJ1=xmin:ymax:xmax:ymin:FFFFFF:3
+ OBJ2=xmin:ymin:xmax:ymax:FF0000:1
+ OBJ3=xmin:ymax:xmax:ymin:FF0000:1
+
+=cut
package Apache::randomlylabel;
@@ -35,52 +186,221 @@ 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 $image;
- if ($imgsrc !~ /\.(png|jpg|jpeg)$/i) {
+ if ($imgsrc !~ m|^(/home/)|) {
+ if ($imgsrc !~ /^http:/) {
+ $imgsrc="http://".$ENV{'HTTP_HOST'}.$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);
+ 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('type'=>'TrueColor');
+ $conv_image->Set('magick'=>'png');
+ my @blobs=$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);
+ $conv_image->Set('type'=>'TrueColor');
$conv_image->Set('magick'=>'png');
my @blobs=$conv_image->ImageToBlob();
undef $conv_image;
$image = GD::Image->new($blobs[0]);
} else {
- GD::Image->trueColor(1);
+ $image = GD::Image->trueColor(1);
$image = GD::Image->new($imgsrc);
}
- if ($set_trans) {
+ if ($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'; }
+ $color=~s/^[x\#]//;
+ my (undef,$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}));
- my $image=&get_image($ENV{"form.BGIMG"},0);
- if (! defined($image)) {
- &Apache::lonnet::logthis('Unable to create image object for '.
- $ENV{"form.BGIMG"});
- return OK;
+ $r->send_http_header;
+ my (undef,$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;
}
#binmode(STDOUT);
- my $black = $image->colorAllocate(0,0,0);
- for(my $i=0;$i<$ENV{"form.ICOUNT"};$i++) {
- my $subimage=&get_image($ENV{"form.IMG$i"},1);
- $image->copy($subimage,$ENV{"form.X$i"},$ENV{"form.Y$i"},
- 0,0,$subimage->getBounds());
- }
- my $height=GD::Font->Giant->height;
- for(my $i=0;$i<$ENV{"form.COUNT"};$i++) {
- $image->string(gdGiantFont,$ENV{"form.X$i"},$ENV{"form.Y$i"}-$height,
- $ENV{"form.LB$i"},$black);
+ my @objtypes=split(':',$ENV{"cgi.$id.OBJTYPE"});
+ foreach(my $i=0;$i<$ENV{"cgi.$id.OBJCOUNT"};$i++) {
+ my $type=shift(@objtypes);
+ if ($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,$y2,$imcolor);
+ } 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,$filled)=split(':',$ENV{"cgi.$id.OBJ$i"});
+ my $imcolor=&get_color_from_hexstring($image,$color);
+ my $polygon = (($open && lc ($open ne 'no')) ?
+ (new GD::Polyline) : (new GD::Polygon));
+ my $added=0;
+ foreach my $coord (split('-',$ENV{"cgi.$id.OBJEXTRA$i"})) {
+ my ($x,$y)=($coord=~m/\(([0-9]+),([0-9]+)\)/);
+ $polygon->addPt($x,$y);
+ $added++;
+ }
+
+ $image->setThickness($width);
+ if ($added) {
+ if ($open && lc($open) ne 'no') {
+ $image->polydraw($polygon,$imcolor);
+ } elsif ($filled && lc($filled) ne 'no') {
+ $image->filledPolygon($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,$transparent,$srcX,$srcY,$destW,$destH,$srcW,
+ $srcH)=split(':',$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 '.
+ $file);
+ next;
+ }
+ if (!defined($srcW) or !$srcW) {$srcW=($subimage->getBounds())[0];}
+ if (!defined($srcH) or !$srcH) {$srcH=($subimage->getBounds())[1];}
+ if (!defined($destW) or !$destW) { $destW=$srcW; }
+ if (!defined($destH) or !$destH) { $destH=$srcH; }
+ $image->copyResized($subimage,$x,$y,$srcX,$srcY,$destW,$destH,
+ $srcW,$srcH);
+ } elsif ($type eq 'LABEL') {
+ my ($x,$y,$text,$font,$color,$direction)=
+ split(':',$ENV{"cgi.$id.OBJ$i"});
+ $text=&Apache::lonnet::unescape($text);
+ my $imcolor=&get_color_from_hexstring($image,$color);
+ my $type='normal';
+ my ($height,$fontref);
+ if ($font eq 'tiny') {
+ $height=GD::Font->Tiny->height;
+ $fontref=GD::gdTinyFont;
+ } elsif ($font eq 'small') {
+ $height=GD::Font->Small->height;
+ $fontref=GD::gdSmallFont;
+ } elsif ($font eq 'medium') {
+ $height=GD::Font->MediumBold->height;
+ $fontref=GD::gdMediumBoldFont;
+ } elsif ($font eq 'large') {
+ $height=GD::Font->Large->height;
+ $fontref=GD::gdLargeFont;
+ } elsif ($font eq 'giant' || !$font) {
+ $height=GD::Font->Giant->height;
+ $fontref=GD::gdGiantFont;
+ } else {
+ $type='ttf';
+ }
+ if ($type eq 'normal' && $direction eq 'vertical') {
+ $image->stringUp($fontref,$x,$y-$height,$text,$imcolor);
+ } elsif ($type eq 'normal') {
+ $image->string($fontref,$x,$y-$height,$text,$imcolor);
+ } elsif ($type eq 'ttf') {
+ my ($fontname,$ptsize)=split(/\s+/,$font);
+ $image->stringFT($imcolor,$fontname,$ptsize,90,$x,$y,$text);
+ }
+ } else {
+ &Apache::lonnet::logthis("randomlylabel unable to handle object of type $type");
+ }
}
+ $image->setThickness(1);
$r->print($image->png);
return OK;
}