version 1.7, 2003/02/27 21:30:55
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version 1.37.2.1, 2024/07/04 17:55:04
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#!/usr/bin/perl |
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# The LearningOnline Network with CAPA |
# The LearningOnline Network with CAPA |
# randomlabel.png: composite together text and images into 1 image |
# randomlabel.png: composite together text and images into 1 image |
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# http://www.lon-capa.org/ |
# http://www.lon-capa.org/ |
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### |
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=pod |
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=head1 Syntax of randomlylabel commands |
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Required items are: (one of BGIMG or SIZE) and OBJCOUNT |
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=over 4 |
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=item BGIMG |
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/home/... file |
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/res/ ... URL |
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or href (href must contain http://...) |
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Expected to be HTTP escaped |
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=item SIZE |
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width:height |
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Creates a blank canvas of size width,height. |
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=item BGCOLOR |
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either I<transparent> or a color hexstring |
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Sets the background color, if SIZE is used to create a new canvas, |
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I<trasparent> makes the background transparent. |
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=item OBJCOUNT |
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a number |
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=item OBJTYPE |
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a colon seperated list of types, supported types are |
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B<LINE> B<RECTANGLE> B<POLYGON> B<ARC> B<FILL> B<IMAGE> B<LABEL> |
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=item OBJI<num> |
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arguments for this OBJ |
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some common arguments are |
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=over 4 |
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=item x y thickness |
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are pixel values |
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=item color |
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a hexstring, without with out a leading # or x) |
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=item filled |
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boolean, (1 or 0) |
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=back |
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The argumants for the possible object types are |
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=over 4 |
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=item LINE |
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x1:y1:x2:y2:color:thickness |
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=item RECTANGLE |
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x1:y1:x2:y2:color:thickness:filled |
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=item ARC |
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x:y:width:height:start:end:color:thickness:filled |
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=over 4 |
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=item start, end |
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start and ends of the arc (in degrees) |
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=back |
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=item FILL |
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x:y:color |
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=item IMAGE |
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x:y:file:transparent:srcX:srcY:destW:destH:srcW:srcH |
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=over 4 |
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=item srcX,srcY,srcW,srcH |
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the start and extant of the region in file to copy to x,y with width/height |
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destW destH |
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=back |
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=item LABEL |
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x:y:text:font:color:direction:rotation |
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=over 4 |
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=item text |
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HTTP escaped string of the text to place on the image |
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=item font |
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one of B<tiny>, B<small>, B<medium>, B<large>, B<giant>, or an |
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installed TTF font and point size |
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=item direction |
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either B<horizontal> or B<vertical> |
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=item rotation |
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number of degrees to rotate the text, relative to the horizontal. |
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only used if font attribute is set to a freetype font (e.g., helvetica 12), |
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and in that case, if set to a valid value, overrides value set for direction. |
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=back |
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=item POLYGON |
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color:width:open:filled |
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=over 4 |
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=item open |
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boolean, (1 or 0) |
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=back |
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=back |
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=item OBJEXTRAI<num> |
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extra arguments for object I<num> |
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The possible values for this for the different object types are |
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=over 4 |
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=item POLYGON |
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a list of coords in the form |
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(x,y)-(x,y)-(x,y) |
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(there can be arbitrarily many of these) |
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=back |
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=back |
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=head1 Example |
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BGIMG=file |
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OBJTYPE=LINE:LINE:LINE:LINE |
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OBJCOUNT=4 |
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OBJ0=xmin:ymin:xmax:ymax:FFFFFF:3 |
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OBJ1=xmin:ymax:xmax:ymin:FFFFFF:3 |
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OBJ2=xmin:ymin:xmax:ymax:FF0000:1 |
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OBJ3=xmin:ymax:xmax:ymin:FF0000:1 |
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=cut |
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package Apache::randomlylabel; |
package Apache::randomlylabel; |
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Line 34 use strict;
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Line 207 use strict;
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use Image::Magick; |
use Image::Magick; |
use Apache::Constants qw(:common); |
use Apache::Constants qw(:common); |
use Apache::loncommon(); |
use Apache::loncommon(); |
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use Math::Trig(); |
use GD; |
use GD; |
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use GD::Polyline(); |
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use LWP::UserAgent(); |
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use Apache::lonnet; |
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use lib '/home/httpd/lib/perl/'; |
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use LONCAPA; |
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# |
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# Note: Math::Trig is included in the standard perl package for many distros. |
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# |
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# For distros which use rpm the following command will show whether Trig.pm is |
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# included in the system perl: rpm -q --provides perl |grep Math::Trig |
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# |
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# For distros which use deb the following command will show whether Trig.pm is |
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# included in the system perl: dpkg -S perl |grep Math\/Trig\.pm |
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# |
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sub get_image { |
sub get_image { |
my ($imgsrc,$set_trans)=@_; |
my ($imgsrc,$set_trans)=@_; |
my $image; |
my $image; |
if ($imgsrc !~ /\.(png|jpg|jpeg)$/i) { |
if ($imgsrc !~ m|^(/home/)|) { |
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if ($imgsrc !~ /^https?\:/) { |
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$imgsrc=&Apache::lonnet::absolute_url($ENV{'HTTP_HOST'}).$imgsrc; |
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} |
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my $ua=new LWP::UserAgent; |
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my $request=new HTTP::Request('GET',"$imgsrc"); |
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$request->header(Cookie => $ENV{'HTTP_COOKIE'}); |
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my $file="/tmp/imagetmp".$$; |
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my $response=$ua->request($request,$file); |
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if ($response->is_success) { |
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if ($response->content_type !~ m-/(png|jpg|jpeg)$-i) { |
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my $conv_image = Image::Magick->new; |
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my $current_figure = $conv_image->Read('filename'=>$file); |
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$conv_image->Set('type'=>'TrueColor'); |
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$conv_image->Set('magick'=>'png'); |
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my @blobs=$conv_image->ImageToBlob(); |
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undef $conv_image; |
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$image = GD::Image->new($blobs[0]); |
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} else { |
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GD::Image->trueColor(1); |
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$image = GD::Image->new($file); |
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} |
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} |
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} elsif ($imgsrc !~ /\.(png|jpg|jpeg)$/i) { |
my $conv_image = Image::Magick->new; |
my $conv_image = Image::Magick->new; |
my $current_figure = $conv_image->Read('filename'=>$imgsrc); |
my $current_figure = $conv_image->Read('filename'=>$imgsrc); |
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$conv_image->Set('type'=>'TrueColor'); |
$conv_image->Set('magick'=>'png'); |
$conv_image->Set('magick'=>'png'); |
my @blobs=$conv_image->ImageToBlob(); |
my @blobs=$conv_image->ImageToBlob(); |
undef $conv_image; |
undef $conv_image; |
$image = GD::Image->new($blobs[0]); |
$image = GD::Image->new($blobs[0]); |
} else { |
} else { |
GD::Image->trueColor(1); |
$image = GD::Image->trueColor(1); |
$image = GD::Image->new($imgsrc); |
$image = GD::Image->new($imgsrc); |
} |
} |
if ($set_trans) { |
if ($set_trans && defined($image)) { |
my $white=$image->colorExact(255,255,255); |
my $white=$image->colorExact(255,255,255); |
if ($white != -1) { $image->transparent($white); } |
if ($white != -1) { $image->transparent($white); } |
} |
} |
return $image; |
return $image; |
} |
} |
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sub get_color_from_hexstring { |
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my ($image,$color)=@_; |
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if (!$color) { $color='000000'; } |
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$color=~s/^[x\#]//; |
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my (undef,$red,undef,$green,undef,$blue)=split(/(..)/,$color); |
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$red=hex($red);$green=hex($green);$blue=hex($blue); |
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my $imcolor; |
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if (!($imcolor = $image->colorResolve($red,$green,$blue))) { |
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$imcolor = $image->colorClosestHWB($red,$green,$blue); |
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} |
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return $imcolor; |
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} |
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sub add_click { |
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my ($image) = @_; |
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my $length=6; |
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my $bgcolor=&get_color_from_hexstring($image,'FFFFFF'); |
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my $fgcolor=&get_color_from_hexstring($image,'009999'); |
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my ($x,$y) = split(':',$env{'form.clickdata'}); |
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$image->setThickness(3); |
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$image->line($x-$length,$y, $x+$length,$y, $bgcolor); |
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$image->line($x, $y-$length,$x, $y+$length,$bgcolor); |
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$image->setThickness(1); |
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$image->line($x-$length,$y, $x+$length,$y, $fgcolor); |
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$image->line($x, $y-$length,$x, $y+$length,$fgcolor); |
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} |
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sub handler { |
sub handler { |
my $r = shift; |
my $r = shift; |
$r->content_type('image/png'); |
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my (undef,$token) = split(/=/,$ENV{'QUERY_STRING'}); |
&Apache::loncommon::get_unprocessed_cgi($ENV{'QUERY_STRING'}); |
&Apache::loncommon::get_unprocessed_cgi( |
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&Apache::lonnet::unescape($ENV{'imagerequest.'.$token})); |
my $prefix; |
my $image=&get_image($ENV{"form.BGIMG"},0); |
if ($ENV{'QUERY_STRING'}=~/OBJCOUNT\=/) { |
if (! defined($image)) { |
$prefix='form.'; |
&Apache::lonnet::logthis('Unable to create image object for '. |
} else { |
$ENV{"form.BGIMG"}); |
$prefix="cgi.$env{'form.token'}."; |
return OK; |
} |
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my $epsfile; |
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if (defined($env{$prefix."EPSFILE"})) { |
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my $user = $env{'user.name'}.'_'.$env{'user.domain'}; |
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if ($env{$prefix."EPSFILE"} =~ /^\Q$user\E_\d+_\d+_\d+_drawimage\.eps$/) { |
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$epsfile = $Apache::lonnet::perlvar{'lonPrtDir'}.'/'.$env{$prefix."EPSFILE"}; |
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} else { |
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&Apache::lonnet::logthis('Unable to create eps file for image object for -'. |
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$env{'form.token'}.'- for '.$user.' as EPSFILE has '. |
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'unexpected value'); |
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return OK; |
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} |
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} |
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unless ($epsfile) { |
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$r->content_type('image/png'); |
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$r->send_http_header; |
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} |
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my $image; |
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if (defined($env{$prefix."BGIMG"})) { |
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my $bgimg=&unescape($env{$prefix."BGIMG"}); |
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#&Apache::lonnet::logthis("BGIMG is ".$bgimg); |
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$image=&get_image($bgimg,0); |
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if (! defined($image)) { |
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&Apache::lonnet::logthis('Unable to create image object for -'. |
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$env{'form.token'}.'-'.$bgimg); |
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return OK; |
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} |
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} elsif (defined($env{$prefix."SIZE"})) { |
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my ($width,$height)=split(':',$env{$prefix."SIZE"}); |
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$image = new GD::Image($width,$height,1); |
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my ($bgcolor)=split(':',$env{$prefix."BGCOLOR"}); |
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if ($bgcolor ne 'transparent') { |
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$bgcolor=&get_color_from_hexstring($image,$bgcolor); |
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# $image->rectangle(0,0,$width,$height,$bgcolor); |
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$image->fill(0,0,$bgcolor); |
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} else { |
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$bgcolor=&get_color_from_hexstring($image,'FFFFFF'); |
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$image->fill(0,0,$bgcolor); |
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$image->transparent($bgcolor); |
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} |
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} else { |
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&Apache::lonnet::logthis('Unable to create image object, no info '.$prefix); |
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return OK; |
} |
} |
#binmode(STDOUT); |
#binmode(STDOUT); |
my $black = $image->colorAllocate(0,0,0); |
my @objtypes=split(':',$env{$prefix."OBJTYPE"}); |
for(my $i=0;$i<$ENV{"form.ICOUNT"};$i++) { |
foreach(my $i=0;$i<$env{$prefix."OBJCOUNT"};$i++) { |
my $subimage=&get_image($ENV{"form.IMG$i"},1); |
my $type=shift(@objtypes); |
$image->copy($subimage,$ENV{"form.X$i"},$ENV{"form.Y$i"}, |
if ($type eq 'LINE') { |
0,0,$subimage->getBounds()); |
my ($x1,$y1,$x2,$y2,$color,$thickness)= |
} |
split(':',$env{$prefix."OBJ$i"}); |
my $height=GD::Font->Giant->height; |
my $imcolor=&get_color_from_hexstring($image,$color); |
for(my $i=0;$i<$ENV{"form.COUNT"};$i++) { |
if (!defined($thickness)) { $thickness=1; } |
$image->string(gdGiantFont,$ENV{"form.X$i"},$ENV{"form.Y$i"}-$height, |
$image->setThickness($thickness); |
$ENV{"form.LB$i"},$black); |
# $image->setAntiAliased($imcolor); |
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$image->line($x1,$y1,$x2,$y2,$imcolor); |
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} elsif ($type eq 'RECTANGLE') { |
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my ($x1,$y1,$x2,$y2,$color,$thickness,$filled)= |
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split(':',$env{$prefix."OBJ$i"}); |
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if ($x1 > $x2) { my $temp=$x1;$x1=$x2;$x2=$temp; } |
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if ($y1 > $y2) { my $temp=$y1;$y1=$y2;$y2=$temp; } |
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my $imcolor=&get_color_from_hexstring($image,$color); |
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if (!defined($thickness)) { $thickness=1; } |
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$image->setThickness($thickness); |
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# $image->setAntiAliased($imcolor); |
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if ($filled) { |
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$image->filledRectangle($x1,$y1,$x2,$y2,$imcolor); |
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} else { |
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$image->rectangle($x1,$y1,$x2,$y2,$imcolor); |
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} |
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} elsif ($type eq 'POLYGON') { |
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my ($color,$width,$open,$filled)=split(':',$env{$prefix."OBJ$i"}); |
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my $imcolor=&get_color_from_hexstring($image,$color); |
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my $polygon = (($open && lc ($open ne 'no')) ? |
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(new GD::Polyline) : (new GD::Polygon)); |
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my $added=0; |
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foreach my $coord (split('-',$env{$prefix."OBJEXTRA$i"})) { |
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my ($x,$y)=($coord=~m/\(([0-9]+),([0-9]+)\)/); |
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$polygon->addPt($x,$y); |
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$added++; |
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} |
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$image->setThickness($width); |
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if ($added) { |
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if ($open && lc($open) ne 'no') { |
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$image->polydraw($polygon,$imcolor); |
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} elsif ($filled && lc($filled) ne 'no') { |
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$image->filledPolygon($polygon,$imcolor); |
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} else { |
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$image->polygon($polygon,$imcolor); |
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} |
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} |
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} elsif ($type eq 'ARC') { |
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my ($x,$y,$width,$height,$start,$end,$color,$thickness,$filled)= |
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split(':',$env{$prefix."OBJ$i"}); |
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if (!$color) { $color='000000'; } |
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my $imcolor=&get_color_from_hexstring($image,$color); |
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if (!defined($thickness)) { $thickness=1; } |
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$image->setThickness($thickness); |
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# $image->setAntiAliased($imcolor); |
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if ($filled) { |
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$image->filledArc($x,$y,$width,$height,$start,$end, |
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$imcolor); |
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} else { |
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$image->arc($x,$y,$width,$height,$start,$end,$imcolor); |
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} |
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} elsif ($type eq 'FILL') { |
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my ($x,$y,$color)=split(':',$env{$prefix."OBJ$i"}); |
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if (!$color) { $color='000000'; } |
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my $imcolor=&get_color_from_hexstring($image,$color); |
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$image->fill($x,$y,$imcolor); |
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} elsif ($type eq 'IMAGE') { |
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my ($x,$y,$file,$transparent,$srcX,$srcY,$destW,$destH,$srcW, |
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$srcH)=split(':',$env{$prefix."OBJ$i"}); |
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$file=&unescape($file); |
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if (!defined($transparent)) { $transparent=1; } |
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my $subimage=&get_image($file,$transparent); |
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if (!defined($subimage)) { |
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&Apache::lonnet::logthis('Unable to create image object for '. |
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$file); |
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next; |
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} |
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if (!defined($srcW) or !$srcW) {$srcW=($subimage->getBounds())[0];} |
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if (!defined($srcH) or !$srcH) {$srcH=($subimage->getBounds())[1];} |
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if (!defined($destW) or !$destW) { $destW=$srcW; } |
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if (!defined($destH) or !$destH) { $destH=$srcH; } |
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$image->copyResized($subimage,$x,$y,$srcX,$srcY,$destW,$destH, |
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$srcW,$srcH); |
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} elsif ($type eq 'LABEL') { |
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my ($x,$y,$text,$font,$color,$direction,$rotation)= |
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split(':',$env{$prefix."OBJ$i"}); |
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$text=&unescape($text); |
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my $imcolor=&get_color_from_hexstring($image,$color); |
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my $type='normal'; |
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my ($height,$fontref); |
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if ($font eq 'tiny') { |
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$height=GD::Font->Tiny->height; |
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$fontref=GD::gdTinyFont; |
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} elsif ($font eq 'small') { |
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$height=GD::Font->Small->height; |
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$fontref=GD::gdSmallFont; |
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} elsif ($font eq 'medium') { |
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$height=GD::Font->MediumBold->height; |
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$fontref=GD::gdMediumBoldFont; |
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} elsif ($font eq 'large') { |
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$height=GD::Font->Large->height; |
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$fontref=GD::gdLargeFont; |
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} elsif ($font eq 'giant' || !$font) { |
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$height=GD::Font->Giant->height; |
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$fontref=GD::gdGiantFont; |
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} elsif ($image->useFontConfig(1)) { |
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$type='ttf'; |
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} |
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if ($type eq 'normal' && $direction eq 'vertical') { |
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$image->stringUp($fontref,$x,$y-$height,$text,$imcolor); |
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} elsif ($type eq 'normal') { |
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$image->string($fontref,$x,$y-$height,$text,$imcolor); |
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} elsif ($type eq 'ttf') { |
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my ($fontname,$ptsize)=split(/\s+/,$font); |
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my $angle = 0; |
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if ($rotation =~ /^(\-|\+|)\d+(|\.\d*)$/) { |
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$angle = Math::Trig::deg2rad($rotation); |
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} elsif ($direction eq 'vertical') { |
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$angle = Math::Trig::deg2rad(90); |
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} elsif ($direction eq 'horizontal') { |
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$angle = 0; |
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} |
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$image->stringFT($imcolor,$fontname,$ptsize,$angle,$x,$y,$text); |
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} |
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} else { |
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&Apache::lonnet::logthis("randomlylabel unable to handle object of type $type"); |
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} |
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} |
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if (exists($env{'form.clickdata'})) { &add_click($image); } |
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$image->setThickness(1); |
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if ($epsfile) { |
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if (open(my $pipe, "| convert png:- $epsfile")) { |
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print $pipe $image->png; |
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close($pipe); |
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} else { |
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&Apache::lonnet::logthis("randomlylabel unable to open pipe to convert png to eps"); |
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} |
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} else { |
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$r->print($image->png); |
} |
} |
$r->print($image->png); |
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return OK; |
return OK; |
} |
} |
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