version 1.23, 2005/02/23 15:51:48
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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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=head1 Syntax of randomlylabel commands |
=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 |
=over 4 |
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=item BGIMG |
=item BGIMG |
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/home/... file or href (href must contain http://...) |
/home/... file |
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/res/ ... URL |
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or href (href must contain http://...) |
Expected to be HTTP escaped |
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 |
=item OBJCOUNT |
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a number |
a number |
Line 78 The argumants for the possible object ty
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Line 94 The argumants for the possible object ty
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x1:y1:x2:y2:color:thickness |
x1:y1:x2:y2:color:thickness |
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=item RECTANGLE |
=item RECTANGLE |
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x1:y1:x2:y2:color:thickness:filled |
x1:y1:x2:y2:color:thickness:filled |
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Line 104 x:y:file:transparent:srcX:srcY:destW:des
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Line 120 x:y:file:transparent:srcX:srcY:destW:des
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=over 4 |
=over 4 |
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=item srcX,srcY,srcW,srcH |
=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 |
the start and extant of the region in file to copy to x,y with width/height |
destW destH |
destW destH |
Line 113 the start and extant of the region in fi
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Line 129 the start and extant of the region in fi
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=item LABEL |
=item LABEL |
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x:y:text:font:color:direction |
x:y:text:font:color:direction:rotation |
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=over 4 |
=over 4 |
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Line 130 installed TTF font and point size
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Line 146 installed TTF font and point size
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either B<horizontal> or B<vertical> |
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 |
=back |
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=item POLYGON |
=item POLYGON |
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color:width:open:filled |
color:width:open:filled |
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=over 4 |
=over 4 |
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=item open |
=item open |
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Line 155 The possible values for this for the dif
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Line 177 The possible values for this for the dif
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=over 4 |
=over 4 |
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=item POLYGON |
=item POLYGON |
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a list of coords in the form |
a list of coords in the form |
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Line 185 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; |
use GD::Polyline(); |
use GD::Polyline(); |
use LWP::UserAgent(); |
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 !~ m|^(/home/)|) { |
if ($imgsrc !~ m|^(/home/)|) { |
if ($imgsrc !~ /^http:/) { |
if ($imgsrc !~ /^https?\:/) { |
$imgsrc="http://".$ENV{'HTTP_HOST'}.$imgsrc; |
$imgsrc=&Apache::lonnet::absolute_url($ENV{'HTTP_HOST'}).$imgsrc; |
} |
} |
my $ua=new LWP::UserAgent; |
my $ua=new LWP::UserAgent; |
my $request=new HTTP::Request('GET',"$imgsrc"); |
my $request=new HTTP::Request('GET',"$imgsrc"); |
$request->header(Cookie => $ENV{'HTTP_COOKIE'}); |
$request->header(Cookie => $ENV{'HTTP_COOKIE'}); |
my $file="/tmp/imagetmp".$$; |
my $file="/tmp/imagetmp".$$; |
my $response=$ua->request($request,$file); |
my $response=$ua->request($request,$file); |
if ($response->is_success) { |
if ($response->is_success) { |
if ($response->content_type !~ m-/(png|jpg|jpeg)$-i) { |
if ($response->content_type !~ m-/(png|jpg|jpeg)$-i) { |
my $conv_image = Image::Magick->new; |
my $conv_image = Image::Magick->new; |
Line 247 sub get_color_from_hexstring {
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Line 283 sub get_color_from_hexstring {
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return $imcolor; |
return $imcolor; |
} |
} |
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sub add_click { |
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my ($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; |
$r->content_type('image/png'); |
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$r->send_http_header; |
&Apache::loncommon::get_unprocessed_cgi($ENV{'QUERY_STRING'}); |
my (undef,$id) = split(/=/,$ENV{'QUERY_STRING'}); |
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my $prefix; |
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if ($ENV{'QUERY_STRING'}=~/OBJCOUNT\=/) { |
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$prefix='form.'; |
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} else { |
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$prefix="cgi.$env{'form.token'}."; |
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} |
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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; |
my $image; |
if (defined($ENV{"cgi.$id.BGIMG"})) { |
if (defined($env{$prefix."BGIMG"})) { |
my $bgimg=&Apache::lonnet::unescape($ENV{"cgi.$id.BGIMG"}); |
my $bgimg=&unescape($env{$prefix."BGIMG"}); |
#&Apache::lonnet::logthis("BGIMG is ".$bgimg); |
#&Apache::lonnet::logthis("BGIMG is ".$bgimg); |
$image=&get_image($bgimg,0); |
$image=&get_image($bgimg,0); |
if (! defined($image)) { |
if (! defined($image)) { |
&Apache::lonnet::logthis('Unable to create image object for -'. |
&Apache::lonnet::logthis('Unable to create image object for -'. |
$id.'-'.$bgimg); |
$env{'form.token'}.'-'.$bgimg); |
return OK; |
return OK; |
} |
} |
} elsif (defined($ENV{"cgi.$id.SIZE"})) { |
} elsif (defined($env{$prefix."SIZE"})) { |
my ($width,$height)=split(':',$ENV{"cgi.$id.SIZE"}); |
my ($width,$height)=split(':',$env{$prefix."SIZE"}); |
$image = new GD::Image($width,$height,1); |
$image = new GD::Image($width,$height,1); |
my ($bgcolor)=split(':',$ENV{"cgi.$id.BGCOLOR"}); |
my ($bgcolor)=split(':',$env{$prefix."BGCOLOR"}); |
if ($bgcolor ne 'transparent') { |
if ($bgcolor ne 'transparent') { |
$bgcolor=&get_color_from_hexstring($image,$bgcolor); |
$bgcolor=&get_color_from_hexstring($image,$bgcolor); |
# $image->rectangle(0,0,$width,$height,$bgcolor); |
# $image->rectangle(0,0,$width,$height,$bgcolor); |
Line 276 sub handler {
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Line 352 sub handler {
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$image->transparent($bgcolor); |
$image->transparent($bgcolor); |
} |
} |
} else { |
} else { |
&Apache::lonnet::logthis('Unable to create image object, no info'); |
&Apache::lonnet::logthis('Unable to create image object, no info '.$prefix); |
return OK; |
return OK; |
} |
} |
#binmode(STDOUT); |
#binmode(STDOUT); |
my @objtypes=split(':',$ENV{"cgi.$id.OBJTYPE"}); |
my @objtypes=split(':',$env{$prefix."OBJTYPE"}); |
foreach(my $i=0;$i<$ENV{"cgi.$id.OBJCOUNT"};$i++) { |
foreach(my $i=0;$i<$env{$prefix."OBJCOUNT"};$i++) { |
my $type=shift(@objtypes); |
my $type=shift(@objtypes); |
if ($type eq 'LINE') { |
if ($type eq 'LINE') { |
my ($x1,$y1,$x2,$y2,$color,$thickness)= |
my ($x1,$y1,$x2,$y2,$color,$thickness)= |
split(':',$ENV{"cgi.$id.OBJ$i"}); |
split(':',$env{$prefix."OBJ$i"}); |
my $imcolor=&get_color_from_hexstring($image,$color); |
my $imcolor=&get_color_from_hexstring($image,$color); |
if (!defined($thickness)) { $thickness=1; } |
if (!defined($thickness)) { $thickness=1; } |
$image->setThickness($thickness); |
$image->setThickness($thickness); |
Line 293 sub handler {
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Line 369 sub handler {
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$image->line($x1,$y1,$x2,$y2,$imcolor); |
$image->line($x1,$y1,$x2,$y2,$imcolor); |
} elsif ($type eq 'RECTANGLE') { |
} elsif ($type eq 'RECTANGLE') { |
my ($x1,$y1,$x2,$y2,$color,$thickness,$filled)= |
my ($x1,$y1,$x2,$y2,$color,$thickness,$filled)= |
split(':',$ENV{"cgi.$id.OBJ$i"}); |
split(':',$env{$prefix."OBJ$i"}); |
if ($x1 > $x2) { my $temp=$x1;$x1=$x2;$x2=$temp; } |
if ($x1 > $x2) { my $temp=$x1;$x1=$x2;$x2=$temp; } |
if ($y1 > $y2) { my $temp=$y1;$y1=$y2;$y2=$temp; } |
if ($y1 > $y2) { my $temp=$y1;$y1=$y2;$y2=$temp; } |
my $imcolor=&get_color_from_hexstring($image,$color); |
my $imcolor=&get_color_from_hexstring($image,$color); |
Line 306 sub handler {
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Line 382 sub handler {
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$image->rectangle($x1,$y1,$x2,$y2,$imcolor); |
$image->rectangle($x1,$y1,$x2,$y2,$imcolor); |
} |
} |
} elsif ($type eq 'POLYGON') { |
} elsif ($type eq 'POLYGON') { |
my ($color,$width,$open,$filled)=split(':',$ENV{"cgi.$id.OBJ$i"}); |
my ($color,$width,$open,$filled)=split(':',$env{$prefix."OBJ$i"}); |
my $imcolor=&get_color_from_hexstring($image,$color); |
my $imcolor=&get_color_from_hexstring($image,$color); |
my $polygon = (($open && lc ($open ne 'no')) ? |
my $polygon = (($open && lc ($open ne 'no')) ? |
(new GD::Polyline) : (new GD::Polygon)); |
(new GD::Polyline) : (new GD::Polygon)); |
my $added=0; |
my $added=0; |
foreach my $coord (split('-',$ENV{"cgi.$id.OBJEXTRA$i"})) { |
foreach my $coord (split('-',$env{$prefix."OBJEXTRA$i"})) { |
my ($x,$y)=($coord=~m/\(([0-9]+),([0-9]+)\)/); |
my ($x,$y)=($coord=~m/\(([0-9]+),([0-9]+)\)/); |
$polygon->addPt($x,$y); |
$polygon->addPt($x,$y); |
$added++; |
$added++; |
} |
} |
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$image->setThickness($width); |
$image->setThickness($width); |
if ($added) { |
if ($added) { |
if ($open && lc($open) ne 'no') { |
if ($open && lc($open) ne 'no') { |
Line 329 sub handler {
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Line 404 sub handler {
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} |
} |
} elsif ($type eq 'ARC') { |
} elsif ($type eq 'ARC') { |
my ($x,$y,$width,$height,$start,$end,$color,$thickness,$filled)= |
my ($x,$y,$width,$height,$start,$end,$color,$thickness,$filled)= |
split(':',$ENV{"cgi.$id.OBJ$i"}); |
split(':',$env{$prefix."OBJ$i"}); |
if (!$color) { $color='000000'; } |
if (!$color) { $color='000000'; } |
my $imcolor=&get_color_from_hexstring($image,$color); |
my $imcolor=&get_color_from_hexstring($image,$color); |
if (!defined($thickness)) { $thickness=1; } |
if (!defined($thickness)) { $thickness=1; } |
Line 342 sub handler {
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Line 417 sub handler {
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$image->arc($x,$y,$width,$height,$start,$end,$imcolor); |
$image->arc($x,$y,$width,$height,$start,$end,$imcolor); |
} |
} |
} elsif ($type eq 'FILL') { |
} elsif ($type eq 'FILL') { |
my ($x,$y,$color)=split(':',$ENV{"cgi.$id.OBJ$i"}); |
my ($x,$y,$color)=split(':',$env{$prefix."OBJ$i"}); |
if (!$color) { $color='000000'; } |
if (!$color) { $color='000000'; } |
my $imcolor=&get_color_from_hexstring($image,$color); |
my $imcolor=&get_color_from_hexstring($image,$color); |
$image->fill($x,$y,$imcolor); |
$image->fill($x,$y,$imcolor); |
} elsif ($type eq 'IMAGE') { |
} elsif ($type eq 'IMAGE') { |
my ($x,$y,$file,$transparent,$srcX,$srcY,$destW,$destH,$srcW, |
my ($x,$y,$file,$transparent,$srcX,$srcY,$destW,$destH,$srcW, |
$srcH)=split(':',$ENV{"cgi.$id.OBJ$i"}); |
$srcH)=split(':',$env{$prefix."OBJ$i"}); |
$file=&Apache::lonnet::unescape($file); |
$file=&unescape($file); |
if (!defined($transparent)) { $transparent=1; } |
if (!defined($transparent)) { $transparent=1; } |
my $subimage=&get_image($file,$transparent); |
my $subimage=&get_image($file,$transparent); |
if (!defined($subimage)) { |
if (!defined($subimage)) { |
Line 364 sub handler {
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Line 439 sub handler {
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$image->copyResized($subimage,$x,$y,$srcX,$srcY,$destW,$destH, |
$image->copyResized($subimage,$x,$y,$srcX,$srcY,$destW,$destH, |
$srcW,$srcH); |
$srcW,$srcH); |
} elsif ($type eq 'LABEL') { |
} elsif ($type eq 'LABEL') { |
my ($x,$y,$text,$font,$color,$direction)= |
my ($x,$y,$text,$font,$color,$direction,$rotation)= |
split(':',$ENV{"cgi.$id.OBJ$i"}); |
split(':',$env{$prefix."OBJ$i"}); |
$text=&Apache::lonnet::unescape($text); |
$text=&unescape($text); |
my $imcolor=&get_color_from_hexstring($image,$color); |
my $imcolor=&get_color_from_hexstring($image,$color); |
my $type='normal'; |
my $type='normal'; |
my ($height,$fontref); |
my ($height,$fontref); |
Line 385 sub handler {
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Line 460 sub handler {
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} elsif ($font eq 'giant' || !$font) { |
} elsif ($font eq 'giant' || !$font) { |
$height=GD::Font->Giant->height; |
$height=GD::Font->Giant->height; |
$fontref=GD::gdGiantFont; |
$fontref=GD::gdGiantFont; |
} else { |
} elsif ($image->useFontConfig(1)) { |
$type='ttf'; |
$type='ttf'; |
} |
} |
if ($type eq 'normal' && $direction eq 'vertical') { |
if ($type eq 'normal' && $direction eq 'vertical') { |
Line 394 sub handler {
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Line 469 sub handler {
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$image->string($fontref,$x,$y-$height,$text,$imcolor); |
$image->string($fontref,$x,$y-$height,$text,$imcolor); |
} elsif ($type eq 'ttf') { |
} elsif ($type eq 'ttf') { |
my ($fontname,$ptsize)=split(/\s+/,$font); |
my ($fontname,$ptsize)=split(/\s+/,$font); |
$image->stringFT($imcolor,$fontname,$ptsize,90,$x,$y,$text); |
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); |
} |
} |
} else { |
} else { |
&Apache::lonnet::logthis("randomlylabel unable to handle object of type $type"); |
&Apache::lonnet::logthis("randomlylabel unable to handle object of type $type"); |
} |
} |
} |
} |
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if (exists($env{'form.clickdata'})) { &add_click($image); } |
$image->setThickness(1); |
$image->setThickness(1); |
$r->print($image->png); |
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); |
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} |
return OK; |
return OK; |
} |
} |
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