Annotation of loncom/homework/randomlylabel.pm, revision 1.13
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: #
1.13 ! albertel 5: # $Id: randomlylabel.pm,v 1.12 2003/11/11 00:39:33 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();
1.3 albertel 39:
40: sub get_image {
41: my ($imgsrc,$set_trans)=@_;
42: my $image;
1.5 www 43: if ($imgsrc !~ /\.(png|jpg|jpeg)$/i) {
1.3 albertel 44: my $conv_image = Image::Magick->new;
45: my $current_figure = $conv_image->Read('filename'=>$imgsrc);
46: $conv_image->Set('magick'=>'png');
47: my @blobs=$conv_image->ImageToBlob();
48: undef $conv_image;
49: $image = GD::Image->new($blobs[0]);
50: } else {
1.6 albertel 51: GD::Image->trueColor(1);
1.3 albertel 52: $image = GD::Image->new($imgsrc);
53: }
1.9 albertel 54: if ($set_trans && defined($image)) {
1.3 albertel 55: my $white=$image->colorExact(255,255,255);
56: if ($white != -1) { $image->transparent($white); }
57: }
58: return $image;
59: }
1.1 albertel 60:
61: sub handler {
62: my $r = shift;
63: $r->content_type('image/png');
1.11 albertel 64: my (undef,$id) = split(/=/,$ENV{'QUERY_STRING'});
65: my $image=&get_image(&Apache::lonnet::unescape($ENV{"cgi.$id.BGIMG"}),0);
1.4 matthew 66: if (! defined($image)) {
1.11 albertel 67: &Apache::lonnet::logthis('Unable to create image object for -'.$id.'-'.
68: $ENV{"cgi.$id.BGIMG"});
1.4 matthew 69: return OK;
70: }
1.1 albertel 71: #binmode(STDOUT);
1.8 albertel 72: my $black;
73: if (!($black=$image->colorResolve(0,0,0))) {
74: $black = $image->colorClosestHWB(0,0,0);
75: }
1.11 albertel 76: for(my $i=0;$i<$ENV{"cgi.$id.ICOUNT"};$i++) {
77: my $subimage=&get_image(&Apache::lonnet::unescape($ENV{"cgi.$id.IMG$i"}),1);
1.9 albertel 78: if (!defined($subimage)) {
79: &Apache::lonnet::logthis('Unable to create image object for '.
1.11 albertel 80: $ENV{"cgi.$id.BGIMG"});
1.9 albertel 81: next;
82: }
1.11 albertel 83: $image->copy($subimage,$ENV{"cgi.$id.IX$i"},$ENV{"cgi.$id.IY$i"},
1.3 albertel 84: 0,0,$subimage->getBounds());
1.1 albertel 85: }
1.3 albertel 86: my $height=GD::Font->Giant->height;
1.11 albertel 87: for(my $i=0;$i<$ENV{"cgi.$id.COUNT"};$i++) {
1.13 ! albertel 88: $image->string(GD::gdGiantFont,$ENV{"cgi.$id.X$i"},
1.11 albertel 89: $ENV{"cgi.$id.Y$i"}-$height,
90: &Apache::lonnet::unescape($ENV{"cgi.$id.LB$i"}),$black);
91: }
92: for(my $i=0;$i<$ENV{"cgi.$id.LINECOUNT"};$i++) {
93: my ($x1,$y1,$x2,$y2,$color,$width)=split(':',$ENV{"cgi.$id.LINE$i"});
1.10 albertel 94: my (undef,$red,undef,$green,undef,$blue)=split(/(..)/,$color);
95: $red=hex($red);$green=hex($green);$blue=hex($blue);
96: my $imcolor;
97: if (!($imcolor = $image->colorResolve($red,$green,$blue))) {
98: $imcolor = $image->colorClosestHWB($red,$green,$blue);
99: }
100: $image->setThickness($width);
101: $image->line($x1,$y1,$x2,$y2,$imcolor);
1.12 albertel 102: }
103: for(my $i=0;$i<$ENV{"cgi.$id.BOXCOUNT"};$i++) {
104: my ($x1,$y1,$x2,$y2,$color,$width)=split(':',$ENV{"cgi.$id.BOX$i"});
105: if ($x1 > $x2) { my $temp=$x1;$x1=$x2;$x2=$temp; }
106: if ($y1 > $y2) { my $temp=$y1;$y1=$y2;$y2=$temp; }
107: my (undef,$red,undef,$green,undef,$blue)=split(/(..)/,$color);
108: $red=hex($red);$green=hex($green);$blue=hex($blue);
109: my $imcolor;
110: if (!($imcolor = $image->colorResolve($red,$green,$blue))) {
111: $imcolor = $image->colorClosestHWB($red,$green,$blue);
112: }
113: $image->setThickness($width);
114: $image->rectangle($x1,$y1,$x2,$y2,$imcolor);
1.13 ! albertel 115: }
! 116: for(my $i=0;$i<$ENV{"cgi.$id.POLYCOUNT"};$i++) {
! 117: my ($color,$width,$open)=split(':',$ENV{"cgi.$id.POLYOPT$i"});
! 118: my (undef,$red,undef,$green,undef,$blue)=split(/(..)/,$color);
! 119: $red=hex($red);$green=hex($green);$blue=hex($blue);
! 120: my $imcolor;
! 121: if (!($imcolor = $image->colorResolve($red,$green,$blue))) {
! 122: $imcolor = $image->colorClosestHWB($red,$green,$blue);
! 123: }
! 124: my $polygon;
! 125: if ($open) {
! 126: $polygon = new GD::Polyline;
! 127: } else {
! 128: $polygon = new GD::Polygon;
! 129: }
! 130: foreach my $coord (split('-',$ENV{"cgi.$id.POLY$i"})) {
! 131: my ($x,$y)=($coord=~m/\(([0-9]+),([0-9]+)\)/);
! 132: $polygon->addPt($x,$y);
! 133: }
! 134: if ($open) {
! 135: $image->polydraw($polygon,$imcolor);
! 136: } else {
! 137: $image->polygon($polygon,$imcolor);
! 138: }
1.10 albertel 139: }
140: $image->setThickness(1);
1.3 albertel 141: $r->print($image->png);
1.1 albertel 142: return OK;
143: }
144:
145: 1;
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