# The LearningOnline Network with CAPA # programatic image drawing # # $Id: drawimage.pm,v 1.9 2006/05/30 12:45:36 www Exp $ # # Copyright Michigan State University Board of Trustees # # This file is part of the LearningOnline Network with CAPA (LON-CAPA). # # LON-CAPA is free software; you can redistribute it and/or modify # it under the terms of the GNU General Public License as published by # the Free Software Foundation; either version 2 of the License, or # (at your option) any later version. # # LON-CAPA is distributed in the hope that it will be useful, # but WITHOUT ANY WARRANTY; without even the implied warranty of # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the # GNU General Public License for more details. # # You should have received a copy of the GNU General Public License # along with LON-CAPA; if not, write to the Free Software # Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA # # /home/httpd/html/adm/gpl.txt # # http://www.lon-capa.org/ # package Apache::drawimage; use strict; use Apache::loncommon; use lib '/home/httpd/lib/perl/'; use LONCAPA; my %args; my $cgi_id; my @cgi_ids; BEGIN { &Apache::lonxml::register('Apache::drawimage',('drawimage')); } sub start_drawimage { my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_; &Apache::lonxml::register('Apache::drawimage',('text','line','rectangle','arc','fill','polygon','image')); if ($target eq 'web' || $target eq 'tex') { my $new_id=&Apache::loncommon::get_cgi_id(); if ($cgi_id) { push(@cgi_ids,$cgi_id); } else { undef(%args); } $cgi_id=$new_id; } return ''; } sub end_drawimage { my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_; my $result; if ($target eq 'web' || $target eq 'tex') { my $width = &Apache::lonxml::get_param('width',$parstack,$safeeval); my $height =&Apache::lonxml::get_param('height',$parstack,$safeeval); my $bgcolor =&Apache::lonxml::get_param('bgcolor',$parstack,$safeeval); if (!$width) { $width=300; } if (!$height) { $height=300; } $result.="\n"; $args{"cgi.$cgi_id.SIZE"}=join(':',($width,$height)); $args{"cgi.$cgi_id.BGCOLOR"}=join(':',($bgcolor)); &Apache::lonnet::appenv(%args); if (@cgi_ids) { $cgi_id=pop(@cgi_ids); } else { undef($cgi_id); } } elsif ($target eq 'edit') { } elsif ($target eq 'modified') { } &Apache::lonxml::register('Apache::drawimage', ('text','line','rectangle','arc','fill', 'polygon')); return $result; } sub start_text { my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_; my $result; if ($target eq 'web' || $target eq 'tex') { &Apache::lonxml::startredirection(); } return $result; } sub end_text { my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_; my $result; if ($target eq 'web' || $target eq 'tex') { my $x = &Apache::lonxml::get_param('x',$parstack,$safeeval); my $y = &Apache::lonxml::get_param('y',$parstack,$safeeval); my $font = &Apache::lonxml::get_param('font',$parstack,$safeeval); my $color = &Apache::lonxml::get_param('color',$parstack,$safeeval); my $direction = &Apache::lonxml::get_param('direction',$parstack,$safeeval); my $text = &Apache::lonxml::endredirection(); $text = &escape($text); $args{"cgi.$cgi_id.OBJTYPE"}.='LABEL:'; my $i=$args{"cgi.$cgi_id.OBJCOUNT"}++; $args{"cgi.$cgi_id.OBJ$i"}=join(':',($x,$y,$text,$font,$color,$direction)); } return $result; } sub start_line { my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_; my $result; if ($target eq 'web' || $target eq 'tex') { my $x1 = &Apache::lonxml::get_param('x1',$parstack,$safeeval); my $y1 = &Apache::lonxml::get_param('y1',$parstack,$safeeval); my $x2 = &Apache::lonxml::get_param('x2',$parstack,$safeeval); my $y2 = &Apache::lonxml::get_param('y2',$parstack,$safeeval); my $color = &Apache::lonxml::get_param('color',$parstack,$safeeval); my $thickness = &Apache::lonxml::get_param('thickness',$parstack,$safeeval); my $i=$args{"cgi.$cgi_id.OBJCOUNT"}++; $args{"cgi.$cgi_id.OBJ$i"}=join(':',($x1,$y1,$x2,$y2,$color,$thickness)); $args{"cgi.$cgi_id.OBJTYPE"}.='LINE:'; } return $result; } sub end_line { my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_; my $result; return $result; } sub start_rectangle { my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_; my $result; if ($target eq 'web' || $target eq 'tex') { my $x1 = &Apache::lonxml::get_param('x1',$parstack,$safeeval); my $y1 = &Apache::lonxml::get_param('y1',$parstack,$safeeval); my $x2 = &Apache::lonxml::get_param('x2',$parstack,$safeeval); my $y2 = &Apache::lonxml::get_param('y2',$parstack,$safeeval); my $color = &Apache::lonxml::get_param('color',$parstack,$safeeval); my $thickness = &Apache::lonxml::get_param('thickness',$parstack, $safeeval); my $filled = &Apache::lonxml::get_param('filled',$parstack, $safeeval); my $i=$args{"cgi.$cgi_id.OBJCOUNT"}++; $args{"cgi.$cgi_id.OBJ$i"}= join(':',($x1,$y1,$x2,$y2,$color,$thickness,$filled)); $args{"cgi.$cgi_id.OBJTYPE"}.='RECTANGLE:'; } return $result; } sub end_rectangle { my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_; my $result; return $result; } sub start_arc { my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_; my $result; if ($target eq 'web' || $target eq 'tex') { my $x = &Apache::lonxml::get_param('x',$parstack,$safeeval); my $y = &Apache::lonxml::get_param('y',$parstack,$safeeval); my $width = &Apache::lonxml::get_param('width',$parstack,$safeeval); my $height = &Apache::lonxml::get_param('height',$parstack,$safeeval); my $start = &Apache::lonxml::get_param('start',$parstack,$safeeval); my $end = &Apache::lonxml::get_param('end',$parstack,$safeeval); my $color = &Apache::lonxml::get_param('color',$parstack,$safeeval); my $thickness = &Apache::lonxml::get_param('thickness',$parstack,$safeeval); my $filled = &Apache::lonxml::get_param('filled',$parstack,$safeeval); my $i=$args{"cgi.$cgi_id.OBJCOUNT"}++; $args{"cgi.$cgi_id.OBJ$i"}= join(':',($x,$y,$width,$height,$start,$end,$color,$thickness, $filled)); $args{"cgi.$cgi_id.OBJTYPE"}.='ARC:'; } return $result; } sub end_arc { my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_; my $result; return $result; } sub start_fill { my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_; my $result; if ($target eq 'web' || $target eq 'tex') { my $x = &Apache::lonxml::get_param('x',$parstack,$safeeval); my $y = &Apache::lonxml::get_param('y',$parstack,$safeeval); my $color = &Apache::lonxml::get_param('color',$parstack,$safeeval); my $i=$args{"cgi.$cgi_id.OBJCOUNT"}++; $args{"cgi.$cgi_id.OBJ$i"}=join(':',($x,$y,$color)); $args{"cgi.$cgi_id.OBJTYPE"}.='FILL:'; } return $result; } sub end_fill { my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_; my $result; return $result; } my @polygon; sub start_polygon { my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_; my $result; &Apache::lonxml::register('Apache::drawimage',('point')); if ($target eq 'web') { undef(@polygon); } return $result; } sub end_polygon { my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_; my $result; if ($target eq 'web') { my $color=&Apache::lonxml::get_param('color',$parstack,$safeeval); my $filled=&Apache::lonxml::get_param('filled',$parstack,$safeeval); my $open=&Apache::lonxml::get_param('open',$parstack,$safeeval); my $thickness = &Apache::lonxml::get_param('thickness',$parstack, $safeeval); my $i=$args{"cgi.$cgi_id.OBJCOUNT"}++; $args{"cgi.$cgi_id.OBJTYPE"}.='POLYGON:'; $args{"cgi.$cgi_id.OBJ$i"}=join(':',($color,$thickness,$open,$filled)); $args{"cgi.$cgi_id.OBJEXTRA$i"}=join('-',@polygon); } &Apache::lonxml::deregister('Apache::drawimage',('point')); return $result; } sub start_point { my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_; my $result; if ($target eq 'web') { my $x = &Apache::lonxml::get_param('x',$parstack,$safeeval); my $y = &Apache::lonxml::get_param('y',$parstack,$safeeval); push (@polygon,"($x,$y)"); } return $result; } sub end_point { my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_; my $result; return $result; } sub start_image { my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_; my $result; if ($target eq 'web' || $target eq 'tex') { &Apache::lonxml::startredirection(); } return $result; } sub end_image { my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_; my $result; if ($target eq 'web' || $target eq 'tex') { my $bgimg=&Apache::lonxml::endredirection(); my $x = &Apache::lonxml::get_param('x',$parstack,$safeeval); my $y = &Apache::lonxml::get_param('y',$parstack,$safeeval); my $clipx = &Apache::lonxml::get_param('clipx',$parstack,$safeeval); my $clipy = &Apache::lonxml::get_param('clipy',$parstack,$safeeval); my $clipwidth = &Apache::lonxml::get_param('clipwidth',$parstack,$safeeval); my $clipheight = &Apache::lonxml::get_param('clipheight',$parstack,$safeeval); my $scaledwidth = &Apache::lonxml::get_param('scaledwidth',$parstack,$safeeval); my $scaledheight = &Apache::lonxml::get_param('scaledheight',$parstack,$safeeval); my $transparent = &Apache::lonxml::get_param('transparent',$parstack,$safeeval); $bgimg=&Apache::imageresponse::clean_up_image($bgimg); my $i=$args{"cgi.$cgi_id.OBJCOUNT"}++; $args{"cgi.$cgi_id.OBJTYPE"}.='IMAGE:'; $args{"cgi.$cgi_id.OBJ$i"} = join(':',($x,$y,&escape($bgimg),$transparent, $clipx,$clipy,$scaledwidth,$scaledheight,$clipwidth,$clipheight)); } return $result; } 1; __END__