Import initial

9 files changed, 2570 insertions, 0 deletions

diff --git a/src/SVG/SVG2zinc/Backend.pm b/src/SVG/SVG2zinc/Backend.pm
new file mode 100644
index 0000000..badee67
--- /dev/null
+++ b/src/SVG/SVG2zinc/Backend.pm
@@ -0,0 +1,293 @@
+package SVG::SVG2zinc::Backend;
+#	This program is free software; you can redistribute it and/or
+#	modify it under the terms of the GNU LGPL Libray General Public License
+#	as published by the Free Software Foundation; either version 2
+#	of the License, or (at your option) any later version.
+#
+#	This program 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 Library General Public License for more details.
+#
+#	You should have received a copy of the GNU Library General Public License
+#	along with this program; if not, write to the Free Software
+#	Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA,
+#	or refer to http://www.gnu.org/copyleft/lgpl.html
+#
+##################################################################
+
+#	Backend for SVG2zinc
+#
+#	Copyright 2003-2004
+#	Centre d'?tudes de la Navigation A?rienne
+#
+#	Author: Christophe Mertz <mertz at intuilab dot com>
+#
+#       An abstract class for code generation
+#       Concrete sub-classes can generate code for perl (script / module), tcl,
+#       printing, or direct execution
+#
+# $Id: Backend.pm,v 1.1.1.2 2006-11-16 14:51:45 merlin Exp $
+#############################################################################
+
+use strict;
+use Carp;
+use FileHandle;
+
+use vars qw( $VERSION);
+($VERSION) = sprintf("%d.%02d", q$Revision: 1.1.1.2 $ =~ /(\d+)\.(\d+)/);
+
+sub new {
+    my ($class, %passed_options) = @_;
+    my $self = {};
+    bless $self, $class;
+    $self->_initialize(%passed_options);
+    return $self;
+}
+
+my %new_options = (
+		   -render => 1,
+		   -out => 1,
+		   -in => 1,
+		   -verbose => 1,
+);
+
+sub _initialize {
+    my ($self, %passed_options) = @_;
+    foreach my $opt (keys (%passed_options)) 
+    {
+		if (defined ($new_options{$opt})) 
+		{
+	    	$self->{$opt} = $passed_options{$opt};
+		} 
+		else 
+		{
+	    	carp ("Warning: option $opt unknown for a ".ref($self)."\n");
+		}
+    }
+    $self -> {-render} = 1 unless defined $self -> {-render};
+    croak("undefined mandatory -in options") unless defined $self -> {-in};
+    if (defined $self -> {-out} and $self -> {-out}) 
+    {
+		my $out = $self->{-out};
+		if (ref($out) eq 'GLOB') 
+		{
+	    	## nothing to do, the $out is supposed to be open!?
+		} 
+		else 
+		{
+		    my @reps = split ('::', $out);
+			my $file = $reps [0];
+			for (my $i = 0; $i < @reps - 1; $i++)
+			{
+				if(not -d $file)
+				{
+					if(!mkdir ($file))
+					{
+						print STDERR "##### Error creating directory: $file\n";
+					}
+				}
+				$file .= '/'.$reps [$i + 1];
+			}
+			print STDERR "writing $file...\n";
+			my $fh = FileHandle -> new("> " . $file);
+		    if ($fh) 
+		    {
+				$self->{-filehandle} = $fh;
+		    } 
+		    else 
+		    {
+				carp ("unable to open " . $out);
+		    }
+		}
+    }
+    return $self;
+}
+
+# used by SVG2zinc to know the zinc group in which the svg topgroup  
+# by default: 1
+# currently default need be overriden by PerlClass only, as far as I now!?
+sub _topgroup {
+    my ($self) = @_;
+    if ($self->{-topgroup}) {
+	return $self->{-topgroup};
+    } else {
+	return 1;
+    }
+}
+
+# returns true if code is put in a file
+sub inFile {
+    my ($self) = @_;
+    return (defined $self->{-filehandle});
+}
+
+sub printLines {
+    my ($self, @lines) = @_;
+    if ($self->inFile) {
+	my $fh = $self->{-filehandle};
+	foreach my $l (@lines) {
+	    print $fh "$l\n";
+	}
+    } else {
+	carp "printLines cannot print if no outfile has been given\n";
+    }
+}
+
+sub treatLines {
+    my ($self, @lines) = @_;
+    if ($self->inFile) {
+	$self->printLines(@lines);
+    }
+}
+
+
+## in case of file generation, should print a comment
+## the default is to print comment starting with #
+sub comment {
+    my ($self, @lines) = @_;
+    if ($self->inFile) {
+	foreach my $l (@lines) {
+	    $self->printLines("##  $l");
+	}
+    }
+}
+
+sub close {
+    my ($self) = @_;
+    if ($self->inFile) {
+	$self->{-filehandle}->close;
+    }
+}
+
+sub fileHeader {
+    my ($self) = @_;
+    $self->comment ("", "default Header of SVG::SVG2zinc::Backend", "");
+}
+
+
+sub fileTail {
+    my ($self) = @_;
+    $self->comment ("", "default Tail of SVG::SVG2zinc::Backend", "");
+    $self->close;
+}
+
+
+	
+1;
+
+
+__END__
+
+=head1 NAME
+
+SVG::SVG2zinc::Backend - a virtual class SVG::SVG2zinc svg reader. Sub-class are specialized for different type of generation
+
+=head1 SYNOPSIS
+
+package SVG::SVG2zinc::Backend::SubClass
+
+use SVG::SVG2zinc::Backend;
+
+## some methods definition
+
+....
+
+ ## when using a specialized backend:
+
+ use SVG::SVG2zinc::Backend::SubClass;
+
+ $backend = SVG::SVG2zinc::Backend::SubClass->new(
+	       -out => filename_or_handle,
+               -in => svgfilename,
+	       -verbose => 0|1,
+	       [otheroptions],
+	       );
+
+ $backend->fileHeader();
+
+ $backend->treatLines("lineOfCode1", "lineOfCode2",...);
+
+ $backend->comment("comment1", "comment2", ...);
+
+ $backend->printLines("comment1", "comment2", ...);
+
+ $backend->fileTail();
+
+=head1 DESCRIPTION
+
+SVG::SVG2zinc::Backend is a perl virtual class which should be specialized in sub-classes. It defines
+a common interface ot classes which can for example generate perl code with Tk::Zinc, display
+SVG file in a Tk::Zinc widget, convert svg file in image files (e.g. png) or generate tcl code
+to be used with TkZinc etc...
+
+A backend should provide the following methods:
+
+=over
+
+=item B<new>
+
+This creation class method should accept pairs of (-option => value) as well as the following arguments:
+
+=over
+
+=item B<-out>
+
+A filename or a filehandle ready for writing the output. In same rare cases
+(e.g. the Display backend which only displays the SVG file on the screen,
+this option will not be used)
+
+=item B<-in>
+
+The svg filename. It should be used in comments only in the generated file
+
+=item B<-verbose>
+
+It will be used for letting the backend being verbose
+
+=back
+
+=item B<fileHeader>
+
+Generates the header in the out file, if needed. This method should be called just after creating a backend and prior any treatLines or comment method call.
+
+=item B<treatLines>
+
+Processes the given arguments as lines of code. The arguments are very close to Tk::Zinc perl code. When creating a new backend, using the B<Print> backend can help understanding what are exactly these arguments.
+
+=item B<comment>
+
+Processes the given arguments as comments. Depending on the backend, this method must be redefined so that arguments are treated as comments, or just skipped.
+
+=item B<printLines>
+
+Print in an outfile the given arguments as lines of text. This method should not be re-defined, but used by any Backend which generates code.
+
+=item B<fileTail>
+
+Generate the tail in the out file if needed and closes the out file. This must be the last call.
+
+=back
+
+A backend can use the printLines method to print lines in the generated file.
+
+=head1 SEE ALSO
+
+SVG::SVG2zinc::Backend::Display(3pm), SVG::SVG2zinc::Backend::PerlScript(3pm),
+SVG::SVG2zinc::Backend::TclScript(3pm), SVG::SVG2zinc::Backend::PerlClass(3pm) code
+as examples of SVG::SVG2zinc::Backend subclasses.
+
+SVG::SVG2zinc(3pm)
+
+=head1 AUTHORS
+
+Christophe Mertz <mertz at intuilab dot com> with some help from Daniel Etienne <etienne at cena dot fr>
+
+=head1 COPYRIGHT
+    
+CENA (C) 2003-2004
+
+This program is free software; you can redistribute it and/or modify it under the term of the LGPL licence.
+
+=cut
+
diff --git a/src/SVG/SVG2zinc/Backend/Display.pm.k b/src/SVG/SVG2zinc/Backend/Display.pm.k
new file mode 100644
index 0000000..8da4b9b
--- /dev/null
+++ b/src/SVG/SVG2zinc/Backend/Display.pm.k
@@ -0,0 +1,257 @@
+package SVG::SVG2zinc::Backend::Display;
+#	This program is free software; you can redistribute it and/or
+#	modify it under the terms of the GNU LGPL Libray General Public License
+#	as published by the Free Software Foundation; either version 2
+#	of the License, or (at your option) any later version.
+#
+#	This program 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 Library General Public License for more details.
+#
+#	You should have received a copy of the GNU Library General Public License
+#	along with this program; if not, write to the Free Software
+#	Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA,
+#	or refer to http://www.gnu.org/copyleft/lgpl.html
+#
+##################################################################
+
+#	Backend Class for SVG2zinc to display a svg file in a Tk::Zinc canvas
+# 
+#	Copyright 2003
+#	Centre d'Études de la Navigation Aérienne
+#
+#	Author: Christophe Mertz <mertz at intuilab dot com>
+#
+# $Id: Display.pm.k,v 1.1.1.1 2006-10-20 13:34:31 merlin Exp $
+#############################################################################
+
+use SVG::SVG2zinc::Backend;
+
+@ISA = qw( SVG::SVG2zinc::Backend );
+
+use vars qw( $VERSION);
+($VERSION) = sprintf("%d.%02d", q$Revision: 1.1.1.1 $ =~ /(\d+)\.(\d+)/);
+
+use strict;
+use Carp;
+use Tk::Zinc::SVGExtension;
+
+eval (require Tk::Zinc);
+if ($@) {
+    die "$@\nSVG::SVG2zinc::Backend requires Tk::Zinc to be installed\n";
+} elsif (eval ('$Tk::Zinc::VERSION !~ /^\d\.\d+$/ or $Tk::Zinc::VERSION < 3.295') ) {
+    die "Tk::Zinc must be at least 3.295";
+}
+
+
+sub new {
+    my ($class, %passed_options) = @_;
+    my $self = {};
+    bless $self, $class;
+    $self->_initialize(%passed_options);
+    return $self;
+}
+
+my $zinc;
+my ($WIDTH, $HEIGHT);
+my $top_group;
+sub _initialize {
+    my ($self, %passed_options) = @_;
+    $WIDTH = delete $passed_options{-width};
+    $WIDTH = 600 unless defined $WIDTH;
+    $HEIGHT = delete $passed_options{-height};
+    $HEIGHT = 600 unless defined $HEIGHT;
+    
+    $self->SUPER::_initialize(%passed_options);
+
+    require Tk::Zinc::Debug; # usefull for browsing items herarchy
+    my $mw = MainWindow->new();
+    my $svgfile = $self->{-in};
+    $mw->title($svgfile);
+    $zinc = $mw->Zinc(-width => $WIDTH, -height => $HEIGHT,
+		      -borderwidth => 0,
+		      -render => $self->{-render},
+		      -backcolor => "white", ## why white?
+		      )->pack(qw/-expand yes -fill both/);
+
+    if (Tk::Zinc::Debug->can('init')) {
+	# for TkZinc >= 3.2.96
+	&Tk::Zinc::Debug::init($zinc, -optionsToDisplay => "-tags", -optionsFormat => "row");
+    } else {
+	# for TkZinc <= 3.2.95
+	&Tk::Zinc::Debug::finditems($zinc);
+	&Tk::Zinc::Debug::tree($zinc, -optionsToDisplay => "-tags", -optionsFormat => "row");
+    }
+}
+
+
+sub treatLines {
+    my ($self,@lines) = @_;
+    my $verbose = $self->{-verbose};
+    foreach my $l (@lines) {
+	my $expr = $l;
+	$expr =~ s/->/\$zinc->/g;
+	my $unused = $zinc; ## due to a perl bug, this is needed so that $zinc will be known in $expr
+	my $r = eval ($expr);
+	if ($@) {
+#	    &myWarn ("While evaluationg:\n$expr\nAn Error occured: $@\n");
+	    print ("While evaluationg:\n$expr\nAn Error occured: $@\n");
+	} elsif ($verbose) {
+	    if ($l =~ /^->add/) {
+		print "$r == $expr\n" if $verbose;
+	    } else {
+		print "$expr\n" if $verbose;
+	    }
+	}
+    }
+}
+
+
+sub fileHeader {
+#    my ($self) = @_;
+}
+
+
+my $zoom;
+sub fileTail {
+    # resizing to make them all visible
+    $top_group = $zinc->find ('withtag', ".1");
+    my @bbox = $zinc->bbox($top_group);
+    $zinc->translate($top_group, -$bbox[0], -$bbox[1]) if defined $bbox[0] and $bbox[1];
+    @bbox = $zinc->bbox($top_group);
+    my $ratio = 1;
+    $ratio = $WIDTH / $bbox[2] if ($bbox[2] and $bbox[2] > $WIDTH);
+    $ratio = $HEIGHT/ $bbox[3] if ($bbox[3] and $HEIGHT/$bbox[3] lt $ratio);
+
+    $zoom=1;
+    $zinc->scale($top_group, $ratio, $ratio);
+
+    # adding some usefull callbacks
+    $zinc->Tk::bind('<ButtonPress-1>', [\&press, \&motion]);
+    $zinc->Tk::bind('<ButtonRelease-1>', [\&release]);
+    
+    $zinc->Tk::bind('<ButtonPress-2>', [\&press, \&zoom]);
+    $zinc->Tk::bind('<ButtonRelease-2>', [\&release]);
+
+    $zinc->Tk::bind('<Control-ButtonPress-1>', [\&press, \&mouseRotate]);
+    $zinc->Tk::bind('<Control-ButtonRelease-1>', [\&release]);
+    $zinc->bind('all', '<Enter>',
+                [ sub { my ($z)=@_; my $i=$z->find('withtag', 'current');
+                        my @tags = $z->gettags($i);
+                        pop @tags; # to remove the tag 'current'
+                        print "$i (", $z->type($i), ") [@tags]\n";}] );
+
+  Tk::MainLoop;
+}
+
+##### bindings for moving, rotating, scaling the displayed items
+my ($cur_x, $cur_y, $cur_angle);
+sub press {
+    my ($zinc, $action) = @_;
+    my $ev = $zinc->XEvent();
+    $cur_x = $ev->x;
+    $cur_y = $ev->y;
+    $cur_angle = atan2($cur_y, $cur_x);
+    $zinc->Tk::bind('<Motion>', [$action]);
+}
+
+sub motion {
+    my ($zinc) = @_;
+    my $ev = $zinc->XEvent();
+    my $lx = $ev->x;
+    my $ly = $ev->y;
+    
+    my @res = $zinc->transform($top_group, [$lx, $ly, $cur_x, $cur_y]);
+    $zinc->translate($top_group, ($res[0] - $res[2])*$zoom, ($res[1] - $res[3])*$zoom);
+    $cur_x = $lx;
+    $cur_y = $ly;
+}
+
+sub zoom {
+    my ($zinc, $self) = @_;
+    my $ev = $zinc->XEvent();
+    my $lx = $ev->x;
+    my $ly = $ev->y;
+    my ($maxx, $maxy);
+    
+    if ($lx > $cur_x) {
+        $maxx = $lx;
+    } else {
+        $maxx = $cur_x;
+    }
+    if ($ly > $cur_y) {
+        $maxy = $ly
+    } else {
+        $maxy = $cur_y;
+    }
+    return if ($maxx == 0 || $maxy == 0);
+    my $sx = 1.0 + ($lx - $cur_x)/$maxx;
+    my $sy = 1.0 + ($ly - $cur_y)/$maxy;
+    $cur_x = $lx;
+    $cur_y = $ly;
+    $zoom = $zoom * $sx;
+    $zinc->scale($top_group, $sx, $sx); #$sy);
+}
+
+sub mouseRotate {
+    my ($zinc) = @_;
+    my $ev = $zinc->XEvent();
+    my $langle = atan2($ev->y, $ev->x);
+    $zinc->rotate($top_group, -($langle - $cur_angle), $cur_x, $cur_y);
+    $cur_angle = $langle;
+}
+
+sub release {
+    my ($zinc) = @_;
+    $zinc->Tk::bind('<Motion>', '');
+}
+
+
+sub displayVersion {
+    print $0, " : Version $VERSION\n\tSVG::SVG2zinc.pm Version : $SVG::SVG2zinc::VERSION\n";
+    exit;
+}
+
+
+1;
+
+
+__END__
+
+=head1 NAME
+
+SVG:SVG2zinc::Backend::Display - a backend class for displaying SVG file
+
+=head1 DESCRIPTION
+
+SVG:SVG2zinc::Backend::Display is a class for displaying SVG files.
+
+For more information, you should look at SVG:SVG2zinc::Backend(3pm).
+
+The new method accepts parameters described in the SVG:SVG2zinc::Backend class and the following additionnal parameters:
+
+=over
+
+=item B<-render>
+
+The render value of the Tk::Zinc widget. 0 means no openGL, 1 or 2 for openGL. Defaults to 1.
+
+=back
+
+=head1 SEE ALSO
+
+SVG::SVG2zinc::Backend(3pm) and SVG::SVG2zinc(3pm)
+
+=head1 AUTHORS
+
+Christophe Mertz <mertz at intuilab dot com>
+
+=head1 COPYRIGHT
+    
+CENA (C) 2003-2004 IntuiLab 2004
+
+This program is free software; you can redistribute it and/or modify it under the term of the LGPL licence.
+
+=cut
+
diff --git a/src/SVG/SVG2zinc/Backend/Image.pm.k b/src/SVG/SVG2zinc/Backend/Image.pm.k
new file mode 100644
index 0000000..bfd7851
--- /dev/null
+++ b/src/SVG/SVG2zinc/Backend/Image.pm.k
@@ -0,0 +1,201 @@
+package SVG::SVG2zinc::Backend::Image;
+#	This program is free software; you can redistribute it and/or
+#	modify it under the terms of the GNU LGPL Libray General Public License
+#	as published by the Free Software Foundation; either version 2
+#	of the License, or (at your option) any later version.
+#
+#	This program 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 Library General Public License for more details.
+#
+#	You should have received a copy of the GNU Library General Public License
+#	along with this program; if not, write to the Free Software
+#	Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA,
+#	or refer to http://www.gnu.org/copyleft/lgpl.html
+#
+##################################################################
+
+#	Backend Class for SVG2zinc to generate image files
+# 
+#	Copyright 2003
+#	Centre d'Études de la Navigation Aérienne
+#
+#	Author: Christophe Mertz <mertz at intuilab dot com>
+#
+# $Id: Image.pm.k,v 1.1.1.1 2006-10-20 13:34:31 merlin Exp $
+#############################################################################
+
+use SVG::SVG2zinc::Backend;
+
+@ISA = qw( SVG::SVG2zinc::Backend );
+
+use vars qw( $VERSION);
+($VERSION) = sprintf("%d.%02d", q$Revision: 1.1.1.1 $ =~ /(\d+)\.(\d+)/);
+
+use strict;
+use Carp;
+use Tk::Zinc::SVGExtension;
+
+eval (require Tk::Zinc);
+if ($@) {
+    print "$@\nSVG::SVG2zinc::Backend requires Tk::Zinc to be installed\n";
+}
+
+sub new {
+    # testing that 'import' is available
+    # is this test portable?
+    my $ret = `which import`;
+    croak ("## You need the 'import' command from 'imagemagic' package to use the Image backend.\n")
+	if !$ret;
+    
+    my ($class, %passed_options) = @_;
+    my $self = {};
+    bless $self, $class;
+    $self->_initialize(%passed_options);
+    return $self;
+}
+
+my $zinc;
+sub _initialize {
+    my ($self, %passed_options) = @_;
+    if (defined $passed_options{-ratio}) {
+	if ($passed_options{-ratio} !~ /^\d+%$/) {
+	    croak ("## -ratio should look like nn%");
+	} else {
+	    $self->{-ratio} = delete $passed_options{-ratio};
+	}
+    }
+    if (defined $passed_options{-width}) {
+	$self->{-width} = delete $passed_options{-width};
+    }
+    if (defined $passed_options{-height}) {
+	$self->{-height} = delete $passed_options{-height};
+    }
+
+    $self->SUPER::_initialize(%passed_options);
+
+    my $mw = MainWindow->new();
+    my $svgfile = $self->{-in};
+    $mw->title($svgfile);
+    my $render = (defined $self->{-render}) ? $self->{-render} : 1;
+    $zinc = $mw->Zinc(-borderwidth => 0,
+		      -render => $render,
+		      -backcolor => "white", ## why white?
+		      )->pack(qw/-expand yes -fill both/);
+}
+
+
+sub treatLines {
+    my ($self,@lines) = @_;
+    my $verbose = $self->{-verbose};
+    foreach my $l (@lines) {
+	my $expr = $l;
+	$expr =~ s/->/\$zinc->/g;
+	my $unused = $zinc; ## due to a perl bug, this is needed so that $zinc will be known in $expr
+	my $r = eval ($expr);
+	if ($@) {
+#	    &myWarn ("While evaluationg:\n$expr\nAn Error occured: $@\n");
+	    print ("While evaluationg:\n$expr\nAn Error occured: $@\n");
+	} elsif ($verbose) {
+	    if ($l =~ /^->add/) {
+		print "$r == $expr\n" if $verbose;
+	    } else {
+		print "$expr\n" if $verbose;
+	    }
+	}
+    }
+}
+
+
+sub fileHeader {
+#    my ($self) = @_;
+}
+
+
+sub fileTail {
+    my ($self) = @_;
+    my $outfile = $self->{-out};
+
+    # to find the top group containing width and height
+    my $svgGroup = $zinc->find('withtag', 'svg_top') ; 
+
+    my $tags = join " ", $zinc->gettags($svgGroup);
+#    print "svgGroup=$svgGroup  => $tags\n";
+    my ($width) = $tags =~ /width=(\d+)/ ;
+    my ($height) = $tags =~ /height=(\d+)/ ;
+#    print "height => $height width => $width\n";
+    
+    $zinc->configure (-width => $width, -height => $height);
+    $zinc->update;
+
+    my $requiredWidth = $self->{-width};
+    my $requiredHeigth = $self->{-height};
+    my $importParams="";
+    if (defined $requiredWidth and defined $requiredHeigth) {
+	$importParams=" -resize $requiredWidth"."x$requiredHeigth";
+    } elsif (defined $self->{-ratio}) {
+	$importParams=" -resize ".$self->{-ratio};
+    }
+#    print "importParams=$importParams\n";
+
+    ## following are for comments:
+    my ($svg2zincPackage) = caller;
+    my $VERSION = eval ( "\$".$svg2zincPackage."::VERSION" );
+    my $svgfile = $self->{-in};
+
+    my $command = "import -window " . $zinc->id . $importParams ." -comment 'created with SVG::SVG2zinc from $svgfile v$VERSION (c) CENA 2003 C.Mertz.' $outfile";
+#    print "command=$command\n";
+    my $return = system ($command);
+
+    if ($return) {
+	## -1 when import is not available
+	print "## To use the Image Backend you need the 'import' command\n";
+	print "## from the 'imagemagick' package on your system\n";
+    }
+}
+
+
+1;
+
+
+__END__
+
+=head1 NAME
+
+SVG:SVG2zinc::Backend::Image - a backend class for generating image file from SVG file
+
+=head1 DESCRIPTION
+
+SVG:SVG2zinc::Backend::Image is a backend class for generating image file from SVG files. It uses the 'import' command included in the ImageMagick package.
+
+For more information, you should look at SVG:SVG2zinc::Backend(3pm).
+
+The new method accepts parameters described in the SVG:SVG2zinc::Backend class and the following additionnal parameters:
+
+=over
+
+=item B<none>
+
+=back
+
+=head1 SEE ALSO
+
+SVG::SVG2zinc::Backend(3pm) and SVG::SVG2zinc(3pm)
+
+=head1 BUGS and LIMITATIONS
+
+This backend generates images files from the content of a displayed Tk::Zinc window. The size (in pixels) of the generated image is thus limited to the maximal size of a window on your system. 
+
+=head1 AUTHORS
+
+Christophe Mertz <mertz at intuilab dot com>
+
+=head1 COPYRIGHT
+    
+CENA (C) 2003-2004 IntuiLab 2004
+
+This program is free software; you can redistribute it and/or modify it under the term of the LGPL licence.
+
+=cut
+
diff --git a/src/SVG/SVG2zinc/Backend/PerlClass.pm b/src/SVG/SVG2zinc/Backend/PerlClass.pm
new file mode 100644
index 0000000..9b47ee7
--- /dev/null
+++ b/src/SVG/SVG2zinc/Backend/PerlClass.pm
@@ -0,0 +1,203 @@
+package SVG::SVG2zinc::Backend::PerlClass;
+#	This program is free software; you can redistribute it and/or
+#	modify it under the terms of the GNU LGPL Libray General Public License
+#	as published by the Free Software Foundation; either version 2
+#	of the License, or (at your option) any later version.
+#
+#	This program 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 Library General Public License for more details.
+#
+#	You should have received a copy of the GNU Library General Public License
+#	along with this program; if not, write to the Free Software
+#	Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA,
+#	or refer to http://www.gnu.org/copyleft/lgpl.html
+#
+##################################################################
+
+#	Backend Class for SVG2zinc
+# 
+#	Copyright 2003-2004
+#	Centre d'?tudes de la Navigation A?rienne
+#
+#	Author: Christophe Mertz <mertz at intuilab dot com>
+#
+#       An concrete class for code generation for Perl Class
+#
+# $Id: PerlClass.pm,v 1.4 2007-03-12 10:25:18 merlin Exp $
+#############################################################################
+
+use SVG::SVG2zinc::Backend;
+use File::Basename;
+
+use Tk::Zinc;
+
+@ISA = qw( SVG::SVG2zinc::Backend );
+
+use vars qw( $VERSION);
+($VERSION) = sprintf("%d.%02d", q$Revision: 1.4 $ =~ /(\d+)\.(\d+)/);
+
+use strict;
+use Carp;
+
+our $current_package_name = '';
+
+sub _initialize {
+    my ($self, %passed_options) = @_;
+    $self->{-topgroup} = '$self->{-topgroup}'; # this code is used by SVG2zinc
+    $self->SUPER::_initialize(%passed_options);
+    $self -> {delayed_lines} = ();
+    $self -> {gradient} = {};
+    $self -> {gradient_id} = 0;
+    return $self;
+}
+
+sub recordGradient {
+	my ($self, $name, $def) = @_;
+	$self -> {gradient} -> {$name} = $def;
+}
+
+sub getGradient {
+	my ($self, $name) = @_;
+	return $self -> {gradient} -> {$name} -> {stops};
+}
+
+sub applyGradient {
+	my ($self, $name, $prop) = @_;
+	my $grad = $self -> {gradient} -> {$name};
+	my $id = $self -> {gradient_id} ++;
+	my %hash = %{$grad};
+	my @lignes = 'my ($x1, $y1, $x2, $y2) = $_zinc -> bbox ($previous);';
+#	push (@lignes, 'my ($parent) = $_zinc -> find(\'ancestors\', $previous);');
+	push (@lignes, '($x1, $y1, $x2, $y2) = $_zinc -> transform(\'device\', $parent, [$x1+1, $y1+1, $x2-2, $y2-2]);');
+	push (@lignes, "my \$grad = getGradient (");
+	push (@lignes, "\t'$current_package_name',");
+	push (@lignes, "\t'$id',");
+	push (@lignes, "\t'".$hash {type}."',");
+	push (@lignes, "\t'".$hash {gradientUnits}."',");
+	push (@lignes, "\t".join (',' , @{$hash{coords}}).",");
+	push (@lignes, "\t'".join ('|' , @{$hash{stops}})."',");
+	push (@lignes, "\t".join (',' , @{$hash{transform}}).",");
+	push (@lignes, "\t\$x1, \$y1, \$x2, \$y2");
+	push (@lignes, ");");
+	push (@lignes, "mconfigure (\$previous, $prop => \$grad);");
+	
+	$self -> {current_gradient} = \@lignes;
+}
+
+sub treatLines {
+    my ($self,@lines) = @_;
+    foreach my $l (@lines) 
+    {
+		$l =~ s/^(\s*)->/$1\$_zinc->/g;
+		$l =~ s/(\W)->/$1\$_zinc->/g;
+		$self -> printLines($l);
+    }
+}
+
+sub dtreatLines {
+    my ($self, @lines) = @_;
+    foreach my $l (@lines) 
+    {
+		$l =~ s/^(\s*)->add/$1\$previous = \$_zinc-> add/g;
+		$l =~ s/(\W)->add/$1\$previous = \$_zinc-> add/g;
+		
+		$l =~ s/^(\s*)->/$1\$_zinc-> /g;
+		$l =~ s/(\W)->/$1\$_zinc-> /g;
+		
+    }
+    if (defined @lines)
+    {
+		my $rule = shift (@lines);
+		push (@{$self -> {delayed_lines}}, $rule);
+    }
+    if (defined $self -> {current_gradient})
+    {
+	    my @grad = @{$self -> {current_gradient}};
+	    foreach my $l (@grad) 
+    	{
+	    	push (@{$self -> {delayed_lines}}, $l);
+    	}
+    	$self -> {current_gradient} = undef;
+    }
+    foreach my $l (@lines) 
+    {
+    	push (@{$self -> {delayed_lines}}, $l);
+    }
+}
+
+sub fileHeader {
+    my ($self) = @_;
+    my $file = $self -> {-in}; # print "file=$file\n";
+    my ($svg2zincPackage) = caller;
+    my $VERSION = eval ( "\$".$svg2zincPackage."::VERSION" );
+    my ($package_name) = $self -> {-out} =~ /(.*)\.pm$/ ;
+	$current_package_name = $package_name;
+	$self -> printLines("package $package_name;
+
+####### This file has been generated from $file by SVG::SVG2zinc.pm Version: $VERSION
+
+");
+    $self->printLines(
+<<'HEADER'
+
+use strict;
+use MTools;
+use MTools::MGroup;
+use vars qw /@ISA @EXPORT @EXPORT_OK/;
+use Tk::PNG;
+
+BEGIN 
+{
+	@ISA = qw /MTools::MGroup/;
+}
+	      
+
+sub new {
+    my ($class, %passed_options) = @_;
+    my $self = {};
+    bless $self, $class;
+
+    my $_zinc = $passed_options {-zinc};
+    croak ("-zinc option is mandatory at instanciation") unless defined $_zinc;
+
+    if (defined $passed_options {-topgroup}) 
+    {
+		$self -> {-topgroup} = $passed_options {-topgroup};
+    }
+    else 
+    {
+		$self -> {-topgroup} = 1;
+    }
+    
+    my $parent = $self -> {-topgroup};
+    my @parents = ();
+    my $previous = ();
+    push (@parents, $parent);
+
+# on now items creation!
+HEADER
+);
+}
+
+
+sub fileTail {
+    my ($self) = @_;
+    $self->comment ("", "Tail of SVG2zinc::Backend::PerlScript", "");
+    unshift (@{$self -> {delayed_lines}}, '$self -> {instance} = $previous = ');
+    $self -> printLines(@{$self -> {delayed_lines}});
+    $self -> printLines(
+<<'TAIL'
+return $self;
+}
+
+1;
+TAIL
+);
+    $self->close;
+}
+
+
+1;
+
diff --git a/src/SVG/SVG2zinc/Backend/PerlScript.pm.k b/src/SVG/SVG2zinc/Backend/PerlScript.pm.k
new file mode 100644
index 0000000..b3b453c
--- /dev/null
+++ b/src/SVG/SVG2zinc/Backend/PerlScript.pm.k
@@ -0,0 +1,275 @@
+package SVG::SVG2zinc::Backend::PerlScript;
+#	This program is free software; you can redistribute it and/or
+#	modify it under the terms of the GNU LGPL Libray General Public License
+#	as published by the Free Software Foundation; either version 2
+#	of the License, or (at your option) any later version.
+#
+#	This program 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 Library General Public License for more details.
+#
+#	You should have received a copy of the GNU Library General Public License
+#	along with this program; if not, write to the Free Software
+#	Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA,
+#	or refer to http://www.gnu.org/copyleft/lgpl.html
+#
+##################################################################
+
+#	Backend Class for SVG2zinc
+# 
+#	Copyright 2003-2004
+#	Centre d'Études de la Navigation Aérienne
+#
+#	Author: Christophe Mertz <mertz at intuilab dot com>
+#
+#       A concrete class for code generation for Perl Scripts
+#
+# $Id: PerlScript.pm.k,v 1.1.1.1 2006-10-20 13:34:31 merlin Exp $
+#############################################################################
+
+use strict;
+use Carp;
+
+use SVG::SVG2zinc::Backend;
+use File::Basename;
+
+use vars qw( $VERSION @ISA  );
+@ISA = qw( SVG::SVG2zinc::Backend );
+($VERSION) = sprintf("%d.%02d", q$Revision: 1.1.1.1 $ =~ /(\d+)\.(\d+)/);
+
+
+sub treatLines {
+    my ($self,@lines) = @_;
+    foreach my $l (@lines) {
+	$l =~ s/->/\$_zinc->/g;
+	$self->printLines($l);
+    }
+}
+
+sub fileHeader {
+    my ($self) = @_;
+    my $svgfile = $self->{-in};
+    my ($svg2zincPackage) = caller;
+    my $VERSION = eval ( "\$".$svg2zincPackage."::VERSION" );
+    $self->printLines("#!/usr/bin/perl -w
+
+####### This file has been generated from $svgfile by SVG::SVG2zinc.pm Version: $VERSION
+");
+
+
+    $self->printLines(
+<<'HEADER'
+use Tk::Zinc 3.295;
+use Tk::Zinc::Debug;
+use Tk::PNG;  # only usefull if loading png file
+use Tk::JPEG; # only usefull if loading png file
+
+use Tk::Zinc::SVGExtension;
+
+my $mw = MainWindow->new();
+HEADER
+		      );
+    my $svgfilename = basename($svgfile);
+    $self->printLines("
+\$mw->title('$svgfile');
+my (\$WIDTH, \$HEIGHT) = (800, 600);
+" );
+    my $render = $self->{-render};
+    $self->printLines("
+my \$zinc = \$mw->Zinc(-width => \$WIDTH, -height => \$HEIGHT,
+		     -borderwidth => 0,
+                     -backcolor => 'white', # why white?
+		     -render => $render,
+		      )->pack(qw/-expand yes -fill both/);;
+");
+
+    $self->printLines(
+<<'HEADER'
+if (Tk::Zinc::Debug->can('init')) {
+    # for TkZinc >= 3.2.96
+    &Tk::Zinc::Debug::init($zinc, -optionsToDisplay => "-tags", -optionsFormat => "row");
+} else {
+    # for TkZinc <= 3.2.95
+    &Tk::Zinc::Debug::finditems($zinc);
+    &Tk::Zinc::Debug::tree($zinc, -optionsToDisplay => "-tags", -optionsFormat => "row");
+}
+
+my $top_group = 1; ###$zinc->add('group', 1);
+
+my $_zinc=$zinc;
+
+{ ###
+
+HEADER
+    );
+}
+
+
+sub fileTail {
+    my ($self) = @_;
+    $self->printLines(
+<<'TAIL'
+	   }
+
+### on va retailler et translater les objets créés!
+
+my @bbox = $_zinc->bbox($top_group);
+$_zinc->translate($top_group, -$bbox[0], -$bbox[1]);
+@bbox = $_zinc->bbox($top_group);
+my $ratio = 1;
+$ratio = $WIDTH / $bbox[2] if ($bbox[2] > $WIDTH);
+$ratio = $HEIGHT/$bbox[3] if ($HEIGHT/$bbox[3] lt $ratio);
+$zinc->scale($top_group, $ratio, $ratio);
+
+### on ajoute quelques binding bien pratiques pour la mise au point
+
+$_zinc->Tk::bind('<ButtonPress-1>', [\&press, \&motion]);
+$_zinc->Tk::bind('<ButtonRelease-1>', [\&release]);
+$_zinc->Tk::bind('<ButtonPress-2>', [\&press, \&zoom]);
+$_zinc->Tk::bind('<ButtonRelease-2>', [\&release]);
+
+# $_zinc->Tk::bind('<ButtonPress-3>', [\&press, \&mouseRotate]);
+# $_zinc->Tk::bind('<ButtonRelease-3>', [\&release]);
+$_zinc->bind('all', '<Enter>',
+	[ sub { my ($z)=@_; my $i=$z->find('withtag', 'current');
+			my @tags = $z->gettags($i);
+			pop @tags; # pour enlever 'current'
+			print "$i (", $z->type($i), ") [@tags]\n";}] );
+
+&Tk::MainLoop;
+
+
+##### bindings for moving, rotating, scaling the items
+my ($cur_x, $cur_y, $cur_angle);
+sub press {
+    my ($zinc, $action) = @_;
+    my $ev = $zinc->XEvent();
+    $cur_x = $ev->x;
+    $cur_y = $ev->y;
+    $cur_angle = atan2($cur_y, $cur_x);
+    $zinc->Tk::bind('<Motion>', [$action]);
+}
+
+sub motion {
+    my ($zinc) = @_;
+    my $ev = $zinc->XEvent();
+    my $lx = $ev->x;
+    my $ly = $ev->y;
+    my @res = $zinc->transform($top_group, [$lx, $ly, $cur_x, $cur_y]);
+    $zinc->translate($top_group, $res[0] - $res[2], $res[1] - $res[3]);
+    $cur_x = $lx;
+    $cur_y = $ly;
+}
+
+sub zoom {
+    my ($zinc, $self) = @_;
+    my $ev = $zinc->XEvent();
+    my $lx = $ev->x;
+    my $ly = $ev->y;
+    my $maxx;
+    my $maxy;
+    my $sx;
+    my $sy;
+    
+    if ($lx > $cur_x) {
+	$maxx = $lx;
+    } else {
+	$maxx = $cur_x;
+    }
+    if ($ly > $cur_y) {
+	$maxy = $ly
+    } else {
+	$maxy = $cur_y;
+    }
+    return if ($maxx == 0 || $maxy == 0);
+    $sx = 1.0 + ($lx - $cur_x)/$maxx;
+    $sy = 1.0 + ($ly - $cur_y)/$maxy;
+    $cur_x = $lx;
+    $cur_y = $ly;
+    $zinc->scale($top_group, $sx, $sx); #$sy);
+}
+
+sub mouseRotate {
+    my ($zinc) = @_;
+    my $ev = $zinc->XEvent();
+    my $lx = $ev->x;
+    my $ly = $ev->y;
+    my $langle = atan2($ly, $lx);
+    $zinc->rotate($top_group, -($langle - $cur_angle));
+    $cur_angle = $langle;
+}
+
+sub release {
+    my ($zinc) = @_;
+    $zinc->Tk::bind('<Motion>', '');
+}
+TAIL
+);
+    $self->close;
+}
+
+
+1;
+
+__END__
+
+=head1 NAME
+
+SVG:SVG2zinc::Backend::PerlScript - a backend class generating Perl script displaying the content of a SVG file
+
+=head1 SYNOPSIS
+
+ use SVG:SVG2zinc::Backend::PerlScript;
+
+ $backend = SVG:SVG2zinc::Backend::PerlScript->new(
+	       -out => filename_or_handle,
+               -in => svgfilename,
+	       -verbose => 0|1,
+	       -render => 0|1|2,
+	       );
+
+ $backend->fileHeader();
+
+ $backend->treatLines("lineOfCode1", "lineOfCode2",...);
+
+ $backend->comment("comment1", "comment2", ...);
+
+ $backend->printLines("comment1", "comment2", ...);
+
+ $backend->fileTail();
+
+=head1 DESCRIPTION
+
+SVG:SVG2zinc::Backend::PerlScript is a class for generating perl script which displays the content of a SVG file. The generated script requires Tk::Zinc.
+
+For more information, you should look at SVG::SVG2zinc::Backend(3pm).
+
+The generated perl script uses the Tk::Zinc::Debug tool, so it is easy to inspect items created in Tk::Zinc. Use the <ESC> key to get some help when the cursor is in the Tk::Zinc window. 
+
+The B<new> method accepts parameters described in the SVG:SVG2zinc::Backend class and the following additionnal parameter:
+
+=over
+
+=item B<-render>
+
+The render option of the Tk::Zinc widget. A value of 0 means no openGL, 1 or 2 for openGL. Defaults to 1.
+
+=back
+
+=head1 SEE ALSO
+
+SVG::SVG2zinc::Backend(3pm) and SVG::SVG2zinc(3pm)
+
+=head1 AUTHORS
+
+Christophe Mertz <mertz at intuilab dot com>
+
+=head1 COPYRIGHT
+    
+CENA (C) 2003-2004 IntuiLab (C) 2004
+
+This program is free software; you can redistribute it and/or modify it under the term of the LGPL licence.
+
+=cut
+
diff --git a/src/SVG/SVG2zinc/Backend/Print.pm.k b/src/SVG/SVG2zinc/Backend/Print.pm.k
new file mode 100644
index 0000000..8e533ac
--- /dev/null
+++ b/src/SVG/SVG2zinc/Backend/Print.pm.k
@@ -0,0 +1,61 @@
+package SVG::SVG2zinc::Backend::Print;
+#	This program is free software; you can redistribute it and/or
+#	modify it under the terms of the GNU LGPL Libray General Public License
+#	as published by the Free Software Foundation; either version 2
+#	of the License, or (at your option) any later version.
+#
+#	This program 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 Library General Public License for more details.
+#
+#	You should have received a copy of the GNU Library General Public License
+#	along with this program; if not, write to the Free Software
+#	Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA,
+#	or refer to http://www.gnu.org/copyleft/lgpl.html
+#
+##################################################################
+
+#	Backend Class for SVG2zinc
+# 
+#	Copyright 2003
+#	Centre d'Études de la Navigation Aérienne
+#
+#	Author: Christophe Mertz <mertz at intuilab dot com>
+#
+#       An concrete class for code printing for Perl Scripts/Modules
+#       This Backend is for svg2zinc debug purpose mainly
+#
+# $Id: Print.pm.k,v 1.1.1.1 2006-10-20 13:34:31 merlin Exp $
+#############################################################################
+
+use SVG::SVG2zinc::Backend;
+
+@ISA = qw( SVG::SVG2zinc::Backend );
+
+use vars qw( $VERSION);
+($VERSION) = sprintf("%d.%02d", q$Revision: 1.1.1.1 $ =~ /(\d+)\.(\d+)/);
+
+use strict;
+use Carp;
+
+sub treatLines {
+    my ($self,@lines) = @_;
+    foreach my $l (@lines) {
+	print "$l\n";
+    }
+}
+
+
+sub fileHeader {
+#    my ($self) = @_;
+}
+
+
+sub fileTail {
+#    my ($self) = @_;
+}
+
+
+1;
+
diff --git a/src/SVG/SVG2zinc/Backend/Tcl.pm.k b/src/SVG/SVG2zinc/Backend/Tcl.pm.k
new file mode 100644
index 0000000..3149ef6
--- /dev/null
+++ b/src/SVG/SVG2zinc/Backend/Tcl.pm.k
@@ -0,0 +1,96 @@
+package SVG::SVG2zinc::Backend::Tcl;
+#	This program is free software; you can redistribute it and/or
+#	modify it under the terms of the GNU LGPL Libray General Public License
+#	as published by the Free Software Foundation; either version 2
+#	of the License, or (at your option) any later version.
+#
+#	This program 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 Library General Public License for more details.
+#
+#	You should have received a copy of the GNU Library General Public License
+#	along with this program; if not, write to the Free Software
+#	Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA,
+#	or refer to http://www.gnu.org/copyleft/lgpl.html
+#
+##################################################################
+
+#	Backend Class for SVG2zinc
+# 
+#	Copyright 2003-2004
+#	Centre d'Études de la Navigation Aérienne
+#
+#	Author: Christophe Mertz <mertz at intuilab dot com>
+#
+#       A module for code translation from perl to tcl generation
+#
+# $Id: Tcl.pm.k,v 1.1.1.1 2006-10-20 13:34:31 merlin Exp $
+#############################################################################
+
+
+use vars qw( $VERSION);
+($VERSION) = sprintf("%d.%02d", q$Revision: 1.1.1.1 $ =~ /(\d+)\.(\d+)/);
+
+@ISA = qw( Exporter );
+@EXPORT = qw( perl2tcl );
+
+use strict;
+use Carp;
+
+
+sub perl2tcl {
+    my (@lines) = @_;
+    my @res;
+    foreach my $l (@lines) {
+
+	$l =~ s/->(\w*)\((.*)\)/\$w\.zinc $1 $2/g;  # ->add(....) => $w.zinc add ...
+
+	$l =~ s/\s*,\s*/ /g;  # replacing commas by spaces
+	$l =~ s/\s*=>\s*/ /g;  # replacing => by spaces
+
+ 	$l =~ s/\s*\'([^\s;]+)\'\s*/ $1 /g ;  # removing single-quotes around string without spaces
+	$l =~ s/\s*\"([^\s;]+)\"\s*/ $1 /g ;  # removing double-quotes around string without spaces
+	$l =~ s/([\"\s])\#/$1\\\#/g ;  # prefixing # by a slash
+
+	$l =~ s/\[/\{/g;  # replacing [ by }
+	$l =~ s/\]/\}/g;  # replacing ] by }
+	$l =~ s/\{\s+/\{/g;  # removing spaces after {
+	$l =~ s/\s+\}/\}/g;  # removing spaces before }
+
+	$l =~ s/-tags \{(\S+)\}/-tags $1/g;  # -tags {toto}  ==>> -tags toto
+	$l =~ s/\'/\"/g;  # replacing all single quotes by double quotes
+
+	$l = &hack($l);
+    
+	$l =~ s/\s+/ /g;  # dangerous: removing multiple occurences of blanks
+
+	$l =~ s/^\s+//;   # removing blanks at the beginning
+	$l =~ s/\s+$//;   # removing trailing blanks
+	$l =~ s/\s*;$//;  # removing trailing ;
+	push @res, $l;
+    }
+    return (@res);
+}
+
+
+# this routine is used to do some special code transformation,
+# due to soem discrepancies between tcl/tk and perl/tk
+# the following code is more or less dependant from the generated
+# code by SVG2zinc.pm
+#
+# We assume is code has already been tcl-ised
+sub hack {
+    my ($l) = @_;
+
+    if ($l =~ /^\$w\.zinc fontCreate/) {
+	# this works because I know how fontCreate is used in SVG2zinc
+	$l =~ s/\$w\.zinc fontCreate/font create/;
+	$l =~ s/-weight medium/-weight normal/;
+    }
+
+    return $l;
+}
+
+1;
+
diff --git a/src/SVG/SVG2zinc/Backend/TclScript.pm.k b/src/SVG/SVG2zinc/Backend/TclScript.pm.k
new file mode 100644
index 0000000..90ecf4b
--- /dev/null
+++ b/src/SVG/SVG2zinc/Backend/TclScript.pm.k
@@ -0,0 +1,275 @@
+package SVG::SVG2zinc::Backend::TclScript;
+#	This program is free software; you can redistribute it and/or
+#	modify it under the terms of the GNU LGPL Libray General Public License
+#	as published by the Free Software Foundation; either version 2
+#	of the License, or (at your option) any later version.
+#
+#	This program 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 Library General Public License for more details.
+#
+#	You should have received a copy of the GNU Library General Public License
+#	along with this program; if not, write to the Free Software
+#	Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA,
+#	or refer to http://www.gnu.org/copyleft/lgpl.html
+#
+##################################################################
+
+#	Backend Class for SVG2zinc
+# 
+#	Copyright 2003
+#	Centre d'Études de la Navigation Aérienne
+#
+#	Author: Christophe Mertz <mertz at intuilab dot com>
+#
+#       A concrete class for code generation for Tcl Scripts
+#
+# $Id: TclScript.pm.k,v 1.1.1.1 2006-10-20 13:34:31 merlin Exp $
+#############################################################################
+
+use strict;
+use Carp;
+
+use SVG::SVG2zinc::Backend;
+use SVG::SVG2zinc::Backend::Tcl;
+use File::Basename;
+
+use vars qw( $VERSION @ISA  );
+@ISA = qw( SVG::SVG2zinc::Backend );
+($VERSION) = sprintf("%d.%02d", q$Revision: 1.1.1.1 $ =~ /(\d+)\.(\d+)/);
+
+sub new {
+    my ($class, %passed_options) = @_;
+    my $self = {};
+    bless $self, $class;
+    $self->{-render} = defined $passed_options{-render} ? delete $passed_options{-render} : 1;
+    $self->_initialize(%passed_options);
+    return $self;
+}
+
+
+sub treatLines {
+    my ($self,@lines) = @_;
+    foreach my $l (@lines) {
+	$self->printLines( &perl2tcl($l) );
+    }
+}
+
+sub fileHeader {
+    my ($self) = @_;
+    my $svgfile = $self->{-in};
+    my $svgfilename = basename($svgfile);
+    $svgfilename =~ s/\./_/g;
+    my ($svg2zincPackage) = caller;
+    my $VERSION = eval ( "\$".$svg2zincPackage."::VERSION" );
+    $self->printLines('#!/bin/sh
+# the next line restarts using wish \
+    exec wish "$0" "$@"
+');
+
+    $self->printLines("
+
+####### This Tcl script file has been generated
+####### from $svgfile
+####### by SVG::SVG2zinc.pm Version: $VERSION
+
+");
+
+    $self->printLines('
+#
+# Locate the zinc top level directory.
+#
+set zincRoot [file join [file dirname [info script]] ..]
+
+#
+# And adjust the paths accordingly.
+#
+lappend auto_path $zincRoot
+set zinc_library $zincRoot
+
+package require Tkzinc 3.2
+
+## here we should import img for reading jpeg, png, gif files
+
+');
+
+    my $render = $self->{-render};
+    $self->printLines(
+<<HEADER
+set w .$svgfilename
+## catch {destroy \$w}
+toplevel \$w
+wm title \$w $svgfilename
+wm iconname \$w $svgfilename
+
+###########################################
+# Zinc
+##########################################
+zinc \$w.zinc -width 600 -height 600 -font 9x15 -borderwidth 0 -backcolor grey90 -render $render
+
+pack \$w.zinc
+
+set topGroup [\$w.zinc add group 1]
+
+
+HEADER
+    );
+}
+
+
+sub fileTail {
+    my ($self) = @_;
+    $self->printLines(
+<<'TAIL'
+### translating ojects for making them all visibles
+
+#set bbox [$w.zinc bbox $topGroup]
+
+$w.zinc translate $topGroup 200 150
+
+
+##### bindings for moving rotating scaling the items
+
+bind $w.zinc <ButtonPress-1>  "press motion %x %y"
+bind $w.zinc <ButtonRelease-1>  release
+bind $w.zinc <ButtonPress-2>  "press zoom %x %y"
+bind $w.zinc <ButtonRelease-2>  release
+bind $w.zinc <ButtonPress-3>  "press mouseRotate %x %y"
+bind $w.zinc <ButtonRelease-3>  release
+
+
+set curX 0
+set curY 0
+set curAngle 0
+
+proc press {action x y} {
+    global w curAngle curX curY
+
+    set curX $x
+    set curY $y
+    set curAngle [expr atan2($y, $x)]
+    bind $w.zinc <Motion> "$action %x %y"
+}
+
+proc motion {x y} {
+    global w topGroup curX curY
+
+    foreach {x1 y1 x2 y2} [$w.zinc transform $topGroup \
+			       [list $x $y $curX $curY]] break
+    $w.zinc translate $topGroup [expr $x1 - $x2] [expr $y1 - $y2]
+    set curX $x
+    set curY $y
+}
+
+proc zoom {x y} {
+    global w curX curY
+
+    if {$x > $curX} {
+	set maxX $x
+    } else {
+	set maxX $curX
+    }
+    if {$y > $curY} {
+	set maxY $y
+    } else {
+	set maxY $curY
+    }
+    if {($maxX == 0) || ($maxY == 0)} {
+	return;
+    }
+    set sx [expr 1.0 + (double($x - $curX) / $maxX)]
+    set sy [expr 1.0 + (double($y - $curY) / $maxY)]
+    $w.zinc scale __svg__1 $sx $sx
+    set curX $x
+    set curY $y
+}
+
+proc mouseRotate {x y} {
+    global w curAngle
+
+    set lAngle [expr atan2($y, $x)]
+    $w.zinc rotate __svg__1 [expr $lAngle - $curAngle]
+    set curAngle  $lAngle
+}
+
+proc release {} {
+    global w
+
+    bind $w.zinc <Motion> {}
+}
+TAIL
+);
+
+    $self->close;
+}
+
+
+1;
+
+
+__END__
+
+=head1 NAME
+
+SVG:SVG2zinc::Backend::TclScript - a backend class for generating Tcl script
+
+=head1 SYNOPSIS
+
+ use SVG:SVG2zinc::Backend::TclScript;
+
+ $backend = SVG:SVG2zinc::Backend::TclScript->new(
+	       -out => filename_or_handle,
+               -in => svgfilename,
+	       -verbose => 0|1,
+	       -render => 0|1|2,
+	       );
+
+ $backend->fileHeader();
+
+ $backend->treatLines("lineOfCode1", "lineOfCode2",...);
+
+ $backend->comment("comment1", "comment2", ...);
+
+ $backend->printLines("comment1", "comment2", ...);
+
+ $backend->fileTail();
+
+=head1 DESCRIPTION
+
+SVG:SVG2zinc::Backend::TclScript is a class for generating Tcl script to display SVG files. The generated script is based on TkZinc.
+
+For more information, you should look at SVG:SVG2zinc::Backend(3pm).
+
+The new method accepts parameters described in the SVG:SVG2zinc::Backend class and the following additionnal parameters:
+
+=over
+
+=item B<-render>
+
+The render value of the TkZinc widget. 0 means no openGL, 1 or 2 for openGL. Defaults to 1.
+
+=back
+
+=head1 SEE ALSO
+
+SVG::SVG2zinc::Backend and SVG::SVG2zinc(3pm)
+
+=head1 BUGS and LIMITATIONS
+
+This is higly experimental. Only few tests... The author is not a Tcl coder!
+
+The Tk::Zinc::SVGExtension perl module provided with SVG::SVG2zinc should be converted in Tcl and imported by (or included in) the generated Tcl script.
+
+=head1 AUTHORS
+
+Christophe Mertz <mertz at intuilab dot com>
+
+=head1 COPYRIGHT
+    
+CENA (C) 2003-2004
+
+This program is free software; you can redistribute it and/or modify it under the term of the LGPL licence.
+
+=cut
+
diff --git a/src/SVG/SVG2zinc/Conversions.pm b/src/SVG/SVG2zinc/Conversions.pm
new file mode 100644
index 0000000..9a8ccb9
--- /dev/null
+++ b/src/SVG/SVG2zinc/Conversions.pm
@@ -0,0 +1,909 @@
+package SVG::SVG2zinc::Conversions;
+#	This program is free software; you can redistribute it and/or
+#	modify it under the terms of the GNU LGPL Libray General Public License
+#	as published by the Free Software Foundation; either version 2
+#	of the License, or (at your option) any later version.
+#
+#	This program 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 Library General Public License for more details.
+#
+#	You should have received a copy of the GNU Library General Public License
+#	along with this program; if not, write to the Free Software
+#	Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA,
+#	or refer to http://www.gnu.org/copyleft/lgpl.html
+#
+##################################################################
+
+use Math::Trig;
+use Math::Bezier::Convert;
+use strict;
+use Carp;
+
+use vars qw( $VERSION @ISA @EXPORT );
+
+($VERSION) = sprintf("%d.%02d", q$Revision: 1.3 $ =~ /(\d+)\.(\d+)/);
+
+@ISA = qw( Exporter );
+
+@EXPORT = qw( InitConv
+	      removeComment convertOpacity
+	      createNamedFont
+	      defineNamedGradient namedGradient namedGradientDef existsGradient
+	      extractGradientTypeAndStops addTransparencyToGradient 
+	      colorConvert
+	      pathPoints points
+	      cleanName
+	      float2int sizesConvert sizeConvert
+	      transform
+	      );
+
+# some variables to be initialized at the beginning
+
+my ($warnProc, $lineNumProc); # two proc
+my %fonts; # a hashtable to identify all used fonts 
+my %gradients;
+
+sub InitConv {
+    ($warnProc, $lineNumProc) = @_;
+    %fonts = ();
+    %gradients = ();
+    return 1;
+}
+
+sub myWarn{
+    &{$warnProc}(@_);
+}
+
+### remove SVG comments in the form  /* */  in $str
+### returns the string without these comments
+sub removeComment {
+    my ($str) = @_;
+#    my $strOrig = $str;
+    return "" unless defined $str;
+
+    while ($str =~ s|(.*)(/\*.*\*/){1}?|$1|) {
+#	print "begin='$str'\n";
+    }
+#    print "'$strOrig' => '$str'\n";
+    $str =~ s/^\s*// ;
+    return $str;
+}
+
+## returns an opacity value between 0 and 1
+## returns 1 if the argument is undefined
+sub convertOpacity {
+    my ($opacity) = @_;
+    $opacity = 1 unless defined $opacity;
+    $opacity = 0 if $opacity<0;
+    $opacity = 1 if $opacity>1;
+    return $opacity;
+}
+
+
+######################################################################################
+#   fontes management
+######################################################################################
+
+# the following hashtable is used to maps SVG font names to X font names
+# BUG: obvioulsy this hashtable should be defined in the system or at
+# least as a configuration file or in the SVG2zinc parser parameters
+
+my %fontsMapping = (
+	'comicsansms' => "comic sans ms",
+	'arialmt' => "arial",
+	'arial black' => "arial-bold",
+	'bleriottextmono-roman' => 'bleriot-radar',
+	'bleriottext-roman' => 'bleriot',
+	'cityd' => 'city d',
+	'cityd-medi' => 'city d',
+);
+
+my $last_key = "verdana";
+
+sub createNamedFont {
+    my ($fullFamily, $size, $weight) = @_;
+    if ($fullFamily eq "")
+    {
+    	$fullFamily = $last_key if $fullFamily eq "";
+    }
+    else
+    {
+    	$last_key = $fullFamily;
+    }
+    my $family = lc($fullFamily);
+
+    $weight = "normal" unless $weight;
+    if ( $size =~ /(.*)pt/ ) 
+    {
+		$size = -$1;
+    } 
+    elsif ( $size =~ /(.*)px/ ) 
+    {
+		$size = -$1;
+    }
+    elsif ( $size =~ /(\d*(.\d*)?)\s*$/ ) 
+    {
+		$size = -$1;
+    }
+#     $size = &float2int($size); # I round the font size, at least until we have vectorial font in Tk::Zinc
+
+	$family = $fontsMapping{$family} if defined $fontsMapping{$family};    
+    if ( $family =~ /(\w*)-bold/ ) 
+    {
+		$family = $1;
+		$weight = "bold";
+    }
+    else
+    {
+		$weight = "medium";
+    }
+
+    my $fontKey = join "_", ($family, $size, $weight);
+    if (!defined $fonts{$fontKey}) 
+    {
+		$fonts{$fontKey} = $fontKey;
+		return ($fontKey, "->fontCreate('$fontKey', -family => \"$family\", -size => $size, -weight => \"$weight\") if ! \$fonts {\"$fontKey\"};");
+    } 
+    else 
+    {
+		return ($fontKey,"");
+    }
+    
+} # end of createNamedFont
+
+######################################################################################
+#   gradients management
+######################################################################################
+# my %gradients;
+
+## Check if the new gradient does not already exists (with another name)
+## In this case, the hash is extended with an "auto-reference"
+##   $gradients{newName} = "oldName"
+## and the function returns 0
+## Otherwise, add an entry in the hastable
+##   $gradients{newName} = "newDefinition"
+## and returns 1
+sub defineNamedGradient {
+    my ($newGname, $newGradDef) = @_;
+    my $prevEqGrad;
+    $newGradDef =~ s/^\s*(.*\S)\s*$/$1/ ; # removing trailing/leading blank
+    $newGradDef =~ s/\s*\|\s*/ \| /g ;    # inserting blanks around the |
+    $newGradDef =~ s/\s\s+/ /g;  # removing multiple occurence of blanks
+#    print "CLEANED grad='$newGradDef'\n";
+    foreach my $gname (keys %gradients) {
+	if ($gradients{$gname} eq $newGradDef) {
+	    ## such a gradient already exist with another name
+	    $gradients{$newGname} = $gname;
+#	    print "GRADIENT: $newGname == $gname\n";
+
+#	    $res .= "\n###### $newGname => $gname"; ### 
+
+	    return 0;
+	}
+    }
+    ## there is no identical gradient with another name
+    ## we add the definition in the hashtable
+    $gradients{$newGname} = $newGradDef;
+    return $newGradDef;
+}
+
+## returns the name of a gradient, by following if necessary
+## "auto-references" in the hashtable
+sub namedGradient {
+    my ($gname) = @_;
+    my $def = $gradients{$gname};
+    return $gname unless defined $def; 
+    ## to avoid looping if the hashtable is buggy:
+    return $gname if !defined $gradients{$def} or $def eq $gradients{$def}; 
+    return &namedGradient($gradients{$gname});
+}
+
+## returns the definition associated to a named gradient, following if necessary
+## "auto-references" in the hashtable
+sub namedGradientDef {
+    my ($gname) = @_;
+    my $def = $gradients{$gname};
+    return "" unless defined $def; 
+    ## to avoid looping if the hashtable is buggy:
+    return $def if !defined $gradients{$def} or $def eq $gradients{$def}; 
+    return $gradients{&namedGradient($gradients{$gname})};
+}
+
+# returns 1 if the named has an associated gradient
+sub existsGradient {
+    my ($gname) = @_;
+    if (defined $gradients{$gname}) {return 1} else {return 0}; 
+}
+
+## this function returns both the radial type with its parameters AND
+## a list of stops characteristics as defined in TkZinc
+## usage: ($radialType, @stops) = &extractGradientTypeAndStops(<namedGradient>);
+## this func assumes that <namedGradient> DOES exist
+sub extractGradientTypeAndStops {
+    my ($namedGradient) = @_;
+    my $gradDef = &namedGradientDef($namedGradient);
+    my @defElements = split (/\s*\|\s*/ , $gradDef);
+    my $gradientType;
+    $gradientType = shift @defElements;
+    return ($gradientType, @defElements); 
+}
+
+## combines the opacity to every parts of a named gradient
+## if some parts of the gradients are themselves partly transparent, they are combined
+## if $opacity is 1, returns directly $gname
+## else returns a new definition of a gradient
+sub addTransparencyToGradient {
+    my ($gname,$opacity) = @_;
+    return $gname if $opacity == 100;
+    &myWarn ("ATTG: ERROR $gname\n"), return $gname if !&namedGradientDef($gname); ## this cas is certainly an error in the SVG source file!
+    my ($gradientType, @stops) = &extractGradientTypeAndStops($gname);
+
+    my @newStops;
+    foreach my $stop (@stops) {
+	my $newStop="";
+	if ($stop =~ /^([^\s;]+)\s*;\s*(\d+)\s*(\d*)\s*$/   #   red;45 50   or red;45
+	    ) {
+	    my ($color,$trans,$pos) = ($1,$2,$3);
+#	    print "$stop => '$color','$trans','$pos'\n";
+	    my $newtransp = &float2int($trans*$opacity/100);
+	    if ($pos) {
+		$newStop="$color;$newtransp $pos";
+	    } else {
+		$newStop="$color;$newtransp";
+	    }
+	} elsif ($stop =~ /^(\S+)\s+(\d+)$/) {             # red 50
+	    my ($color,$pos) = ($1,$2);
+#	    print "$stop => '$color','$pos'\n";
+	    my $newtransp = &float2int($opacity);
+	    $newStop="$color;$newtransp $pos";
+	} elsif ($stop =~ /^(\S+)$/) {
+	    my ($color) = ($1);
+#	        print "$stop => '$color'\n";
+	    my $newtransp = &float2int($opacity);
+	    $newStop="$color;$newtransp";
+	} else {
+	    &myWarn ("In addTransparencyToGradient: bad gradient Elements: '$stop'\n");
+	}
+	push @newStops, $newStop;
+    }
+    return ( $gradientType . " | " . join (" | ", @newStops));
+} # end of addTransparencyToGradient
+
+
+######################################################################################
+# color conversion
+######################################################################################
+# a hash table to define non-X SVG colors
+# THX to Lemort for bug report and correction!
+my %color2color = ('lime'    => 'green',
+		   'Lime'    => 'green',
+		   'crimson' => '#DC143C',
+		   'Crimson' => '#DC143C',
+		   'aqua'    => '#00ffff',
+		   'Aqua'    => '#00ffff',
+		   'fuschia' => '#ff00ff',
+		   'Fuschia' => '#ff00ff',
+		   'fuchsia' => '#ff00ff',
+		   'Fuchsia' => '#ff00ff',
+		   'indigo'  => '#4b0082',
+		   'Indigo'  => '#4b0082',
+		   'olive'   => '#808000',
+		   'Olive'   => '#808000',
+		   'silver'  => '#c0c0c0',
+		   'Silver'  => '#c0c0c0',
+		   'teal'    => '#008080',
+		   'Teal'    => '#008080',
+		   'green'   => '#008000',
+		   'Green'   => '#008000',
+		   'grey'    => '#808080',
+		   'Grey'    => '#808080',
+		   'gray'    => '#808080',
+		   'Gray'    => '#808080',
+		   'maroon'  => '#800000',
+		   'Maroon'  => '#800000',
+		   'purple'  => '#800080',
+		   'Purple'  => '#800080',
+		   );
+
+#### BUG: this is certainly only a partial implementation!!
+sub colorConvert {
+    my ($color) = @_;
+  
+    if ($color =~ /^\s*none/m) 
+    {
+		return ('none', 0);
+    } 
+    elsif ($color =~ /rgb\(\s*(.+)\s*\)/ ) 
+    {
+		## color like "rgb(...)"
+		my $rgbs = $1;
+		if ($rgbs =~ /([\d.]*)%\s*,\s*([\d.]*)%\s*,\s*([\d.]*)%/ ) 
+		{
+  	    	## color like "rgb(1.2% , 45%,67.%)"
+		    my ($r,$g,$b) = ($1,$2,$3);
+		    $color = sprintf ("#%02x%02x%02x",
+			      sprintf ("%.0f",2.55*$r),
+			      sprintf ("%.0f",2.55*$g),
+			      sprintf ("%.0f",2.55*$b));
+	    	return ($color, 0);
+		} 
+		elsif ($rgbs =~ /(\d*)\s*,\s*(\d*)\s*,\s*(\d*)/ ) 
+		{
+	    	## color like "rgb(255, 45,67)"
+	    	my ($r,$g,$b) = ($1,$2,$3);
+	    	$color = sprintf "#%02x%02x%02x", $r,$g,$b;
+	    	return ($color, 0);
+	    } 
+	    else 
+	    {
+	    	&myWarn ("Unknown rgb color coding: $color\n");
+		}
+    } 
+    elsif ($color =~ /^url\(\#(.+)\)/ ) 
+    {
+		## color like "url(#monGradient)"
+# 		$color = $1;
+#		my $res = &namedGradient($color);
+		return ($1, 1); #&namedGradient($1);
+    } 
+    elsif ( $color =~ /\#([0-9a-fA-F]{3}?)$/ ) 
+    {
+		## color like #fc1 => #ffcc11
+		$color =~ s/([0-9a-fA-F])/$1$1/g ;
+        # on doubling the digiys, because Tk does not do it properly
+		return ($color, 0);
+    } 
+    elsif ( $color =~ /\#([0-9a-fA-F]{6}?)$/ ) 
+    {
+	    return ($color, 0);
+    }
+    else 
+    {
+	## named colors!
+	## except those in the %color2color, all other should be defined in the
+	## standard rgb.txt file
+# 	my $converted = $color2color{lc($color)}; # THX to Lemort for bug report!
+# 	if (defined $converted) {
+# 	    return $converted;
+# 	} else {
+	    return ($color, 0);
+# 	}
+    }
+} # end of colorConvert
+
+######################################################################################
+# path points commands conversion
+######################################################################################
+
+
+# &pathPoints (\%attrs)
+# returns a boolean and a list of table references
+# - the boolean is true is the path has more than one contour or if it must be closed
+# - every table referecne pints to a table of strings, each string describing coordinates
+# possible BUG: in Tk::Zinc when a curve has more than one contour, they are all closed
+#  how is it in SVG?
+sub pathPoints {
+    my ($ref_attrs) = @_;
+    my $str = $ref_attrs->{d};
+#    print "#### In PathPoints : $str\n";
+    my ($x,$y) = (0,0); # current values
+    my $closed = 1;
+    my $atLeastOneZ=0; # true if at least one z/Z command. The curve must then be closed
+    my @fullRes;
+    my @res ;
+    my ($firstX, $firstY); # for memorizing the first point for a 'm' command after a 'z'!
+    my ($prevContrlx,$prevContrly); # useful for the s/S commande
+
+    # I use now a repetitive search on the same string, without allocating
+    # a $last string for the string end; with very long list of points, such
+    # as iceland.svg, we can gain 30% in this function and about 3s over 30s
+    while ( $str =~ m/\s*([aAmMzZvVhHlLcCsSqQtT])\s*([^aAmMzZvVhHlLcCsSqQtT]*)\s*/g ) {
+	my ($command, $args)=($1,$2);
+	&myWarn ("!!!! Ill-formed path command: '", substr($str,pos($str), 40), "...'\n") unless defined $command ;
+#	print "Command=$command args=$args x=$x y=$y\n";
+	if ($command eq "M") {   ## moveto absolute
+	    if (!$closed) {
+		## creating a new contour
+		push @fullRes, [ @res ];
+		$atLeastOneZ = 1;
+		@res = ();
+	    }
+	    my @points = &splitPoints($args);
+	    ($prevContrlx,$prevContrly) = (undef,undef);
+	    $firstX = $points[0];
+	    $firstY = $points[1];
+	    while (@points) {
+		$x = shift @points;
+		$y = shift @points;
+		push @res , "[$x, $y]";
+	    }
+	    next;
+	} elsif ($command eq "m") {  ## moveto relative
+	    if (!$closed) {
+		## creating a new contour
+		push @fullRes, [ @res ];
+		$atLeastOneZ = 1;
+		@res = ();
+	    }
+	    my @dxy = &splitPoints($args);
+	    $firstX = $x+$dxy[0];
+	    $firstY = $y+$dxy[1];
+# 	    print "m command: $args  => @dxy ,$x,$y\n";
+	    while (@dxy) {
+		## trying to minimize the number of operation
+		## to speed a bit this loop
+		$x += shift @dxy;
+		$y += shift @dxy;
+		push @res, "[$x, $y]";
+	    }
+	    next;
+	} elsif ($command eq 'z' or $command eq 'Z') {
+	    push @fullRes, [ @res ];
+	    $closed = 1;
+	    $atLeastOneZ = 1;
+	    @res = ();
+	    $x=$firstX;
+	    $y=$firstY;
+	    next;
+	}
+	# as a command will/should follow, the curve is no more closed
+	$closed = 0;
+	if ($command eq "V") {  ## vertival lineto absolute
+	    ($y) = $args =~ /(\S+)/m ;  ## XXXX what about multiple y !?
+	    push @res , "[$x, $y]";
+	} elsif ($command eq "v") {  ## vertical lineto relative
+	    my ($dy) = $args =~ /(\S+)/m ;  ## XXXX what about multiple dy !?
+	    $y += $dy;
+	    push @res , "[$x, $y]";
+	} elsif ($command eq "H") {  ## horizontal lineto absolute
+	    ($x) = $args =~ /(\S+)/m ;  ## XXXX what about multiple x !?
+	    push @res , "[$x, $y]";
+	} elsif ($command eq "h") {  ## horizontal lineto relative
+	    my ($dx) = $args =~ /(\S+)/m ;  ## XXXX what about multiple dx !?
+	    $x += $dx;
+	    push @res , "[$x, $y]";
+	} elsif ($command eq "L") {  ## lineto absolute
+	    my @points = &splitPoints($args);
+	    while (@points) {
+		$x = shift @points;
+		$y = shift @points;
+		push @res , "[$x, $y]";
+	    }
+	} elsif ($command eq "l") {  ## lineto relative
+	    ### thioscommand can have more than one point as arguments
+	    my @points = &splitPoints($args);
+	    # for (my $i = 0; $i < $#points; $i+=2)
+	    # is not quicker than the following while
+  	    while (@points) {
+		## trying to minimize the number of operation
+		## to speed a bit this loop
+  		$x += shift @points;
+  		$y += shift @points;
+  		push @res , "[$x, $y]";
+  	    }
+	} elsif ($command eq "C" or $command eq "c") {  ## cubic bezier
+	    &myWarn ("$command command in a path must not be the first one") ,last
+		if (scalar @res < 1);
+	    my @points = &splitPoints($args);
+	    while (@points) {
+		&myWarn ("$command command must have 6 coordinates x N times") ,last
+		    if (scalar @points < 6);
+		my $x1 = shift @points;
+		my $y1 = shift @points;
+		$prevContrlx = shift @points;
+		$prevContrly = shift @points;
+		my $xf = shift @points;
+		my $yf = shift @points;
+		if ($command eq "c") { $x1+=$x; $y1+=$y; $prevContrlx+=$x; $prevContrly+=$y; $xf+=$x; $yf+=$y}
+		push @res, ( "[$x1, $y1, 'c'], [$prevContrlx, $prevContrly, 'c'], [$xf, $yf]");
+		$x=$xf;
+		$y=$yf;
+	    }
+	} elsif ($command eq "S" or $command eq "s") {  ## cubic bezier with opposite last control point
+	    &myWarn ("$command command in a path must not be the first one") ,last
+		if (scalar @res < 1);
+#	    print "$command command : $args\n";
+	    my @points = &splitPoints($args);
+	    if ($command eq "s") {
+		for (my $i=0; $i <= $#points; $i += 2) {
+		    $points[$i] += $x;
+		}
+		for (my $i=1; $i <= $#points; $i += 2) {
+		    $points[$i] += $y;
+		}
+	    }
+	    while (@points) {
+		&myWarn ("$command command must have 4 coordinates x N times; skipping @points") ,last
+		    if (scalar @points < 4);
+		my $x1 = (defined $prevContrlx) ? $prevContrlx : $x;
+		$x1 = 2*$x-$x1;
+		my $y1 = (defined $prevContrly) ? $prevContrly : $y;
+		$y1 = 2*$y-$y1;
+		$prevContrlx = shift @points;
+		$prevContrly = shift @points;
+		$x = shift @points;
+		$y = shift @points;
+		push @res, ( "[$x1, $y1, 'c'], [$prevContrlx, $prevContrly, 'c'], [$x, $y]");
+	    }
+
+
+	} elsif ($command eq "Q" or $command eq "q") {  ## quadratic bezier
+	    &myWarn ("$command command in a path must not be the first one") ,last
+		if (scalar @res < 1);
+	    my @points = &splitPoints($args);
+	    if ($command eq "q") {
+		for (my $i=0; $i <= $#points; $i += 2) {
+		    $points[$i] += $x;
+		}
+		for (my $i=1; $i <= $#points; $i += 2) {
+		    $points[$i] += $y;
+		}
+	    }
+	    while (@points) {
+		&myWarn ("$command command must have 4 coordinates x N times") ,last
+		    if (scalar @points < 4);
+		$prevContrlx = shift @points;
+		$prevContrly = shift @points;
+		
+		my $last_x = $x;
+		my $last_y = $y;
+
+		$x = shift @points;
+		$y = shift @points;
+
+		# the following code has been provided by Lemort@intuilab.com
+		my @coordsToConvert = ($last_x,$last_y, $prevContrlx, $prevContrly,$x,$y);
+		my @convertCoords = Math::Bezier::Convert::quadratic_to_cubic(@coordsToConvert);
+		# removing the first point, already present
+		splice(@convertCoords, 0, 2);
+		
+		while (@convertCoords) {
+		    my ($ctrl1_x, $ctrl1_y) = splice(@convertCoords, 0, 2);
+		    my ($ctrl2_x, $ctrl2_y) = splice(@convertCoords, 0, 2);
+		    my ($pt_x, $pt_y) = splice(@convertCoords, 0, 2);
+
+		    push @res, ("[$ctrl1_x, $ctrl1_y, 'c'], [$ctrl2_x, $ctrl2_y, 'c'], [$pt_x, $pt_y]");
+		}
+
+	    }
+
+	} elsif ($command eq "T" or $command eq "t") {  ## quadratic bezier with opposite last control point?!
+	    &myWarn ("$command command in a path must not be the first one") ,last
+		if (scalar @res < 1);
+	    my @points = &splitPoints($args);
+
+	    if ($command eq "t") {
+		for (my $i=0; $i <= $#points; $i += 2) {
+		    $points[$i] += $x;
+		}
+		for (my $i=1; $i <= $#points; $i += 2) {
+		    $points[$i] += $y;
+		}
+	    }
+	    while (@points) {
+		&myWarn ("$command command must have 2 coordinates x N times") ,last
+		    if (scalar @points < 2);
+		my $x1 = (defined $prevContrlx) ? $prevContrlx : $x;
+		$prevContrlx = 2*$x-$x1;
+		my $y1 = (defined $prevContrly) ? $prevContrly : $y;
+		$prevContrly = 2*$y-$y1;
+		
+		my $last_x = $x;
+		my $last_y = $y;
+
+		$x = shift @points;
+		$y = shift @points;
+
+		# the following code has been provided by Lemort@intuilab.com
+		my @coordsToConvert = ($last_x,$last_y, $prevContrlx, $prevContrly,$x,$y);
+		my @convertCoords = Math::Bezier::Convert::quadratic_to_cubic(@coordsToConvert);
+		# removing the first point, already present
+		splice(@convertCoords, 0, 2);
+		
+		while (@convertCoords) {
+		    my ($ctrl1_x, $ctrl1_y) = splice(@convertCoords, 0, 2);
+		    my ($ctrl2_x, $ctrl2_y) = splice(@convertCoords, 0, 2);
+		    my ($pt_x, $pt_y) = splice(@convertCoords, 0, 2);
+
+		    push @res, ("[$ctrl1_x, $ctrl1_y, 'c'], [$ctrl2_x, $ctrl2_y, 'c'], [$pt_x, $pt_y]");
+		}
+
+	    }
+	} elsif ($command eq 'a' or $command eq 'A') {
+	    my @points = &splitPoints($args);
+	    while (@points) {
+		&myWarn ("bad $command command parameters: @points\n") if (scalar @points < 7);
+#	    print "($x,$y) $command command: @points\n";
+		if ($command eq 'a') {
+		    $points[5] += $x;
+		    $points[6] += $y;
+		}
+#	    print "($x,$y) $command command: @points\n";
+		my @coords = &arcPathCommand ( $x,$y, @points[0..6] );
+		push @res, @coords;
+		$x = $points[5];
+		$y = $points[6];
+		last if (scalar @points == 7);
+		@points = @points[7..$#points]; ### XXX ? tester!
+	    }
+	} else {
+	    &myWarn ("!!! bad path command: $command\n");
+	}
+    }
+    if (@res) {
+	return ( $atLeastOneZ, [@res], @fullRes);
+    } else { return ( $atLeastOneZ, @fullRes) }
+} # end of pathPoints
+
+
+
+
+# this function can be called many many times; so it has been "optimized"
+# even if a bit less readable
+sub splitPoints {
+    $_ = shift;
+    ### adding a space before every dash (-) when the dash preceeds by a digit
+    s/(\d)-/$1 -/g;
+    ### adding a space before ? dot (.) when more than one real are not separated;
+    ### e.g.:  '2.3.45.6.' becomes '2.3 .45 .5'
+    while ( scalar s/\.(\d+)\.(\d+)/\.$1 \.$2/) {
+    }
+    return  split ( /[\s,]+/ );
+}
+
+
+
+sub arcPathCommand {
+    my ($x1,$y1, $rx,$ry, $x_rot, $large_arc_flag,$sweep_flag, $x2,$y2) = @_;
+    return ($x2,$y2) if ($rx == 0 and $ry == 0);
+    $rx = -$rx if $rx < 0;
+    $ry = -$ry if $ry < 0;
+
+    # computing the center
+    my $phi = deg2rad($x_rot);
+
+    # compute x1' and y1' (formula F.6.5.1)
+    my $deltaX = ($x1-$x2)/2;
+    my $deltaY = ($y1-$y2)/2;
+    my $xp1 =  cos($phi)*$deltaX + sin($phi)*$deltaY;
+    my $yp1 = -sin($phi)*$deltaX + cos($phi)*$deltaY;
+#    print "xp1,yp1= $xp1 , $yp1\n";
+
+    # the radius_check has been suggested by lemort@intuilab.com
+    # checking that radius are correct
+    my $radius_check = ($xp1/$rx)**2 + ($yp1/$ry)**2;
+    
+    if ($radius_check > 1) {
+        $rx *= sqrt($radius_check);
+        $ry *= sqrt($radius_check);
+    }
+
+    # compute the sign:  (formula F.6.5.2)
+    my $sign = 1;
+    $sign = -1 if $large_arc_flag eq $sweep_flag;
+    # compute the big square root  (formula F.6.5.2)
+#    print "denominator: ", ( ($rx*$ry)**2 - ($rx*$yp1)**2 - ($ry*$xp1)**2 ),"\n";
+    my $bigsqroot = (
+		     abs( ($rx*$ry)**2 - ($rx*$yp1)**2 - ($ry*$xp1)**2 ) ### ABS ?!?!
+		     /
+		     ( ($rx*$yp1)**2 + ($ry*$xp1)**2 )
+		     );
+    # computing c'x and c'y  (formula F.6.5.2) 
+    $bigsqroot = $sign * sqrt ($bigsqroot);
+    my $cpx = $bigsqroot * ($rx*$yp1/$ry);
+    my $cpy = $bigsqroot * (- $ry*$xp1/$rx);
+
+    # compute cx and cy  (formula F.6.5.3)
+    my $middleX = ($x1+$x2)/2;
+    my $middleY = ($y1+$y2)/2;
+    my $cx = cos($phi)*$cpx - sin($phi)*$cpy + $middleX;
+    my $cy = sin($phi)*$cpx + cos($phi)*$cpy + $middleY;
+
+    # computing theta1   (formula F.6.5.5)
+    my $XX = ($xp1-$cpx)/$rx;
+    my $YY = ($yp1-$cpy)/$ry;
+    my $theta1 = rad2deg (&vectorProduct ( 1,0, $XX,$YY));
+    # computing dTheta (formula F.6.5.6)
+    my $dTheta = rad2deg (&vectorProduct ( $XX,$YY, (-$xp1-$cpx)/$rx,(-$yp1-$cpy)/$ry ));
+
+        if (!$sweep_flag and $dTheta>0) {
+	$dTheta-=360;
+    }
+    if ($sweep_flag and $dTheta<0) {
+	$dTheta+=360;
+    }
+    return  join (",", &computeArcPoints($cx,$cy,$rx,$ry,
+				       $phi,deg2rad($theta1),deg2rad($dTheta))), "\n";
+}
+
+sub computeArcPoints {
+	my ($cx,$cy,$rx,$ry,$phi,$theta1,$dTheta) = @_;
+	my $Nrad = 3.14/18;
+	my $N = &float2int(abs($dTheta/$Nrad));
+	my $cosPhi = cos($phi);
+	my $sinPhi = sin($phi);
+	my $dd = $dTheta/$N;
+	my @res;
+	for (my $i=0; $i<=$N; $i++) 
+	{
+		my $a = $theta1 + $dd*$i;
+		my $xp = $rx*cos($a);
+		my $yp = $ry*sin($a);
+		my $x1 = $cosPhi*$xp - $sinPhi*$yp + $cx;
+		my $y1 = $sinPhi*$xp + $cosPhi*$yp + $cy;
+		push @res, "[$x1, $y1]";
+	}
+	return @res;
+}
+
+## vectorial product
+sub vectorProduct {
+    my ($x1,$y1, $x2,$y2) = @_;
+    my $sign = 1;
+    $sign = -1 if ($x1*$y2 - $y1*$x2) < 0;
+
+    return $sign * acos ( ($x1*$x2 + $y1*$y2)
+			  /
+			  sqrt ( ($x1**2 + $y1**2) * ($x2**2 + $y2**2) )
+			  );
+}
+
+######################################################################################
+# points conversions for polygone / polyline
+######################################################################################
+
+# &points (\%attrs)
+# converts the string, value of an attribute points
+# to a string of coordinate list for Tk::Zinc
+sub points {
+    my ($ref_attrs) = @_;
+    my $str = $ref_attrs->{points};
+    # suppressing leading and trailing blanks:
+    ($str) = $str =~ /^\s*   # leading blanks
+                      (.*\S) # 
+		      \s*$   # trailing blanks
+		     /x;
+
+    $str =~ s/([^,])[\s]+([^,])/$1,$2/g ;  # replacing blanks separators by a comma
+    return $str;
+}
+
+######################################################################################
+# cleaning an id to make it usable as a TkZinc Tag
+######################################################################################
+
+## the following function cleans an id, ie modifies it so that it
+## follows the TkZinc tag conventions.
+## BUG: the cleanning is far from being complete
+sub cleanName {
+    my $id = shift;
+     # to avoid numeric ids
+    if ($id =~ /^\d+$/) {
+#	&myWarn ("id: $id start with digits\n");
+	$id = "id_".$id;
+    }
+    # to avoid any dots in a tag
+    if ($id =~ /\./) {
+#	&myWarn ("id: $id contains dots\n");
+	$id =~ s/\./_/g ;
+    }
+    return $id;
+}
+
+################################################################################
+# size conversions
+################################################################################
+
+## get a list of "size" attributes as listed in @attrs (e.g.: x y width height...)
+## - convert all in pixel
+## - return 0 for attributes listed in @attrs and not available in %{$ref_attrs}
+sub sizesConvert {
+    my ($ref_attrs,@attrs) = @_;
+    my %attrs = %{$ref_attrs};
+    my @res;
+    foreach my $attr (@attrs) 
+    {
+		my $value;
+		if (!defined ($value = $attrs{$attr}) ) 
+		{
+			if ($attr eq 'x2')
+			{
+				push (@res, 1);
+			}
+			else
+			{
+		    		push (@res, 0);
+			}
+		} 
+		else 
+		{
+		    push @res,&sizeConvert ($value);
+		}
+    }
+    return @res;
+} # end of sizesConvert
+
+# currently, to simplify this code, I suppose the screen is 100dpi!
+# at least the generated code is currently independant from the host
+# where is is supposed to run
+# maybe this should be enhanced
+sub sizeConvert {
+    my ($value) = @_;
+    if ($value =~ /(.*)cm/) {
+	return $1 * 40;   ## approximative pixel / cm
+    } elsif ($value =~ /(.*)mm/) {
+	return $1 * 4;   ## approximative pixel / mm
+    } elsif ($value =~ /(.*)px/) {
+	return $1;   ## exact! pixel / pixel
+    } elsif ($value =~ /(.*)in/) {
+	return &float2int($1 * 100);   ## approximative pixel / inch
+    } elsif ($value =~ /(.*)pt/) {
+	return &float2int($1 * 100 / 72);   ## approximative pixel / pt  (a pt = 1in/72)
+    } elsif ($value =~ /(.*)pc/) {
+	return &float2int($1 * 100 / 6);   ##   (a pica = 1in/6)
+    } elsif ($value =~ /(.*)%/) {
+	return $1/100;   ## useful for coordinates using % 
+	                 ## in lienar gradient (x1,x2,y2,y2)
+    } elsif ($value =~ /(.*)em/) { # not yet implemented
+	&myWarn ("em unit not yet implemented in sizes");
+	return $value;
+    } elsif ($value =~ /(.*)ex/) { # not yet implemented
+	&myWarn ("ex unit not yet implemented in sizes");
+	return $value;
+    } else {
+	return $value;
+    }
+} # end of sizeConvert
+
+
+sub float2int {
+    return sprintf ("%.0f",$_[0]);
+}
+
+
+# process a string describing transformations
+# returns a list of string describing transformations
+# to be applied to Tk::Zinc item Id
+sub transform {
+    my ($id, $str) = @_;
+    return () if !defined $str;
+    &myWarn ("!!! Need an Id for applying a transformation\n"), return () if !defined $id;
+    my @fullTrans;
+    while ($str  =~ m/\s*(\w+)\s*\(([^\)]*)\)\s*/g) {
+	my ($trans, $params) = ($1,$2);
+	my @params = split (/[\s,]+/, $params);
+	if ($trans eq 'translate') {
+	    $params[1] = 0 if scalar @params == 1; ## the 2nd paramter defaults to 0
+	    my $translation = "-> translate ($id," . join (",",@params) . ");"  ;
+	    push @fullTrans, $translation;
+	} elsif ($trans eq 'rotate') {
+	    $params[0] = deg2rad($params[0]);
+	    my $rotation = "-> rotate ($id," . join (",",@params) . ");";
+	    push @fullTrans, $rotation;
+	} elsif ($trans eq 'scale') {
+	    $params[1] = $params[0] if scalar @params == 1; ## the 2nd scale parameter defaults to the 1st
+	    my $scale = "-> scale ($id," . join (",",@params) . ");";
+	    push @fullTrans,$scale;
+	} elsif ($trans eq 'matrix') {
+	    my $matrixParams = join ',',@params;
+	    my $matrix = "-> tset ($id, $matrixParams);";
+	    push @fullTrans, $matrix;
+	} elsif ($trans eq 'skewX'){
+	    my $skewX = "-> skew ($id, " . deg2rad($params[0]) . ",0);";
+#	    print "skewX=$skewX\n";
+	    push @fullTrans, $skewX;
+	} elsif ($trans eq 'skewY'){
+	    my $skewY = "-> skew ($id, 0," . deg2rad($params[0]) . ");";
+#	    print "skewY=$skewY\n";
+	    push @fullTrans, $skewY;
+	} else {
+	    &myWarn ("!!! Unknown transformation '$trans'\n");
+	}
+#	$str = $rest;
+    }
+    return reverse @fullTrans;
+} # end of transform
+
+1;