From c5866f304210618979d03c561b1e3f6f83200bce Mon Sep 17 00:00:00 2001
From: ribet
Date: Wed, 21 Mar 2007 10:19:39 +0000
Subject: Import initial

---
 src/Tk/Zinc/SVGExtension.pm | 140 ++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 140 insertions(+)
 create mode 100644 src/Tk/Zinc/SVGExtension.pm

(limited to 'src/Tk')

diff --git a/src/Tk/Zinc/SVGExtension.pm b/src/Tk/Zinc/SVGExtension.pm
new file mode 100644
index 0000000..fc1e17c
--- /dev/null
+++ b/src/Tk/Zinc/SVGExtension.pm
@@ -0,0 +1,140 @@
+package SVGExtension;
+#	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
+#
+##################################################################
+
+#       Zinc methods, usefull at display time of Zinc code generated for SVG file
+# 
+#	Copyright 2003
+#	Centre d'Études de la Navigation Aérienne
+#
+#	Author: Christophe Mertz <mertz@cena.fr>
+#
+# $Id: SVGExtension.pm,v 1.1.1.1 2006-10-20 13:34:25 merlin Exp $
+#############################################################################
+
+use strict;
+use Carp;
+
+
+use vars qw( $VERSION );
+
+($VERSION) = sprintf("%d.%02d", q$Revision: 1.1.1.1 $ =~ /(\d+)\.(\d+)/);
+
+# To implement SVG viewport.
+# This method must be called when dispalying zinc objects, because the bbox of
+# Zinc objects must be known.
+## BUG: Zinc method bbox return an oversized bbox (Zinc 3.2.6h).
+## So this method cannot currently be fully exact.
+sub Tk::Zinc::adaptViewport {
+    my ($zinc, $name, $width,$height, $viewbox, $aspectRatio) = @_;
+    my($x0,$y0,$x1,$y1)=$zinc->bbox($name); 
+    ($x0,$y0,$x1,$y1)=($x0+2,$y0+2,$x1-2,$y1-2); # 2 is a delta induced by zinc!
+    my $dx=$x1-$x0;
+    my $dy=$y1-$y0;
+#    print "In adaptViewport: $name w=$width h=$height dx=$dx dy=$dy x0=$x0,y0=$y0,x1=$x1,y1=$y1\n";
+    if (!$aspectRatio) {
+	## simple scale should be enough!
+	my ($scaleX,$scaleY) = ($width/$dx, $height/$dy);
+	$zinc->scale($name, $scaleX,$scaleY);
+    } else {	
+	my ($minx,$miny,$portWidth,$portHeight) = split /[\s,]+/ , $viewbox;
+	my ($xalign,$yalign,$meet) = $aspectRatio =~ /x(.*)Y(.*)\s+(.*)/ ;
+	print "In adaptViewport: $name viewbox=$viewbox xalign=$xalign yalign=$yalign meet=$meet\n";
+	if ($meet eq 'meet') {
+	    ## il faut réduire la taille
+	    my $scale = 1;
+	    my ($scaleX,$scaleY) = ($width/$dx, $height/$dy);
+	    if ($scaleX < $scaleY) {
+		if ($scaleX < 1) {
+		    $scale = $scaleX;
+		}
+	    } elsif ($scaleY < 1) {
+		$scale = $scaleY;
+	    }
+	    print "In adaptViewport: meet scale=$scale\n";
+	    $zinc->scale($name, $scale,$scale);
+	    
+	    my ($shiftX,$shiftY)=(0,0);
+	    if ($xalign eq 'Min') {
+	    } elsif ($xalign eq 'Max') {
+		$shiftX = $width - $dx*$scale;
+	    } elsif ($xalign eq 'Mid') {
+		$shiftX = ($width - $dx*$scale)/2;
+	    } else {
+		print "ERROR bad aspectratio value (for X): $aspectRatio\n";
+	    }
+	    
+	    if ($yalign eq 'Min') {
+	    } elsif ($yalign eq 'Max') {
+		$shiftY = $height - $dy*$scale;
+	    } elsif ($yalign eq 'Mid') {
+		$shiftY = ($height - $dy*$scale)/2;
+	    } else {
+		print "ERROR: bad aspectratio value (for Y): $aspectRatio \n";
+	    }
+	    $zinc->translate($name, $shiftX,$shiftY);
+	} elsif ($meet eq 'slice') {
+	    ## il faut clipper
+	    my $scale = 1;
+	    if ($dx < $width)  {
+		$scale = $width/$dx;
+	    }
+	    if ($dy < $height) {
+		my $scaleY = $height/$dy;
+		if ($scaleY > $scale) {$scale=$scaleY};
+	    }
+	    print "In adaptViewport: slice scale=$scale\n";
+	    $zinc->scale($name, $scale,$scale);
+		my ($shiftX,$shiftY)=(0,0);
+	    
+	    if ($xalign eq 'Min') {
+	    } elsif ($xalign eq 'Max') {
+		$shiftX = $width - $dx*$scale;
+	    } elsif ($xalign eq 'Mid') {
+		$shiftX = ($width - $dx*$scale)/2;
+	    } else {
+		print "ERROR bad aspectratio value (for X): $aspectRatio\n";
+	    }
+	    
+	    if ($yalign eq 'Min') {
+	    } elsif ($yalign eq 'Max') {
+		$shiftY = $height - $dy*$scale;
+	    } elsif ($yalign eq 'Mid') {
+		$shiftY = ($height - $dy*$scale)/2;
+	    } else {
+		print "ERROR: bad aspectratio value (for Y): $aspectRatio \n";
+	    }
+	    $zinc->translate($name, $shiftX,$shiftY);
+	    
+	    my $g=$zinc->group($name);
+	    my ($tag)= $zinc->gettags($name); # there should only be one!
+	    $zinc->add('group', $g, -tags => [ "sub$tag" ]);
+	    $zinc->chggroup($name, "sub$tag");
+	    print "clipping with [0,0, $width,$height]\n";
+	    $zinc->add('rectangle', "sub$tag", [0,0, $width+1,$height+1],
+		       -tags => ["clipper_sub$tag"]);
+	    $zinc->itemconfigure("sub$tag", -clip => "clipper_sub$tag"); 
+	}
+	print "\n";
+    }
+}
+
+
+###################################################################
+
+
+1;
-- 
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