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#!/opt/tools/bin/perl -w
use strict;
use Tk;
use Data::Dumper;
warn "Tk$Tk::VERSION\n";
my $ps = page_sizes();
my $psize = $ARGV[0];
unless (exists $ps->{$psize})
{
my @sizes = keys %$ps;
die "@sizes\n";
}
my $x = 0;
my $y = 0;
my $dx = $ARGV[1] || 297;
my $dy = $ARGV[2] || 210;
my $mw = MainWindow->new;
my $c = $mw->Canvas(-width => 640, -height=>480);
$c->create('rectangle',$x,$y,$x+$dx,$y+$dy);
$c->create('line',$x,$y,$x+$dx,$y+$dy,-arrow => 'last');
#$c->create('rectangle',0,0,210,297);
#$c->create('line',0,0,210,297,-arrow => 'last');
my %opt = (
# -pageheight => $ps->{$psize}[1].'m',
# -colormode => $mode
);
@opt{'-x','-y','-width','-height'} = $c->bbox('all');
$opt{'-width'} -= $opt{'-x'};
$opt{'-height'} -= $opt{'-y'};
# PS origin is normally SW so avoid deltaX, deltaY
$opt{'-pageanchor'} = 'sw';
$opt{-pagey} = 0;
$opt{'-rotate'} = ($opt{'-width'} > $opt{'-height'}) ? 1 : 0;
if ($opt{-rotate})
{
# x is bigger
$opt{-pagewidth} = $ps->{$psize}[1].'m';
# and we have to shift it right to allow for rotate :-(
$opt{-pagex} = $ps->{$psize}[0].'m';
}
else
{
# y is bigger
$opt{-pageheight} = $ps->{$psize}[1].'m';
$opt{-pagex} = 0;
}
warn Dumper(\%opt);
pseudo_code($c,%opt);
my $text = $c->postscript(%opt);
print $text;
pos($text) = 0;
while ($text =~ /\n((%%BoundingBox.*|\s*\d[\s\d\.-]*(translate|rotate|scale)))/g)
{
warn "$1\n";
}
my %page_sizes;
sub page_sizes
{
unless (keys %page_sizes)
{
my @list;
my ($w,$h) = (297,420);
for my $size (3..5)
{
$page_sizes{"A$size"} = [$w,$h];
($h,$w) = ($w,$h/2);
}
}
return \%page_sizes;
}
sub Points
{
my $s = shift;
return undef unless defined $s;
$s *= 72.0/25.4 if ($s =~ s/m$//);
return $s;
}
sub pseudo_code
{
my ($c,%opt) = @_;
# PostScript transforms are:
my $canvW = $opt{-width} || $c->width;
my $canvH = $opt{-height} || $c->height;
my $canvX = $opt{-x} || $c->canvasx(0);
my $canvY = $opt{-y} || $c->canvasy(0);
my $pageX = exists $opt{-pagex} ? Points($opt{-pagex}) : (72*4.25);
my $pageY = exists $opt{-pagey} ? Points($opt{-pagey}) : (72*5.5);
my $scale = 1;
if ($opt{-pagewidth})
{
$scale = Points($opt{-pagewidth})/$canvW;
}
elsif ($opt{-pageheight})
{
$scale = Points($opt{-pageheight})/$canvH;
}
else
{
# $scale = (72/25.4)*ScreenMM/ScreenPixels;
}
my ($deltaX,$deltaY);
for ($opt{-pageanchor} || 'c')
{
if (/w/) { $deltaX = 0 }
elsif (/e/){ $deltaX = -$canvW }
else { $deltaX = -$canvW/2 }
if (/n/) { $deltaY = -$canvH }
elsif (/s/){ $deltaY = 0 }
else { $deltaY = -$canvH/2 }
}
warn "px=$pageX py=$pageY scale=$scale dx=$deltaX dy=$deltaY w=$canvW h=$canvH\n";
if (!$opt{-rotate})
{
warn '%%'.sprintf("BoundingBox: %d %d %d %d\n",
$pageX + $scale*$deltaX,
$pageY + $scale*$deltaY,
$pageX + $scale*($deltaX + $canvW)+1,
$pageY + $scale*($deltaY + $canvH)+1);
}
else
{
warn '%%'.sprintf("BoundingBox: %d %d %d %d\n",
$pageX - $scale*($deltaY + $canvH)+1,
$pageY + $scale*$deltaX,
$pageX - $scale*$deltaY+1,
$pageY + $scale*($deltaX + $canvW)+1);
}
warn sprintf "translate(%g,%g)\n",$pageX,$pageY;
warn "rotate(90)\n" if $opt{-rotate};
warn sprintf "scale(%g,%g)\n",$scale,$scale;
warn sprintf "translate(%g,%g)\n",$deltaX-$canvX,$deltaY;
}
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