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#!/usr/bin/perl
# show color separations
use strict;
use warnings;
use PDF::Builder;
use PDF::Builder::Util;
use POSIX;
use Math::Trig;
#my $compress = 'none'; # uncompressed streams
my $compress = 'flate'; # compressed streams
my $cx = 50;
my $cy = 50;
my $cr = 15;
my $cs = 32;
my $ang = 30;
my $pdf = PDF::Builder->new(-compress => $compress);
$pdf->mediabox(595,842);
my $fnt = $pdf->corefont('Verdana-Bold');
my $page = $pdf->page();
my $gfx = $page->gfx();
my $text = $page->text();
$text->linewidth(0);
$text->render(2);
$text->textlabel(300,750, $fnt,20, 'Separation Colorspace(s)', -color=>'#000', -hscale=>125, -center=>1);
$text->strokecolor('#000');
# colored section
my $y = 0;
foreach my $csn (qw( Red %0ff0 Green %f0f0 Blue %ff00 Cyan %f000 Magenta %0f00 Yellow %00f0 )) {
my $csp = $pdf->colorspace_separation($csn, $csn);
# row labels on left
$text->textlabel($cx,$cy+($y*$cs)+14, $fnt,8, $csn, -color=>'#000', -hscale=>85, -right=>1);
# 16 circles L to R 0..1
foreach my $x (0 .. 0xf) {
$gfx->fillcolor($csp, sprintf('%0.4f',$x/0xf));
$gfx->circle($cx+($x+1)*$cs,$cy+($y+0.5)*$cs, $cr);
$gfx->fillstroke();
$text->textlabel($cx+($x+1)*$cs,$cy+($y+0.5)*$cs-2, $fnt,8, sprintf('%0.4f',$x/0xf), -color=>'#000', -hscale=>85, -center=>1);
}
$y++;
}
# gray ('All') row
my $csp = $pdf->colorspace_separation('All', '#000');
$text->textlabel($cx,$cy+($y*$cs)+14, $fnt,8, 'All', -color=>'#000', -hscale=>85, -right=>1);
foreach my $x (0 .. 0xf) {
$gfx->fillcolor($csp, sprintf('%0.4f',$x/0xf));
$gfx->circle($cx+($x+1)*$cs,$cy+($y+0.5)*$cs, $cr);
$gfx->fillstroke();
$text->textlabel($cx+($x+1)*$cs,$cy+($y+0.5)*$cs-2, $fnt,8, sprintf('%0.4f',$x/0xf), -color=>'#000', -strokecolor=>'#FFF', -hscale=>85, -center=>1);
}
$y++;
# 'None' row
$csp = $pdf->colorspace_separation('None', '#000');
$text->textlabel($cx,$cy+($y*$cs)+14, $fnt,8, 'None', -color=>'#000', -hscale=>85, -right=>1);
foreach my $x (0 .. 0xf) {
$gfx->fillcolor($csp, sprintf('%0.4f',$x/0xf));
$gfx->circle($cx+($x+1)*$cs,$cy+($y+0.5)*$cs, $cr);
$gfx->fillstroke();
$text->textlabel($cx+($x+1)*$cs,$cy+($y+0.5)*$cs-2, $fnt,8, sprintf('%0.4f',$x/0xf), -color=>'#000', -hscale=>85, -center=>1);
}
$y++;
delete $gfx->{'Filter'};
$pdf->saveas("$0.pdf");
$pdf->end();
exit;
__END__
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