#!/usr/bin/perl

use PDF::API2;
use PDF::API2::Util;
use POSIX;
use Math::Trig;

my $cx=315;
my $cy=400;
my $cr=15;
my $cs=32;
my $ang=30;

$pdf=PDF::API2->new;
$pdf->mediabox(595,842);

$fnt=$pdf->corefont('Verdana-Bold');

foreach my $z (0 .. 0xf) {
    $page = $pdf->page;
    $gfx=$page->gfx;
    
    $gfx->textlabel(300,750,$fnt,20,'RGB Colorspace',-color=>'#000',-hspace=>125,-center=>1);

    $gfx->strokecolor('#000');

    foreach my $x (0 .. 0xf) {
        foreach my $y (0 .. 0xf) {
            my $t=sprintf('#%01X%01X%01X',$x,$z,$y);
            $gfx->fillcolor($t);
            $gfx->circle($cx+($x-8)*$cs,$cy+($y-8)*$cs,$cr);
            $gfx->fillstroke;
            $gfx->textlabel($cx+($x-8)*$cs,$cy+($y-8)*$cs,$fnt,8,$t,-color=>'#000',-rotate=>$ang,-hspace=>85,-center=>1);
        }
    }
}

foreach my $z (0 .. 0xf) {
    $page = $pdf->page;
    $gfx=$page->gfx;
    
    $gfx->textlabel(300,750,$fnt,20,'RGB Colorspace (Gamma=2.2)',-color=>'#000',-hspace=>125,-center=>1);

    $gfx->strokecolor('#000');

    foreach my $x (0 .. 0xf) {
        foreach my $y (0 .. 0xf) {
            my $t=sprintf('#%01X%01X%01X',$x,$z,$y);
            $gfx->fillcolor($x/0xf,$z/0xf,$y/0xf);
            $gfx->circle($cx+($x-8)*$cs,$cy+($y-8)*$cs,$cr);
            $gfx->fillstroke;
            $gfx->textlabel($cx+($x-8)*$cs,$cy+($y-8)*$cs,$fnt,8,$t,-color=>'#000',-rotate=>$ang,-hspace=>85,-center=>1);
        }
    }
}

foreach my $z (0 .. 0xf) {
    $page = $pdf->page;
    $gfx=$page->gfx;
    
    $gfx->textlabel(300,750,$fnt,20,'CMYK Colorspace',-color=>'#000',-hspace=>125,-center=>1);

    $gfx->strokecolor('#000');

    foreach my $x (0 .. 0xf) {
        foreach my $y (0 .. 0xf) {
            my $t=sprintf('%%%01X%01X%01X0',$x,$z,$y);
            $gfx->fillcolor($t);
            $gfx->circle($cx+($x-8)*$cs,$cy+($y-8)*$cs,$cr);
            $gfx->fillstroke;
            $gfx->textlabel($cx+($x-8)*$cs,$cy+($y-8)*$cs,$fnt,8,$t,-color=>'#000',-rotate=>$ang,-hspace=>85,-center=>1);
        }
    }
}

foreach my $z (0 .. 0xf) {
    $page = $pdf->page;
    $gfx=$page->gfx;
    
    $gfx->textlabel(300,750,$fnt,20,'Lab Colorspace',-color=>'#000',-hspace=>125,-center=>1);

    $gfx->strokecolor('#000');

    foreach my $x (0 .. 0xf) {
        foreach my $y (0 .. 0xf) {
            my $t=sprintf('$%01X%01X%01X',$z,$x,$y);
            $gfx->fillcolor($t);
            $gfx->circle($cx+($x-8)*$cs,$cy+($y-8)*$cs,$cr);
            $gfx->fillstroke;
            $gfx->textlabel($cx+($x-8)*$cs,$cy+($y-8)*$cs,$fnt,8,$t,-color=>'#000',-rotate=>$ang,-hspace=>85,-center=>1);
        }
    }
}

my @cols=sort keys %PDF::API2::Util::colors;

while (scalar @cols > 0) {
    $page = $pdf->page;
    $gfx=$page->gfx;
    
    $gfx->textlabel(300,750,$fnt,20,'Named Colors (RGB)',-color=>'#000',-hspace=>125,-center=>1);

    $gfx->strokecolor('#000');

    foreach my $x (0 .. 0xf) {
        last if(scalar @cols == 0);
        foreach my $y (0 .. 0xf) { 
            last if(scalar @cols == 0);
            my $t=shift @cols;
            $gfx->fillcolor($t);
            $gfx->circle($cx+($x-8)*$cs,$cy+($y-8)*$cs,$cr);
            $gfx->fillstroke;
            $gfx->textlabel($cx+($x-8)*$cs,$cy+($y-8)*$cs,$fnt,7,$t,-color=>'#000',-rotate=>$ang,-hspace=>85,-center=>1);
        }
    }
}

$pdf->saveas("$0.pdf");
$pdf->end();

exit;

__END__