#!/usr/bin/perl -w

use strict;
use GD;		# this lib is so cool

my $imagename = shift;

# get the user specified image
my $image = GD::Image->new($imagename) || die "Could not open image: $imagename\n";

# get the image size
my ($width, $height) = $image->getBounds();

# build the seed color...
my $index = $image->getPixel(0, 0);
my ($r,$g,$b) = $image->rgb($index);

# now format it as 2 digit hex
my $color = sprintf "%02x%02x%02x", $r, $g, $b;

my $lastcolor = "";
my $count;

# the stylesheet is necessary to make the end result acceptably small
my $results = "<STYLE>.sm { font-size: 2px; font-family: sans-serif }</STYLE>\n";

$results .= "<TABLE BORDER=0 CELLPADDING=0 CELLSPACING=0 WIDTH=$width HEIGHT=$height>";

# loop through the pixels
for (my $x = 0; $x < $height; $x++) {
        $count = 0;
        $results .= "<TR>";
        for (my $y = 0; $y < $width; $y++) {
                $count++;

                # get the color of the current pixel
                $index = $image->getPixel($y, $x);
                ($r,$g,$b) = $image->rgb($index);
                $color = sprintf "%02x%02x%02x", $r, $g, $b;

                # we use this to build a COLSPAN length
                # this greatly enhances efficiency
                if ($color ne $lastcolor) {
                        $count = $count * 2;
                        $results .= "<TD CLASS=sm BGCOLOR=\"$lastcolor\" COLSPAN=$count>_</TD>";
                        $count = 0;
                }

                $lastcolor = $color;
        }
        $count = $count * 2;
        $results .= "<TD CLASS=sm BGCOLOR=\"$lastcolor\" COLSPAN=$count>_</TD>";
        $results .= "</TR>\n";
}
$results .= "</TABLE>";

print "$results\n";