Sparklines are something that I haven't seen mentioned on perlmonks so far. Sparklines are small graphs that are base64 encoded and embededded into plain html (see:
http://www.ietf.org/rfc/rfc2397.txt for further details). There is already a module on cpan:
GD::Graph::sparklines to build line-graphs as sparklines. My snippet is just a quick hack to show a way to build different kind of sparklines using GD and MIME::Base64 :
#!/usr/bin/perl
use strict;
use warnings;
use GD::Graph;
use GD::Graph::pie;
use MIME::Base64;
my @data = (
["1st","2nd"],
[ 1, 2],
);
my $graph = new GD::Graph::pie( 120, 120 );
$graph->set( dclrs => [ qw( #FECECE #FEFECE #FFFFFF ) ],
start_angle => 90 );
my $gd = $graph->plot(\@data) or die $graph->error;
print '<IMG SRC="data:image/png;base64,',
encode_base64($gd->png),
'" alt="sparkline"/>';
