If you want the image embedded into the rest of an output HTML page, I have a column on that, so you can use that as a starting point.

-- Randal L. Schwartz, Perl hacker

    use GD;
    
    # create a new image
    $im = new GD::Image(100,100);

    # allocate some colors
    $white = $im->colorAllocate(255,255,255);
    $black = $im->colorAllocate(0,0,0);       
    $red = $im->colorAllocate(255,0,0);      
    $blue = $im->colorAllocate(0,0,255);

    # make the background transparent and interlaced
    $im->transparent($white);
    $im->interlaced('true');

    # Put a black frame around the picture
    $im->rectangle(0,0,99,99,$black);

    # Draw a blue oval
    $im->arc(50,50,95,75,0,360,$blue);

    # And fill it with red
    $im->fill(50,50,$red);

    # make sure we are writing to a binary stream
    binmode STDOUT;

    print "Content-type: image/png\n\n"; #as [merlyn] said

    # Convert the image to PNG and print it on standard output
    print $im->png;
[download]

UPDATE: fixed the error in the content type string

print "Content-type img/png\n\n";
[download]

Wow, that's even more broken than I usually see it. I wonder if that even works anywhere!

Correct code:

print "Content-type: image/png\n\n";
[download]

-- Randal L. Schwartz, Perl hacker