SYNOPSIS
        use Image::Size;
        # Get the size of globe.gif
        ($globe_x, $globe_y) = imgsize("globe.gif");
        # Assume X=60 and Y=40 for remaining examples

        use Image::Size 'html_imgsize';
        # Get the size as 'width="X" height="Y"' for HTML generation
        $size = html_imgsize("globe.gif");
        # $size == 'width="60" height="40"'

        use Image::Size 'attr_imgsize';
        # Get the size as a list passable to routines in CGI.pm
        @attrs = attr_imgsize("globe.gif");
        # @attrs == ('-width', 60, '-height', 40)

        use Image::Size;
        # Get the size of an in-memory buffer
        ($buf_x, $buf_y) = imgsize(\$buf);
        # Assuming that $buf was the data, imgsize() needed a reference to a scalar