<defs>
    <pattern id="img1" patternUnits="userSpaceOnUse" width="100" height="100">
        <image xlink:href="wall.jpg" x="0" y="0" width="100" height="100" />
    </pattern>
</defs>

<path d="M5,50
     l0,100 l100,0 l0,-100 l-100,0
     M215,100
     a50,50 0 1 1 -100,0 50,50 0 1 1 100,0
     M265,50
     l50,100 l-100,0 l50,-100
     z"
  fill="url(#img1)" />

chart.append("defs")
                  .append('pattern')
                    .attr('id', 'locked2')
                    .attr('patternUnits', 'userSpaceOnUse')
                    .attr('width', 4)
                    .attr('height', 4)
                   .append("image")
                    .attr("xlink:href", "locked.png")
                    .attr('width', 4)
                    .attr('height', 4);