// Define this once and before it will be called, hence at the top of this file
function DrawRefimg(fig, img, canvas, orig_face )
{
    context=canvas.getContext('2d')
    // another call to this func will occur on load, so skip this one
    if( img.width == 0 )
        return

    // only set canvas.width once we have valid img dimensions
    canvas.width=img.width/(img.height/canvas.height)

    // actually draw the pixel images to the canvas at the right size
    context.drawImage(img, 0, 0, img.width/(img.height/canvas.height), canvas.height);
    fig.width(canvas.width)
}