ruby on rails - How to create circular images using Prawn -

is possible clip or apply mask image using prawn.

for example, i'm embedding image pdf using image http://path/to/image. image square, pdf design requires circle.

with html/ css apply radius image achieve effect. there way similar prawn?

based on sunil-antony's answer, came following solution (using save_graphics_state enclose drawing instructions, see prawn documentation):

prawn::document.generate("x.pdf")    image_width = 200   image_x = 100   image_y = 100     save_graphics_state     soft_mask        fill_color 0,0,0,0        fill_circle [image_x + image_width/2, image_y - image_width/2], image_width/2     end       image "example.jpg", at: [image_x, image_y], width: image_width, height: image_width   end end