Drupal 7 - 'Text on Image' Conversion

How can we convert the contents of the article into image/pdf format in drupal 7.

Suppose, we are viewing a article in some textformat (ie default format of drupal) and if we want to see the contents of article on开发者_运维知识库 a image format.

I'm dealing with content that is some value and can't be openly published without any security. Though i know its baseless to restrict others from copying the content, but still i like doing my own piece of work to stop content copying.

you can also use a module Cufon for text1 to image conversion