Capture homepage screenshot

Hello, How can i capture homepage screenshot of a webpage by php? I know a way. I'll run a executable written in C/C++. when It will be called to process a screen shot It will just load the webpage in firefox and capture the image. It'll send the image path to php. The executable will be running. The problem with this solution is, I have to run X, Firefox in my web server, which doesn't look efficient for a server. I wanna know, is there any other way to achieve this? without creating a screen shot server. Thanks Shiplu http://talk.cmyweb.net/