AutoCAD Preview image extraction

Hi, We're developing a site for work collaboration (It's not part of the project). Users will upload/download .dwg files. What want is a preview image of the file content (drawing) to put near the file name to make it easier for the user to find the right file without downloading it. The project is: an utility to extract the preview image embedded in the .dwg file (if there is one) or, even better, a utility to create such a preview image. The developer of the site will code it so that it will "pass" the file (after the uploading process) to the utility and the utility will "return" the preview image (preferably .png). There is a perfect tool for that in the AutoDWG site, but they only work with Windows, no Linux... Thanks. ## Deliverables 1) Complete and fully-functional working program(s) in executable form as well as complete source code of all work done. 2) Deliverables must be in ready-to-run condition, as follows (depending on the nature of the deliverables): a) For web sites or other server-side deliverables intended to only ever exist in one place in the Buyer's environment--Deliverables must be installed by the Seller in ready-to-run condition in the Buyer's environment. b) For all others including desktop software or software the buyer intends to distribute: A software installation package that will install the software in ready-to-run condition on the platform(s) specified in this bid request. 3) All deliverables will be considered "work made for hire" under U.S. Copyright law. Buyer will receive exclusive and complete copyrights to all work purchased. (No GPL, GNU, 3rd party components, etc. unless all copyright ramifications are explained AND AGREED TO by the buyer on the site per the coder's Seller Legal Agreement). ## Platform The utility (server side, there is no client side) and the site will run on a Linux/Apache/PHP/MySql environment (and therefore has no AutoCAD libraries).