Hello, I'm starting to use puredata recently, and I'd like to know if there exists a simple way to put a real-time mirror of the canvas into a gem window, for example, to overlay the images I want to display with the puredata objects I use to generate them.

Someone told me in max/msp there is an object called DesktopJitter that does that. In theory it should be easy, as both the GEM windows and the canvas are displayed by the same graphic card. However, someone told me the graphic objects are managed in a weird way in PD so -even if it's perhaps not related-, I am not sure I can find how to do it. And I have no idea of how the canvas is managed in PD. Some advice? Thanks, Joan

PS. Unfortunately, I'm mainly working on Windows. However, if a solution exists only for mac or linux, I'll be happy to hear about it.