Hello to everybody,

I am working on a open-source project for realtime video processing tool, and I'd need to make the OS believe that a new monitor has been plugged in even if it is not true. If it is possible, then I would hijack the video output and pipe it to a Syphon server for further video processing. What do you think?

I hope this is not too much OT, but I'm sure that somebody in this forum could know the answer..

Thanks!!

t.

Hi toadspit,

Glad to see you again.
I think the most dagerous problem is to block DDC/I2C. May be it is possible to rewrite IOGraphicFamily to make FakeDisplay.

Regards.

Hi slice!

Actually I found a open source virtual framebuffer implementation (https://github.com/mkernel/EWProxyFramebuffer) that builds in a kext and emulate an additional display, but it resides in CPU memory and obviously it is not hardware accelerated. The open source NVidia drivers are a bit cryptic, don't know where to put my hands in. I suppose that this FakeDisplay should also emulate VBL with a timed interrupts.
uff.
t.