Re: Re: [UFO-devel] Xv support using GLX in libUFO...

[<joe...@op...>]

> > I'm working on a project which displays digital TV on an Epia box 
> using the
> > mpeg acceleration (through XvMC). I previously used fltk as its OSD
> > interface, but I'd like to use libUFO to allow me to get 3D objects
> > overlayed on TV. I previously had a GLX program which had 3D objects 
> over
> > TV (which I still have working), but my efforts today with libUFO have 
> hit
> > a bit of a dead end.
> >
> > I have used the UXGLXDriver and taken the Window and Display * from it
> 
> You take the window from the GLX video device (UXGLXDevice or sth.) 
> right?
> The glx driver just knows of the root window.

Yep.

> > fed them to the XvMC startup program, but it doesn't seem to work ;
> 
> You pure GLX program did work?

Yes and it still does. I have 2 squares in 3D overlayed on top of a playing DVB stream.

> I do not have experience with mixing GL with other drawing stuff.
> How does XvMC draws its videos? Via Xlib?

It uses Xvideo - which is chromakeyed on by the hardware (every pixel of a set colour is replaced by a pixel from a separate given framebuffer when the pixel colour is sent out to the monitor - no data copying required).

> > Am I missing something obvious ?
> > Does this sound like it is doable ? (in fullscreen ?)
> 
> Hmm, do you have some sort of a minimal example?

The minimal example is quite big. I'll try to make one using simple Xv if I can (I have one somewhere, but....)

> How did you intialize your GLX window in your pure GLX environment?

Slightly differently to the way UFO does it I think. I'm working down the path of using the dummy driver and given UFO the context once its created... but now I seem to be having trouble opening the DVB card (!)

Thanks for the reply.

Bye - Joel.