Re: nvidia: how to use overlay

["Antonino A. Daplas" <adaplas@hotpop.com>]

On Thursday 20 January 2005 20:18, feedback@linux-fbdev.sourceforge.net wrote:
> gongpu (gongp03@hotmail.com) has submitted this feedback
> for nvidia
>
> In my project which I\'m working on, I want to display two layer. One is
> for some video information. The other is for some symbols. I know how to
> use frame buffer to write directly to the video ram. But how to implement
> these two layers? SDL sdk gives some overlay functions, but I think it was
> implemented in software. How to use hardware overlay? Of course, I\'m sure
> that my video card surpport this kind of overlay. I\'ll be very appreciated
> if you can tell me how to do it or where I can find relative information.
> Thanks for reading. Waiting for your answer.

Try DirectFB (www.directfb.org).  They have an nvidia driver that supports
multiple layers (usually primary + overlay).  You can use SDL on DirectFB by
the way.

Note: I don't know the status of the DirectFB nvidia driver, but it seems
there is a flurry of development recently.

Tony




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