How to write an X driver..?

[Daniel Stone]

On Mon, Jan 12, 2009 at 03:23:48PM +0100, Stephane Marchesin wrote:
> On Mon, Jan 12, 2009 at 14:35, Florian Echtler <floe at butterbrot.org> wrote:
> > But can you explain "shadowfb approach" in more detail? I've seen the
> > phrase in the fbdrv manual already; does that mean that the X driver
> > maintains a copy of the framebuffer content in memory and only tries to
> > transmit changed regions?
> 
> Yes shadowfb does just that. A couple of drivers implement it, look at
> nv or radeon for example. On the plus side you get a very small driver
> and you just have to implement a copy hook, the regions are determined
> by the X server for you.

Or avivo is a much more simple example.

Cheers,
Daniel
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