[directfb-dev] Re: Want to Help

[Denis Oliver Kropp <dok@convergence.de>]

Quoting Wood, David (DWood@daedalcorp.com):
> I haven't looked at the tdfx source, is there a list somewhere that shows
> what has been accelerated in the existing driver and what hasn't?

There are macros like TDFX_SUPPORTED_* that help filtering supported
and unsupported functions/flags. This is a common design of the drivers,
it's not required, driver implementors are free how to implement CheckState
(function that checks if one particular function is supported with the
given state) and SetState (actually programming/updating registers to
perform a function with the given state). CheckState and SetState are
called by gfxcard_check_state and gfxcard_acquire_state in gfxcard.c.
CheckState uses a simple bit logic caching mechanism for not to ask
the driver each time again.

I would appreciate writing a driver development based on questions
and answers in this mailing list. So please ask ;)

-- 
Denis Oliver Kropp
( convergence           )
( integrated media gmbh )


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