All,
I have a problem writing a new DFB1.2 gfxdriver for the NXP8XXX I am
working on.
I have a current 1.0 driver but I am not happy with just porting it and
decided a rewrite would be good. I have based my rewrite on the davinci
gfxdriver that Dennis has written (will eventually be fed back if I can
get it working :-).
It all seems to be working quite well. except for video layers.
Most people who do PC based stuff use real memory for Video Layers.
However I have no memory for video layers, I need some way to have
virtual surfaces (we use HW streaming). The layers would have a size,
pixel format etc because apps benefit from knowing this but they have no
memory associated.
i.e in Davinci driver Video Lock there is the following:
int index = alloc->offset / alloc->size;
int height = alloc->size / alloc->pitch;
alloc->pitch = ddev->fix[VID1].line_length;
alloc->size = height * alloc->pitch;
alloc->offset = index * alloc->size;
allocation->size = alloc->size;
allocation->offset = alloc->offset;
lock->pitch = alloc->pitch;
lock->offset = alloc->offset;
lock->addr = local->mem + alloc->offset;
lock->phys = local->phys + alloc->offset;
However I have no addr, no phys memory etc and I need to fill in the
values of DirectFB goes wrong internally.
Any idea of where to start?
Cheers
Daniel Laird
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