Am 22.11.2017 um 16:56 schrieb Rob Clark:
> So, I could potentially do this for a5xx, which actually has a sort of
> blit engine. But for earlier gen's, everything is a glDraw(), and I
> don't want to duplicate the functionality of u_blitter.
>
> I suppose I could bypass util_blitter_blit() and u
I don't have anything against driver-specific hacks in u_blitter,
because it already contains a lot of that, although separated in
special functions.
For buffer blitting, I recommend using DMA. Your hw should have it,
because it's roughly based on radeon, which has had CP DMA since r200.
If not,
So, I could potentially do this for a5xx, which actually has a sort of
blit engine. But for earlier gen's, everything is a glDraw(), and I
don't want to duplicate the functionality of u_blitter.
I suppose I could bypass util_blitter_blit() and use
util_blitter_blit_generic() directly..
BR,
-R
O
I don't think this is a good idea.
1D and buffer resources are fundamentally incompatible, it is highly
illegal to use targets in views which are incompatible, so I'd rather
not see such atrocities in shared code.
I think you really want to fix up your resource_copy_region
implementation one way or
yes, because that ends up being a cpu copy for BUFFER (ie. stall),
which is what I'm trying to avoid in the first place ;-)
Maybe this needs to map things to a linear 2d buffer for larger sizes,
not sure. One way or another at the hw level this gets treated like a
2d render target (which might ha
Are you sure you're not looking for resource_copy_region? BUFFERs can
be wide (128MB in many impls), 1D textures can't. There are probably
other differences.
On Wed, Nov 22, 2017 at 9:43 AM, Rob Clark wrote:
> It is useful for staging/shadow transfers for drivers to be able to blit
> BUFFERs. Tr
It is useful for staging/shadow transfers for drivers to be able to blit
BUFFERs. Treat them as R8 1D textures for this purpose.
Signed-off-by: Rob Clark
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This works at least if 1D textures are linear, so I suppose might not
work for all drivers. Although I'm not entirely sure what the point
