* Questions about libdrm programming
@ 2011-06-11 1:03 Zachary Catlin
2011-06-11 1:39 ` Dave Airlie
0 siblings, 1 reply; 3+ messages in thread
From: Zachary Catlin @ 2011-06-11 1:03 UTC (permalink / raw)
To: dri-devel
I'm interested in (1) using my graphics card for computations and
(2) low-level shader code, and I'm looking for guidance on how I would
go about doing the following operations with libdrm (sans Mesa):
* client-side initialization
* loading textures into the GPU
* loading a bytecode shader into the GPU
* creating a texture on the GPU without uploading data
* running the shader using the uploaded textures as inputs and the
non-uploaded texture as the output
* transferring the output texture into main memory
* tear-down, finalization
The GPU in question is a Radeon RV730, if any hardware-dependent
discussion is needed. I've tried to understand the workflow by looking
at the Mesa and Plymouth sources and the documentation I've found for
the DRI/DRM, but I could still use some guidance.
^ permalink raw reply [flat|nested] 3+ messages in thread
* Re: Questions about libdrm programming
2011-06-11 1:03 Questions about libdrm programming Zachary Catlin
@ 2011-06-11 1:39 ` Dave Airlie
2011-06-11 3:34 ` Zachary Catlin
0 siblings, 1 reply; 3+ messages in thread
From: Dave Airlie @ 2011-06-11 1:39 UTC (permalink / raw)
To: Zachary Catlin; +Cc: dri-devel
On Sat, Jun 11, 2011 at 11:03 AM, Zachary Catlin <z@zc.is> wrote:
> I'm interested in (1) using my graphics card for computations and
> (2) low-level shader code, and I'm looking for guidance on how I would
> go about doing the following operations with libdrm (sans Mesa):http://cgit.freedesktop.org/~airlied/radeondemo
Its not something libdrm really does, its only a simple abstraction
around ioctls.
http://cgit.freedesktop.org/~airlied/radeondemo
is a simple layer on top that just does some blits using the shaders
from the DDX.
Dave.
^ permalink raw reply [flat|nested] 3+ messages in thread
* Re: Questions about libdrm programming
2011-06-11 1:39 ` Dave Airlie
@ 2011-06-11 3:34 ` Zachary Catlin
0 siblings, 0 replies; 3+ messages in thread
From: Zachary Catlin @ 2011-06-11 3:34 UTC (permalink / raw)
To: Dave Airlie; +Cc: dri-devel
On Sat, 11 Jun 2011 11:39:39 +1000
Dave Airlie <airlied@gmail.com> wrote:
> Its not something libdrm really does, its only a simple abstraction
> around ioctls.
I'd managed to figure that out--I just figured the abstraction was
there to save a little typing and act as a type-level sanity check.
> http://cgit.freedesktop.org/~airlied/radeondemo
>
> is a simple layer on top that just does some blits using the shaders
> from the DDX.
This is the sort of thing I tried to find. Thanks!
--
Zachary Catlin z@zc.is
The only way of discovering the limits of the possible is to
venture a little way past them into the impossible.
--Clarke's Second Law
^ permalink raw reply [flat|nested] 3+ messages in thread
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