3D graphics questions that do not deserve their own thread (OpenGL / Dx10)

The Something Awful Forums > Discussion > Serious Hardware/Software Crap > The Cavern of COBOL > 3D graphics questions that do not deserve their own thread (OpenGL / Dx10)

Falcorum: Oct 21, 2010

You can also use bindless textures, but those are a recent-ish feature and aren't really present on older cards.

# ¿ Jan 20, 2015 13:48

Adbot: ADBOT LOVES YOU

# ¿ Apr 29, 2024 06:11

Falcorum: Oct 21, 2010

OneEightHundred posted:

How do you debug a compute shader in D3D if you're not rendering anything? AFAICT all of VS's graphics debugging stuff depends on frame capture, and it doesn't capture anything if a frame is never rendered.

Try renderdoc. As an added bonus if it works, you can live edit your compute shader.

# ¿ Apr 4, 2018 16:44

Falcorum: Oct 21, 2010

Augh GPU time.

I have a compute shader using a RWTexture2DArray that does:

code:

Texture[coords] = max(Texture[coords], 0.5f);

(it's a minimum repro case, long story :v:

)

Which works fine on a GTX 980, however on both a R480 and GTX 770 it does something along the lines of:

code:

Texture[coords] = Texture[coords] + 0.5f; // except it's more like 0.3 or something else, and just occasionally turns to NANs because why not

Time to look at the assembly output and see if the compiler's trying to be smart. :ughh:

# ¿ Oct 8, 2018 02:54

Falcorum: Oct 21, 2010

D3D11, turns out the NAN stuff was a red herring and it was actually because I was reading and writing using a RWTexture2DArray for a cubemap. Turns out reading like that's fine on a 980 but breaks horribly in everything else (hurrah). Fixed by switching to doublebuffering and reading using a TextureCube and writing with a RWTexture2DArray. :shrug:

# ¿ Oct 9, 2018 17:12

The Something Awful Forums > Discussion > Serious Hardware/Software Crap > The Cavern of COBOL > 3D graphics questions that do not deserve their own thread (OpenGL / Dx10)