Get Texture2DDescription from ShaderResourceView

Graphics and GPU Programming Programming

Started by Telanor May 15, 2012 08:17 AM

4 comments, last by Telanor 11 years, 11 months ago

Telanor

1,486

Author

May 15, 2012 08:17 AM

In c++ you can do the following to get the dimensions of a ShaderResourceView:



void foo(ID3D11ShaderResourceView* texture)

{

	ID3D11Resource* resource;

	ID3D11Texture2DPtr texResource;

	D3D11_TEXTURE2D_DESC desc;

	texture->GetResource(&resource);

	texResource.Attach(reinterpret_cast<ID3D11Texture2D*>(resource));

	texResource->GetDesc(&desc);

	perBatch.TextureSize = XMFLOAT2(static_cast<float>(desc.Width), static_cast<float>(desc.Height));

}

I'm trying to accomplish the same thing in SlimDX but I can't seem to figure out how. The logical way seems to be texture.Resource.Description.Width but the Direct3D11.Resource class doesn't have a Description property. Anyone know how to do this in SlimDX?

Washu

7,836

May 15, 2012 08:23 AM

The descriptions are strongly typed. As such you will find them under the derived type from Resource... i.e. Texture2D.Description

In time the project grows, the ignorance of its devs it shows, with many a convoluted function, it plunges into deep compunction, the price of failure is high, Washu's mirth is nigh.

Telanor

1,486

Author

May 15, 2012 08:38 AM

So I do something like this?



var resource = (Texture2D)texture.Resource;

perBatch.TextureSize = new Vector2(resource.Description.Width, resource.Description.Height);

Washu

7,836

May 15, 2012 08:00 PM

I don't think that will work (it might, but doubtful)...

var resource = new Texture2D.FromPointer(texture.Resource.ComPointer);

should work, just remember to dispose of it when done, probably. depending on if you hold a handle to the texture in the resource view or not. (If you do, don't dispose, if you don't, do dispose).

In time the project grows, the ignorance of its devs it shows, with many a convoluted function, it plunges into deep compunction, the price of failure is high, Washu's mirth is nigh.

Mike.Popoloski

3,259

May 15, 2012 08:30 PM

Casting will work just fine. There's no need to use the FromPointer method, which is intended only for interop with external libraries.

Mike Popoloski | Journal | SlimDX

Telanor

1,486

Author

May 15, 2012 09:30 PM

Alright, thanks. I'd test it but I'm still in the process of converting from XNA to slimdx so I can't yet.

Get Texture2DDescription from ShaderResourceView

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Get Texture2DDescription from ShaderResourceView

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