[C++, DX11] How to get texture size?

Graphics and GPU Programming Programming DX11

Started by Ripiz June 02, 2011 07:25 AM

1 comment, last by Ripiz 12 years, 10 months ago

Ripiz

539

Author

June 02, 2011 07:25 AM

Hello. I load my texture using this code:

	D3DX11CreateTextureFromFileA(device, sFilename, 0, 0, &textureResource, 0);



	D3D11_SHADER_RESOURCE_VIEW_DESC resourceDesc;

	resourceDesc.Format = DXGI_FORMAT_UNKNOWN;

	resourceDesc.ViewDimension = D3D11_SRV_DIMENSION_TEXTURE2D;

	resourceDesc.Texture2D.MostDetailedMip = 0;

	resourceDesc.Texture2D.MipLevels = -1;

	device->CreateShaderResourceView(textureResource, &resourceDesc, &shaderTextureResource);

But I can't seem figure how to get texture size/resolution which I need for interface rendering. Can anyone help please? Thank you in advance.

e3d_ALiVE

209

June 02, 2011 09:16 AM

Hello. I load my texture using this code:D3DX11CreateTextureFromFileA(device, sFilename, 0, 0, &textureResource, 0); D3D11_SHADER_RESOURCE_VIEW_DESC resourceDesc; resourceDesc.Format = DXGI_FORMAT_UNKNOWN; resourceDesc.ViewDimension = D3D11_SRV_DIMENSION_TEXTURE2D; resourceDesc.Texture2D.MostDetailedMip = 0; resourceDesc.Texture2D.MipLevels = -1; device->CreateShaderResourceView(textureResource, &resourceDesc, &shaderTextureResource);

But I can't seem figure how to get texture size/resolution which I need for interface rendering. Can anyone help please? Thank you in advance.

you have to query ID3D11Texture2D interface from shaderTextureResource,then you have to get description from it with GetDesc
if you don't want or don't know how to query, then u may just call GetDesc from textureResource, it will give you D3D11_TEXTURE2D_DESC structure with all the fields(w,h format e.t.c.) that you need
you can also call D3DX11GetImageInfoFromFile to retrieve information about the file

Crazy dude smoking D3D11, AngelScript, PhysX, 3D Sound, Network, DB, FBX, and some other weird things, doing that on Visual Studio 2010 + Visual Assist X on Overclocked CPU

Ripiz

539

Author

June 03, 2011 12:37 PM

you have to query ID3D11Texture2D interface from shaderTextureResource,then you have to get description from it with GetDesc

Doesn't work, pointer remains NULL.

if you don't want or don't know how to query, then u may just call GetDesc from textureResource, it will give you D3D11_TEXTURE2D_DESC structure with all the fields(w,h format e.t.c.) that you need

textureResource doesn't have GetDesc method, however shaderTextureResource does have it, but it doesn't return information I need

you can also call D3DX11GetImageInfoFromFile to retrieve information about the file

I though that'll be somewhat slow to open file extra time, so I didn't do it.

However, based on your suggestions I managed to Query interface from textureResource and it worked correctly, thank you.



ID3D11Texture2D *pTextureInterface = 0;

textureResource->QueryInterface<ID3D11Texture2D>(&pTextureInterface);

D3D11_TEXTURE2D_DESC desc;

pTextureInterface->GetDesc(&desc);

[C++, DX11] How to get texture size?

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