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Therefore the DX10 documentation states sth. for CreateRenderTargetView, but not for CreateShaderResourceView:
Texture Views (Direct3D 10)
"Create a view object for a render target by calling CreateRenderTargetView. ... You can use a subresource (a mipmap level, array index combination) to bind to any array of subresources. So you could bind to the second mipmap level and only update this particular mipmap level."
MSDN Texture Views (Direct3D 10)
So I ask my self if this works for CreateShaderResourceView, too. The example code I appended below realizes my allocation task in its simples form. The runtime brings an E_OUTOFMEMORY error. The key argument to CreateShaderResourceView is the D3D10_SHADER_RESOURCE_VIEW_DESC structure. For an TextureArray2D it uses 4 fields to controll the view binding.
FirstArraySlice: first slice of array
ArraySize: number of array slices to bind from FirstArraySlice on
MostDetailedMip: index of mip level you want to use
MipLevels: number of mip levels you want to use from MostDetailedMip on
For further comments, please see source code. I encourage you to copy it to a test project for a trial. Its ready for usage. You just have to initialize the D3D10Device correctly.
ID3D10Device *dev; //get a device from somewhere
ID3D10Texture2D *m_texture; //our test tetxure
ID3D10ShaderResourceView **m_srv; //our array of binded mip levels for all slices each
UINT width=8; //texture width
UINT height=8; //texture height
UINT sliceCount=8; //number of array elements in texture array
UINT mipCount=4; //number of all mip levels for size 8x8 (1+log(8)/log(2))
m_srv=new ID3D10ShaderResourceView*[sliceCount]; //create shader resource view array
D3D10_TEXTURE2D_DESC desc;
ZeroMemory(&desc, sizeof(desc)); //zero out description of texture
desc.Format=DXGI_FORMAT_R32_FLOAT;
desc.Width=width;
desc.Height=height;
desc.ArraySize=sliceCount;
desc.MipLevels=0; //automatic calculation of all mip levels
desc.BindFlags=D3D10_BIND_SHADER_RESOURCE|D3D10_BIND_RENDER_TARGET; //shader resource and render target
//desc.CPUAccessFlags=0;
//desc.MiscFlags=0;
//desc.Usage=0;
desc.SampleDesc.Count=1; //default sampling
//desc.SampleDesc.Quality=0;
dev->CreateTexture2D(&desc, NULL, &m_texture); //create texture
D3D10_SHADER_RESOURCE_VIEW_DESC srvDesc;
ZeroMemory(&srvDesc, sizeof(srvDesc)); //zero out shader resouce view description
srvDesc.Format=DXGI_FORMAT_R32_FLOAT;
srvDesc.ViewDimension=D3D10_SRV_DIMENSION_TEXTURE2DARRAY; //its an texture array 2d
srvDesc.Texture2DArray.FirstArraySlice=0; //we want all slices, so begin at 0
srvDesc.Texture2DArray.ArraySize=sliceCount; //we want all slices, so take all
for(UINT s=0;s<mipCount;++s) //create a view for each mip slice/mip level
{
srvDesc.Texture2DArray.MostDetailedMip=s; //this is our mip level index, this most detailed for the binded resource
srvDesc.Texture2DArray.MipLevels=1; //we just want one mip map
dev->CreateShaderResourceView(m_texture, &srvDesc, &m_srv); <span class="cpp-comment">//create mip map</span>
}
</pre></div><!–ENDSCRIPT–>
So what do guys say… my error or sth. other strange?
Cheers
Maik
