Render to Texture2DArray slices in DirectX11?(转自GAMEDEV)

5 down vote favorite

I would like to set a slice of a Texture2DArray as a render target in D3D/DirectX11. It's not clear how to do this. What I'm looking for is the DirectX equivalent of glFramebufferTextureLayer(), which sets a slice of a GL_TEXTURE_2D_ARRAY_EXT as a texture resource of a Framebuffer Object. In D3D11, you set a render target using ID3D11DeviceContext::OMSetRenderTargets, and you can set a Texture2DArray resource view as a render target. However, the only way I see to select which slice of the texture is painted is to use the SV_RenderTargetArrayIndex semantic in an HLSL geometry shader. (The semantic is only available in a geometry shader). My pipline doesn't have a geometry shader, and I don't know at compile time which primitive type I will be rendering - I'm reading models out of input files. It seems like, to add a passthrough geometry shader I would need one shader program for every possible primitive type (terrible). The desired output slice will not change between rendering passes. Is there no way to set a slice of a Texture2DArray as a render target without using a geometry shader?

2 down vote accepted

You can create separate render target views for every slice and then set it using ID3D11DeviceContext::OMSetRenderTargets. D3D11_RENDER_TARGET_VIEW_DESC desc; desc.ViewDimension = D3D11_RTV_DIMENSION_TEXTURE2D; desc.Texture2D.MipSlice = D3D11CalcSubresource(0, arraySlice, mipLevels); Information about subresources http://msdn.microsoft.com/en-us/library/ff476901%28v=vs.85%29.aspx share | improve this answer edited Jul 22 '11 at 16:27 answered Jul 22 '11 at 16:18 KindDragon 217 2 8

Yup, that works. Thanks! edit: what I actually did was create an array of Texture2DArray targets, with the start slice set to the i'th slice: RenderTarget = new ID3D11RenderTargetView*[targets]; for(USHORT i=0;iCreateRenderTargetView(m_pInputView, &srtDesc, &RenderTarget[i]); } –  matth Jul 25 '11 at 17:24