Hello guys, sup

Anti Aliasing in DX11 can be used if I set number of samples equal to 4 and set the sample quality to 1 and set View Dimension of the Dpeth Stencil view desc to D3D11_DSV_DIMENSION_TEXTURE2DMS.

but i have some question about it:

1. I can't apply this on my backbuffer, if i do, i'll get the complete black screen. (don't know what is the reason)

2. the only option i had was Depth/Stencil buffer but after applying these settings, i still didn't receive the correct result from my output. but based on MSDN resource when I create my Texture2D using CreateTexture2D(), the second attribute pInitialData can't be null if i want to use Multi Samples. but i don't know to what I have to set the pSysMem ?

3. since i use RenderToTexture method, am I have to apply these adjustments on those textures that i render my scene on them ?

4. is there any kind of limits for number of AA samples ?

you can take a look at my codes if you want :

	//Describe our SwapChain Buffer
	DXGI_MODE_DESC bufferDesc;

	ZeroMemory(&bufferDesc, sizeof(DXGI_MODE_DESC));	

	bufferDesc.Width = Width;
	bufferDesc.Height = Height;
	bufferDesc.RefreshRate.Numerator = 60;
	bufferDesc.RefreshRate.Denominator = 1;
	//bufferDesc.Format = DXGI_FORMAT_R8G8B8A8_UNORM;
	bufferDesc.Format = DXGI_FORMAT_B8G8R8A8_UNORM;
	bufferDesc.ScanlineOrdering = DXGI_MODE_SCANLINE_ORDER_UNSPECIFIED;
	bufferDesc.Scaling = DXGI_MODE_SCALING_UNSPECIFIED;

	//Describe our SwapChain
	DXGI_SWAP_CHAIN_DESC swapChainDesc;

	ZeroMemory(&swapChainDesc, sizeof(DXGI_SWAP_CHAIN_DESC));

	swapChainDesc.BufferDesc = bufferDesc;
	swapChainDesc.SampleDesc.Count = 1;
	swapChainDesc.SampleDesc.Quality = 0;
	swapChainDesc.BufferUsage = DXGI_USAGE_RENDER_TARGET_OUTPUT;
	swapChainDesc.BufferCount = 1;
	swapChainDesc.OutputWindow = hwnd;
	swapChainDesc.Windowed = TRUE;
	swapChainDesc.SwapEffect = DXGI_SWAP_EFFECT_DISCARD;


	//Create our SwapChain
	hr = D3D11CreateDeviceAndSwapChain(NULL, D3D_DRIVER_TYPE_HARDWARE, NULL, NULL, NULL, NULL,
		D3D11_SDK_VERSION, &swapChainDesc, &SwapChain, &d3d11Device, NULL, &d3d11DevCon);

	//Create our BackBuffer
	ID3D11Texture2D* BackBuffer;
	hr = SwapChain->GetBuffer(0, __uuidof(ID3D11Texture2D), (void**)&BackBuffer);

	//Create our Render Target
	hr = d3d11Device->CreateRenderTargetView(BackBuffer, NULL, &renderTargetView);
	BackBuffer->Release();

	//Describe our Depth/Stencil Buffer
	D3D11_TEXTURE2D_DESC depthStencilDesc;

	depthStencilDesc.Width = Width;
	depthStencilDesc.Height = Height;
	depthStencilDesc.MipLevels = 1;
	depthStencilDesc.ArraySize = 1;
	depthStencilDesc.Format = DXGI_FORMAT_D24_UNORM_S8_UINT;
	depthStencilDesc.SampleDesc.Count = 4;
	depthStencilDesc.SampleDesc.Quality = 1;
	depthStencilDesc.Usage = D3D11_USAGE_DEFAULT;
	depthStencilDesc.BindFlags = D3D11_BIND_DEPTH_STENCIL;
	depthStencilDesc.CPUAccessFlags = 0;
	depthStencilDesc.MiscFlags = 0;

	D3D11_DEPTH_STENCIL_VIEW_DESC _depthStencilViewDesc;
	ZeroMemory(&_depthStencilViewDesc, sizeof(D3D11_DEPTH_STENCIL_VIEW_DESC));
	_depthStencilViewDesc.Format = DXGI_FORMAT_D24_UNORM_S8_UINT;
	_depthStencilViewDesc.ViewDimension = D3D11_DSV_DIMENSION_TEXTURE2DMS;
	_depthStencilViewDesc.Texture2D.MipSlice = 0;

	//Create the Depth/Stencil View
	d3d11Device->CreateTexture2D(&depthStencilDesc, NULL, &depthStencilBuffer);
	d3d11Device->CreateDepthStencilView(depthStencilBuffer, &_depthStencilViewDesc, &depthStencilView);

Thanks for your reply

when i set Quality to 0 and sample counts to 8, it gives me blank screen.

I've checked my graphics card to see up to how many samples it can support

	for (UINT sampleCount = 1; sampleCount <= D3D11_MAX_MULTISAMPLE_SAMPLE_COUNT; sampleCount++)
	{
		UINT maxQuality;
		hr = d3d11Device->CheckMultisampleQualityLevels(
			DXGI_FORMAT_D24_UNORM_S8_UINT, sampleCount, &maxQuality);

		if (maxQuality > 0)
		{
			maxQuality--;
		}

		if (hr != S_OK)
		{
			return false;
		}
	}

and sampleCount goes until 33. does it mean that i can use 33 samples in my program ?

Hi,

Here are two different ways I set my quality, they may not be the best ways to do it:

 
UINT msaa_quality;
 
// method 1
 
msaa_quality = D3D11_STANDARD_MULTISAMPLE_PATTERN;
 
// method 2
 
DXGI_FORMAT format = DXGI_FORMAT_R8G8B8A8_UNORM; // or the format you're using
UINT msaa_samples = 4; // or 2, 8, etc.
 
hResult = d3d_device->CheckMultisampleQualityLevels(DXGI_FORMAT_R8G8B8A8_UNORM, msaa_samples, &msaa_quality);
msaa_quality--;