CODEWITHSUNDEEP
directx
Blaxx
Blaxx

Reputation: 225

DirectX: Antialiasing doesn´t work

I just want to enable Antialiasing in DirectX9, but it doesn´t seem to do much, and the text drawn with ID3DXFont.DrawText(...) looks jagged too.

Here is the initialization-part

pDirect3D = Direct3DCreate9( D3D_SDK_VERSION);
memset(&presentParameters, 0, sizeof(_D3DPRESENT_PARAMETERS_));
presentParameters.BackBufferCount = 1;
presentParameters.BackBufferWidth = 800;
presentParameters.BackBufferHeight = 500;

presentParameters.MultiSampleType = D3DMULTISAMPLE_NONMASKABLE;
presentParameters.MultiSampleQuality = 2;

presentParameters.SwapEffect = D3DSWAPEFFECT_DISCARD;
presentParameters.hDeviceWindow = hWnd;
presentParameters.Flags = 0;
presentParameters.FullScreen_RefreshRateInHz = D3DPRESENT_RATE_DEFAULT;
presentParameters.PresentationInterval = D3DPRESENT_INTERVAL_DEFAULT;
presentParameters.BackBufferFormat = D3DFMT_R5G6B5;
presentParameters.EnableAutoDepthStencil = TRUE;
presentParameters.AutoDepthStencilFormat = D3DFMT_D16;
presentParameters.Windowed = TRUE;
pDirect3D->CreateDevice(D3DADAPTER_DEFAULT, D3DDEVTYPE_HAL, hWnd,D3DCREATE_SOFTWARE_VERTEXPROCESSING, &presentParameters, &pDevice);
pDevice->SetRenderState(D3DRS_CULLMODE, D3DCULL_NONE);

pDevice->SetRenderState(D3DRS_MULTISAMPLEANTIALIAS, TRUE);

Is there something I do wrong?

ShowWindow(hWnd, nCmdShow);
UpdateWindow(hWnd);

Upvotes: 1

Views: 3849

Answers (2)

Pierre
Pierre

Reputation: 4416

I am creating text with meshes (D3DXCreateTextW), and I notice a significant difference when MultiSampling, even at low quality levels. With any kind of MultiSampling, the text and other lines are smooth, whereas they are jagged without MultiSampling.

Use CheckDeviceMultiSampleType to confirm that your video card does accept the type and level that you are requesting.

Upvotes: 1

John Leidegren
John Leidegren

Reputation: 60987

First, text isn't anti-aliased by mutli-sampling, secondly a MultiSampleQuality of 2 is barely noticeable. Try a 4 or 8 ensure that the result is achieved, try toggling and watch the jagged edges.

You should checkout the AntiAlias sample provided in the DirectX SDK for details about setting this up properly.

Upvotes: 1

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