CODEWITHSUNDEEP
directxdxgi
harut9
harut9

Reputation: 77

How to work with D3D11_FORMAT_SUPPORT

I want to apply PCF for my shadows and for that I need to set my shadow map texture format to DXGI_FORMAT_R24_UNORM_X8_TYPELESS. After setting I cannot run my program , it crashes without any errors. I think the reason is that my GPU dont suppotrs that format and for that I want to check for format support. See enter link description here

Here is my code 

UINT pSup;
result = device->CheckFormatSupport(DXGI_FORMAT_R24_UNORM_X8_TYPELESS,&pSup);
if (result != S_OK)
{
    MessageBox(NULL, L"Dont support that format", L"Error", MB_OK);
}

But How to work with pSup. I need to check if it supports D3D11_FORMAT_SUPPORT_SHADER_SAMPLE_COMPARISON , D3D11_FORMAT_SUPPORT_RENDER_TARGET and D3D11_FORMAT_SUPPORT_DEPTH_STENCIL. See also enter link description here

Upvotes: 1

Views: 547

Answers (1)

kaiser
kaiser

Reputation: 1009

I cannot believe this: "After setting I cannot run my program , it crashes without any errors"

Run in Debug mode and go step by step to check at which line the programm crashes.

device->CheckFormatSupport(DXGI_FORMAT_R24_UNORM_X8_TYPELESS,&pSup);

Windows says that the function ORs the values.

So you just need to AND the D3D11_FORMAT_SUPPORT you want. For Example checking if given format is supported for my depthstencil and RenderTargetView:

if(pSup & D3D11_FORMAT_SUPPORT_RENDER_TARGET)
{
    //render target supports that type
}
if(pSup & D3D11_FORMAT_SUPPORT_DEPTH_STENCIL)
{
   //depth stencil supports that type
}

Back to your Problem, i don't think that it's a support Problem of your hardware. You're talking about shadows and PCF. So i think you don't need the stencil bits. So do not use DXGI_FORMAT_R24_UNORM_X8_TYPELESS as format.

When rendering a shadow map you want as much precision as possible, so use:

  • DXGI_FORMAT_R32_TYPELESS for texture
  • DXGI_FORMAT_D32_FLOAT for depthstencil
  • DXGI_FORMAT_R32_FLOAT for ShaderResourceView

Good luck.

Upvotes: 2

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