Loading a precompiled HLSL shader into memory for use with CreatePixelShader

c++ direct3d hlsl
Steve picture Steve · Feb 16, 2011 · Viewed 11k times · Source

I need to load a compiled pixel shader into memory to use with CreatePixelShader but I can't use any D3DX calls.

How can I do this?

(I'm using Visual Studio 2010 as my compiler and C++ as the language)

Answer

gundamb2 picture gundamb2 · May 25, 2012

I realize someone posted pseudo-code earlier. Here is C++ code using the Windows SDK (and not the D3DX libraries as requested).

Here "PixelShader.cso" is the precompiled hlsl shader generated by Visual Studio 11 from a .hlsl file in the project. The compiled .cso file is usually moved to the Projects/ProjectName/Debug folder by default. As a result it must be cut and paste into the same directory as your source code before using. Mind you this setting can be changed by right-clicking the HLSL file while inside Visual Studio 11 and editing the Output Settings. By default its: $(OutDir)%(Filename).cso, change it to: $(Directory)%(Filename).cso

ID3D11PixelShader* PS;
ID3DBlob* PS_Buffer;

D3DReadFileToBlob(L"PixelShader.cso", &PS_Buffer);
d3d11Device->CreatePixelShader(PS_Buffer->GetBufferPointer(), PS_Buffer->GetBufferSize(), NULL, &PS);
d3d11DevCon->PSSetShader(PS, 0, 0);

Take note of the L before "PixelShader.cso". My project was using the Multi-Byte Character Set, if you have yours set to Unicode the L might not be necessary.

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