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D3DReflect does not detect constant buffers

2 posts in this topic

Hey there,

So i am trying to get the number of constant buffers from my compiled shaders through reflection. Sadly it is not working as expected and i don't know why. Here is how i load the shader code inside a ID3DBlob:

ID3DBlob* vertexBlob;
HRESULT result = D3DReadFileToBlob(vertexShader.c_str(), &vertexBlob);

And this is how i get the reflection:

ComPtr<ID3D11ShaderReflection> reflection;
HRESULT hr = D3DReflect(shader.code->GetBufferPointer(), shader.code->GetBufferSize(), IID_ID3D11ShaderReflection, reinterpret_cast<void**>(reflection.GetAddressOf()));

if (FAILED(hr)) {
return (nullptr);

D3D11_SHADER_DESC shaderDesc;

If i check the shaderDesc in Debug the ConstantBuffers variable is 0. I already made sure that changes made to the Shader are getting recognized. I added another input variable and the number of input parameters inside the description increased. Finally here is how i define the constant buffer, but i don't think that this is the problem:

cbuffer perObject 
matrix worldViewProj;

struct vertexInput
float3 position : POSITION;
float3 color : COLOR;

float4 main(vertexInput input) : SV_POSITION
return float4(input.position, 1.0f);

Has anyone any ideas what might be wrong?-
Thank you in advance.




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Since that shader doesn't use anything from that buffer, the compiler won't assign a slot. So yeah, your vertex shader does in fact have no constant buffers.


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