XCEngine/tests/RHI/D3D12/unit/test_root_signature.cpp

#include "fixtures/D3D12TestFixture.h"

TEST_F(D3D12TestFixture, RootSignature_Create_EmptyRootSignature) {
    D3D12_ROOT_SIGNATURE_DESC rootSigDesc = {};
    rootSigDesc.NumParameters = 0;
    rootSigDesc.NumStaticSamplers = 0;
    rootSigDesc.Flags = D3D12_ROOT_SIGNATURE_FLAG_NONE;
    
    ComPtr<ID3DBlob> blob;
    ComPtr<ID3DBlob> errorBlob;
    HRESULT hr = D3D12SerializeRootSignature(&rootSigDesc, D3D_ROOT_SIGNATURE_VERSION_1, &blob, &errorBlob);
    ASSERT_HRESULT_SUCCEEDED(hr);
    ASSERT_NE(blob.Get(), nullptr);
}

TEST_F(D3D12TestFixture, RootSignature_Create_WithCBV) {
    D3D12_ROOT_PARAMETER param = {};
    param.ParameterType = D3D12_ROOT_PARAMETER_TYPE_CBV;
    param.Descriptor.ShaderRegister = 0;
    param.Descriptor.RegisterSpace = 0;
    param.ShaderVisibility = D3D12_SHADER_VISIBILITY_ALL;
    
    D3D12_ROOT_SIGNATURE_DESC rootSigDesc = {};
    rootSigDesc.NumParameters = 1;
    rootSigDesc.pParameters = &param;
    rootSigDesc.NumStaticSamplers = 0;
    rootSigDesc.Flags = D3D12_ROOT_SIGNATURE_FLAG_NONE;
    
    ComPtr<ID3DBlob> blob;
    ComPtr<ID3DBlob> errorBlob;
    HRESULT hr = D3D12SerializeRootSignature(&rootSigDesc, D3D_ROOT_SIGNATURE_VERSION_1, &blob, &errorBlob);
    ASSERT_HRESULT_SUCCEEDED(hr);
    
    ComPtr<ID3D12RootSignature> rootSig;
    hr = GetDevice()->CreateRootSignature(0, blob->GetBufferPointer(), blob->GetBufferSize(), IID_PPV_ARGS(&rootSig));
    ASSERT_HRESULT_SUCCEEDED(hr);
    ASSERT_NE(rootSig.Get(), nullptr);
}