c++ - CreateInputLayout 返回 E_INVALIDARG

Question

我正在使用 DirectX11 用 C++ 编写程序。现在我想从着色器开始，为此我还需要 ID3D11InputLayout

//in main
shader.Bind(DeviceContext);

ID3D11InputLayout *pLayout;
D3D11_INPUT_ELEMENT_DESC ied[] =
{
    {"POSITION", 0, DXGI_FORMAT_R32G32B32_FLOAT, 0, 0, D3D11_INPUT_PER_VERTEX_DATA, 0},
    {"COLOR", 0, DXGI_FORMAT_R32G32B32A32_FLOAT, 0, 12, D3D11_INPUT_PER_VERTEX_DATA, 0},
};

HRESULT hh = Device->CreateInputLayout(ied, 2, shader.GetVSBlob()->GetBufferPointer(), shader.GetVSBlob()->GetBufferSize(), &pLayout);

DeviceContext->IASetInputLayout(pLayout);

//Vertex Shader
struct VOut
{
float4 position : SV_POSITION;
float4 color : COLOR;
};

VOut main(float4 position : POSITION, float4 color : COLOR)
{
VOut output;

output.position = position;
output.color = color;

return output;
}
//pixel shader
struct VOut
{
float4 position : SV_POSITION;
float4 color : COLOR;
};

float4 main(float4 position : SV_POSITION, float4 color : COLOR) : SV_TARGET
{
return color;
}

Device->CreateInputLayout() 返回 E_INVALIDARG。

Answer 1

启用 Direct3D Debug Device并查找调试输出。

D3D11 ERROR: ID3D11Device::CreateInputLayout: The provided input signature expects
to read an element with SemanticName/Index: 'SV_Position'/0, but the declaration
doesn't provide a matching name.
[ STATE_CREATION ERROR #163: CREATEINPUTLAYOUT_MISSINGELEMENT]

在这种情况下，您会看到您在布局中使用了遗留的“POSITION”语义，但在着色器中使用了“SV_Position”。它们需要保持一致。