创建顶点缓冲区错误

Error creating vertex buffer

本文关键字：错误 缓冲区 顶点 创建      更新时间：2023-10-16

创建vertexbuffer时出现错误下面是我的代码:

bool ColorShaderClass::InitializeShader(ID3D11Device* device, HWND hwnd, WCHAR* vsFilename, WCHAR* psFilename)
{

HRESULT result;
    ID3D10Blob* errorMessage;
    ID3D10Blob* vertexShaderBuffer;
    ID3D10Blob* pixelShaderBuffer;
    D3D11_INPUT_ELEMENT_DESC polygonLayout[2];
    unsigned int numElements;
    D3D11_BUFFER_DESC matrixBufferDesc;

// Initialize the pointers this function will use to null.
errorMessage = 0;
vertexShaderBuffer = 0;
pixelShaderBuffer = 0;
// Compile the vertex shader code.
result = D3DX11CompileFromFile(vsFilename, NULL, NULL, "ColorVertexShader", "vs_5_0", D3D10_SHADER_ENABLE_STRICTNESS, 0, NULL, 
                               &vertexShaderBuffer, &errorMessage, NULL);
if(FAILED(result))
{
    // If the shader failed to compile it should have writen something to the error message.
    if(errorMessage)
    {
        OutputShaderErrorMessage(errorMessage, hwnd, vsFilename);
    }
    // If there was  nothing in the error message then it simply could not find the shader file itself.
    else
    {
        MessageBox(hwnd, vsFilename, L"Missing Shader File", MB_OK);
    }
    return false;
}
// Compile the pixel shader code.
result = D3DX11CompileFromFile(psFilename, NULL, NULL, "ColorPixelShader", "ps_5_0", D3D10_SHADER_ENABLE_STRICTNESS, 0, NULL, 
                               &pixelShaderBuffer, &errorMessage, NULL);
if(FAILED(result))
{
    // If the shader failed to compile it should have writen something to the error message.
    if(errorMessage)
    {
        OutputShaderErrorMessage(errorMessage, hwnd, psFilename);
    }
    // If there was nothing in the error message then it simply could not find the file itself.
    else
    {
        MessageBox(hwnd, psFilename, L"Missing Shader File", MB_OK);
    }
    return false;
}
// Create the vertex shader from the buffer.
result = device->CreateVertexShader(vertexShaderBuffer->GetBufferPointer(), vertexShaderBuffer->GetBufferSize(), NULL,
    &m_vertexShader);
if(FAILED(result))
{
    return false;
}
// Create the pixel shader from the buffer.
result = device->CreatePixelShader(pixelShaderBuffer->GetBufferPointer(), pixelShaderBuffer->GetBufferSize(), NULL,
    &m_pixelShader);
if(FAILED(result))
{
    return false;
}
// Create the vertex input layout description.
// This setup needs to match the VertexType stucture in the ModelClass and in the shader.
polygonLayout[0].SemanticName = "POSITION";
polygonLayout[0].SemanticIndex = 0;
polygonLayout[0].Format = DXGI_FORMAT_R32G32B32_FLOAT;
polygonLayout[0].InputSlot = 0;
polygonLayout[0].AlignedByteOffset = 0;
polygonLayout[0].InputSlotClass = D3D11_INPUT_PER_VERTEX_DATA;
polygonLayout[0].InstanceDataStepRate = 0;
polygonLayout[1].SemanticName = "COLOR";
polygonLayout[1].SemanticIndex = 0;
polygonLayout[1].Format = DXGI_FORMAT_R32G32B32A32_FLOAT;
polygonLayout[1].InputSlot = 0;
polygonLayout[1].AlignedByteOffset = D3D11_APPEND_ALIGNED_ELEMENT;
polygonLayout[1].InputSlotClass = D3D11_INPUT_PER_VERTEX_DATA;
polygonLayout[1].InstanceDataStepRate = 0;
// Get a count of the elements in the layout.
numElements = sizeof(polygonLayout) / sizeof(polygonLayout[0]);
// Create the vertex input layout.
result = device->CreateInputLayout(polygonLayout, numElements, vertexShaderBuffer->GetBufferPointer(), 
                                   vertexShaderBuffer->GetBufferSize(), &m_layout);
if(FAILED(result))
{
    return false;
}
// Release the vertex shader buffer and pixel shader buffer since they are no longer needed.
vertexShaderBuffer->Release();
vertexShaderBuffer = 0;
pixelShaderBuffer->Release();
pixelShaderBuffer = 0;
// Setup the description of the dynamic matrix constant buffer that is in the vertex shader.
matrixBufferDesc.Usage = D3D11_USAGE_DYNAMIC;
matrixBufferDesc.ByteWidth = sizeof(MatrixBufferType);
matrixBufferDesc.BindFlags = D3D11_BIND_CONSTANT_BUFFER;
matrixBufferDesc.CPUAccessFlags = D3D11_CPU_ACCESS_WRITE;
matrixBufferDesc.MiscFlags = 0;
matrixBufferDesc.StructureByteStride = 0;
// Create the constant buffer pointer so we can access the vertex shader constant buffer from within this class.
result = device->CreateBuffer(&matrixBufferDesc, NULL, &m_matrixBuffer);
if(FAILED(result))
{
    return false;
}
return true;
}

顺便说一句，我从教程http://www.rastertek.com/dx11tut04.html，你可以看到洞的代码在那里。我听说问题可能是我的显卡不支持DirectX 11。如果这是问题，我可以用软件顶点处理功能级别11之类的，这样就可以了。

如果你的卡不支持Direct3D 11功能，程序会在设备初始化失败，而不是着色器创建，所以如果你用D3D_FEATURE_LEVEL_11_0初始化你的设备，它成功了，这意味着你的问题在于着色器代码的某处。这是很有可能的，因为智能感知不能与HLSL一起工作。

幸运的是，你的框架有一些错误报告功能，所以你可以简单地查看shader_errors.txt文件，看看你的问题在哪里。

如果上述情况并非如此(即您已经更改了Direct3D功能级别)，那么您有几个选项:

  1. 改变你的着色器模型，以匹配Direct3D特征水平在D3DX11CompileFromFile()方法，例如，如果你使用D3D_FEATURE_LEVEL_10_0设置你的着色器模型为vs_4_0和ps_4_0。

  2. 如果你使用的是Windows 8(在不支持DX11的机器上不太可能)，那么你可以在设备初始化中使用D3D_DRIVER_TYPE_WARP，这是一个快速的软件光栅化器，但在旧版本的Windows上它不支持11_0功能级别。

  3. 作为最后的手段，你可以使用D3D_DRIVER_TYPE_REFERENCE，它支持所有Direct3D功能，但非常慢，到一个不可用的点

如果你运行的硬件不支持你想要的功能级别，有某种形式的后备选项总是一个好主意。例如:

D3D_FEATURE_LEVEL featureLevel = D3D_FEATURE_LEVEL_11_0;
HRESULT result = D3D11CreateDeviceAndSwapChain(NULL, D3D_DRIVER_TYPE_HARDWARE, NULL, D3D11_CREATE_DEVICE_DEBUG, &featureLevel, 1, D3D11_SDK_VERSION, &swapChainDesc, &m_swapChain, &m_device, NULL, &m_deviceContext);
if (FAILED(result))
{
    featureLevel = D3D_FEATURE_LEVEL_10_0;
    result = D3D11CreateDeviceAndSwapChain(NULL, D3D_DRIVER_TYPE_HARDWARE, NULL, D3D11_CREATE_DEVICE_DEBUG, &featureLevel, 1, D3D11_SDK_VERSION, &swapChainDesc, &m_swapChain, &m_device, NULL, &m_deviceContext);
    if (FAILED(result))
    {
        // OK, now quit, we need at least DirectX 10 compatible hardware
        return false;
    }
}
// In shader class
if (m_device->GetFeatureLevel() == D3D_FEATURE_LEVEL_11_0)
{
    // use 5.0 shader model
}
else
{
    // use 4.0 shader model
}
相关文章：