DirectX 11：文本輸出：HLSL/InputLayout麻煩

我一直在尋找一個好的文本方法最近，發現一個在http://www.braynzarsoft.net/Articles/index.php?p=VA&article=Easy-Font-Rendering-in-DirectX-11，這是一個很好的網站。我似乎無法讓它運行！我已經解決大部分的錯誤，但是，但是在調試，我得到HLSL錯誤：DirectX 11：文本輸出：HLSL/InputLayout麻煩

D3D11: ERROR: ID3D11DeviceContext::Draw: The Vertex Shader expects application provided input data (which is to say data other than hardware auto-generated values such as VertexID or InstanceID). Therefore an Input Assembler object is expected, but none is bound. [ EXECUTION ERROR #349: DEVICE_DRAW_INPUTLAYOUT_NOT_SET ]

穆斯特？我是！由於此消息是垃圾郵件像瘋了一樣，這個問題是最有可能在我的DrawText()功能或初始化功能（如下圖），一個壞的執行發生

的InitializeGeneralResources()功能：

void InfiniteText::InitializeGeneralResources(){ 
float textureWidth=1024.0f; 
UINT numLetters=32; 

D3DX11CompileFromFile(L"Font.hlsl", NULL, NULL, "FONT_VS", "vs_5_0",0,0,0,&FontvsBuffer,0,0); 
D3DX11CompileFromFile(L"Font.hlsl", NULL, NULL, "FONT_PS", "ps_5_0",0,0,0,&FontpsBuffer,&ppErrorMsgs,0); 
iD3D.Device->CreateVertexShader(FontvsBuffer->GetBufferPointer(),FontvsBuffer->GetBufferSize(), NULL, &Fontvs); 
iD3D.Device->CreatePixelShader(FontpsBuffer->GetBufferPointer(),FontpsBuffer->GetBufferSize(), NULL, &Fontps); 

ID3D11InputLayout* InLayout; 
D3D11_INPUT_ELEMENT_DESC IEDesc[]={ 
      {"POSITION",0,DXGI_FORMAT_R32G32B32_FLOAT,0,0,D3D11_INPUT_PER_VERTEX_DATA,0}, 
      {"TEXCOORD",0,DXGI_FORMAT_R32G32_FLOAT,0,12,D3D11_INPUT_PER_VERTEX_DATA,0}, 
     }; 

UINT NumElements = ARRAYSIZE(IEDesc); 
iD3D.Device->CreateInputLayout(IEDesc,NumElements,FontvsBuffer->GetBufferPointer(),FontvsBuffer->GetBufferSize(),&InLayout); 
iD3D.DeviceContext->IASetInputLayout(InLayout); 

D3D11_SAMPLER_DESC FontSamplerDesc; 
FontSamplerDesc.MaxAnisotropy=1; 
FontSamplerDesc.AddressU=D3D11_TEXTURE_ADDRESS_WRAP; 
FontSamplerDesc.AddressV=D3D11_TEXTURE_ADDRESS_WRAP; 
FontSamplerDesc.AddressW=D3D11_TEXTURE_ADDRESS_WRAP; 
FontSamplerDesc.Filter=D3D11_FILTER_MIN_MAG_MIP_LINEAR; 
FontSamplerDesc.MipLODBias=0.0f; 

D3DX11CreateShaderResourceViewFromFile(iD3D.Device, L"Font.dds", NULL, NULL, &FontSRV, NULL); 
iD3D.Device->CreateSamplerState(&FontSamplerDesc, &FontSRVSampler); 

D3D11_BUFFER_DESC Vbufferdescription; 
ZeroMemory(&Vbufferdescription, sizeof(Vbufferdescription)); 

Vbufferdescription.BindFlags=D3D11_BIND_VERTEX_BUFFER; 
Vbufferdescription.Usage=D3D11_USAGE_DYNAMIC; 
Vbufferdescription.CPUAccessFlags=D3D11_CPU_ACCESS_WRITE; 
Vbufferdescription.ByteWidth=sizeof(VertexText)*6*numLetters; 
Vbufferdescription.MiscFlags=0; 

iD3D.Device->CreateBuffer(&Vbufferdescription, NULL, &FontVertexBuffer); 
}

我有一個相當簡單的HLSL文件：

cbuffer ConstantBuffer:register(b0) 
{ 
float4x4 WVP; 

} 

struct VOut 
{ 
float4 position : SV_POSITION; 
float2 TexCoord : TEXCOORD0; 
}; 

VOut FONT_VS(float4 position : POSITION, float2 TexCoord : TEXCOORD) 
{ 
    VOut output; 

output.position = mul(position, WVP); 
output.TexCoord = TexCoord; 

return output; 
} 


float2 FONT_PS(float4 position : SV_POSITION, float2 TexCoord : TEXCOORD0) : SV_TARGET 
{ 
return TexCoord; 
}

（該DrawString()功能）

bool InfiniteText::DrawString(char* Text, float xPos, float yPos){ 
int letterSize = sizeof(VertexText)*6; 
int textSize = strlen(Text); 

if(textSize > numLetters) 
    textSize=numLetters; 

float cScreenWidth = 32.0f/iD3D.cWidth; 
float cScreenHeight= 32.0f/iD3D.cHeight; 

float TexelWidth= 32.0f/textureWidth; 

D3D11_MAPPED_SUBRESOURCE MappedSub; 
iD3D.DeviceContext->Map(FontVertexBuffer, 0, D3D11_MAP_WRITE_DISCARD, 0, &MappedSub); 
VertexText* Sprite = (VertexText*)MappedSub.pData; 

const int indexA = static_cast<int>('A'); 
const int indexZ = static_cast<int>('Z'); 

for(int i=0; i<textSize;i++){ 
    float thisStartX=xPos+(cScreenWidth*static_cast<char>(i)); 
    float thisEndX=thisStartX + cScreenWidth; 
    float thisStartY=yPos; 
    float thisEndY=thisStartY + cScreenHeight; 

    Sprite[0].Translation=XMFLOAT3(thisEndX,thisEndY,1.0f); 
    Sprite[1].Translation=XMFLOAT3(thisEndX,yPos,1.0f); 
    Sprite[2].Translation=XMFLOAT3(thisStartX,yPos,1.0f); 
    Sprite[3].Translation=XMFLOAT3(thisStartX,yPos,1.0f); 
    Sprite[4].Translation=XMFLOAT3(thisStartX,thisEndY,1.0f); 
    Sprite[5].Translation=XMFLOAT3(thisEndX,thisEndY,1.0f); 

    UINT TexLookup=0; 
    UINT Letter= static_cast<int>(Text[i]); 

    if (Letter < indexA || Letter > indexZ){ 
     TexLookup=(indexA - indexZ) +1; 
    } 
    else{ 
     TexLookup=(Letter-indexA); 
    } 

    float texStart = 0.0f + (TexelWidth*static_cast<float>(TexLookup)); 
    float TexEnd = texStart + TexelWidth; 

    Sprite[0].TextureCoord = XMFLOAT2(TexEnd,0.0f); 
    Sprite[1].TextureCoord = XMFLOAT2(TexEnd,1.0f); 
    Sprite[2].TextureCoord = XMFLOAT2(texStart,1.0f); 
    Sprite[3].TextureCoord = XMFLOAT2(texStart,1.0f); 
    Sprite[4].TextureCoord = XMFLOAT2(texStart,0.0f); 
    Sprite[5].TextureCoord = XMFLOAT2(TexEnd,0.0f); 

    Sprite= Sprite + 6; 
} 
    iD3D.DeviceContext->Unmap(FontVertexBuffer,0); //MAP END 

    UINT stride=sizeof(VertexText); 
    UINT offset=0; 
    iD3D.DeviceContext->VSSetShader(iText.Fontvs,0,0); 
    iD3D.DeviceContext->PSSetShader(iText.Fontps,0,0); 

    //Projection=XMMatrixPerspectiveFovLH(XM_PIDIV2, 1.0, 0.0f, 1000.0f); 
    Projection=iD3D.mProjection; 
    iD3D.WorldCB.mWorldVP=XMMatrixTranspose(Projection); 

    iD3D.DeviceContext->UpdateSubresource(iD3D.MatrixBuffer, 0, NULL, &iD3D.WorldCB, 0, 0); 
    iD3D.DeviceContext->VSSetConstantBuffers(0,1,&iD3D.MatrixBuffer); 

    iD3D.DeviceContext->IASetVertexBuffers(0,1, &iText.FontVertexBuffer, &stride, &offset); 
    iD3D.DeviceContext->PSSetShaderResources(0,1, &iText.FontSRV); 
    iD3D.DeviceContext->PSSetSamplers(0,1,&iText.FontSRVSampler); 
    iD3D.DeviceContext->IASetPrimitiveTopology(D3D_PRIMITIVE_TOPOLOGY_TRIANGLELIST); 
    iD3D.DeviceContext->Draw(6*textSize,0); 

    return true; 


}

如果你做到了這一點，謝謝。我認爲這可能是因爲我的.hlsl文件可能沒有正確配置以接收紋理，我可能需要知道紋理如何與着色器進行適當的交互以生成輸出。謝謝！

來源

2014-03-04 Rashid Ellis