dx11 shader部分笔记

dx11 04shader渲染

1. intialize

• D3DX11CompileFromFile

  (vsFilename,NULL,NULL,"ColorVertexShader","vs_5_0",D3D10_SHADER_ENABLE_STRICTNESS,0,NULL,
  &vertexShaderBuffer,&errorMessage,NULL);

  
  
  
• D3DX11CompileFromFile

  (psFilename,NULL,NULL,"ColorPixelShader","ps_5_0",
  D3D10_SHADER_ENABLE_STRICTNESS,0,NULL,&pixelShaderBuffer,&errorMessage,NULL);

• CreateVertexShader

  (vertexShaderBuffer->GetBufferPointer(),vertexShaderBuffer->GetBufferSize(),
  NULL,&m_vertexShader);

• CreatePixelShader

  (pixelShaderBuffer->GetBufferPointer(),pixelShaderBuffer->GetBufferSize(),
  NULL,&m_pixelShader);

• set up D3D11_INPUT_ELEMENT_DESC
• CreateInputLayout

  (&polygonLayout[0],numElements,vertexShaderBuffer->GetBufferPointer(),
  vertexShaderBuffer->GetBufferSize(),&m_layout);

• vertexShaderBuffer->Release();pixelShaderBuffer->Release();
• set up D3D11_BUFFER_DESC
• CreateBuffer(&matrixBufferDesc,NULL,&m_matrixBuffer);

2.Shutdown

• m_matrixBuffer 
• m_layout
• m_pixelShader
• m_vertexShader

 

 3.Render

• SetShaderParameters

 (ID3D11DeviceContext* deviceContext, D3DXMATRIX worldMatrix,
 D3DXMATRIX viewMatrix, D3DXMATRIX projectionMatrix)　　

• • D3DXMatrixTranspose(&worldMatrix, &worldMatrix);

     D3DXMatrixTranspose(&viewMatrix, &viewMatrix);

    D3DXMatrixTranspose(&projectionMatrix, &projectionMatrix);

    巨坑 dx11要求必须转置

  • deviceContext->Map(m_matrixBuffer, 0, D3D11_MAP_WRITE_DISCARD, 0, &mappedResource);//Lock the constant buffer so it can be written by gpu
  • 用(MatrixBufferType*)mappedResource.pData设置
  •  deviceContext->Unmap(m_matrixBuffer, 0);
  • deviceContext->VSSetConstantBuffers(bufferNumber, 1, &m_matrixBuffer);更新常量缓存
• RenderShader
  • deviceContext->IASetInputLayout绑定布局
  •   deviceContext->VSSetShader(m_vertexShader, NULL, 0); 
        deviceContext->PSSetShader(m_pixelShader, NULL, 0);    
  •  deviceContext->DrawIndexed(indexCount, 0, 0);