Direct X 11叠加层-文本渲染问题

Question

我有一个正在进行的项目，该项目利用DirectX 11在外部窗口上覆盖文本（不注入任何内容或使用任何类型的内部API挂钩）。我正在创建一个透明窗口，并使用FW1FontWrapper处理实际的文本绘图。我遇到的问题是文本上有伪影，并且看起来失真，具体取决于我绘制的窗口的当前颜色。窗口为浅色时，将导致文本基本上不可读，而在深色背景/窗口上绘制将使其看起来大部分正常。

有关我在说什么的示例，请参见以下两个图像（分别在深色和浅色窗口上显示文字）：

我的猜测是问题出在Direct X初始化代码中。要么混合，要么混合跨文本和基础窗口的Alpha通道。我的直接X实现在初始化期间使用以下代码：

D3D_FEATURE_LEVEL featureLevel = D3D_FEATURE_LEVEL_11_0;

DXGI_SWAP_CHAIN_DESC scd;

// clear out the struct for use
ZeroMemory(&scd, sizeof(DXGI_SWAP_CHAIN_DESC));

// fill the swap chain description struct
scd.BufferCount = 1;                                    // one back buffer
scd.BufferDesc.Format = DXGI_FORMAT_R8G8B8A8_UNORM;     // use 32-bit color
scd.BufferDesc.Width = ScreenWidth;                     // set the back buffer width
scd.BufferDesc.Height = ScreenHeight;                   // set the back buffer height
scd.BufferUsage = DXGI_USAGE_RENDER_TARGET_OUTPUT;      // how swap chain is to be used
scd.OutputWindow = handleWindow;                        // the window to be used
scd.SampleDesc.Count = 1;                               // how many multisamples
scd.Windowed = TRUE;    
scd.BufferDesc.ScanlineOrdering = DXGI_MODE_SCANLINE_ORDER_UNSPECIFIED;
scd.BufferDesc.Scaling = DXGI_MODE_SCALING_UNSPECIFIED;
scd.SwapEffect = DXGI_SWAP_EFFECT_DISCARD;
scd.Flags = DXGI_SWAP_CHAIN_FLAG_ALLOW_MODE_SWITCH;     // allow full-screen switching  

D3D_FEATURE_LEVEL  FeatureLevelsSupported;

// create a device, device context and swap chain using the information in the scd struct
D3D11CreateDeviceAndSwapChain(NULL,
    D3D_DRIVER_TYPE_HARDWARE,
    NULL,
    0,
    &featureLevel,
    1,
    D3D11_SDK_VERSION,
    &scd,
    &m_pSwapchain,
    &m_pDevice,
    &FeatureLevelsSupported,
    &m_pContext);


// get the address of the back buffer
ID3D11Texture2D *pBackBuffer;
m_pSwapchain->GetBuffer(0, __uuidof(ID3D11Texture2D), (LPVOID*)&pBackBuffer);

// use the back buffer address to create the render target
m_pDevice->CreateRenderTargetView(pBackBuffer, NULL, &m_pBackBuffer);
pBackBuffer->Release();

// set the render target as the back buffer
m_pContext->OMSetRenderTargets(1, &m_pBackBuffer, NULL);

// Set the viewport
D3D11_VIEWPORT viewport;
ZeroMemory(&viewport, sizeof(D3D11_VIEWPORT));

viewport.MinDepth = 0;
viewport.MaxDepth = 1;
viewport.TopLeftX = 0;
viewport.TopLeftY = 0;
viewport.Width = ScreenWidth;
viewport.Height = ScreenHeight;

m_pContext->RSSetViewports(1, &viewport);

FW1FontWrapper使用所有默认参数初始化。

我希望在这方面有更多经验的人会注意到这里出了什么问题，或者至少可以指出正确的方向。我花了无尽的时间试图找到解决方案。如果可以使事情更清楚，我将提供任何其他信息或代码。