8
好吧，所以我一直試圖讓Alpha混合在我的3D應用程序中工作，但它只是不想發生。我在渲染循環的最後繪製了具有正交投影的2D圖像（深度測試保持啓用狀態），圖像紋理具有透明部分，但是它們呈現黑色。 這裏是我的代碼混合：DirectX 11 Alpha混合不工作
D3D11_BLEND_DESC blendStateDesc;
ZeroMemory(&blendStateDesc, sizeof(D3D11_BLEND_DESC));
blendStateDesc.AlphaToCoverageEnable = FALSE;
blendStateDesc.IndependentBlendEnable = FALSE;
blendStateDesc.RenderTarget[0].BlendEnable = TRUE;
blendStateDesc.RenderTarget[0].SrcBlend = D3D11_BLEND_SRC_ALPHA;
blendStateDesc.RenderTarget[0].DestBlend = D3D11_BLEND_INV_SRC_ALPHA;
blendStateDesc.RenderTarget[0].BlendOp = D3D11_BLEND_OP_ADD;
blendStateDesc.RenderTarget[0].SrcBlendAlpha = D3D11_BLEND_SRC_ALPHA;
blendStateDesc.RenderTarget[0].DestBlendAlpha = D3D11_BLEND_DEST_ALPHA;
blendStateDesc.RenderTarget[0].BlendOpAlpha = D3D11_BLEND_OP_ADD;
blendStateDesc.RenderTarget[0].RenderTargetWriteMask = D3D11_COLOR_WRITE_ENABLE_ALL;
if (FAILED(device->CreateBlendState(&blendStateDesc, &blendState))) {
printf("Failed To Create Blend State\n");
}
deviceContext->OMSetBlendState(blendState, NULL, 0xFFFFFF);
如果它幫助這裏的紋理描述：
D3D11_TEXTURE2D_DESC texDesc;
texDesc.Width = TextureWidth;
texDesc.Height = textureHeight;
texDesc.MipLevels = 1;
texDesc.ArraySize = 1;
texDesc.Format = DXGI_FORMAT_B8G8R8A8_UNORM;
texDesc.SampleDesc.Count = 1;
texDesc.SampleDesc.Quality = 0;
texDesc.Usage = D3D11_USAGE_IMMUTABLE;
texDesc.BindFlags = D3D11_BIND_SHADER_RESOURCE;
texDesc.CPUAccessFlags = 0;
texDesc.MiscFlags = 0;
我只使用一個單一的渲染目標，而不是預先乘以着色器內的Alpha。我到處尋找並嘗試D3D11_BLEND_STATE的所有不同組合，但沒有任何工作。 最接近的我可以得到的是，當我將AlphaToCoverage設置爲TRUE，但如果我更改頂點的alpha，它不起作用，我知道我在做什麼AlphaToCoverage應該是FALSE。