如何设置Direct2D 的BlendState?

Question

我在用图形调试的时候发现Direct2D渲染中BlendState始终为

我尝试过在D3D11DeviceContext中设置BlendState，但并不管用

我如何能自己设置BlendState?

Answer 1

您好，
你可以参考这个相似线程的答案
Direct3D11 中的所有资源都是不可变的，因此当您创建新的 Blendstate(mDevice, new BlendStateDescription()) 时，您以后无法更改描述。

var blendDescription = new BlendDescription();
blendDescription.RenderTarget[0].IsBlendEnabled = .. // 设置所有值
[...]
var blendState = new BlendState(device, blendDescription);
context.OutputMerger.SetBlendState(blendState, ...);

Best Regards,
Minxin Yu

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Answer 2

我并不是想改变现有的BlendState，而是想设置新的BlendState. 但是Direct2D中没有D3D11里面的OMSetBlendState接口。

Answer 3

费了老大劲，终于搞定了。只能Hook CreateBlendState，虽然麻烦但还可行