Add ID2D1PixelShaderDescriptor<T>.EffectFactory
and remove runtime delegate marshalling
#907
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Description
The ComputeSharp.D2D1 infrastructure is currently relying on
Marshal.GetFunctionPointerForDelegate
to marshal a wrapper object for a givenT
in a non-generic way, such that the internalID2D1EffectImpl
object can call the methods on it. This works, but it's not efficient, and also means you cannot use ComputeSharp in heavily constrained/sandboxed environments, whereMarshal.GetFunctionPointerForDelegate
is not allowed (as it requires the runtime to allocate a thunk of executable memory at runtime). This PR addresses both problems having the generator emit a non-generic native factory instead.