Do something with vertex-pixel shader linkage on DX11

[quyse]

Because of DirectX11's crazy linkage system we need to list all vertex shader's interpolates in pixel shader. Otherwise we will get Direct3D error about invalid linkage because output variables from vertex shader and input variables from pixel shader are set to different "hardware" registers. Maybe it is possible to workaround this automatically rather than manually, or invent some new abstraction like shader-stage interface.

[quyse]

Also it can silently make use of wrong interpolant, for example if you skip the first variable and use the second and types are the same.