Sets vertex layout for the vertex shader.
[in] Handle of a vertex shader created in DXShaderCreate().
[in] Array of vertex fields description. The description is set by the DXVertexLayout structure:
The layout should match the type of vertices in a specified vertex buffer. It should also match the input type of vertices used at the entry point in the vertex shader code.
The vertex buffer for a shader is set in DXBufferSet().
The DXVertexLayout structure is a version of the D3D11_INPUT_ELEMENT_DESC MSDN structure.