I have created a Direct3D9 wrapper in Go which uses CGo to interface with
the COM objects in C. (https://github.com/gonutz/d3d9)
I would like to get rid of the dependency on a C-compiler under Windows so
the user would not have to install MinGW or Cygwin to use DirectX from Go.
The problem is that d3d9.dll does not expose C-functions but uses COM. The
only function that can be called directly after loading the DLL (with
syscall.LoadLibrary("d3d9.dll")) is Direct3DCreate9. This returns a COM
object which exposes all functionality as methods.
How can I call COM object methods in a DLL from pure Go without CGo?
I know of the Go-OLE library (https://github.com/go-ole/go-ole) which
states it calls COM interfaces without CGo but I cannot, from the sources,
see how I would go about doing the same thing for Direct3D9. A simple
example with only the relevant parts would be of great help.
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