Helper function to create and register in renderer custom multi-sample textures.
To function properly TextureClass should have method declared as
static TextureClass *Create(IReleasableListener*, NativeGraphicsClass*, IRenderer*) and this function should be made a friend of TextureClass.
The first argument should be set in TextureClass constructor as release listener. It is recommended that TextureClass be derived from IReleasable/CReleasable for this purpose.
The second argument will be the native graphics class used by renderer and thus should be named by NativeGraphicsClass.
If TextureClass::Create() fails it should return nullptr.
CreateTextureMultisample() function return nullptr if "renderer" argument is missing, or renderer's native graphics isn't an instance of NativeGraphicsClass, or TextureClass::Create() returns nullptr.
In case of using with custom renderers the function should be made a friend of that renderer in order to have access to its protected methods.
template<class TextureClass, class RendererClass, class NativeGraphicsClass> ITextureMultisample *CreateTextureMultisample(RendererClass *renderer);