HAL::SetRenderTarget

virtual bool SetRenderTarget(RenderTarget* target, bool setState = true);

SetRenderTarget applies the primary output render target. This should be called before BeginDisplay, to have contents appear within the target. 

If not called before InitHAL, the HAL will attempt to create a default RenderTarget by querying the graphics API (when the platform allows this). When calling before InitHAL, ensure setState = false. 

Use setState = false if this render target is already set on the GPU (by the application) to avoid unnecessary render target changes. The bottom level render target cannot be set if it is already in display.

Returns true if the render target was created successfully; false otherwise.