ABSTRACT
The implementation requires the developer only to replace the main device class IDirect3DDevice9 with the one supplied with this solution (TDxDevice).
4.2 Introduction DirectX 9 is implemented so that all functions are DLL function calls. As such they can not be in-lined and thus require some additional instruction to execute. Additionally, they internally tend to frequently synchronize with hardware and can suffer unpredicted time delays (specific to the application rendering pipeline,
DirectX release and device driver version). On the other hand, the DirectX design itself requires issuing multiple functions for rendering a single primitive (set render state, render target, source streams, vertex shader, pixel shader, textures, and, finally, render), even further worsening the situation. In the end, all this function calls and inherent synchronization constitutes in a significant overhead that our solution eliminates.
