Increasing pixels also increases texture sampling and the bandwidth of render target, which brings challenges to the performance of games. With the popularity of high-definition 4K screens, the resolution of game window also increases. On one hand, the resolution almost always has a significant impact on the performance of modern games. The major role of MPO is to allow a game to maintain a stable and appropriate frame rate under different circumstances, thereby improving the overall game experience. The stretching and composition of surfaces at different resolutions are automatically implemented by the system, and transparent to applications. MPO supports using the original resolution to display gorgeous 2D art and UI elements, while drawing 3D scenes into a smaller and stretchable frame buffer. Multiplane Overlays (MPO) is a new feature of WDDM1.3 (DX11.2) initially introduced in Windows 8.1, which is now extended to WDDM2.0 (DX12) in Windows 10. Chapter 3: Migrating From DirectX 11 to DirectX 12 4.1 Function and Usage of Multiplane Overlay 4.1.1 Introduction
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