Windows/DirectX: fix overexposed HDR stream with pixel shader

[awawa-dev]

Some time ago, one of the Windows updates introduced a change in the image capture result when the OS HDR feature is activated. The result is an overexposed captured image with too much brightness. It is not related to internal HyperHDR tone mapping, the screen comes in as it is. But we can do it better: Use pixel shaders to correct this problem directly on the GPU using its acceleration.

Screenshots illustrating the described problem reported by the users (#515).
Windows desktop with system HDR OFF

Windows desktop with system HDR ON

The inspiration for the package of new changes for HyperHDR (#688 #690) is the new Intel N100 SBC platform and the extensive capabilities of Windows 10/11, which enable hardware-accelerated capture of even the HDR signal. You should still remember about the capturing limitations related to HDCP, e.g. when Netflix app is used, but since the video player requires its use and the user has consciously agreed to its terms then it is not our concern. For HDCP workaround you still need a proper HDMI splitter and USB grabber.