NIS Sharpening is broken on DirectX 11

[doodlum]

Since updating Streamline to the latest version, the NIS plugin does not work correctly. Sometimes it works, sometimes it doesn't.

No errors will be reported by NIS. slEvaluateFeature will return sl::Result::eOk but no sharpening is applied.

Calling

		sl::NISOptions nisOptions{};
		nisOptions.mode = sl::NISMode::eSharpen;
		nisOptions.hdrMode = sl::NISHDR::eNone;
		nisOptions.sharpness = a_sharpness;

		if (SL_FAILED(result, slNISSetOptions(viewport, nisOptions))) {
			logger::critical("[Streamline] Could not set NIS options");
		}

Returns no errors either.

Probably unrelated to this bug report but the latest Streamline might have major performance issues as well, based on reports from many users of reduced performance since updating.

[jake-nv]

I’ve used it recently with dx12 (and maybe Vk), and NIS SDK shipped with dx11 support (https://github.com/NVIDIAGameWorks/NVIDIAImageScaling). If this is broken it’s likely a regression.

[doodlum]

I think regression because the only changes I made were related to updating Streamline from 2.0.1 to latest. It would only seem to initialise for me if DLSS was enabled on startup then when disabled NIS would work.