A fix for HDR games in the DLSS and FSR Upscalers, and faster tests.
- HDR highlights keep their brightness in the upscalers. In 0.9.8 the upscalers took HDR frames, but bright highlights (a sun, a lamp,
a 1000-nit sky) came out at a fraction of their brightness, about 170 nits. HDR frames are upscaled in an SDR view that rolls
highlights off towards white, and that roll-off was so steep that DLSS's or FSR's smallest change near white undid a highlight.
It is now logarithmic: in the test a 1000-nit highlight comes back at about 950 nits with DLSS and 885 with FSR (it was 170).
Neural Rendering's HDR picture is unchanged: its change still fades out above the SDR white as before. - Tests: the Neural Rendering and upscaler scenarios run about four times faster (the full set in about 5 minutes, it was 20), and
everyday runs only the scenarios for the code that changed. A runtime switch in the DLSS Upscaler is tested with enough frames after
it (DLSS starts again cold in about two seconds).