Extended dynamic range (EDR) metadata for the Hybrid Log-Gamma (HLG) transfer function.
- macOS 10.15+
- Mac Catalyst 13.0+
- Core Animation
Your content should be scene referred and encoded with the ITU-R BT.2100-2 Hybrid Log Gamma (HLG) opto-electrical transfer function (OETF). The system applies the opto-optical transfer function (OOTF) based on peak display brightness and ambient lighting. If you're rendering to a
CAMetal with a linear colorspace (for floating point EDR layers), you must apply the HLG inverse OETF without normalization, to provide a nominal range of
For more information on HLG, see https://www.itu.int/rec/R-REC-BT.2100.