Turn .png files into eye-searing HDR versions suitable for punishing your coworkers on Slack. Usage:
uv run hdrmoji.py embed troll.png troll-hdr.png superhdr.iccThese render well (or awfully, depending on your point of view) on recent Macbook Pros with XDR displays in Chrome and the Slack app; YMMV with other apps, monitors and operating system.
Use the existing extracted HDR ICC profile or ues extract to extract one from an image. The ICC from the original HDR Emojis appears to use Rec. ITU-R BT.2100 PQ or REC 2020 Gamut with PQ Transfer depending which metadata and viewer's info you believe. I have no idea if the LLM-hallucinated cHRM and gAMA values are optimal; someone with more knowledge of colorspaces and ICC profiles than me should feel free to improve it.
This is self-contained for single-command usage. Just uv run the script. (If you don't already have uv, get with the program).
Based on seeing swankjesse/hdr-emojis posted to a Slack I use, and a little reverse-engineering from the .png metadata. See that repo for ways to disable HDR in different browsers/apps if you hate it.