- From: Chris Lilley via GitHub <sysbot+gh@w3.org>
- Date: Mon, 12 Feb 2024 03:21:01 +0000
- To: public-css-archive@w3.org
svgeesus has just created a new issue for https://github.com/w3c/csswg-drafts: == [css-color-hdr] Incomplete sample code for color conversions == Unlike CSS Color 4, which has [complete sample code to convert each predefined color space to and from CIE XYZ-D65](https://drafts.csswg.org/css-color-4/#color-conversion-code), CSS Color HDR currently lacks this. It currently documents: 1. Converting from absolute luminance, linear-light BT.2100 RGB to PQ, and back 2. Converting from absolute luminance, linear-light BT.2100 RGB to HLG, and back 3. Converting from rectangular Jzazbz to polar JzCzHz, and back It is possible to infer, from CSS Color 4, how to get from linear light, SDR BT.2020 but from there to absolute luminance HDR BT.2100 (which uses the same chromaticities and white point) is left as an exercise for the reader. Converting from XYZ-D65 to Jzazbz (and back) and to ICtCp (and back) requires reading the Sadfar paper and BT.2100 respectively. To aid implementers, the specification should provide full sample code to and from each predefined color space. Please view or discuss this issue at https://github.com/w3c/csswg-drafts/issues/9934 using your GitHub account -- Sent via github-notify-ml as configured in https://github.com/w3c/github-notify-ml-config
Received on Monday, 12 February 2024 03:21:04 UTC