- From: Jon Sneyers via GitHub <sysbot+gh@w3.org>
- Date: Thu, 29 Oct 2020 15:58:35 +0000
- To: public-css-archive@w3.org
In the JPEG XL file format, you can put the Exif data where you want, but for web use cases, we define an abbreviated 'file format' that is just a 'naked' JPEG XL codestream without any metadata. All render-impacting metadata is defined in the JXL codestream, and if the optional Exif (or XMP) metadata says something that conflicts with what the codestream says, then a decoder has to ignore the Exif/XMP. The codestream is the single source of truth. This includes image dimensions, bit depth, number of channels, image orientation, intrinsic dimensions, and color space. In the codestream these things are part of the header, and are always put before the actual image data in the bitstream. Otherwise you cannot do meaningful progressive decoding. -- GitHub Notification of comment by jonsneyers Please view or discuss this issue at https://github.com/w3c/csswg-drafts/issues/4929#issuecomment-718849793 using your GitHub account -- Sent via github-notify-ml as configured in https://github.com/w3c/github-notify-ml-config
Received on Thursday, 29 October 2020 15:58:38 UTC