- From: Pierre-Anthony Lemieux via GitHub <sysbot+gh@w3.org>
- Date: Wed, 17 May 2017 22:23:53 +0000
- To: public-tt@w3.org
palemieux has just submitted a new pull request for https://github.com/w3c/ttml2: == Initial pass at rationalizing aspect ratio and pixel dimensions == This is an initial pass at rationalizing computation of aspect ratio and pixel dimensions. Some highlights: - IMHO the ultimate goal is to determine (a) the intended display aspect ratio of the root container, i.e. what the viewer sees, and (b) the meaning of `px` within the document coordinate system - the mapping of the root container to the `presentation viewport` is left to profiles and/or applications, but can use the computed PAR, SAR, and DAR. - the document coordinate system is specified as an abstract Cartesian coordinate system, i.e. independently of the notion of pixels. I expect additional editorial will be needed, at the very least, but wanted to get the review started. See https://github.com/w3c/ttml2/pull/321
Received on Wednesday, 17 May 2017 22:24:00 UTC