[css3-images] How does image-orientation interact with EXIF data? from Tab Atkins Jr. on 2012-02-17 (www-style@w3.org from February 2012) (original) (raw)

On Wed, Feb 15, 2012 at 4:34 PM, Simon Fraser <smfr@me.com> wrote:

I still don't think it's really clear. The spec says:

Sometimes images from camera phones, digital cameras or scanners are encoded sideways

and then in the Note:

Note that in CSS, orientation data encoded in the image (e.g. EXIF data) is ignored

The difference between "encoded sideways" and "orientation data encoded in the image" seems too subtle. Maybe the note should refer to metadata or even EXIF explicitly.

I don't know the history of image-orientation (the earliest reference on the list is http://lists.w3.org/Archives/Public/www-style/2004Jan/0249.html in 2004), but I still think that orientation issues related to EXIF are way more frequent than those due to encoding sideways. I question whether this property will be used often enough to warrant its inclusion.

Okay, how about now? In the intro I specifically refer to how data-based sideways orientations can arise, then immediately have a note about metadata-based orientations.

~TJ

Received on Friday, 17 February 2012 23:21:05 UTC