[Webkit-unassigned] [Bug 210021] EXIF orientation info in PNGs isn't used for image-orientation: from-image

bugzilla-daemon at webkit.org bugzilla-daemon at webkit.org
Mon Apr 6 14:31:51 PDT 2020


https://bugs.webkit.org/show_bug.cgi?id=210021

--- Comment #4 from Eric Portis <e at ericportis.com> ---
@smfr Interesting!

Here's a new test page: https://ericportis.com/etc/PNG-EXIF-orientation/shuffling-chunks/

Looks like (on MacOS 10.15):

Finder, Preview, and Safari respect eXIf-before-IDAT.

Chrome and Firefox do not respect eXIf-before-IDAT.

I'm not sure how any browser can support both eXIF-*after*-IDAT and also progressively render partially-downloaded, progressively-encoded PNGs. In some initial testing both Firefox and Chrome will paint partially-downloaded PNGs, but Safari does not.

Does a note about PNG chunk order and/or progressive rendering belong in the spec?

-- 
You are receiving this mail because:
You are the assignee for the bug.
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.webkit.org/pipermail/webkit-unassigned/attachments/20200406/24ff232c/attachment-0001.htm>


More information about the webkit-unassigned mailing list