1773791 - [css-images-5] Add support for CSS "object-view-box" property

Status: NEW

(Core :: Layout: Images, Video, and HTML Frames, enhancement)

Description

[Daniel Holbert [:dholbert]]

Filing this bug to cover implementation of the "object-view-box" CSS property.
https://drafts.csswg.org/css-images-4/#the-object-view-box

(mirror: https://andreubotella.com/csswg-auto-build/css-images-4/#the-object-view-box )

See also https://github.com/w3c/csswg-drafts/issues/7143 (and probably several other csswg-drafts issues) where this has been discussed, too.

Comment 1

[Thomas Wisniewski [:twisniewski]]

Supporting view-box would align us with Safari and Chrome by passing the two WPTs where we presently don't align for the css/css-transforms/transform-box tests (cssbox-initial.html and svgbox-initial.html), so it might be worth prioritizing over the other features which Chrome doesn't yet support on the same tests.

Comment 2

[Boris Chiou [:boris]]

(In reply to Thomas Wisniewski [:twisniewski] from comment #1)

Supporting view-box would align us with Safari and Chrome by passing the two WPTs where we presently don't align for the css/css-transforms/transform-box tests (cssbox-initial.html and svgbox-initial.html), so it might be worth prioritizing over the other features which Chrome doesn't yet support on the same tests.

I guess you were talking about Bug 1819464. This bug shouldn't be related to css transform.

Comment 3

[Thomas Wisniewski [:twisniewski]]

Indeed that seems to be the case. My mistake, thanks for checking!

Comment 4

[jsnkuhn]

This now part of css-images-5: https://drafts.csswg.org/css-images-5/

Comment 5

[Robert Longson [:longsonr]]

The object-view-box property specifies a "view box" over an element, which allows zooming or panning over the element’s contents. It maps to the <svg viewBox> attribute in SVG.

So if I use the SVG DOM to set viewBox values, does the CSS property change? That's how other mapped properties such as x, y, r, rx, ry, width and height work FWIW.