Re: [w3ctag/design-reviews] Custom Paint API to CR (#140)

> w3c/css-houdini-drafts#361 was filed to add an example with ES5 class syntax, but it's so far had negative reaction from @domenic

Fixed.

> the issue of paintWorklet being on Window is covered by w3c/css-houdini-drafts#350 (and w3c/css-houdini-drafts#330) but hasn't yet been edited into the spec

Fixed & Fixed.

> I wonder if the spec should actually mention border-image-outset in a comment somewhere (as was mentioned in w3ctag#140 (comment)) given that it seems likely to be a common question, although it's not an entirely satisfactory answer given the 9-slice mess you'd have to go through

I just pushed an additional example using border-image to the spec.
https://drafts.css-houdini.org/css-paint-api/#example-5

It's not *that* bad, but would be nice to have a property as simple as background-image to do this. Might be worth exploring a background-image-outset property within css to do this.

I expect we'll also have folks wanting a foreground-image in the future as well.

> w3c/css-houdini-drafts#339 is not yet resolved

Fixed.

> not sure if more discussion is needed on stability of canvas and its references

Not sure either.

> there doesn't seem to be an issue open covering the comments about filters in w3ctag#140 (comment)

Marked https://github.com/w3c/css-houdini-drafts/issues/398 as level 2. As a more meta-comment I think we are lacking a JS representation of filters used in various areas of the platform, as for any sufficiently complex filter, you need to fallback to svg, e.g.

```js
ctx.filter = 'svg(#ref)';

// instead of
ctx.filter = CSS.filterSet([
                         CSS.blur(2, 'px'),
                          CSS.halfTone(...)]);

// note above is a terrible api, but you get the idea.
```

> conic gradient example still isn't edited in

The "arcs" example replaces this now.
https://drafts.css-houdini.org/css-paint-api/#example-3

> I don't see an open issue representing the future work on CSSFontFaceValue mentioned in w3ctag#140 (comment)

I've marked https://github.com/w3c/css-houdini-drafts/issues/399 as level 2. I think we need the typedOM to settle down a bit, before tackling this.

> w3c/css-houdini-drafts#362 is still open

Closed. 

> w3c/css-houdini-drafts#326 is still open

Closed.

> w3c/css-houdini-drafts#327 is still open

Closed.

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