Added HANGING, IDEOGRAPHIC and TOP textBaseline to adjustments

[semohr]

see #2343

• Have you updated CHANGELOG.md?

[chearon]

We do support textBaseline = "top". It's a no-op since the Pango layout is painted from the top-left.

The math for the existing alignments checks out. I can't explain why you got different results, as they look right when I try them (I used our own browser comparisons from npm run test-server to check). Does it still happen with different fonts? What OS did you try it on?

We can't do hanging or ideographic correctly because Pango doesn't expose that. I think it would be better to leave approximations up to the user for now.

[semohr]

As noted in the issue: #2343

I'm using
canvas@2.11.2 on Ubuntu 22.04.3 LTS (jammy)
node@v18.12.1
firefox@127.0.1
Arial font

Well as far as I can see the test might not be working correctly and the resolution is kinda low in these tests.
Please try the code snippet from the issue, the top alignment produces visible different results depending on if one uses the browser canvas implementation versus the node-canvas implementation.

[semohr]

Just to be sure I tried it again with the newest version (master branch f138b3a) as I submitted this quite some time ago. I picked another font and made sure to load exactly the same font files both in the browser and in the node implementation. The problem seems to persists.

I also tested it in chrome and on a different device. Same results.