gtk4: Emoji rendering broken

[cal0pteryx]

Description / Steps to reproduce the issue

• install mingw-w64-gtk4 (current version: 4.16.7-1)
• start gtk4-demo.exe
• run any demo where it's possible to add emojis, e.g. with a GtkEntry, right click, insert emoji

https://gitlab.gnome.org/GNOME/gtk/-/issues/7144 has more info on this and it seems that for MSYS, some patches are applied which break emoji rendering on MSYS.

Expected behavior

Emojis should be rendered correctly

Actual behavior

Emojis are not rendered correctly:

Verification

• I have verified that my MSYS2 is up-to-date before submitting the report (see https://www.msys2.org/docs/updating/)

Windows Version

MSYS_NT-10.0-26100

Are you willing to submit a PR?

No response

[Biswa96]

gtk4 has been updated to 4.16.12 version. Does the issue still remain?

[lovetox]

i dont know why it should, the linked issue is open, and the pango mingw package still aplies a font patch https://github.com/msys2/MINGW-packages/blob/master/mingw-w64-pango/0001-disable-dwrite.patch which seems to cause that issue.

[lovetox]

@lazka you were involved when the dwrite patch was added.

It seems the dwrite disable patch was added because of https://gitlab.gnome.org/GNOME/pango/-/issues/767

In this issue there is now a user that says that the 001-fix-font-rendering.patch in Gtk should be enough to solve the issue, so maybe we can drop this patch in pango now?

[lazka]

In this issue there is now a user that says that the 001-fix-font-rendering.patch in Gtk should be enough to solve the issue, so maybe we can drop this patch in pango now?

That were two separate issues IIRC, one for the anti-alias colors being wrong in cairo, and one for anti-aliasing being disabled in gtk completely. But sure, I can try.

[lb90]

Hi everyone! 🙂

I am finishing an MR in Cairo which addresses the problem of color fringing: https://gitlab.freedesktop.org/cairo/cairo/-/merge_requests/602. Once finished we can include it as a patch and enable DWrite fonts in Cairo

[lb90]

Ok, opened a PR!

[cal0pteryx]

Cairo 1.18.4 has just been released. Among other fixes, the following should be relevant for this issue:

the DirectWrite backend now supports font variations and proper glyph coverage

and this package:

The DirectWrite backend now builds on MINGW 11

Should I open an issue for updating the cairo package?

[lb90]

Hi @cal0pteryx! I have now updated the PR

[cal0pteryx]

Thanks a lot!