RFR: 8269806: Emoji rendering on Linux

[Nikita Gubarkov]

On Thu, 24 Mar 2022 02:32:31 GMT, Phil Race <prr at openjdk.org> wrote:

>> It was implemented in JetBrains Runtime a year ago and was ported & refactored for this PR
>> It includes:
>> - Bitmap glyph loading via Freetype
>> - Manual scaling & transformation of bitmap glyphs with nearest-neighbor or bilinear-mipmap style algorithms depending on the text antialiasing hint
>> - Storing BGRA glyphs in glyph cache & rendering them as plain images, as currently used XRender text drawing functions doesn't support colored glyphs
>> - Small fixes in related code like null-checks which could cause NPE & comment typos
>
> It didn't build for me and it didn't work for me  - on X11. So is there an update or should it be returned to draft or handed off to someone else ?

@prrace do you have any ideas how can I reproduce these rendering issues?

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PR: https://git.openjdk.java.net/jdk/pull/4798