tree e65f42505faa7abf4d5bc2ae68cd29a52b1dd022
parent 817166976b2942cf793ea01c33c1d358ac61f76f
author Marc Kupietz <kupietz@ids-mannheim.de> 1784812619 +0200
committer Marc Kupietz <kupietz@ids-mannheim.de> 1784813903 +0200

Render emoji with a Chrome-PDF-compatible Twemoji build

The previous attempt (8171669, reverted in 8abef81) installed upstream
Twemoji's own release, which uses the SVGinOT color-font format. Chrome
renders SVGinOT in color on screen, but its print-to-PDF path doesn't
support it and silently falls back to the font's monochrome outline
glyphs -- confirmed via `pdffonts` showing the embedded glyphs as a
plain (non-color) font subset in a real CI-built poster.

Fedora's twitter-twemoji-fonts package instead ships Twemoji as
CBDT/CBLC (bitmap glyphs), the same technology Noto Color Emoji uses,
which Chrome does support for PDF export (verified locally: embeds as
a color Type 3 font, and renders correctly in the printed poster).
Extract just the .ttf from Fedora's RPM via rpm2cpio/cpio rather than
adding a whole extra package repository.

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>
Change-Id: Ic6168efa44af3b0a84ecdb643e483d107aaac547