[labaznov]

The generator currently exports only ASCII. This adds available Cyrillic glyphs (U+0400–U+04FF) and note punctuation (U+00AB/U+00BB/U+2013/U+2014/U+2122) using GetGlyphOutlineW and explicit GLYPH_U32 entries, while retaining the legacy sequential ASCII entries.

extend_font.py appends generated Unicode glyphs to an existing atlas. This preserves existing pixels, coordinates and metrics when the current font/rasterizer would otherwise change them, and skips Unicode codepoints already present so that extending a font again does not replace them. It requires Pillow and matching font heights. Font licensing remains separate from the generator license.

This draft is the asset-generation part of Cyrillic support for PoB Notes. It needs a corresponding SimpleGraphic reader change; it does not localize game data or the UI.

Validation on Windows with VS2022:

• tests/fontgen_test.cpp and the asset-generation runner compiled with VS2022 x86, exit 0; 9 native tests pass. The five punctuation cases failed before the follow-up change.
• python -m unittest discover -s tests -p test_extend_font.py: 5 tests pass, including an existing-Unicode regression that fails without the duplicate-codepoint guard.
• Generated Liberation Sans 2.1.5 assets at all 16 existing heights: original ASCII and Cyrillic metadata and atlas pixels remain identical after extension; all 80 new punctuation glyphs have nonempty pixels. The actual renderer passes 1,345 font/color/cursor checks.
• git diff --check: exit 0.

The README documents the format and reproduction commands. The Python tests use generated temporary fixtures; no font binaries are added to this repository.

Companion drafts: SimpleGraphic #122 and PoB #10452.