Solving the Ligature Puzzle in Monospace Fonts
2025-01-10
A developer building a graphical code editor encountered a challenge with ligature rendering in monospace fonts. Enabling ligatures introduced an extra glyph, "LIGSPACE", causing incorrect rendering for certain character combinations. Through experimentation, the developer discovered this wasn't a true ligature, but a zero-width placeholder adjusting spacing. The solution involved ignoring glyphs with zero rendering dimensions, effectively resolving the issue. This post shares the findings and insights gained during this debugging journey.