$ show drewnoakes/figgle
Figgle is a .NET library for rendering ASCII art banners using FIGlet fonts. It parses standard .flf font files and applies smushing/kerning rules for character merging. The library is delivered as multiple NuGet packages: Figgle (core rendering), Figgle.Fonts (250+ embedded fonts), and Figgle.Generator (Roslyn source generators for compile-time font embedding and text rendering). The repository includes a Blazor WebAssembly interactive demo site, four sample projects, a comprehensive test suite, and a CI/CD pipeline that publishes to NuGet. The codebase demonstrates solid engineering with incremental source generators, string pooling for memory efficiency, and careful parsing of the FIGfont specification. This is a library, not a standalone application.
The LLM identified 4 files worth highlighting for reuse:
A string deduplication utility that caches and reuses string instances during font parsing. It reduces memory pressure when parsing thousands of character glyphs by ensuring identical strings share the same reference. The class is small (<100 lines), has no external dependencies beyond System.Collections.Generic, and can be extracted into any .NET project that needs to reduce string duplication.
A number parser that handles decimal, octal, and hexadecimal integer literals used in FIGfont header lines. It demonstrates a clean state-machine approach for parsing mixed-format numbers with explicit radix detection. It is self-contained (no internal imports) and could be reused in any project requiring parsing of numeric strings with variable bases.
Parses the FIGfont (.flf) format, including header metadata, character definitions, and codetag mappings. It handles smushing mode definitions, hardblank characters, and the full FIGfont 2 specification. The parser is isolated from the rest of the library (only depends on System.IO, System.Text, and the core FiggleFont/ParseUtil/StringPool types) and could be extracted as a standalone parser for FIGlet fonts.
A Roslyn incremental source generator that emits C# code to render FIGlet text at compile time via the [GenerateFiggleText] attribute. It demonstrates advanced use of IIncrementalGenerator, SyntaxValueProvider.ForAttributeWithMetadataName, and efficient source generation with cached font data. This pattern is reusable as a template for any .NET project needing compile-time text or resource generation.