Avalloy.IconsThe icon pipeline
One control renders every glyph, the geometry is authored once as an SVG, and packs swap as a dictionary. Avalloy.Icons is the pure part, the flattener, the baker and the pack writer, with no Avalonia dependency; Avalloy.IconTool is that baker as a dotnet tool; and Core holds the runtime, GlyphIcon, the resolver and the picker, plus a baseline Lucide pack.
Rendering a glyph
<icons:GlyphIcon Glyph="chevron-up" Size="16" Foreground="{DynamicResource Text.Secondary}"/>GlyphIcon resolves the Icon.<Glyph> resource from the nearest scope, so it works inside a per-theme ThemeVariantScope and pack switching is a dictionary swap, and draws it tinted by Foreground, which inherits the ambient text colour. Fill or stroke per the glyph's metadata; duotone glyphs swap to their lit layer on pointer-over. An id is the SVG filename without its extension, and packs follow the Lucide convention of one file per icon named uniformly, so swapping packs keeps the same command set working.
Curated roles are aliases a pack bakes in, Chevron, Check, Close, Warning, Success and the shell staples, so Core's control templates can reference a role and any pack that bakes the roles satisfies them.
FileIcon is the full-colour file-type badge from the Material Icon Theme, keyed by extension; an unknown extension renders nothing and takes no space.
Packs
IconResolver discovers packs, bundled through AvaloniaResource and installed by the user, exposes the active one, and resolves ids. Sources are ordered and later ones override earlier ones by pack id, so an app can ship its own lucide over Avalloy's baseline, and user packs override all bundled. Override AppIconPackSources on the app class to contribute yours, and DefaultIconPackId to pick the default.
A bundled pack is a baked <id>.icons.axaml plus pack.json under Assets/iconpacks/<id>/, parsed by the XAML loader. A user pack is raw SVGs, baked at load time through IconBaker and IconGlyphMaterializer.
IconPickerView and IconPickerViewModel are the reusable picker: a search box over a grid of swatches, raising exactly one picked id. Build one over the active pack with FromResolver, and fill the Footer slot with app affordances such as image upload.
Baking
SVGs become XAML geometry at build time. See Baking a pack.