FontLoaderSub

OpenType font loader for subtitles (ASS/SSA), inspired by CryptWizard's FontLoader.

Instead of font files, drag-and-drop ASS/SSA subtitles and it will load corresponding font files in its directory.

Usage

1. Move FontLoaderSub.exe to the root of font directory;
2. Drag-and-drop subtitles *.ass (or folders) onto FontLoaderSub.exe.

Use FontLoaderSub.exe -old to force the Win32 interface. The switch can appear before or after subtitle paths, for example FontLoaderSub.exe -old "episode.ass".

UI

On Windows 10 1809 or later with a compatible Windows App Runtime 1.8 installed, the single executable uses WinUI 3. Other devices automatically use Win32.

The Win32 interface retains its original behavior:

• Line 1: requested fonts from subtitles;
• Line 2: stats for font collection;
• OK: minimize;
• Retry: rebuild font cache;
• Close, Esc key, Alt+F4: unload fonts and exit.

Note

• In order to work with huge font collections, font cache fc-subs.db will be built for fast lookup.
• Only accept ASS/SSA files under 64MB, encoded in Unicode with BOM.
• Windows 7 (or later) required.

Build

Example (with pixi):

pixi run build

Meson builds the optional WinUI code directly into the executable. It prepares pinned Windows App SDK / C++/WinRT build packages from the local NuGet cache or downloads them from NuGet; the remaining dependencies continue to use vcpkg. Use -Dwinui=false with Meson to build only the Win32 interface.