RustFig
Copyright (c) 2026 The RustFig contributors

RustFig is licensed under either of the Apache License, Version 2.0
(LICENSE-APACHE) or the MIT license (LICENSE-MIT), at your option.

RustFig is a Rust reimplementation of xfig. Its behaviour follows xfig's
documentation and sources, and parts of it are ported from xfig and fig2dev
(https://mcj.sourceforge.net/). xfig and fig2dev are (c) 1985-1988 Supoj
Sutanthavibul, (c) 1991 Micah Beck, and Brian V. Smith, Paul King, Thomas
Loimer and other contributors, under the xfig licence (SPDX: Xfig), which
permits use, modification, sublicensing and redistribution provided the
copyright and permission notice remain intact. That notice is reproduced
in LICENSE-xfig, which also lists every RustFig file derived from xfig or
fig2dev with its sources; each of those files names its sources in a
comment and points to LICENSE-xfig. The bundled manual (docs/manual/) is written for RustFig and adapts parts of xfig's HTML manual (doc/html/), under the same xfig licence and notice.

X-splines are implemented from the published paper: C. Blanc and
C. Schlick, "X-Splines: A Spline Model Designed for the End User",
SIGGRAPH '95.

Assets
------
This repository contains no image, icon or font files. Fill patterns and
colour tables are generated in code; the mode panel icons are xfig's
bitmaps from w_icons.c, kept as byte arrays in source code under the xfig
licence (see ASSETS.md and LICENSE-xfig). The attribute pictures are also
drawn as vectors in code (ui-egui/src/vector_icons.rs), RustFig's own work
after xfig's compositions, and xfig's mode icons are traced as vectors
(ui-egui/src/mode_icons.rs). The application icon is an original drawing
generated in code (ui-egui/src/app_icon.rs), MIT OR Apache-2.0.

Fonts used at run time
----------------------
- Key symbols (⌘ ⇧ ⌥ ⌃ ⌫ ⎋ ↩ ⇥): assets/fonts/rustfig-key-symbols.ttf, a subset of
  Noto Sans Symbols 2, Noto Sans Symbols and Noto Sans Math (Copyright 2022 The
  Noto Project Authors, SIL Open Font License 1.1, assets/fonts/OFL.txt),
  renamed "RustFig Key Symbols"; embedded as the last fallback font.
- Optional, not bundled: TeX Gyre fonts (GUST Font License) that the user
  installs from CTAN with Help > Install TeX Gyre fonts…; the licence is
  unpacked next to them.
- Fallback: Ubuntu Light (Ubuntu Font Licence 1.0) and Hack (MIT/Bitstream
  Vera licence), bundled inside the `epaint_default_fonts` crate (a
  dependency, MIT OR Apache-2.0), used for canvas and bitmap text.

PDF pictures are read by fig2dev with the hayro crates (hayro, hayro-interpret,
hayro-syntax, hayro-write, by Laurenz Stampfl; MIT OR Apache-2.0) and their
permissive dependencies; see fig2dev's NOTICE and Cargo.lock.

The system clipboard for Copy as picture uses the clipboard-rs crate (ChurchTao;
MIT OR Apache-2.0) and its platform dependencies.

Third-party Rust crates are used under their own licences (MIT, Apache-2.0,
BSD, Zlib and similar permissive licences); see Cargo.lock.