# Third-party notices `@drietsch/sketch` is distributed as a single bundled ES module with no runtime dependencies. The following third-party code and data are compiled into `dist/`, and their notices are reproduced here as their licenses require. - [roughjs](#roughjs) and four small libraries it uses: the sketch engine (MIT) - [Grape Nuts](#grape-nuts): the default font, as glyph outlines (SIL Open Font License 1.1) - [Hershey Fonts](#hershey-fonts): the alternative stroke font (permissive use restriction) - [sketchyicons](#sketchyicons), derived from Lucide and Feather: the built-in icons (MIT / ISC / MIT) The published bundle is not minified and comments are preserved, so the code below is also identifiable in `dist/index.js`. --- ## roughjs The sketch-geometry engine in `src/sketch/` is derived from [roughjs](https://github.com/rough-stuff/rough). ``` MIT License Copyright (c) 2019 Preet Shihn Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions: The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software. THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. ``` --- ## Bundled dependencies All four are MIT licensed, © Preet Shihn. | Package | Version | Source | | ------------------ | ------- | ------------------------------------------ | | `hachure-fill` | 0.5.2 | https://github.com/pshihn/hachure-fill | | `path-data-parser` | 0.1.0 | https://github.com/pshihn/path-data-parser | | `points-on-curve` | 0.2.0 | https://github.com/pshihn/points-on-curve | | `points-on-path` | 0.2.1 | https://github.com/pshihn/points-on-path | Each carries the MIT license text reproduced above, with copyright held by Preet Shihn. --- ## Grape Nuts The default font, `src/text/fonts/grape-nuts.ts`, is the outline data of [Grape Nuts](https://fonts.google.com/specimen/Grape+Nuts) by Robert Leuschke (the Grape Nuts Project Authors), converted to SVG path data by `scripts/gen-outline-font.mjs` from `vendor/grape-nuts/GrapeNuts-Regular.ttf`. It is drawn in capitals only, so the lower-case glyphs are not included. ``` Copyright 2003 The Grape Nuts Project Authors (https://github.com/googlefonts/grapenuts) This Font Software is licensed under the SIL Open Font License, Version 1.1. This license is copied below, and is also available with a FAQ at: https://scripts.sil.org/OFL ----------------------------------------------------------- SIL OPEN FONT LICENSE Version 1.1 - 26 February 2007 ----------------------------------------------------------- PREAMBLE The goals of the Open Font License (OFL) are to stimulate worldwide development of collaborative font projects, to support the font creation efforts of academic and linguistic communities, and to provide a free and open framework in which fonts may be shared and improved in partnership with others. The OFL allows the licensed fonts to be used, studied, modified and redistributed freely as long as they are not sold by themselves. The fonts, including any derivative works, can be bundled, embedded, redistributed and/or sold with any software provided that any reserved names are not used by derivative works. The fonts and derivatives, however, cannot be released under any other type of license. The requirement for fonts to remain under this license does not apply to any document created using the fonts or their derivatives. DEFINITIONS "Font Software" refers to the set of files released by the Copyright Holder(s) under this license and clearly marked as such. This may include source files, build scripts and documentation. "Reserved Font Name" refers to any names specified as such after the copyright statement(s). "Original Version" refers to the collection of Font Software components as distributed by the Copyright Holder(s). "Modified Version" refers to any derivative made by adding to, deleting, or substituting -- in part or in whole -- any of the components of the Original Version, by changing formats or by porting the Font Software to a new environment. "Author" refers to any designer, engineer, programmer, technical writer or other person who contributed to the Font Software. PERMISSION & CONDITIONS Permission is hereby granted, free of charge, to any person obtaining a copy of the Font Software, to use, study, copy, merge, embed, modify, redistribute, and sell modified and unmodified copies of the Font Software, subject to the following conditions: 1) Neither the Font Software nor any of its individual components, in Original or Modified Versions, may be sold by itself. 2) Original or Modified Versions of the Font Software may be bundled, redistributed and/or sold with any software, provided that each copy contains the above copyright notice and this license. These can be included either as stand-alone text files, human-readable headers or in the appropriate machine-readable metadata fields within text or binary files as long as those fields can be easily viewed by the user. 3) No Modified Version of the Font Software may use the Reserved Font Name(s) unless explicit written permission is granted by the corresponding Copyright Holder. This restriction only applies to the primary font name as presented to the users. 4) The name(s) of the Copyright Holder(s) or the Author(s) of the Font Software shall not be used to promote, endorse or advertise any Modified Version, except to acknowledge the contribution(s) of the Copyright Holder(s) and the Author(s) or with their explicit written permission. 5) The Font Software, modified or unmodified, in part or in whole, must be distributed entirely under this license, and must not be distributed under any other license. The requirement for fonts to remain under this license does not apply to any document created using the Font Software. TERMINATION This license becomes null and void if any of the above conditions are not met. DISCLAIMER THE FONT SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO ANY WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT OF COPYRIGHT, PATENT, TRADEMARK, OR OTHER RIGHT. IN NO EVENT SHALL THE COPYRIGHT HOLDER BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, INCLUDING ANY GENERAL, SPECIAL, INDIRECT, INCIDENTAL, OR CONSEQUENTIAL DAMAGES, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF THE USE OR INABILITY TO USE THE FONT SOFTWARE OR FROM OTHER DEALINGS IN THE FONT SOFTWARE. ``` ## Hershey Fonts The built-in text font (`src/text/fonts/hershey-sans.ts`) is a converted copy of `futural.jhf`, the "Hershey Sans 1-stroke" font from the 1986 Usenet distribution of the Hershey Fonts, taken from https://github.com/kamalmostafa/hershey-fonts. The original file and the distribution's use restriction are in `vendor/hershey/`. As that restriction requires: - The Hershey Fonts were originally created by Dr. A. V. Hershey while working at the U. S. National Bureau of Standards. - The format of the Font data in this distribution was originally created by James Hurt, Cognition, Inc., 900 Technology Park Drive, Billerica, MA 01821 (mit-eddie!ci-dandelion!hurt). The data is redistributed here in a converted form, not in the format distributed by the U.S. NTIS. --- ## sketchyicons The built-in icons (`src/icons/builtin.ts`) are copied from [`@sketchyicons/data`](https://github.com/Fantomiald/sketchyicons), whose code is MIT licensed and whose geometry is derived from Lucide (ISC) and, for some icons, Feather (MIT). sketch is not affiliated with sketchyicons, Lucide or Feather. ``` MIT License Copyright (c) 2026 Julien Montagne Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions: The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software. THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. ``` ### Lucide ``` ISC License Copyright (c) 2026 Lucide Icons and Contributors Permission to use, copy, modify, and/or distribute this software for any purpose with or without fee is hereby granted, provided that the above copyright notice and this permission notice appear in all copies. THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. ``` ### Feather The following built-in icons are Lucide icons derived from the Feather project: arrow-left, arrow-right, calendar, check, chevron-down, chevron-left, chevron-right, chevron-up, download, info, lock, log-in, log-out, minus, plus, search, trash-2, upload, x. ``` The MIT License (MIT) Copyright (c) 2013-present Cole Bemis Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions: The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software. THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. ```