# 第三方组件 / Third-party components

本仓库自身代码为 MIT（见 [LICENSE](LICENSE)）。下列第三方组件各有自己的许可。

This repository's own code is MIT (see [LICENSE](LICENSE)). The components below
carry their own licences.

## 运行依赖 / Runtime dependency

### @mlightcad/libredwg-web

- 版本 / version: 0.7.17（随包放在 `vendor/`）
- 许可 / licence: **GPL-3.0**
- 用途 / purpose: 把 `.dwg` 解成 DXF。**只有 `.dwg` 需要它**；`.dxf` 是纯文本，完全不碰 wasm。
  Decodes `.dwg` into DXF. **Only `.dwg` needs it**; `.dxf` is plain text and never touches wasm.
- 上游 / upstream: https://github.com/mlightcad/libredwg-web

**分发提醒 / Distribution note**

`vendor/` 里的是 GPL-3.0 代码。若你的分发方式需要规避 GPL 传染，请移除 `vendor/`
并让用户从 registry 安装该依赖（`dependencies` 里已声明），或改用其他 DWG 方案；
`.dxf` 预览不受影响。

`vendor/` holds GPL-3.0 code. If your distribution must avoid GPL, remove `vendor/`
and let users install the dependency from a registry (it is already declared in
`dependencies`), or choose another DWG decoder. `.dxf` preview is unaffected.

## 代码来源 / Code lineage

插件骨架、零依赖 DXF 渲染器与 DWG(WASM) 解码路径来自
[dsh-dwg-preview](https://github.com/linanbuan/dsh-dwg-preview) v1.0.0（MIT），
作者 [@linanbuan](https://github.com/linanbuan)。其 MIT 署名如下，保留全文：
Its MIT notice follows in full:

The plugin skeleton, the dependency-free DXF renderer and the DWG (WASM) decode
path come from [dsh-dwg-preview](https://github.com/linanbuan/dsh-dwg-preview)
v1.0.0 (MIT) by [@linanbuan](https://github.com/linanbuan).

```
MIT License

Copyright (c) 2026 linanbuan

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.
```