# Third-party components / Üçüncü taraf bileşenler

trkPDF itself is licensed under the **GNU Affero General Public License v3.0** (see `LICENSE`).
The Windows installer additionally contains the following components. Their license texts are
installed in the `licenses` folder and, where supplied by the packages, under `licenses/third-party/`.

| Component | Version | License | Source |
|---|---|---|---|
| PyMuPDF / MuPDF (Artifex Software) – PDF engine | 1.24.11 | GNU AGPL v3 (commercial license available from Artifex) | https://github.com/pymupdf/PyMuPDF · https://github.com/ArtifexSoftware/mupdf |
| Qt 5.15 via PySide2 (Qt for Python) – user interface | 5.15.2.1 | GNU LGPL v3 | https://code.qt.io/cgit/pyside/pyside-setup.git · https://download.qt.io/official_releases/qt/5.15/ |
| Python (python-build-standalone distribution) | 3.8.20 | Python Software Foundation License | https://www.python.org · https://github.com/astral-sh/python-build-standalone |
| fontTools – font subsetting | 4.57.0 | MIT | https://github.com/fonttools/fonttools |
| Microsoft Visual C++ runtime DLLs (via the `msvc-runtime` package) | 14.44 | Microsoft Visual C++ Redistributable terms | https://learn.microsoft.com/cpp/windows/redistributing-visual-cpp-files |
| NSIS – installer | 3.09 | zlib/libpng license | https://nsis.sourceforge.io |

## LGPL notice (Qt / PySide2)
Qt and PySide2 are used as unmodified, dynamically linked libraries (`Qt5*.dll`, `PySide2\*.pyd`).
You may replace them with your own build of the same libraries; see the source links above.

## AGPL notice (PyMuPDF / MuPDF and trkPDF)
The complete corresponding source code of trkPDF, including the scripts that build the installer,
is published together with each release. The source of PyMuPDF/MuPDF is available at the links above.