# Third-Party Notices

Patchy's current Windows release package uses the Qt 6 desktop runtime and
app-local Microsoft Visual C++ runtime DLLs. Planned libraries that are not
linked into the application are intentionally not listed here.

## Qt 6

The Windows application dynamically links Qt 6 modules from the local Qt
installation used for the release build:

- Qt Core
- Qt GUI
- Qt Widgets
- Qt PrintSupport
- Qt SVG
- Qt ImageFormats

The package also includes the Qt plugins needed by the current app:

- `platforms/qwindows.dll`
- `styles/qmodernwindowsstyle.dll`
- `iconengines/qsvgicon.dll`
- `imageformats/qjpeg.dll`
- `imageformats/qsvg.dll`
- `imageformats/qtiff.dll`
- `imageformats/qwebp.dll`

Qt is available under a commercial Qt license or under open-source licenses.
This local zip uses dynamic Qt DLLs and includes the Qt module SPDX notice files
under `licenses/qt/` so downstream review can see the exact Qt build metadata,
third-party components, and license text extracted by Qt.

## Microsoft Visual C++ Runtime DLLs

The Windows package includes the app-local Microsoft Visual C++ runtime DLLs
from the local Visual Studio redistributable CRT directory. These DLLs are
provided under Microsoft's runtime redistribution terms.

## Noto Naskh Arabic

Patchy includes Noto Naskh Arabic Regular and Bold from the Noto Arabic fonts
project for Photoshop text-layer compatibility. The font files are distributed
under the SIL Open Font License, Version 1.1; the license text is included at
`fonts/noto_naskh_arabic/OFL.txt` in the release package.

## Bundled fonts (web build only)

The WebAssembly build bundles a set of open fonts under `third_party/fonts-web/`
because a browser exposes no system fonts to the app. Desktop packages do not
include these files. Every family is distributed under the SIL Open Font
License, Version 1.1, and each family directory carries its own license text as
`OFL.txt`, packaged into the web build's preloaded data file. All files are
unmodified static-instance builds fetched from the projects' official
repositories on 2026-07-31:

| Family | Files | Source |
| --- | --- | --- |
| Liberation Sans / Serif / Mono | 12 (R/B/I/BI each) | github.com/liberationfonts/liberation-fonts, release 2.1.5 |
| Carlito | 4 (R/B/I/BI) | github.com/google/fonts, `ofl/carlito` |
| Noto Sans | 4 (R/B/I/BI) | github.com/notofonts/notofonts.github.io, `fonts/NotoSans/hinted/ttf` |
| Noto Serif | 4 (R/B/I/BI) | github.com/notofonts/notofonts.github.io, `fonts/NotoSerif/hinted/ttf` |
| Noto Sans JP | 2 (Regular, Bold) | Google Fonts static TTF builds (fonts.gstatic.com via the css2 API; the TrueType-outline builds Google serves for JP web use, preferred over the noto-cjk CFF OTFs for FreeType rendering consistency) |
| Montserrat | 2 (Regular, Bold) | github.com/JulietaUla/Montserrat, `fonts/ttf` |
| Oswald | 2 (Regular, Bold) | github.com/googlefonts/OswaldFont, `fonts/ttf` |
| Caveat | 2 (Regular, Bold) | github.com/googlefonts/caveat, `fonts/ttf` |
| Abril Fatface | 1 (Regular) | github.com/google/fonts, `ofl/abrilfatface` |
| Pacifico | 1 (Regular) | github.com/google/fonts, `ofl/pacifico` |
| Lobster | 1 (Regular) | github.com/google/fonts, `ofl/lobster` |

## miniz

`src/formats/miniz/` vendors miniz 3.0.2 (https://github.com/richgel999/miniz),
the single-source zlib/deflate implementation used by the Aseprite file format's
compressed cels. MIT License; the license text is included at
`src/formats/miniz/LICENSE`.

## stb_image

`src/formats/stb/` vendors stb_image 2.30 (https://github.com/nothings/stb),
compiled decode-only and restricted to JPEG and PNG. It decodes the original
image files that Affinity .af documents embed for placed/opened pictures (the
document stores only a mip pyramid plus the untouched original). stb_image is
dual-licensed MIT / public domain; Patchy uses it under the MIT license,
included at `src/formats/stb/LICENSE`.

## Zstandard

`src/formats/zstd/` vendors the decompression half of Zstandard 1.5.7
(https://github.com/facebook/zstd, Copyright Meta Platforms, Inc. and
affiliates) as the project's generated single-file decoder (`zstddeclib.c`
from `build/single_file_libs`), used to read the compressed streams inside
Affinity .af documents. Zstandard is dual-licensed BSD-3-Clause / GPLv2;
Patchy uses it under the BSD-3-Clause license, included at
`src/formats/zstd/LICENSE`. No compression code is vendored.

## Little CMS

`src/color/lcms2/` vendors the Little CMS 2.17 core library
(https://github.com/mm2/Little-CMS), used to convert CMYK PSD documents through
their embedded ICC color profile on import. Only the MIT-licensed core is
vendored (the optional lcms2 speed plugins are GPL-licensed and are not
included); the license text is included at `src/color/lcms2/LICENSE`.

## libheif (web build only)

`src/formats/libheif/` vendors libheif 1.23.1
(https://github.com/strukturag/libheif), Copyright Dirk Farin and
contributors, under the GNU Lesser General Public License version 3 or later.
The complete LGPL/GPL license text is included at
`src/formats/libheif/COPYING` and is staged with the web application as
`libheif-COPYING.txt`.

Patchy fetched the official `v1.23.1` source archive from
`https://github.com/strukturag/libheif/archive/refs/tags/v1.23.1.zip`. Its
SHA-256 is
`F2303C92396B672D8B1BF8156DC1FC1715CC5D4AE1F147D205EA957DB334B2FA`.
Patchy's local change to `libheif/plugins/decoder_webcodecs.cc` adds runtime
capability/error handling, safe asynchronous input copies, decoder/frame
lifetime cleanup, decoded-buffer bounds checks, and support for odd-sized and
multi-slice images. That modified source is included in this repository.

libheif is linked only into Patchy's WebAssembly browser application as an
HEIF container parser and bridge to the browser's WebCodecs HEVC decoder.
The build disables libde265, x265, FFmpeg, every other software codec backend,
every compressed-codec encoder backend, dynamic plug-in loading, and the
experimental uncompressed codec. Patchy does not distribute an HEVC decoder
or encoder.

Patchy's complete corresponding application source is available under the MIT
License at `https://github.com/SethRobinson/Patchy`. The pinned toolchain,
configuration, and rebuild instructions are in `docs/wasm.md`; they permit a
recipient to replace libheif with a modified interface-compatible version and
relink the WebAssembly application. Release tags identify the source for each
deployed version.

## LibRaw

`src/formats/libraw/` vendors LibRaw 0.22.1 (https://www.libraw.org,
Copyright (C) 2008-2025 LibRaw LLC), the camera raw decoder and develop
pipeline behind opening CR2/CR3/NEF/ARW/RAF/DNG and other camera raw files.
LibRaw is dual-licensed and may be used under either the GNU LGPL 2.1 or the
CDDL 1.0; Patchy uses it under the CDDL 1.0. Only the stock release tarball is
vendored: the separate LibRaw demosaic-pack repositories are GPL-licensed and
are not included. LibRaw itself incorporates code from dcraw (Dave Coffin,
non-restricted portions), the BSD-licensed DCB demosaic and FBDD denoise
(Jacek Gozdz), the BSD-licensed X3F tools (Roland Karlsson), and MIT-licensed
Adobe DNG SDK fragments. The license texts are included at
`src/formats/libraw/LICENSE.CDDL`, `src/formats/libraw/LICENSE.LGPL`, and
`src/formats/libraw/COPYRIGHT`.

## Bundled photo-texture pattern presets (Poly Haven, CC0)

The 20 photo-based pattern presets under the "Textures" folder (embedded as
512x512 PNG tiles in `src/ui/textures/`, ids in `src/core/pattern_presets.cpp`)
are downscaled diffuse maps from Poly Haven (https://polyhaven.com), published
under CC0 ("You can use our assets for any purpose, including commercial work.
You do not need to give credit or attribution"). All are real photo-scanned
surfaces created by named human artists (no AI generation, per
docs/legal-constraints.md); the 1K PNG masters were fetched from dl.polyhaven.org on
2026-07-12 and downscaled losslessly (no JPEG step) with a seam-preserving
3x3-tile filter.

| Patchy preset | Poly Haven asset | Author(s) |
| --- | --- | --- |
| Fine Wood Grain | fine_grained_wood | Rob Tuytel |
| Dark Walnut | dark_wood | Dario Barresi, Dimitrios Savva, Rico Cilliers |
| Oak Veneer | oak_veneer_01 | Jenelle van Heerden |
| Weathered Wood | rough_wood | Rob Tuytel |
| Old Planks | old_planks_02 | Rob Tuytel |
| Medieval Wood | medieval_wood | Rob Tuytel |
| Tree Bark | bark_brown_01 | Rob Tuytel |
| Weathered Marble | marble_rock_01 | (Poly Haven) |
| Slate Slabs | slab_tiles | (Poly Haven) |
| Granite Blocks | japanese_stone_wall | (Poly Haven) |
| Rock Face | rock_face | (Poly Haven) |
| Coarse Rust | rust_coarse_01 | Dimitrios Savva, Rico Cilliers |
| Steel Plate | metal_plate | Rob Tuytel |
| Brown Leather | brown_leather | Rob Tuytel |
| Denim Weave | denim_fabric | (Poly Haven) |
| Burlap | hessian_230 | (Poly Haven) |
| Rippled Sand | damp_sand | (Poly Haven) |
| Snow | snow_02 | (Poly Haven) |
| Cracked Earth | mud_cracked_dry_03 | (Poly Haven) |
| Mossy Forest Floor | forest_leaves_02 | (Poly Haven) |

Each asset page is `https://polyhaven.com/a/<asset id>`. CC0 requires no
attribution; the authors are credited here voluntarily (authors marked
"(Poly Haven)" are listed on the asset pages).

## Test fixtures (not distributed with the application)

Files under `test-fixtures/` are used only by the automated test suites and are
not part of any release package.

- `test-fixtures/readme/san_francisco_cityscape_cc0.jpg`: "Cityscape of San
  Francisco," photographed by Vladimir Mokry and published under the Creative
  Commons CC0 1.0 Universal Public Domain Dedication. The exact Wikimedia
  Commons original was downloaded on 2026-07-15 from
  https://commons.wikimedia.org/wiki/File:Cityscape_of_San_Francisco.jpg
  (SHA-256 `8B09FA97853316DC4C548C7A1631D4C0955148338DF7CA2E75BAA5BC576DDE0D`).
  It is used only to regenerate the README Tilt-Shift Blur screenshot.
- `test-fixtures/svg/hot_air_balloons_cc0.svg`: "Hot Air Balloon Scene," a
  vector illustration published under the Creative Commons CC0 1.0 Universal
  Public Domain Dedication (uploader OpenClipart). The exact file was
  downloaded on 2026-07-18 from https://freesvg.org/hot-air-balloon-scene
  (SHA-256 `72F141E0F46C71E646349B56B28812C17653AF045739C89F73C0D02B44021DA4`).
  It is used only to regenerate the README SVG-import screenshot and by the
  SVG import tests.
- `test-fixtures/ico/cpython-py.ico`: the CPython `py.ico` application icon
  from https://github.com/python/cpython (`PC/icons/py.ico`), included under the
  Python Software Foundation License 2.0 as a real-world multi-size icon sample.
- `test-fixtures/ico/vscode-code.ico`: the Visual Studio Code application icon
  from https://github.com/microsoft/vscode (`resources/win32/code.ico`),
  included under the MIT License as a real-world PNG-entry icon sample.
- `test-fixtures/ico/pillow-*.ico` / `pillow-cursor.cur`,
  `test-fixtures/tga/pillow-*.tga`, and `test-fixtures/gif/pillow-animated.gif`:
  generated locally with the Pillow imaging library (self-authored art; no
  third-party content).
- `test-fixtures/af/tiny-*.af` and `tiny-rgba8.png`: Affinity documents
  (self-authored gradient/pattern images, a nested-group document, and a CMYK
  conversion) created by the Patchy team by scripting a licensed Affinity 3.2.3
  install through its built-in JavaScript SDK; no third-party content. Used by
  the .af importer tests.
- `test-fixtures/af/tiny-v2-*.afphoto`: Affinity 2 documents (simple color
  fills, a curve shape, and short text) created by the Patchy team
  interactively in a licensed Affinity Photo 2.6.5 install; no third-party
  content. Used by the 2.x extension importer tests.
- `test-fixtures/aseprite/*.aseprite` and
  `aseprite-blend-modes-reference.png` (Aseprite's own flattened render of the
  blend-mode fixture): authored locally with Aseprite 1.3.17 via a batch script
  (self-authored art; no third-party content).
- `test-fixtures/pat/hue.pat`: a real Photoshop pattern fixture from Jaroslav
  Bereza's `jardicc/pat-parser` repository, included under the MIT License.
  The pinned source URL, checksum, copyright notice, and full license text are
  in `test-fixtures/pat/NOTICE.txt`.
- `test-fixtures/heif/quadrants.heic`: encoded from a self-authored
  quadrant-color PNG with Apple's `sips` tool on macOS (self-authored art; no
  third-party content).

## Built-in color palette presets

The palette presets bundled for the palettized editing mode fall into two
groups. Hardware palettes (NES/2C02, Commodore 64 in Pepto's calibrated
rendering, Game Boy, CGA/EGA, the DOS/VGA mode-13h default DAC table, ZX
Spectrum, MSX/TMS9918, Amstrad CPC) are RGB renderings of hardware color
generation and are factual data, not copyrightable works. Community palettes
are included only where the author allows free use: the PICO-8 palette
(Lexaloffle explicitly permits using the PICO-8 palette in any work),
DawnBringer's DB16/DB32 palettes (published freely by their author on the
Pixelation forums and mirrored on Lospec), and the Dink Smallwood game palette
(RTsoft's own title, included by its author). All preset tables are generated
in code at `src/core/palette_presets.cpp`; no palette files are redistributed.