virtualx-engine/thirdparty/README.md

# Third party libraries

Please keep categories (`##` level) listed alphabetically and matching their
respective folder names. Use two empty lines to separate categories for
readability.


## bullet

- Upstream: https://github.com/bulletphysics/bullet3
- Version: 2.89 (830f0a9565b1829a07e21e2f16be2aa9966bd28c, 2019)
- License: zlib

Files extracted from upstream source:

- src/* apart from CMakeLists.txt and premake4.lua files
- LICENSE.txt


## certs

- Upstream: Mozilla, via https://apps.fedoraproject.org/packages/ca-certificates
- Version: 2018.2.26 (2018)
- License: MPL 2.0

File extracted from a recent Fedora install:
/etc/pki/ca-trust/extracted/pem/tls-ca-bundle.pem
(It can't be extracted directly from the package,
as it's generated on the user's system.)


## cvtt

- Upstream: https://github.com/elasota/cvtt
- Version: 1.0.0-beta4 (cc8472a04ba110fe999c686d07af40f7839051fd, 2018)
- License: MIT

Files extracted from upstream source:

- all .cpp, .h, and .txt files in ConvectionKernels/


## enet

- Upstream: http://enet.bespin.org
- Version: 1.3.17 (e0e7045b7e056b454b5093cb34df49dc4cee0bee, 2020)
- License: MIT

Files extracted from upstream source:

- all .c files in the main directory (except unix.c win32.c)
- the include/enet/ folder as enet/ (except unix.h win32.h)
- LICENSE file

Important: enet.h, host.c, protocol.c have been slightly modified
to be usable by Godot's socket implementation and allow IPv6 and DTLS.
Apply the patches in the `patches/` folder when syncing on newer upstream
commits.

Three files (godot.cpp, enet/godot.h, enet/godot_ext.h) have been added to provide
enet socket implementation using Godot classes.

It is still possible to build against a system wide ENet but doing so
will limit its functionality to IPv4 only.


## etc2comp

- Upstream: https://github.com/google/etc2comp
- Version: git (9cd0f9cae0f32338943699bb418107db61bb66f2, 2017)
- License: Apache 2.0

Files extracted from upstream source:

- all .cpp and .h files in EtcLib/
- README.md, LICENSE, AUTHORS

Important: Some files have Godot-made changes.
They are marked with `// -- GODOT start --` and `// -- GODOT end --`
comments.


## fonts

- `NotoSans*.ttf`, `NotoNaskhArabicUI_Regular.ttf`:
  * Upstream: https://github.com/googlei18n/noto-fonts
  * Version: 1.06 (2017)
  * License: OFL-1.1
  * Comment: Use UI font variant if available, because it has tight vertical metrics and
    good for UI.
- `Hack_Regular.ttf`:
  * Upstream: https://github.com/source-foundry/Hack
  * Version: 3.003 (2018)
  * License: MIT + Bitstream Vera License
- `DroidSans*.ttf`:
  * Upstream: https://android.googlesource.com/platform/frameworks/base/+/master/data/fonts/
  * Version: ? (pre-2014 commit when DroidSansJapanese.ttf was obsoleted)
  * License: Apache 2.0


## freetype

- Upstream: https://www.freetype.org
- Version: 2.10.4 (6a2b3e4007e794bfc6c91030d0ed987f925164a8, 2020)
- License: FreeType License (BSD-like)

Files extracted from upstream source:

- the `src/` folder, stripped of the `Jamfile` files and the `tools` subfolder
- the `include/` folder
- `docs/{FTL.TXT,LICENSE.TXT}`


## glad

- Upstream: https://github.com/Dav1dde/glad
- Version: 0.1.34 (a5ca31c88a4cc5847ea012629aff3690f261c7c4, 2020)
- License: MIT

The files we package are automatically generated.
See the header of glad.c for instructions on how to generate them for
the GLES version Godot targets.


## jpeg-compressor

- Upstream: https://github.com/richgel999/jpeg-compressor
- Version: 2.00 (aeb7d3b463aa8228b87a28013c15ee50a7e6fcf3, 2020)
- License: Public domain or MIT

Files extracted from upstream source:

- `jpgd*.{c,h}`


## libogg

- Upstream: https://www.xiph.org/ogg
- Version: git (c8fca6b4a02d695b1ceea39b330d4406001c03ed, 2019)
- License: BSD-3-Clause

Files extracted from upstream source:

- `src/*.{c,h}`
- `include/ogg/*.h` in ogg/
- COPYING


## libpng

- Upstream: http://libpng.org/pub/png/libpng.html
- Version: 1.6.37 (a40189cf881e9f0db80511c382292a5604c3c3d1, 2019)
- License: libpng/zlib

Files extracted from upstream source:

- all .c and .h files of the main directory, except from
  `example.c` and `pngtest.c`
- the arm/ folder
- `scripts/pnglibconf.h.prebuilt` as `pnglibconf.h`
- `LICENSE`


## libsimplewebm

- Upstream: https://github.com/zaps166/libsimplewebm
- Version: git (fe57fd3cfe6c0af4c6af110b1f84a90cf191d943, 2019)
- License: MIT (main), BSD-3-Clause (libwebm)

This contains libwebm, but the version in use is updated from the one used by libsimplewebm,
and may have *unmarked* alterations from that.

Files extracted from upstream source:

- all the .cpp, .hpp files in the main folder except `example.cpp`
- LICENSE

Important: Some files have Godot-made changes.
They are marked with `// -- GODOT start --` and `// -- GODOT end --`
comments.


## libtheora

- Upstream: https://www.theora.org
- Version: 1.1.1 (2010)
- License: BSD-3-Clause

Files extracted from upstream source:

- all .c, .h in lib/
- all .h files in include/theora/ as theora/
- COPYING and LICENSE

Upstream patches included in the `patches` directory have been applied
on top of the 1.1.1 source (not included in any stable release yet).


## libvorbis

- Upstream: https://www.xiph.org/vorbis
- Version: 1.3.6 (2018)
- License: BSD-3-Clause

Files extracted from upstream source:

- `src/*` except from: `lookups.pl`, `Makefile.*`
- `include/vorbis/*.h` as vorbis/
- COPYING


## libvpx

- Upstream: https://chromium.googlesource.com/webm/libvpx/
- Version: 1.6.0 (2016)
- License: BSD-3-Clause

Files extracted from upstream source:

TODO.

Important: File `libvpx/vpx_dsp/x86/vpx_subpixel_8t_intrin_avx2.c` has
Godot-made change marked with `// -- GODOT --` comments.

The files `libvpx/third_party/android/cpu-features.{c,h}` were copied
from the Android NDK r18.


## libwebp

- Upstream: https://chromium.googlesource.com/webm/libwebp/
- Version: 1.1.0 (d7844e9762b61c9638c263657bd49e1690184832, 2020)
- License: BSD-3-Clause

Files extracted from upstream source:

- `src/*` except from: .am, .rc and .in files
- AUTHORS, COPYING, PATENTS

Important: The files `utils/bit_reader_utils.{c,h}` have Godot-made
changes to ensure they build for Javascript/HTML5. Those
changes are marked with `// -- GODOT --` comments.


## mbedtls

- Upstream: https://tls.mbed.org/
- Version: 2.16.9 (3fac0bae4a50113989b3d015cd2d948f51a6d9ac, 2020)
- License: Apache 2.0

File extracted from upstream release tarball:

- All `*.h` from `include/mbedtls/` to `thirdparty/mbedtls/include/mbedtls/`
- All `*.c` from `library/` to `thirdparty/mbedtls/library/`
- LICENSE and apache-2.0.txt files
- Applied the patch in `thirdparty/mbedtls/patches/1453.diff` (PR 1453).
  Soon to be merged upstream. Check it out at next update.
- Applied the patch in `thirdparty/mbedtls/patches/padlock.diff`. This disables
  VIA padlock support which defines a symbol `unsupported` which clashes with
  a pre-defined symbol.
- Added 2 files `godot_core_mbedtls_platform.{c,h}` providing configuration
  for light bundling with core.


## miniupnpc

- Upstream: https://github.com/miniupnp/miniupnp/tree/master/miniupnpc
- Version: git (44366328661826603982d1e0d7ebb4062c5f2bfc, 2020)
- License: BSD-3-Clause

Files extracted from upstream source:

- All `*.c` and `*.h` files from `miniupnpc` to `thirdparty/miniupnpc/miniupnpc`
- Remove `test*`, `minihttptestserver.c` and `wingenminiupnpcstrings.c`

The patch `windows_fix.diff` is applied to `minissdpc.c` to fix an upstream issue.
The only modified file is miniupnpcstrings.h, which was created for Godot
(it is usually autogenerated by cmake).


## minizip

- Upstream: http://www.zlib.net
- Version: 1.2.11 (zlib contrib, 2017)
- License: zlib

Files extracted from the upstream source:

- contrib/minizip/{crypt.h,ioapi.{c,h},zip.{c,h},unzip.{c,h}}

Important: Some files have Godot-made changes for use in core/io.
They are marked with `/* GODOT start */` and `/* GODOT end */`
comments and a patch is provided in the minizip/ folder.


## misc

Collection of single-file libraries used in Godot components.

- `clipper.{cpp,hpp}`
  * Upstream: https://sourceforge.net/projects/polyclipping
  * Version: 6.4.2 (2017) + Godot changes (added optional exceptions handling)
  * License: BSL-1.0
- `easing_equations.cpp`
  * Upstream: http://robertpenner.com/easing/ via https://github.com/jesusgollonet/ofpennereasing (modified to fit Godot types)
  * Version: git (af72c147c3a74e7e872aa28c7e2abfcced04fdce, 2008) + Godot types and style changes
  * License: BSD-3-Clause
- `fastlz.{c,h}`
  * Upstream: https://github.com/ariya/FastLZ
  * Version: 0.5.0 (4f20f54d46f5a6dd4fae4def134933369b7602d2, 2020)
  * License: MIT
- `hq2x.{cpp,h}`
  * Upstream: https://github.com/brunexgeek/hqx
  * Version: TBD, file structure differs
  * License: Apache 2.0
- `ifaddrs-android.{cc,h}`
  * Upstream: https://chromium.googlesource.com/external/webrtc/stable/talk/+/master/base/ifaddrs-android.h
  * Version: git (5976650443d68ccfadf1dea24999ee459dd2819d, 2013)
  * License: BSD-3-Clause
- `mikktspace.{c,h}`
  * Upstream: https://archive.blender.org/wiki/index.php/Dev:Shading/Tangent_Space_Normal_Maps/
  * Version: 1.0 (2011)
  * License: zlib
- `open-simplex-noise.{c,h}`
  * Upstream: https://github.com/smcameron/open-simplex-noise-in-c
  * Version: git (826f1dd1724e6fb3ff45f58e48c0fbae864c3403, 2020) + custom changes
  * License: Public Domain or Unlicense
- `pcg.{cpp,h}`
  * Upstream: http://www.pcg-random.org
  * Version: minimal C implementation, http://www.pcg-random.org/download.html
  * License: Apache 2.0
- `smaz.{c,h}`
  * Upstream: https://github.com/antirez/smaz
  * Version: git (2f625846a775501fb69456567409a8b12f10ea25, 2012)
  * License: BSD-3-Clause
  * Modifications: use `const char*` instead of `char*` for input string
- `stb_vorbis.c`
  * Upstream: https://github.com/nothings/stb
  * Version: 1.20 (314d0a6f9af5af27e585336eecea333e95c5a2d8, 2020)
  * License: Public Domain or Unlicense or MIT
- `triangulator.{cpp,h}`
  * Upstream: https://github.com/ivanfratric/polypartition (`src/polypartition.cpp`)
  * Version: TBD, class was renamed
  * License: MIT
- `yuv2rgb.h`
  * Upstream: http://wss.co.uk/pinknoise/yuv2rgb/ (to check)
  * Version: ?
  * License: BSD


## nanosvg

- Upstream: https://github.com/memononen/nanosvg
- Version: git (3e403ec72a9145cbbcc6c63d94a4caf079aafec2, 2020)
- License: zlib

Files extracted from the upstream source:

- All .h files in `src/`
- LICENSE.txt


## opus

- Upstream: https://opus-codec.org
- Version: 1.1.5 (opus) and 0.8 (opusfile) (2017)
- License: BSD-3-Clause

Files extracted from upstream source:

- all .c and .h files in src/ (both opus and opusfile)
- all .h files in include/ (both opus and opusfile) as opus/
- remove unused `opus_demo.c`,
- remove `http.c`, `wincerts.c` and `winerrno.h` (part of
  unused libopusurl)
- celt/ and silk/ subfolders
- COPYING


## pcre2

- Upstream: http://www.pcre.org
- Version: 10.34 (r1189, 2019)
- License: BSD-3-Clause

Files extracted from upstream source:

- Files listed in the file NON-AUTOTOOLS-BUILD steps 1-4
- All .h files in src/ apart from pcre2posix.h
- src/pcre2_jit_match.c
- src/pcre2_jit_misc.c
- src/sljit/*
- AUTHORS and LICENCE


## pvrtccompressor

- Upstream: https://bitbucket.org/jthlim/pvrtccompressor (dead link)
  Unofficial backup fork: https://github.com/LibreGamesArchive/PVRTCCompressor
- Version: hg (cf7177748ee0dcdccfe89716dc11a47d2dc81af5, 2015)
- License: BSD-3-Clause

Files extracted from upstream source:

- all .cpp and .h files apart from `main.cpp`
- LICENSE.TXT


## recastnavigation

- Upstream: https://github.com/recastnavigation/recastnavigation
- Version: git (57610fa6ef31b39020231906f8c5d40eaa8294ae, 2019)
- License: zlib

Files extracted from upstream source:

- `Recast/` folder without `CMakeLists.txt`
- License.txt


## squish

- Upstream: https://sourceforge.net/projects/libsquish
- Version: 1.15 (r104, 2017)
- License: MIT

Files extracted from upstream source:

- all .cpp, .h and .inl files

Important: Some files have Godot-made changes.
They are marked with `// -- GODOT start --` and `// -- GODOT end --`
comments and a patch is provided in the squish/ folder.


## tinyexr

- Upstream: https://github.com/syoyo/tinyexr
- Version: 1.0.0 (e4b7840d9448b7d57a88384ce26143004f3c0c71, 2020)
- License: BSD-3-Clause

Files extracted from upstream source:

- `tinyexr.{cc,h}`


## vhacd

- Upstream: https://github.com/kmammou/v-hacd
- Version: git (b07958e18e01d504e3af80eeaeb9f033226533d7, 2019)
- License: BSD-3-Clause

Files extracted from upstream source:

- From `src/VHACD_Lib/`: `inc`, `public` and `src`
- `LICENSE`

Some downstream changes have been made and are identified by
`// -- GODOT start --` and `// -- GODOT end --` comments.
They can be reapplied using the patches included in the `vhacd`
folder.


## wslay

- Upstream: https://github.com/tatsuhiro-t/wslay
- Version: 1.1.1 (c9a84aa6df8512584c77c8cd15be9536b89c35aa, 2020)
- License: MIT

File extracted from upstream release tarball:

- All `*.c` and `*.h` in `lib/` and `lib/includes/`
- `wslay.h` has a small Godot addition to fix MSVC build.
  See `thirdparty/wslay/msvcfix.diff`


## xatlas

- Upstream: https://github.com/jpcy/xatlas
- Version: git (5571fc7ef0d06832947c0a935ccdcf083f7a9264, 2020)
- License: MIT

Files extracted from upstream source:

- `xatlas.{cpp,h}`
- `LICENSE`


## zlib

- Upstream: http://www.zlib.net
- Version: 1.2.11 (2017)
- License: zlib

Files extracted from upstream source:

- all .c and .h files


## zstd

- Upstream: https://github.com/facebook/zstd
- Version: 1.4.8 (97a3da1df009d4dc67251de0c4b1c9d7fe286fc1, 2020)
- License: BSD-3-Clause

Files extracted from upstream source:

- lib/{common/,compress/,decompress/,zstd.h}
- LICENSE