thirdparty: Cleanup after #38386, document provenance and copyright

Also renamed `delaunay.h` to `delaunay_2d.h` to match the class name.

6 files changed, 227 insertions, 7 deletions

diff --git a/thirdparty/README.md b/thirdparty/README.md
index e51e7d7f24..c000133fe7 100644
--- a/thirdparty/README.md
+++ b/thirdparty/README.md
@@ -384,11 +384,19 @@ Collection of single-file libraries used in Godot components.
   * Upstream: http://www.pcg-random.org
   * Version: minimal C implementation, http://www.pcg-random.org/download.html
   * License: Apache 2.0
+- `r128.h`
+  * Upstream: https://github.com/fahickman/r128
+  * Version: 1.4.3 (2019)
+  * License: Public Domain
 - `smaz.{c,h}`
   * Upstream: https://github.com/antirez/smaz
   * Version: git (150e125cbae2e8fd20dd332432776ce13395d4d4, 2009)
   * License: BSD-3-Clause
   * Modifications: use `const char*` instead of `char*` for input string
+- `stb_rect_pack.h`
+  * Upstream: https://github.com/nothings/stb
+  * Version: 1.00 (2019)
+  * License: Public Domain (Unlicense) or MIT
 - `triangulator.{cpp,h}`
   * Upstream: https://github.com/ivanfratric/polypartition (`src/polypartition.cpp`)
   * Version: TBD, class was renamed
@@ -437,6 +445,17 @@ Files extracted from the upstream source:
 - LICENSE.txt
 
 
+## oidn
+
+- Upstream: https://github.com/OpenImageDenoise/oidn
+- Version: TBD
+- License: Apache 2.0
+
+Files extracted from upstream source:
+
+- TBD
+
+
 ## opus
 
 - Upstream: https://opus-codec.org
diff --git a/thirdparty/misc/r128.c b/thirdparty/misc/r128.c
new file mode 100644
index 0000000000..6b981aa693
--- /dev/null
+++ b/thirdparty/misc/r128.c
@@ -0,0 +1,2 @@
+#define R128_IMPLEMENTATION
+#include "r128.h"
diff --git a/thirdparty/r128/r128.h b/thirdparty/misc/r128.h
index 58933d7638..be7cd3024d 100644
--- a/thirdparty/r128/r128.h
+++ b/thirdparty/misc/r128.h
@@ -77,7 +77,7 @@ OTHER DEALINGS IN THE SOFTWARE.
 #  define R128_S32 int32_t
 #  define R128_U32 uint32_t
 #  define R128_S64 int64_t
-#  define R128_U64 long long unsigned int
+#  define R128_U64 uint64_t
 #  define R128_LIT_S64(x) x##ll
 #  define R128_LIT_U64(x) x##ull
 #endif
@@ -703,12 +703,12 @@ static R128_U32 r128__udiv64(R128_U32 nlo, R128_U32 nhi, R128_U32 d, R128_U32 *r
 }
 #elif !defined(_M_X64) || defined(R128_STDC_ONLY)
 #define r128__umul64(a, b) ((a) * (R128_U64)(b))
-/*static R128_U32 r128__udiv64(R128_U32 nlo, R128_U32 nhi, R128_U32 d, R128_U32 *rem)
+static R128_U32 r128__udiv64(R128_U32 nlo, R128_U32 nhi, R128_U32 d, R128_U32 *rem)
 {
    R128_U64 n64 = ((R128_U64)nhi << 32) | nlo;
    *rem = (R128_U32)(n64 % d);
    return (R128_U32)(n64 / d);
-}*/
+}
 #endif   //!R128_64BIT
 
 static void r128__neg(R128 *dst, const R128 *src)
@@ -1188,7 +1188,7 @@ static int r128__format(char *dst, size_t dstSize, const R128 *v, const R128ToSt
       // print a maximum of 20 digits
       fullPrecision = 0;
       precision = 20;
-   } else if (precision > (int)sizeof(buf) - 21) {
+   } else if (precision > sizeof(buf) - 21) {
       trail = precision - (sizeof(buf) - 21);
       precision -= trail;
    }
@@ -2121,4 +2121,3 @@ void r128Ceil(R128 *dst, const R128 *v)
 }
 
 #endif   //R128_IMPLEMENTATION
-
diff --git a/thirdparty/stb_rect_pack/stb_rect_pack.h b/thirdparty/misc/stb_rect_pack.h
index 3336fe7395..5c848de0e7 100644
--- a/thirdparty/stb_rect_pack/stb_rect_pack.h
+++ b/thirdparty/misc/stb_rect_pack.h
@@ -626,4 +626,3 @@ 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.
 ------------------------------------------------------------------------------
 */
-
diff --git a/thirdparty/oidn/.gitignore b/thirdparty/oidn/.gitignore
deleted file mode 100644
index 6be206fc29..0000000000
--- a/thirdparty/oidn/.gitignore
+++ /dev/null
@@ -1 +0,0 @@
-weights/rtlightmap_hdr.cpp
diff --git a/thirdparty/oidn/LICENSE.txt b/thirdparty/oidn/LICENSE.txt
new file mode 100644
index 0000000000..d645695673
--- /dev/null
+++ b/thirdparty/oidn/LICENSE.txt
@@ -0,0 +1,202 @@
+
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