From 5005de06ceb34abb181b5dd03dacc6a6d70dc907 Mon Sep 17 00:00:00 2001
From: xuzhaozheng <xu.zhaozheng@qq.com>
Date: Wed, 25 Dec 2024 17:19:33 +0800
Subject: [PATCH] Change xyY_to_XYZ function to prevent negative floating point
 error in some cases.

Python Example:
1 - 0.680 - 0.320 = -5.551115123125783e-17;
1 - (0.680 + 0.320) = 0.0
---
 colour/models/cie_xyy.py | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/colour/models/cie_xyy.py b/colour/models/cie_xyy.py
index 1e17c0b62..d47cac2a2 100644
--- a/colour/models/cie_xyy.py
+++ b/colour/models/cie_xyy.py
@@ -149,7 +149,7 @@ def xyY_to_XYZ(xyY: ArrayLike) -> NDArrayFloat:
     with sdiv_mode():
         Y_y = sdiv(Y, y)
 
-    XYZ = tstack([x * Y_y, Y, (1 - x - y) * Y_y])
+    XYZ = tstack([x * Y_y, Y, (1 - (x + y)) * Y_y])
 
     return from_range_1(XYZ)