From 3aaf34b677ad3841d6e0f541399b866e23f30b61 Mon Sep 17 00:00:00 2001
From: Luna Lovecraft <ciubix8514@gmail.com>
Date: Thu, 10 Sep 2026 22:18:13 +0400
Subject: [PATCH] Fix a crash in the color space browser on qt 6.11

Some of the color space data includes a few NaNs, which when transformed
it leads to insane values, which makes the qpainter crash in the newer
qt version.

So now there are a few NaN checks to avoid that.
---
 libs/ui/widgets/kis_cie_tongue_widget.cpp | 24 +++++++++++++++++------
 1 file changed, 18 insertions(+), 6 deletions(-)

diff --git a/libs/ui/widgets/kis_cie_tongue_widget.cpp b/libs/ui/widgets/kis_cie_tongue_widget.cpp
index f83066bea85..e7fb6a835e1 100644
--- a/libs/ui/widgets/kis_cie_tongue_widget.cpp
+++ b/libs/ui/widgets/kis_cie_tongue_widget.cpp
@@ -178,6 +178,12 @@ void KisCIETongueWidget::setProfileData(QVector <double> p, QVector <double> w,
     d->profileDataAvailable = profileData;
     if (profileData){
         d->Primaries= p;
+
+        for (int i = 0; i < d->Primaries.size(); i++) {
+            if (std::isnan(d->Primaries[i])) {
+                d->Primaries[i] = 0;
+            }
+        }
         
         d->whitePoint = w;
         d->needUpdatePixmap = true;      
@@ -193,7 +199,13 @@ void KisCIETongueWidget::setRGBData(QVector <double> whitepoint, QVector <double
 {
     if (colorants.size()==9){
         d->Primaries= colorants;
-        
+
+        for (int i = 0; i < d->Primaries.size(); i++) {
+            if (std::isnan(d->Primaries[i])) {
+                d->Primaries[i] = 0;
+            }
+        }
+
         d->whitePoint = whitepoint;
         d->needUpdatePixmap = true;
         d->colorModel = KisCIETongueWidget::RGBA;
@@ -543,14 +555,14 @@ void KisCIETongueWidget::drawGamut()
         gamutPaint.drawPath(path);
         gamutPaint.setOpacity(1.0);
         foreach (QPointF Point, d->gamut) {
+            if (std::isnan(Point.x()) || std::isnan(Point.y())) {
+                continue;
+            }
             mapPoint(x, y, Point);
-            gamutPaint.drawEllipse(x + d->xBias- 2, y-2, 4, 4);
-            //Point.setX(x);
-            //Point.setY(y);
-            //path.lineTo(Point);
+            gamutPaint.drawEllipse(x + d->xBias - 2, y - 2, 4, 4);
         }
     }
-    
+
     gamutPaint.end();
     d->painter.save();
     d->painter.setOpacity(0.5);
-- 
GitLab