2 files changed, 27 insertions, 0 deletions
diff --git a/src/plugins/platforms/cocoa/qcocoascreen.h b/src/plugins/platforms/cocoa/qcocoascreen.h
index 1ff9cddd5b5..4898255e022 100644
--- a/src/plugins/platforms/cocoa/qcocoascreen.h
+++ b/src/plugins/platforms/cocoa/qcocoascreen.h
@@ -66,6 +66,8 @@ private:
     static void updateScreens();
     static void cleanupScreens();
 
+    static void updateHdrWindows();
+
     static QMacNotificationObserver s_screenParameterObserver;
     static CGDisplayReconfigurationCallBack s_displayReconfigurationCallBack;
 
diff --git a/src/plugins/platforms/cocoa/qcocoascreen.mm b/src/plugins/platforms/cocoa/qcocoascreen.mm
index ba6bda0f8ca..d8b9601f5d1 100644
--- a/src/plugins/platforms/cocoa/qcocoascreen.mm
+++ b/src/plugins/platforms/cocoa/qcocoascreen.mm
@@ -64,6 +64,10 @@ void QCocoaScreen::initializeScreens()
         NSApplicationDidChangeScreenParametersNotification, [&]() {
             qCDebug(lcQpaScreen) << "Received screen parameter change notification";
             updateScreens();
+
+            // The notification is posted when the EDR headroom of a display changes,
+            // which might affect the rendering of windows that opt in to EDR.
+            updateHdrWindows();
         });
 }
 
@@ -500,6 +504,27 @@ void QCocoaScreen::maybeStopDisplayLink()
     CVDisplayLinkStop(m_displayLink);
 }
 
+
+// -----------------------------------------------------------
+
+void QCocoaScreen::updateHdrWindows()
+{
+    if (@available(macOS 14, *)) {
+        for (auto *window : QGuiApplication::allWindows()) {
+            auto *platformWindow = static_cast<QCocoaWindow*>(window->handle());
+            if (!platformWindow)
+                continue;
+
+            NSView *view = platformWindow->view();
+
+            if (!view.layer.wantsExtendedDynamicRangeContent)
+                continue;
+
+            [view setNeedsDisplay:YES];
+        }
+    }
+}
+
 // -----------------------------------------------------------
 
 QPlatformScreen::SubpixelAntialiasingType QCocoaScreen::subpixelAntialiasingTypeHint() const