From 5553d614211998b5a10529f6b3ec68d2b25dc07a Mon Sep 17 00:00:00 2001
From: Dave Parks <davep@lindenlab.com>
Date: Fri, 22 Oct 2021 17:01:33 +0000
Subject: SL-16203 Fix for wonky handling of mouse deltas.

---
 indra/newview/llviewerwindow.cpp | 7 +++++++
 1 file changed, 7 insertions(+)

(limited to 'indra/newview/llviewerwindow.cpp')

diff --git a/indra/newview/llviewerwindow.cpp b/indra/newview/llviewerwindow.cpp
index 82ece85c1b..ce73037006 100644
--- a/indra/newview/llviewerwindow.cpp
+++ b/indra/newview/llviewerwindow.cpp
@@ -3781,8 +3781,15 @@ void LLViewerWindow::updateLayout()
 
 void LLViewerWindow::updateMouseDelta()
 {
+#if LL_WINDOWS
+    LLCoordCommon delta; 
+    mWindow->getCursorDelta(&delta);
+    S32 dx = delta.mX;
+    S32 dy = delta.mY;
+#else
 	S32 dx = lltrunc((F32) (mCurrentMousePoint.mX - mLastMousePoint.mX) * LLUI::getScaleFactor().mV[VX]);
 	S32 dy = lltrunc((F32) (mCurrentMousePoint.mY - mLastMousePoint.mY) * LLUI::getScaleFactor().mV[VY]);
+#endif
 
 	//RN: fix for asynchronous notification of mouse leaving window not working
 	LLCoordWindow mouse_pos;
-- 
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