From 724e3cca96422f480d5cff912e764da82c5de03c Mon Sep 17 00:00:00 2001
From: AndreyL ProductEngine <alihatskiy@productengine.com>
Date: Thu, 11 Apr 2019 00:19:58 +0300
Subject: SL-10891 Reset UI scale factor on first run if OS's display scaling
 is not 100%

---
 indra/newview/app_settings/settings.xml | 11 +++++++++++
 indra/newview/llviewerwindow.cpp        | 10 ++++++++++
 2 files changed, 21 insertions(+)

(limited to 'indra')

diff --git a/indra/newview/app_settings/settings.xml b/indra/newview/app_settings/settings.xml
index 1173abf18e..7b69ec6eb2 100644
--- a/indra/newview/app_settings/settings.xml
+++ b/indra/newview/app_settings/settings.xml
@@ -16288,6 +16288,17 @@
       <key>Value</key>
       <integer>0</integer>
     </map>
+    <key>ResetUIScaleOnFirstRun</key>
+    <map>
+      <key>Comment</key>
+      <string>Resets the UI scale factor on first run due to changed display scaling behavior</string>
+      <key>Persist</key>
+      <integer>1</integer>
+      <key>Type</key>
+      <string>Boolean</string>
+      <key>Value</key>
+      <integer>1</integer>        
+    </map>
 </map>
 </llsd>
 
diff --git a/indra/newview/llviewerwindow.cpp b/indra/newview/llviewerwindow.cpp
index cc10d08f3a..5b764f97fb 100644
--- a/indra/newview/llviewerwindow.cpp
+++ b/indra/newview/llviewerwindow.cpp
@@ -1763,6 +1763,16 @@ LLViewerWindow::LLViewerWindow(const Params& p)
 	LLCoordScreen scr;
     mWindow->getSize(&scr);
 
+    // Reset UI scale factor on first run if OS's display scaling is not 100%
+    if (gSavedSettings.getBOOL("ResetUIScaleOnFirstRun"))
+    {
+        if (mWindow->getSystemUISize() != 1.f)
+        {
+            gSavedSettings.setF32("UIScaleFactor", 1.f);
+        }
+        gSavedSettings.setBOOL("ResetUIScaleOnFirstRun", FALSE);
+    }
+
 	// Get the real window rect the window was created with (since there are various OS-dependent reasons why
 	// the size of a window or fullscreen context may have been adjusted slightly...)
 	F32 ui_scale_factor = llclamp(gSavedSettings.getF32("UIScaleFactor"), MIN_UI_SCALE, MAX_UI_SCALE) * mWindow->getSystemUISize();
-- 
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