Merge branch 'project/mac_universal' into callum/viewer-cef-2025-08

10 files changed, 136 insertions, 218 deletions

diff --git a/indra/llwindow/CMakeLists.txt b/indra/llwindow/CMakeLists.txt
index 5bfac34ca5..08b3df87ab 100644
--- a/indra/llwindow/CMakeLists.txt
+++ b/indra/llwindow/CMakeLists.txt
@@ -63,8 +63,8 @@ set(llwindow_LINK_LIBRARIES
 # Libraries on which this library depends, needed for Linux builds
 # Sort by high-level to low-level
 if (LINUX)
-  list(APPEND viewer_SOURCE_FILES 
-       llkeyboardsdl.cpp 
+  list(APPEND viewer_SOURCE_FILES
+       llkeyboardsdl.cpp
        llwindowsdl.cpp
        )
   list(APPEND viewer_HEADER_FILES
@@ -107,7 +107,7 @@ if (DARWIN)
       llkeyboardmacosx.cpp
       llwindowmacosx.cpp
       PROPERTIES
-      COMPILE_FLAGS "-Wno-deprecated-declarations -fpascal-strings"
+      COMPILE_FLAGS "-fpascal-strings"
       )
 endif (DARWIN)
 
@@ -180,8 +180,7 @@ endif (SDL_FOUND)
 
   target_link_libraries (llwindow ${llwindow_LINK_LIBRARIES})
   target_include_directories(llwindow INTERFACE ${CMAKE_CURRENT_SOURCE_DIR})
-  
+
 if (DARWIN)
-  find_library(CARBON_LIBRARY Carbon)
   target_link_libraries(llwindow ${CARBON_LIBRARY})
 endif (DARWIN)
diff --git a/indra/llwindow/lldxhardware.cpp b/indra/llwindow/lldxhardware.cpp
index 387982dfc2..ff85b2cb14 100644
--- a/indra/llwindow/lldxhardware.cpp
+++ b/indra/llwindow/lldxhardware.cpp
@@ -312,7 +312,7 @@ std::string get_string(IDxDiagContainer *containerp, const WCHAR *wszPropName)
     WCHAR wszPropValue[256];
     get_wstring(containerp, wszPropName, wszPropValue, 256);
 
-    return utf16str_to_utf8str(wszPropValue);
+    return ll_convert<std::string>(std::wstring(wszPropValue));
 }
 
 LLDXHardware::LLDXHardware()
@@ -440,7 +440,7 @@ LLSD LLDXHardware::getDisplayInfo()
                     // print the value
                     // windows doesn't guarantee to be null terminated
                     release_version[RV_SIZE - 1] = NULL;
-                    ret["DriverVersion"] = utf16str_to_utf8str(release_version);
+                    ret["DriverVersion"] = ll_convert<std::string>(std::wstring(release_version));
 
                 }
                 RegCloseKey(hKey);
diff --git a/indra/llwindow/llopenglview-objc.h b/indra/llwindow/llopenglview-objc.h
index 97f4125484..028549b82e 100644
--- a/indra/llwindow/llopenglview-objc.h
+++ b/indra/llwindow/llopenglview-objc.h
@@ -42,7 +42,6 @@
     unsigned int mMarkedTextLength;
     bool mMarkedTextAllowed;
     bool mSimulatedRightClick;
-    bool mOldResize;
 }
 - (id) initWithSamples:(NSUInteger)samples;
 - (id) initWithSamples:(NSUInteger)samples andVsync:(BOOL)vsync;
@@ -50,8 +49,6 @@
 
 - (void)commitCurrentPreedit;
 
-- (void) setOldResize:(bool)oldresize;
-
 // rebuildContext
 // Destroys and recreates a context with the view's internal format set via setPixelFormat;
 // Use this in event of needing to rebuild a context for whatever reason, without needing to assign a new pixel format.
@@ -68,7 +65,6 @@
 - (unsigned long) getVramSize;
 
 - (void) allowMarkedTextInput:(bool)allowed;
-- (void) viewDidEndLiveResize;
 
 @end
 
@@ -88,9 +84,6 @@
 
 @interface LLNSWindow : NSWindow
 
-- (NSPoint)convertToScreenFromLocalPoint:(NSPoint)point relativeToView:(NSView *)view;
-- (NSPoint)flipPoint:(NSPoint)aPoint;
-
 @end
 
 @interface NSScreen (PointConversion)
@@ -100,16 +93,6 @@
  */
 + (NSScreen *)currentScreenForMouseLocation;
 
-/*
- Allows you to convert a point from global coordinates to the current screen coordinates.
- */
-- (NSPoint)convertPointToScreenCoordinates:(NSPoint)aPoint;
-
-/*
- Allows to flip the point coordinates, so y is 0 at the top instead of the bottom. x remains the same
- */
-- (NSPoint)flipPoint:(NSPoint)aPoint;
-
 @end
 
 #endif
diff --git a/indra/llwindow/llopenglview-objc.mm b/indra/llwindow/llopenglview-objc.mm
index 937c3c7a6e..f3aa164f92 100644
--- a/indra/llwindow/llopenglview-objc.mm
+++ b/indra/llwindow/llopenglview-objc.mm
@@ -28,6 +28,8 @@
 #import "llwindowmacosx-objc.h"
 #import "llappdelegate-objc.h"
 
+#import <Carbon/Carbon.h> 
+
 extern BOOL gHiDPISupport;
 
 #pragma mark local functions
@@ -105,34 +107,10 @@ attributedStringInfo getSegments(NSAttributedString *str)
     return screen;
 }
 
-
-- (NSPoint)convertPointToScreenCoordinates:(NSPoint)aPoint
-{
-    float normalizedX = fabs(fabs(self.frame.origin.x) - fabs(aPoint.x));
-    float normalizedY = aPoint.y - self.frame.origin.y;
-    
-    return NSMakePoint(normalizedX, normalizedY);
-}
-
-- (NSPoint)flipPoint:(NSPoint)aPoint
-{
-    return NSMakePoint(aPoint.x, self.frame.size.height - aPoint.y);
-}
-
 @end
 
 @implementation LLOpenGLView
 
-// Force a high quality update after live resizing
-- (void) viewDidEndLiveResize
-{
-    if (mOldResize)  //Maint-3135
-    {
-        NSSize size = [self frame].size;
-        callResize(size.width, size.height);
-    }
-}
-
 - (unsigned long)getVramSize
 {
     CGLRendererInfoObj info = 0;
@@ -187,18 +165,10 @@ attributedStringInfo getSegments(NSAttributedString *str)
     }
 }
 
-- (void)setOldResize:(bool)oldresize
-{
-    mOldResize = oldresize;
-}
-
 - (void)windowResized:(NSNotification *)notification;
 {
-    if (!mOldResize)  //Maint-3288
-    {
-        NSSize dev_sz = gHiDPISupport ? [self convertSizeToBacking:[self frame].size] : [self frame].size;
-        callResize(dev_sz.width, dev_sz.height);
-    }
+    NSSize dev_sz = [self convertSizeToBacking:[self frame].size];
+    callResize(dev_sz.width, dev_sz.height);
 }
 
 - (void)windowWillMiniaturize:(NSNotification *)notification;
@@ -242,9 +212,15 @@ attributedStringInfo getSegments(NSAttributedString *str)
 	return [self initWithFrame:[self bounds] withSamples:samples andVsync:vsync];
 }
 
+#if LL_DARWIN
+// For setView and opengl deprecation
+#pragma clang diagnostic push
+#pragma clang diagnostic ignored "-Wdeprecated-declarations"
+#endif
+
 - (id) initWithFrame:(NSRect)frame withSamples:(NSUInteger)samples andVsync:(BOOL)vsync
 {
-	[self registerForDraggedTypes:[NSArray arrayWithObject:NSURLPboardType]];
+    [self registerForDraggedTypes:[NSArray arrayWithObject:NSPasteboardTypeURL]];
 	[self initWithFrame:frame];
 	
 	// Initialize with a default "safe" pixel format that will work with versions dating back to OS X 10.6.
@@ -255,8 +231,8 @@ attributedStringInfo getSegments(NSAttributedString *str)
 		NSOpenGLPFADoubleBuffer,
 		NSOpenGLPFAClosestPolicy,
 		NSOpenGLPFAAccelerated,
-		NSOpenGLPFASampleBuffers, static_cast<NSOpenGLPixelFormatAttribute>(samples > 0 ? 1 : 0),
-		NSOpenGLPFASamples, static_cast<NSOpenGLPixelFormatAttribute>(samples),
+		NSOpenGLPFASampleBuffers, 0,
+		NSOpenGLPFASamples, 0,
 		NSOpenGLPFAStencilSize, 8,
 		NSOpenGLPFADepthSize, 24,
 		NSOpenGLPFAAlphaSize, 8,
@@ -295,17 +271,15 @@ attributedStringInfo getSegments(NSAttributedString *str)
 	if (vsync)
 	{
 		GLint value = 1;
-		[glContext setValues:&value forParameter:NSOpenGLCPSwapInterval];
+        [glContext setValues:&value forParameter:NSOpenGLContextParameterSwapInterval];
 	} else {
 		// supress this error after move to Xcode 7:
 		// error: null passed to a callee that requires a non-null argument [-Werror,-Wnonnull]
 		// Tried using ObjC 'nonnull' keyword as per SO article but didn't build
 		GLint swapInterval=0;
-		[glContext setValues:&swapInterval forParameter:NSOpenGLCPSwapInterval];
+        [glContext setValues:&swapInterval forParameter:NSOpenGLContextParameterSwapInterval];
 	}
-	
-    mOldResize = false;
-    
+
 	return self;
 }
 
@@ -333,6 +307,10 @@ attributedStringInfo getSegments(NSAttributedString *str)
 	return true;
 }
 
+#if LL_DARWIN
+#pragma clang diagnostic pop
+#endif
+
 - (CGLContextObj)getCGLContextObj
 {
 	NSOpenGLContext *ctx = [self openGLContext];
@@ -350,18 +328,14 @@ attributedStringInfo getSegments(NSAttributedString *str)
 
 - (void) mouseDown:(NSEvent *)theEvent
 {
-    NSPoint mPoint = gHiDPISupport ? [self convertPointToBacking:[theEvent locationInWindow]] : [theEvent locationInWindow];
-    mMousePos[0] = mPoint.x;
-    mMousePos[1] = mPoint.y;
-
     // Apparently people still use this?
-    if ([theEvent modifierFlags] & NSCommandKeyMask &&
-        !([theEvent modifierFlags] & NSControlKeyMask) &&
-        !([theEvent modifierFlags] & NSShiftKeyMask) &&
-        !([theEvent modifierFlags] & NSAlternateKeyMask) &&
-        !([theEvent modifierFlags] & NSAlphaShiftKeyMask) &&
-        !([theEvent modifierFlags] & NSFunctionKeyMask) &&
-        !([theEvent modifierFlags] & NSHelpKeyMask))
+    if ([theEvent modifierFlags] & NSEventModifierFlagCommand &&
+        !([theEvent modifierFlags] & NSEventModifierFlagControl) &&
+        !([theEvent modifierFlags] & NSEventModifierFlagShift) &&
+        !([theEvent modifierFlags] & NSEventModifierFlagOption) &&
+        !([theEvent modifierFlags] & NSEventModifierFlagCapsLock) &&
+        !([theEvent modifierFlags] & NSEventModifierFlagFunction) &&
+        !([theEvent modifierFlags] & NSEventModifierFlagHelp))
     {
         callRightMouseDown(mMousePos, [theEvent modifierFlags]);
         mSimulatedRightClick = true;
@@ -382,7 +356,7 @@ attributedStringInfo getSegments(NSAttributedString *str)
         callRightMouseUp(mMousePos, [theEvent modifierFlags]);
         mSimulatedRightClick = false;
     } else {
-        NSPoint mPoint = gHiDPISupport ? [self convertPointToBacking:[theEvent locationInWindow]] : [theEvent locationInWindow];
+        NSPoint mPoint = [self convertPointToBacking:[theEvent locationInWindow]];
         mMousePos[0] = mPoint.x;
         mMousePos[1] = mPoint.y;
         callLeftMouseUp(mMousePos, [theEvent modifierFlags]);
@@ -391,32 +365,26 @@ attributedStringInfo getSegments(NSAttributedString *str)
 
 - (void) rightMouseDown:(NSEvent *)theEvent
 {
-    NSPoint mPoint = gHiDPISupport ? [self convertPointToBacking:[theEvent locationInWindow]] : [theEvent locationInWindow];
-    mMousePos[0] = mPoint.x;
-    mMousePos[1] = mPoint.y;
 	callRightMouseDown(mMousePos, [theEvent modifierFlags]);
 }
 
 - (void) rightMouseUp:(NSEvent *)theEvent
 {
-    NSPoint mPoint = gHiDPISupport ? [self convertPointToBacking:[theEvent locationInWindow]] : [theEvent locationInWindow];
-    mMousePos[0] = mPoint.x;
-    mMousePos[1] = mPoint.y;
 	callRightMouseUp(mMousePos, [theEvent modifierFlags]);
 }
 
 - (void)mouseMoved:(NSEvent *)theEvent
 {
-    NSPoint dev_delta = gHiDPISupport ? [self convertPointToBacking:NSMakePoint([theEvent deltaX], [theEvent deltaY])] : NSMakePoint([theEvent deltaX], [theEvent deltaY]);
+    NSPoint dev_delta = [self convertPointToBacking:NSMakePoint([theEvent deltaX], [theEvent deltaY])];
 
 	float mouseDeltas[] = {
 		float(dev_delta.x),
 		float(dev_delta.y)
 	};
-	
+
 	callDeltaUpdate(mouseDeltas, 0);
-	
-    NSPoint mPoint = gHiDPISupport ? [self convertPointToBacking:[theEvent locationInWindow]] : [theEvent locationInWindow];
+
+    NSPoint mPoint = [self convertPointToBacking:[theEvent locationInWindow]];
 	mMousePos[0] = mPoint.x;
 	mMousePos[1] = mPoint.y;
 	callMouseMoved(mMousePos, 0);
@@ -431,7 +399,7 @@ attributedStringInfo getSegments(NSAttributedString *str)
 	// The old CoreGraphics APIs we previously relied on are now flagged as obsolete.
 	// NSEvent isn't obsolete, and provides us with the correct deltas.
 
-    NSPoint dev_delta = gHiDPISupport ? [self convertPointToBacking:NSMakePoint([theEvent deltaX], [theEvent deltaY])] : NSMakePoint([theEvent deltaX], [theEvent deltaY]);
+    NSPoint dev_delta = [self convertPointToBacking:NSMakePoint([theEvent deltaX], [theEvent deltaY])];
 
 	float mouseDeltas[] = {
 		float(dev_delta.x),
@@ -440,7 +408,7 @@ attributedStringInfo getSegments(NSAttributedString *str)
 	
 	callDeltaUpdate(mouseDeltas, 0);
 	
-	NSPoint mPoint = gHiDPISupport ? [self convertPointToBacking:[theEvent locationInWindow]] : [theEvent locationInWindow];
+	NSPoint mPoint = [self convertPointToBacking:[theEvent locationInWindow]];
 	mMousePos[0] = mPoint.x;
 	mMousePos[1] = mPoint.y;
 	callMouseDragged(mMousePos, 0);
@@ -448,17 +416,11 @@ attributedStringInfo getSegments(NSAttributedString *str)
 
 - (void) otherMouseDown:(NSEvent *)theEvent
 {
-    NSPoint mPoint = gHiDPISupport ? [self convertPointToBacking:[theEvent locationInWindow]] : [theEvent locationInWindow];
-    mMousePos[0] = mPoint.x;
-    mMousePos[1] = mPoint.y;
     callOtherMouseDown(mMousePos, [theEvent modifierFlags], [theEvent buttonNumber]);
 }
 
 - (void) otherMouseUp:(NSEvent *)theEvent
 {
-    NSPoint mPoint = gHiDPISupport ? [self convertPointToBacking:[theEvent locationInWindow]] : [theEvent locationInWindow];
-    mMousePos[0] = mPoint.x;
-    mMousePos[1] = mPoint.y;
     callOtherMouseUp(mMousePos, [theEvent modifierFlags], [theEvent buttonNumber]);
 }
 
@@ -511,7 +473,7 @@ attributedStringInfo getSegments(NSAttributedString *str)
 
     if (acceptsText &&
         !mMarkedTextAllowed &&
-        !(mModifiers & (NSControlKeyMask | NSCommandKeyMask)) &&  // commands don't invoke InputWindow
+        !(mModifiers & (NSEventModifierFlagControl | NSEventModifierFlagCommand)) &&  // commands don't invoke InputWindow
         ![(LLAppDelegate*)[NSApp delegate] romanScript] &&
         ch > ' ' &&
         ch != NSDeleteCharacter &&
@@ -534,14 +496,14 @@ attributedStringInfo getSegments(NSAttributedString *str)
     NSInteger mask = 0;
     switch([theEvent keyCode])
     {        
-        case 56:
-            mask = NSShiftKeyMask;
+        case kVK_Shift:
+            mask = NSEventModifierFlagShift;
             break;
-        case 58:
-            mask = NSAlternateKeyMask;
+        case kVK_Option:
+            mask = NSEventModifierFlagOption;
             break;
-        case 59:
-            mask = NSControlKeyMask;
+        case kVK_Control:
+            mask = NSEventModifierFlagControl;
             break;
         default:
             return;            
@@ -582,7 +544,7 @@ attributedStringInfo getSegments(NSAttributedString *str)
 	
 	pboard = [sender draggingPasteboard];
 	
-	if ([[pboard types] containsObject:NSURLPboardType])
+    if ([[pboard types] containsObject:NSPasteboardTypeURL])
 	{
 		if (sourceDragMask & NSDragOperationLink) {
 			NSURL *fileUrl = [[pboard readObjectsForClasses:[NSArray arrayWithObject:[NSURL class]] options:[NSDictionary dictionary]] objectAtIndex:0];
@@ -695,6 +657,12 @@ attributedStringInfo getSegments(NSAttributedString *str)
     }
 }
 
+#if LL_DARWIN
+// For commitEditing deprecation
+#pragma clang diagnostic push
+#pragma clang diagnostic ignored "-Wdeprecated-declarations"
+#endif
+
 - (void)commitCurrentPreedit
 {
     if (mHasMarkedText)
@@ -706,6 +674,10 @@ attributedStringInfo getSegments(NSAttributedString *str)
     }
 }
 
+#if LL_DARWIN
+#pragma clang diagnostic pop
+#endif
+
 - (void)unmarkText
 {
 	[[self inputContext] discardMarkedText];
@@ -785,9 +757,9 @@ attributedStringInfo getSegments(NSAttributedString *str)
 
 - (void) insertNewline:(id)sender
 {
-	if (!(mModifiers & NSCommandKeyMask) &&
-		!(mModifiers & NSShiftKeyMask) &&
-		!(mModifiers & NSAlternateKeyMask))
+    if (!(mModifiers & NSEventModifierFlagCommand) &&
+        !(mModifiers & NSEventModifierFlagShift) &&
+        !(mModifiers & NSEventModifierFlagOption))
 	{
 		callUnicodeCallback(13, 0);
 	} else {
@@ -906,27 +878,6 @@ attributedStringInfo getSegments(NSAttributedString *str)
 	return self;
 }
 
-- (NSPoint)convertToScreenFromLocalPoint:(NSPoint)point relativeToView:(NSView *)view
-{
-	NSScreen *currentScreen = [NSScreen currentScreenForMouseLocation];
-	if(currentScreen)
-	{
-		NSPoint windowPoint = [view convertPoint:point toView:nil];
-		NSPoint screenPoint = [[view window] convertBaseToScreen:windowPoint];
-		NSPoint flippedScreenPoint = [currentScreen flipPoint:screenPoint];
-		flippedScreenPoint.y += [currentScreen frame].origin.y;
-		
-		return flippedScreenPoint;
-	}
-	
-	return NSZeroPoint;
-}
-
-- (NSPoint)flipPoint:(NSPoint)aPoint
-{
-    return NSMakePoint(aPoint.x, self.frame.size.height - aPoint.y);
-}
-
 - (BOOL) becomeFirstResponder
 {
 	callFocus();
diff --git a/indra/llwindow/llwindow.h b/indra/llwindow/llwindow.h
index 151028113a..d0fa16b26a 100644
--- a/indra/llwindow/llwindow.h
+++ b/indra/llwindow/llwindow.h
@@ -147,7 +147,6 @@ public:
     virtual void swapBuffers() = 0;
     virtual void bringToFront() = 0;
     virtual void focusClient() { };     // this may not have meaning or be required on other platforms, therefore, it's not abstract
-    virtual void setOldResize(bool oldresize) { };
     // handy coordinate space conversion routines
     // NB: screen to window and vice verse won't work on width/height coordinate pairs,
     // as the conversion must take into account left AND right border widths, etc.
diff --git a/indra/llwindow/llwindowmacosx-objc.h b/indra/llwindow/llwindowmacosx-objc.h
index d9d8bfce1f..b302a705da 100644
--- a/indra/llwindow/llwindowmacosx-objc.h
+++ b/indra/llwindow/llwindowmacosx-objc.h
@@ -100,7 +100,6 @@ bool isCGCursorVisible();
 void hideNSCursorTillMove(bool hide);
 void requestUserAttention();
 long showAlert(std::string title, std::string text, int type);
-void setResizeMode(bool oldresize, void* glview);
 
 NSWindowRef createNSWindow(int x, int y, int width, int height);
 
@@ -111,16 +110,14 @@ void glSwapBuffers(void* context);
 CGLContextObj getCGLContextObj(GLViewRef view);
 unsigned long getVramSize(GLViewRef view);
 float getDeviceUnitSize(GLViewRef view);
-CGPoint getContentViewBoundsPosition(NSWindowRef window);
-CGSize getContentViewBoundsSize(NSWindowRef window);
-CGSize getDeviceContentViewSize(NSWindowRef window, GLViewRef view);
+CGRect getContentViewRect(NSWindowRef window);
+CGRect getBackingViewRect(NSWindowRef window, GLViewRef view);
 void getWindowSize(NSWindowRef window, float* size);
 void setWindowSize(NSWindowRef window, int width, int height);
 void getCursorPos(NSWindowRef window, float* pos);
 void makeWindowOrderFront(NSWindowRef window);
 void convertScreenToWindow(NSWindowRef window, float *coord);
 void convertWindowToScreen(NSWindowRef window, float *coord);
-void convertScreenToView(NSWindowRef window, float *coord);
 void convertRectToScreen(NSWindowRef window, float *coord);
 void convertRectFromScreen(NSWindowRef window, float *coord);
 void setWindowPos(NSWindowRef window, float* pos);
diff --git a/indra/llwindow/llwindowmacosx-objc.mm b/indra/llwindow/llwindowmacosx-objc.mm
index 2e75d309ea..42cd95be5d 100644
--- a/indra/llwindow/llwindowmacosx-objc.mm
+++ b/indra/llwindow/llwindowmacosx-objc.mm
@@ -162,11 +162,21 @@ void showNSCursor()
 	[NSCursor unhide];
 }
 
+#if LL_DARWIN
+// For CGCursorIsVisible no replacement in modern API
+#pragma clang diagnostic push
+#pragma clang diagnostic ignored "-Wdeprecated-declarations"
+#endif
+
 bool isCGCursorVisible()
 {
     return CGCursorIsVisible();
 }
 
+#if LL_DARWIN
+#pragma clang diagnostic pop
+#endif
+
 void hideNSCursorTillMove(bool hide)
 {
 	[NSCursor setHiddenUntilMouseMoves:hide];
@@ -213,7 +223,8 @@ OSErr setImageCursor(CursorRef ref)
 NSWindowRef createNSWindow(int x, int y, int width, int height)
 {
 	LLNSWindow *window = [[LLNSWindow alloc]initWithContentRect:NSMakeRect(x, y, width, height)
-													  styleMask:NSTitledWindowMask | NSResizableWindowMask | NSClosableWindowMask | NSMiniaturizableWindowMask | NSTexturedBackgroundWindowMask backing:NSBackingStoreBuffered defer:NO];
+                                                      styleMask:NSWindowStyleMaskTitled | NSWindowStyleMaskResizable | NSWindowStyleMaskClosable | NSWindowStyleMaskMiniaturizable
+                                                        backing:NSBackingStoreBuffered defer:NO];
 	[window makeKeyAndOrderFront:nil];
 	[window setAcceptsMouseMovedEvents:TRUE];
     [window setRestorable:FALSE]; // Viewer manages state from own settings
@@ -227,11 +238,6 @@ GLViewRef createOpenGLView(NSWindowRef window, unsigned int samples, bool vsync)
 	return glview;
 }
 
-void setResizeMode(bool oldresize, void* glview)
-{
-    [(LLOpenGLView *)glview setOldResize:oldresize];
-}
-
 void glSwapBuffers(void* context)
 {
 	[(NSOpenGLContext*)context flushBuffer];
@@ -258,19 +264,14 @@ float getDeviceUnitSize(GLViewRef view)
 	return [(LLOpenGLView*)view convertSizeToBacking:NSMakeSize(1, 1)].width;
 }
 
-CGPoint getContentViewBoundsPosition(NSWindowRef window)
+CGRect getContentViewRect(NSWindowRef window)
 {
-	return [[(LLNSWindow*)window contentView] bounds].origin;
+    return [[(LLNSWindow*)window contentView] bounds];
 }
 
-CGSize getContentViewBoundsSize(NSWindowRef window)
+CGRect getBackingViewRect(NSWindowRef window, GLViewRef view)
 {
-	return [[(LLNSWindow*)window contentView] bounds].size;
-}
-
-CGSize getDeviceContentViewSize(NSWindowRef window, GLViewRef view)
-{
-    return [(NSOpenGLView*)view convertRectToBacking:[[(LLNSWindow*)window contentView] bounds]].size;
+    return [(NSOpenGLView*)view convertRectToBacking:[[(LLNSWindow*)window contentView] bounds]];
 }
 
 void getWindowSize(NSWindowRef window, float* size)
@@ -313,9 +314,7 @@ void makeWindowOrderFront(NSWindowRef window)
 
 void convertScreenToWindow(NSWindowRef window, float *coord)
 {
-	NSRect point;
-	point.origin.x = coord[0];
-	point.origin.y = coord[1];
+    NSRect point = NSMakeRect(coord[0], coord[1], 0,0);
 	point = [(LLNSWindow*)window convertRectFromScreen:point];
 	coord[0] = point.origin.x;
 	coord[1] = point.origin.y;
@@ -323,28 +322,18 @@ void convertScreenToWindow(NSWindowRef window, float *coord)
 
 void convertRectToScreen(NSWindowRef window, float *coord)
 {
-	NSRect point;
-	point.origin.x = coord[0];
-	point.origin.y = coord[1];
-	point.size.width = coord[2];
-	point.size.height = coord[3];
-	
-	point = [(LLNSWindow*)window convertRectToScreen:point];
-	
-	coord[0] = point.origin.x;
-	coord[1] = point.origin.y;
-	coord[2] = point.size.width;
-	coord[3] = point.size.height;
+    NSRect rect = NSMakeRect(coord[0], coord[1], coord[2], coord[3]);;
+    rect = [(LLNSWindow*)window convertRectToScreen:rect];
+
+	coord[0] = rect.origin.x;
+	coord[1] = rect.origin.y;
+	coord[2] = rect.size.width;
+	coord[3] = rect.size.height;
 }
 
 void convertRectFromScreen(NSWindowRef window, float *coord)
 {
-	NSRect point;
-	point.origin.x = coord[0];
-	point.origin.y = coord[1];
-	point.size.width = coord[2];
-	point.size.height = coord[3];
-	
+	NSRect point = NSMakeRect(coord[0], coord[1], coord[2], coord[3]);
 	point = [(LLNSWindow*)window convertRectFromScreen:point];
 	
 	coord[0] = point.origin.x;
@@ -353,23 +342,13 @@ void convertRectFromScreen(NSWindowRef window, float *coord)
 	coord[3] = point.size.height;
 }
 
-void convertScreenToView(NSWindowRef window, float *coord)
-{
-	NSRect point;
-	point.origin.x = coord[0];
-	point.origin.y = coord[1];
-	point.origin = [(LLNSWindow*)window convertScreenToBase:point.origin];
-	point.origin = [[(LLNSWindow*)window contentView] convertPoint:point.origin fromView:nil];
-}
-
 void convertWindowToScreen(NSWindowRef window, float *coord)
 {
-	NSPoint point;
-	point.x = coord[0];
-	point.y = coord[1];
-	point = [(LLNSWindow*)window convertToScreenFromLocalPoint:point relativeToView:[(LLNSWindow*)window contentView]];
-	coord[0] = point.x;
-	coord[1] = point.y;
+    NSRect rect = NSMakeRect(coord[0], coord[1], 0, 0);
+    rect = [(LLNSWindow*)window convertRectToScreen:rect];
+
+      coord[0] = rect.origin.x;
+    coord[1] = [[NSScreen screens][0] frame].size.height - rect.origin.y;
 }
 
 void closeWindow(NSWindowRef window)
diff --git a/indra/llwindow/llwindowmacosx.cpp b/indra/llwindow/llwindowmacosx.cpp
index dadbc83f45..030bd5ee7e 100644
--- a/indra/llwindow/llwindowmacosx.cpp
+++ b/indra/llwindow/llwindowmacosx.cpp
@@ -985,7 +985,7 @@ bool LLWindowMacOSX::getPosition(LLCoordScreen *position)
     }
     else if(mWindow)
     {
-        const CGPoint & pos = getContentViewBoundsPosition(mWindow);
+        CGPoint pos = getContentViewRect(mWindow).origin;
 
         position->mX = pos.x;
         position->mY = pos.y;
@@ -1012,7 +1012,7 @@ bool LLWindowMacOSX::getSize(LLCoordScreen *size)
     }
     else if(mWindow)
     {
-        const CGSize & sz = gHiDPISupport ? getDeviceContentViewSize(mWindow, mGLView) : getContentViewBoundsSize(mWindow);
+        CGSize sz = getBackingViewRect(mWindow, mGLView).size;
 
         size->mX = sz.width;
         size->mY = sz.height;
@@ -1038,7 +1038,7 @@ bool LLWindowMacOSX::getSize(LLCoordWindow *size)
     }
     else if(mWindow)
     {
-        const CGSize & sz = gHiDPISupport ? getDeviceContentViewSize(mWindow, mGLView) : getContentViewBoundsSize(mWindow);
+        CGSize sz = getBackingViewRect(mWindow, mGLView).size;
 
         size->mX = sz.width;
         size->mY = sz.height;
@@ -1224,6 +1224,12 @@ void LLWindowMacOSX::setMouseClipping( bool b )
     adjustCursorDecouple();
 }
 
+#if LL_DARWIN
+// For CGSetLocalEventsSuppressionInterval there is no replacement in modern API
+#pragma clang diagnostic push
+#pragma clang diagnostic ignored "-Wdeprecated-declarations"
+#endif
+
 bool LLWindowMacOSX::setCursorPosition(const LLCoordWindow position)
 {
     bool result = false;
@@ -1261,6 +1267,10 @@ bool LLWindowMacOSX::setCursorPosition(const LLCoordWindow position)
     return result;
 }
 
+#if LL_DARWIN
+#pragma clang diagnostic pop
+#endif
+
 bool LLWindowMacOSX::getCursorPosition(LLCoordWindow *position)
 {
     float cursor_point[2];
@@ -1485,8 +1495,9 @@ bool LLWindowMacOSX::convertCoords(LLCoordScreen from, LLCoordWindow* to)
 
         convertScreenToWindow(mWindow, mouse_point);
 
-        to->mX = mouse_point[0];
-        to->mY = mouse_point[1];
+        float scale_factor = getSystemUISize();
+        to->mX = mouse_point[0] * scale_factor;
+        to->mY = mouse_point[1] * scale_factor;
 
         return true;
     }
@@ -1498,9 +1509,9 @@ bool LLWindowMacOSX::convertCoords(LLCoordWindow from, LLCoordScreen *to)
     if(mWindow)
     {
         float mouse_point[2];
-
-        mouse_point[0] = from.mX;
-        mouse_point[1] = from.mY;
+        float scale_factor = getSystemUISize();
+        mouse_point[0] = from.mX / scale_factor;
+        mouse_point[1] = from.mY / scale_factor;
 
         convertWindowToScreen(mWindow, mouse_point);
 
@@ -2637,7 +2648,7 @@ MASK LLWindowMacOSX::modifiersToMask(S16 modifiers)
 
 F32 LLWindowMacOSX::getSystemUISize()
 {
-    return gHiDPISupport ? ::getDeviceUnitSize(mGLView) : LLWindow::getSystemUISize();
+    return ::getDeviceUnitSize(mGLView);
 }
 
 #if LL_OS_DRAGDROP_ENABLED
diff --git a/indra/llwindow/llwindowmacosx.h b/indra/llwindow/llwindowmacosx.h
index 7de1a40d93..110c5756d0 100644
--- a/indra/llwindow/llwindowmacosx.h
+++ b/indra/llwindow/llwindowmacosx.h
@@ -174,9 +174,6 @@ protected:
 
     bool    shouldPostQuit() { return mPostQuit; }
 
-    //Satisfy MAINT-3135 and MAINT-3288 with a flag.
-    /*virtual */ void setOldResize(bool oldresize) override {setResizeMode(oldresize, mGLView); }
-
 private:
     void restoreGLContext();
 
diff --git a/indra/llwindow/llwindowwin32.cpp b/indra/llwindow/llwindowwin32.cpp
index b127c9b48f..fc7d8cec72 100644
--- a/indra/llwindow/llwindowwin32.cpp
+++ b/indra/llwindow/llwindowwin32.cpp
@@ -810,7 +810,7 @@ LLWindowWin32::LLWindowWin32(LLWindowCallbacks* callbacks,
     //  }
 
     // SL-12971 dual GPU display
-    DISPLAY_DEVICEA display_device;
+    DISPLAY_DEVICE display_device;
     int             display_index = -1;
     DWORD           display_flags = 0; // EDD_GET_DEVICE_INTERFACE_NAME ?
     const size_t    display_bytes = sizeof(display_device);
@@ -821,23 +821,23 @@ LLWindowWin32::LLWindowWin32(LLWindowCallbacks* callbacks,
         {
             // CHAR DeviceName  [ 32] Adapter name
             // CHAR DeviceString[128]
-            CHAR text[256];
+            WCHAR text[256];
 
-            size_t name_len = strlen(display_device.DeviceName  );
-            size_t desc_len = strlen(display_device.DeviceString);
+            size_t name_len = lstrlen(display_device.DeviceName  );
+            size_t desc_len = lstrlen(display_device.DeviceString);
 
-            const CHAR *name = name_len ? display_device.DeviceName   : "???";
-            const CHAR *desc = desc_len ? display_device.DeviceString : "???";
+            const WCHAR *name = name_len ? display_device.DeviceName   : TEXT("???");
+            const WCHAR *desc = desc_len ? display_device.DeviceString : TEXT("???");
 
-            sprintf(text, "Display Device %d: %s, %s", display_index, name, desc);
-            LL_INFOS("Window") << text << LL_ENDL;
+            wsprintf(text, TEXT("Display Device %d: %s, %s"), display_index, name, desc);
+            LL_INFOS("Window") << ll_convert<std::string>(std::wstring(text)) << LL_ENDL;
         }
 
         ::ZeroMemory(&display_device,display_bytes);
         display_device.cb = display_bytes;
 
         display_index++;
-    }  while( EnumDisplayDevicesA(NULL, display_index, &display_device, display_flags ));
+    }  while( EnumDisplayDevices(NULL, display_index, &display_device, display_flags ));
 
     LL_INFOS("Window") << "Total Display Devices: " << display_index << LL_ENDL;
 
@@ -1696,6 +1696,11 @@ const   S32   max_format  = (S32)num_formats - 1;
         return false;
     }
 
+    // Setup Tracy gpu context
+    {
+        LL_PROFILER_GPU_CONTEXT;
+    }
+
     // Disable vertical sync for swap
     toggleVSync(enable_vsync);
 
@@ -1727,8 +1732,6 @@ const   S32   max_format  = (S32)num_formats - 1;
         swapBuffers();
     }
 
-    LL_PROFILER_GPU_CONTEXT;
-
     return true;
 }
 
@@ -1961,7 +1964,7 @@ void LLWindowWin32::setTitle(const std::string title)
     // to support non-ascii usernames (and region names?)
     mWindowThread->post([=]()
         {
-            SetWindowTextA(mWindowHandle, title.c_str());
+            SetWindowText(mWindowHandle, ll_convert<std::wstring>(title).c_str());
         });
 }
 
@@ -3286,7 +3289,7 @@ bool LLWindowWin32::pasteTextFromClipboard(LLWString &dst)
                 WCHAR *utf16str = (WCHAR*) GlobalLock(h_data);
                 if (utf16str)
                 {
-                    dst = utf16str_to_wstring(utf16str);
+                    dst = ll_convert<LLWString>(std::wstring(utf16str));
                     LLWStringUtil::removeWindowsCR(dst);
                     GlobalUnlock(h_data);
                     success = true;
@@ -3311,8 +3314,8 @@ bool LLWindowWin32::copyTextToClipboard(const LLWString& wstr)
         // Provide a copy of the data in Unicode format.
         LLWString sanitized_string(wstr);
         LLWStringUtil::addCRLF(sanitized_string);
-        llutf16string out_utf16 = wstring_to_utf16str(sanitized_string);
-        const size_t size_utf16 = (out_utf16.length() + 1) * sizeof(WCHAR);
+        std::wstring out_utf16 = ll_convert<std::wstring>(sanitized_string);
+        const size_t size_utf16 = (out_utf16.length() + 1) * sizeof(wchar_t);
 
         // Memory is allocated and then ownership of it is transfered to the system.
         HGLOBAL hglobal_copy_utf16 = GlobalAlloc(GMEM_MOVEABLE, size_utf16);
@@ -3672,7 +3675,7 @@ void LLSplashScreenWin32::showImpl()
     ShowWindow(mWindow, SW_SHOW);
 
     // Should set taskbar text without creating a header for the window (caption)
-    SetWindowTextA(mWindow, "Second Life");
+    SetWindowText(mWindow, TEXT("Second Life"));
 }
 
 
@@ -3809,8 +3812,7 @@ void LLWindowWin32::spawnWebBrowser(const std::string& escaped_url, bool async)
     // reliablly on Vista.
 
     // this is madness.. no, this is..
-    LLWString url_wstring = utf8str_to_wstring( escaped_url );
-    llutf16string url_utf16 = wstring_to_utf16str( url_wstring );
+    std::wstring url_utf16 = ll_convert<std::wstring>(escaped_url);
 
     // let the OS decide what to use to open the URL
     SHELLEXECUTEINFO sei = { sizeof( sei ) };
@@ -4098,7 +4100,7 @@ void LLWindowWin32::fillCompositionLogfont(LOGFONT *logfont)
 U32 LLWindowWin32::fillReconvertString(const LLWString &text,
     S32 focus, S32 focus_length, RECONVERTSTRING *reconvert_string)
 {
-    const llutf16string text_utf16 = wstring_to_utf16str(text);
+    const std::wstring text_utf16 = ll_convert<std::wstring>(text);
     const DWORD required_size = sizeof(RECONVERTSTRING) + (static_cast<DWORD>(text_utf16.length()) + 1) * sizeof(WCHAR);
     if (reconvert_string && reconvert_string->dwSize >= required_size)
     {
@@ -4198,7 +4200,7 @@ void LLWindowWin32::handleCompositionMessage(const U32 indexes)
             size = LLWinImm::getCompositionString(himc, GCS_RESULTSTR, data, size);
             if (size > 0)
             {
-                result_string = utf16str_to_wstring(llutf16string(data, size / sizeof(WCHAR)));
+                result_string = ll_convert_wide_to_wstring(std::wstring(data, size / sizeof(WCHAR)));
             }
             delete[] data;
             needs_update = true;
@@ -4215,7 +4217,7 @@ void LLWindowWin32::handleCompositionMessage(const U32 indexes)
             if (size > 0)
             {
                 preedit_string_utf16_length = size / sizeof(WCHAR);
-                preedit_string = utf16str_to_wstring(llutf16string(data, size / sizeof(WCHAR)));
+                preedit_string = ll_convert_wide_to_wstring(std::wstring(data, size / sizeof(WCHAR)));
             }
             delete[] data;
             needs_update = true;