diff --git a/.gitignore b/.gitignore
index f8055b0719..04c35efa25 100644
--- a/.gitignore
+++ b/.gitignore
@@ -12,3 +12,4 @@ bin
 .vscode
 /tools/mikktspace/out
 *.exe
+.DS_store
\ No newline at end of file
diff --git a/h3d/Engine.hx b/h3d/Engine.hx
index e07ba63838..757963d4f2 100644
--- a/h3d/Engine.hx
+++ b/h3d/Engine.hx
@@ -280,7 +280,14 @@ class Engine {
 		if( height < 32 ) height = 32;
 		this.width = width;
 		this.height = height;
-		if( !driver.isDisposed() ) driver.resize(width, height);
+
+		// Set the driver size to actual pixel width
+		// (same as window size on normal displays, differs when high DPI is enabled)
+		var r = window.windowToPixelRatio;
+		var pw = Std.int(width / r);
+		var ph = Std.int(height / r);
+
+		if( !driver.isDisposed() ) driver.resize(pw, ph);
 	}
 
 	public function begin() {
diff --git a/hxd/System.hl.hx b/hxd/System.hl.hx
index 98cb74c0f4..76b376553c 100644
--- a/hxd/System.hl.hx
+++ b/hxd/System.hl.hx
@@ -97,6 +97,7 @@ class System {
 		var size = haxe.macro.Compiler.getDefine("windowSize");
 		var title = haxe.macro.Compiler.getDefine("windowTitle");
 		var fixed = haxe.macro.Compiler.getDefine("windowFixed") == "1";
+		var highDPI = haxe.macro.Compiler.getDefine("highDPI") == "1";
 		if( title == null )
 			title = "";
 		if( size != null ) {
@@ -108,10 +109,10 @@ class System {
 		#if hlsdl
 			sdl.Sdl.init();
 			@:privateAccess Window.initChars();
-			@:privateAccess Window.inst = new Window(title, width, height, fixed);
+			@:privateAccess Window.inst = new Window(title, width, height, fixed, highDPI);
 			init();
 		#elseif hldx
-			@:privateAccess Window.inst = new Window(title, width, height, fixed);
+			@:privateAccess Window.inst = new Window(title, width, height, fixed, highDPI);
 			init();
 		#else
 			@:privateAccess Window.inst = new Window(title, width, height);
diff --git a/hxd/Window.hl.hx b/hxd/Window.hl.hx
index 41ee95dfb7..246f1a5fe2 100644
--- a/hxd/Window.hl.hx
+++ b/hxd/Window.hl.hx
@@ -26,6 +26,8 @@ class Window {
 
 	public var width(get, never) : Int;
 	public var height(get, never) : Int;
+	public var windowToPixelRatio(get, never) : Float;
+
 	public var mouseX(get, never) : Int;
 	public var mouseY(get, never) : Int;
 	public var mouseLock(get, set) : Bool;
@@ -50,13 +52,16 @@ class Window {
 	static inline var TOUCH_SCALE = #if (hl_ver >= version("1.12.0")) 10000 #else 100 #end;
 	#end
 
-	function new(title:String, width:Int, height:Int, fixed:Bool = false) {
+	function new(title:String, width:Int, height:Int, fixed:Bool = false, highDPI = false) {
 		this.windowWidth = width;
 		this.windowHeight = height;
 		eventTargets = new List();
 		resizeEvents = new List();
 		#if hlsdl
-		final sdlFlags = if (!fixed) sdl.Window.SDL_WINDOW_SHOWN | sdl.Window.SDL_WINDOW_RESIZABLE else sdl.Window.SDL_WINDOW_SHOWN;
+		var sdlFlags = if (!fixed) sdl.Window.SDL_WINDOW_SHOWN | sdl.Window.SDL_WINDOW_RESIZABLE else sdl.Window.SDL_WINDOW_SHOWN;
+		if (highDPI) {
+			sdlFlags |= sdl.Window.SDL_WINDOW_ALLOW_HIGHDPI;
+		}
 		window = new sdl.Window(title, width, height, sdl.Window.SDL_WINDOWPOS_CENTERED, sdl.Window.SDL_WINDOWPOS_CENTERED, sdlFlags);
 		#elseif hldx
 		final dxFlags = if (!fixed) dx.Window.RESIZABLE else 0;
@@ -133,6 +138,10 @@ class Window {
 	function get_height() : Int {
 		return windowHeight;
 	}
+	
+	function get_windowToPixelRatio() : Float {
+		return window.windowToPixelRatio;
+	}
 
 	function get_mouseLock() : Bool {
 		return false;
diff --git a/hxd/Window.hx b/hxd/Window.hx
index 79e5db182b..c71dc533eb 100644
--- a/hxd/Window.hx
+++ b/hxd/Window.hx
@@ -14,6 +14,8 @@ class Window {
 
 	public var width(get, never) : Int;
 	public var height(get, never) : Int;
+	public var windowToPixelRatio(get, never) : Float;
+
 	public var mouseX(get, never) : Int;
 	public var mouseY(get, never) : Int;
 	public var mouseLock(get, set) : Bool;
@@ -95,6 +97,10 @@ class Window {
 		return 0;
 	}
 
+	function get_windowToPixelRatio() : Float {
+		return 0.0;
+	}
+
 	function get_mouseLock() : Bool {
 		return false;
 	}
diff --git a/hxd/Window.js.hx b/hxd/Window.js.hx
index 086815c923..ed048d7746 100644
--- a/hxd/Window.js.hx
+++ b/hxd/Window.js.hx
@@ -14,6 +14,8 @@ class Window {
 
 	public var width(get, never) : Int;
 	public var height(get, never) : Int;
+	public var windowToPixelRatio(get, never) : Float;
+
 	public var mouseX(get, never) : Int;
 	public var mouseY(get, never) : Int;
 	public var mouseLock(get, set) : Bool;
@@ -201,6 +203,10 @@ class Window {
 		return Math.round(canvasPos.height * getPixelRatio());
 	}
 
+	function get_windowToPixelRatio() {
+		return 1.0;
+	}
+
 	function get_mouseX() {
 		return Math.round((curMouseX - canvasPos.left) * getPixelRatio());
 	}