diff --git a/libs/directx/dx/Window.hx b/libs/directx/dx/Window.hx
index a0c5b7872..dba321a58 100644
--- a/libs/directx/dx/Window.hx
+++ b/libs/directx/dx/Window.hx
@@ -28,6 +28,7 @@ class Window {
 	public var title(default, set) : String;
 	public var width(get, never) : Int;
 	public var height(get, never) : Int;
+	public var windowToPixelRatio(get, never) : Float;
 	public var minWidth(get, never) : Int;
 	public var minHeight(get, never) : Int;
 	public var maxWidth(get, never) : Int;
@@ -112,6 +113,11 @@ class Window {
 		return h;
 	}
 
+	function get_windowToPixelRatio() {
+		// Not yet implemented
+		return 1.0;
+	}
+
 	function get_minWidth() {
 		var w = 0;
 		winGetMinSize(win, w, null);
diff --git a/libs/sdl/sdl.c b/libs/sdl/sdl.c
index bbcfb3f3e..dea66f25d 100644
--- a/libs/sdl/sdl.c
+++ b/libs/sdl/sdl.c
@@ -526,6 +526,10 @@ HL_PRIM void HL_NAME(win_set_max_size)(SDL_Window *win, int width, int height) {
 	SDL_SetWindowMaximumSize(win, width, height);
 }
 
+HL_PRIM void HL_NAME(win_get_pixel_size)(SDL_Window *win, int *width, int *height) {
+	SDL_GL_GetDrawableSize(win, width, height);
+}
+
 HL_PRIM void HL_NAME(win_get_size)(SDL_Window *win, int *width, int *height) {
 	SDL_GetWindowSize(win, width, height);
 }
@@ -605,6 +609,7 @@ DEFINE_PRIM(_VOID, win_get_position, TWIN _REF(_I32) _REF(_I32));
 DEFINE_PRIM(_VOID, win_set_size, TWIN _I32 _I32);
 DEFINE_PRIM(_VOID, win_set_min_size, TWIN _I32 _I32);
 DEFINE_PRIM(_VOID, win_set_max_size, TWIN _I32 _I32);
+DEFINE_PRIM(_VOID, win_get_pixel_size, TWIN _REF(_I32) _REF(_I32));
 DEFINE_PRIM(_VOID, win_get_size, TWIN _REF(_I32) _REF(_I32));
 DEFINE_PRIM(_VOID, win_get_min_size, TWIN _REF(_I32) _REF(_I32));
 DEFINE_PRIM(_VOID, win_get_max_size, TWIN _REF(_I32) _REF(_I32));
diff --git a/libs/sdl/sdl/Window.hx b/libs/sdl/sdl/Window.hx
index 899307101..e9b2dd7fe 100644
--- a/libs/sdl/sdl/Window.hx
+++ b/libs/sdl/sdl/Window.hx
@@ -50,6 +50,7 @@ class Window {
 	public var vsync(default, set) : Bool;
 	public var width(get, never) : Int;
 	public var height(get, never) : Int;
+	public var windowToPixelRatio(get, never) : Float;
 	public var minWidth(get, never) : Int;
 	public var minHeight(get, never) : Int;
 	public var maxWidth(get, never) : Int;
@@ -176,6 +177,14 @@ class Window {
 		return w;
 	}
 
+	function get_windowToPixelRatio() {
+		var pixelHeight = 0;
+		winGetPixelSize(win, null, pixelHeight);
+		var h : Float = height;
+
+		return h / pixelHeight;
+	}
+
 	function get_height() {
 		var h = 0;
 		winGetSize(win, null, h);
@@ -312,6 +321,9 @@ class Window {
 	static function winGetSize( win : WinPtr, width : hl.Ref<Int>, height : hl.Ref<Int> ) {
 	}
 
+	static function winGetPixelSize( win : WinPtr, width : hl.Ref<Int>, height : hl.Ref<Int> ) {
+	}
+
 	static function winGetMinSize( win : WinPtr, width : hl.Ref<Int>, height : hl.Ref<Int> ) {
 	}