diff --git a/internal/uidriver/glfw/ui.go b/internal/uidriver/glfw/ui.go
index 29900ec43..03ddf439d 100644
--- a/internal/uidriver/glfw/ui.go
+++ b/internal/uidriver/glfw/ui.go
@@ -789,19 +789,20 @@ func (u *UserInterface) updateSize() {
 	if sizeChanged {
 		var w, h float64
 		_ = u.t.Call(func() error {
-			var ww, wh int
 			if u.isFullscreen() {
 				v := currentMonitor(u.window).GetVideoMode()
-				ww = v.Width
-				wh = v.Height
+				ww, wh := v.Width, v.Height
+				w = u.toDeviceIndependentPixel(float64(ww))
+				h = u.toDeviceIndependentPixel(float64(wh))
 			} else {
 				// Instead of u.windowWidth and u.windowHeight, use the actual window size here.
 				// On Windows, the specified size at SetSize and the actual window size might not
 				// match (#1163).
-				ww, wh = u.window.GetSize()
+				ww, wh := u.window.GetSize()
+				// TODO: Is this correct?
+				w = u.toDeviceIndependentPixel(float64(ww))
+				h = u.toDeviceIndependentPixel(float64(wh))
 			}
-			w = u.toDeviceIndependentPixel(float64(ww))
-			h = u.toDeviceIndependentPixel(float64(wh))
 			return nil
 		})
 		u.context.Layout(w, h)
diff --git a/internal/uidriver/glfw/ui_darwin.go b/internal/uidriver/glfw/ui_darwin.go
index 7839b649e..436cd4578 100644
--- a/internal/uidriver/glfw/ui_darwin.go
+++ b/internal/uidriver/glfw/ui_darwin.go
@@ -49,6 +49,10 @@ func (u *UserInterface) toDeviceIndependentPixel(x float64) float64 {
 	return x
 }
 
+func (u *UserInterface) fromGLFWPixel(x float64) float64 {
+	return x
+}
+
 func (u *UserInterface) toGLFWPixel(x float64) float64 {
 	return x
 }
diff --git a/internal/uidriver/glfw/ui_unix.go b/internal/uidriver/glfw/ui_unix.go
index da130a227..c9ff3c23d 100644
--- a/internal/uidriver/glfw/ui_unix.go
+++ b/internal/uidriver/glfw/ui_unix.go
@@ -27,6 +27,11 @@ func (u *UserInterface) toDeviceIndependentPixel(x float64) float64 {
 	return x / u.deviceScaleFactor()
 }
 
+// fromGLFWPixel must be called from the main thread.
+func (u *UserInterface) fromGLFWPixel(x float64) float64 {
+	return x
+}
+
 // toGLFWPixel must be called from the main thread.
 func (u *UserInterface) toGLFWPixel(x float64) float64 {
 	return x
diff --git a/internal/uidriver/glfw/ui_windows.go b/internal/uidriver/glfw/ui_windows.go
index d427ffa3e..2aeb4410f 100644
--- a/internal/uidriver/glfw/ui_windows.go
+++ b/internal/uidriver/glfw/ui_windows.go
@@ -104,6 +104,11 @@ func (u *UserInterface) toDeviceIndependentPixel(x float64) float64 {
 	return x / u.deviceScaleFactor()
 }
 
+// fromGLFWPixel must be called from the main thread.
+func (u *UserInterface) fromGLFWPixel(x float64) float64 {
+	return x / u.deviceScaleFactor()
+}
+
 // toGLFWPixel must be called from the main thread.
 func (u *UserInterface) toGLFWPixel(x float64) float64 {
 	return x * u.deviceScaleFactor()
diff --git a/internal/uidriver/glfw/window.go b/internal/uidriver/glfw/window.go
index 70f475a9a..365f5a6b2 100644
--- a/internal/uidriver/glfw/window.go
+++ b/internal/uidriver/glfw/window.go
@@ -192,8 +192,8 @@ func (w *window) Position() (int, int) {
 		mx, my := currentMonitor(w.ui.window).GetPos()
 		wx -= mx
 		wy -= my
-		xf := w.ui.toDeviceIndependentPixel(float64(wx))
-		yf := w.ui.toDeviceIndependentPixel(float64(wy))
+		xf := w.ui.fromGLFWPixel(float64(wx))
+		yf := w.ui.fromGLFWPixel(float64(wy))
 		x, y = int(xf), int(yf)
 		return nil
 	})
@@ -226,8 +226,8 @@ func (w *window) Size() (int, int) {
 	if !w.ui.isRunning() {
 		return w.ui.getInitWindowSize()
 	}
-	ww := int(w.ui.toDeviceIndependentPixel(float64(w.ui.windowWidth)))
-	wh := int(w.ui.toDeviceIndependentPixel(float64(w.ui.windowHeight)))
+	ww := int(w.ui.fromGLFWPixel(float64(w.ui.windowWidth)))
+	wh := int(w.ui.fromGLFWPixel(float64(w.ui.windowHeight)))
 	return ww, wh
 }