diff --git a/examples/sdl/sdl.go b/examples/sdl/sdl.go
index cad4fa0..a1014de 100644
--- a/examples/sdl/sdl.go
+++ b/examples/sdl/sdl.go
@@ -34,12 +34,12 @@ func main() {
 
 	// create window
 	const title = "SDL Test"
-	window, err := sdl.CreateWindow(title, sdl.WINDOWPOS_CENTERED, sdl.WINDOWPOS_CENTERED, 1280, 720, sdl.WINDOW_RESIZABLE|sdl.WINDOW_OPENGL)
+	window, err := sdl.CreateWindow(title, sdl.WINDOWPOS_CENTERED, sdl.WINDOWPOS_CENTERED, 1280, 720, sdl.WINDOW_RESIZABLE|sdl.WINDOW_OPENGL|sdl.WINDOW_ALLOW_HIGHDPI)
 	if err != nil {
 		// fallback in case multisample is not available
 		sdl.GLSetAttribute(sdl.GL_MULTISAMPLEBUFFERS, 0)
 		sdl.GLSetAttribute(sdl.GL_MULTISAMPLESAMPLES, 0)
-		window, err = sdl.CreateWindow(title, sdl.WINDOWPOS_CENTERED, sdl.WINDOWPOS_CENTERED, 1280, 720, sdl.WINDOW_RESIZABLE|sdl.WINDOW_OPENGL)
+		window, err = sdl.CreateWindow(title, sdl.WINDOWPOS_CENTERED, sdl.WINDOWPOS_CENTERED, 1280, 720, sdl.WINDOW_RESIZABLE|sdl.WINDOW_OPENGL|sdl.WINDOW_ALLOW_HIGHDPI)
 		if err != nil {
 			log.Fatalf("Error creating window: %v", err)
 		}
@@ -78,6 +78,12 @@ func main() {
 			continue
 		}
 
+		// find window size and scaling
+		ww, wh := window.GetSize()
+		fbw, fbh := window.GLGetDrawableSize()
+		sx := float64(fbw) / float64(ww)
+		sy := float64(fbh) / float64(wh)
+
 		// handle events
 		for {
 			event := sdl.PollEvent()
@@ -91,7 +97,7 @@ func main() {
 					running = false
 				}
 			case *sdl.MouseMotionEvent:
-				mx, my = float64(e.X), float64(e.Y)
+				mx, my = float64(e.X)*sx, float64(e.Y)*sy
 			case *sdl.QuitEvent:
 				running = false
 			case *sdl.WindowEvent:
@@ -102,11 +108,10 @@ func main() {
 		}
 
 		// set canvas size
-		ww, wh := window.GetSize()
-		backend.SetBounds(0, 0, int(ww), int(wh))
+		backend.SetBounds(0, 0, int(fbw), int(fbh))
 
 		// call the run function to do all the drawing
-		run(cv, float64(ww), float64(wh))
+		run(cv, float64(fbw), float64(fbh))
 
 		// swap back and front buffer
 		window.GLSwap()
diff --git a/go.mod b/go.mod
index ac60148..bfa6927 100644
--- a/go.mod
+++ b/go.mod
@@ -5,9 +5,9 @@ require (
 	github.com/go-gl/glfw v0.0.0-20181014061658-691ee1b84c51
 	github.com/go-gl/glfw/v3.3/glfw v0.0.0-20191125211704-12ad95a8df72
 	github.com/golang/freetype v0.0.0-20170609003504-e2365dfdc4a0
-	github.com/veandco/go-sdl2 v0.3.3
+	github.com/veandco/go-sdl2 v0.4.0
 	golang.org/x/exp v0.0.0-20181106170214-d68db9428509
-	golang.org/x/image v0.0.0-20181109002202-aa35264064ba
+	golang.org/x/image v0.0.0-20200119044424-58c23975cae1
 	golang.org/x/mobile v0.0.0-20181026062114-a27dd33d354d
 	golang.org/x/sys v0.0.0-20181128092732-4ed8d59d0b35 // indirect
 )
diff --git a/go.sum b/go.sum
index 84b9261..eec14a1 100644
--- a/go.sum
+++ b/go.sum
@@ -8,11 +8,14 @@ github.com/golang/freetype v0.0.0-20170609003504-e2365dfdc4a0 h1:DACJavvAHhabrF0
 github.com/golang/freetype v0.0.0-20170609003504-e2365dfdc4a0/go.mod h1:E/TSTwGwJL78qG/PmXZO1EjYhfJinVAhrmmHX6Z8B9k=
 github.com/veandco/go-sdl2 v0.3.3 h1:4/TirgB2MQ7oww3pM3Yfgf1YbChMlAQAmiCPe5koK0I=
 github.com/veandco/go-sdl2 v0.3.3/go.mod h1:FB+kTpX9YTE+urhYiClnRzpOXbiWgaU3+5F2AB78DPg=
+github.com/veandco/go-sdl2 v0.4.0 h1:l9q6K+Dvpd/VlZdw2ufApKnWhAQqx9UL8Zrvbjtm3Lw=
+github.com/veandco/go-sdl2 v0.4.0/go.mod h1:FB+kTpX9YTE+urhYiClnRzpOXbiWgaU3+5F2AB78DPg=
 golang.org/x/exp v0.0.0-20181106170214-d68db9428509 h1:k21GX33vzpH/syMF7TgrLxe8ILtvwbyuHtEO3ebR82E=
 golang.org/x/exp v0.0.0-20181106170214-d68db9428509/go.mod h1:CJ0aWSM057203Lf6IL+f9T1iT9GByDxfZKAQTCR3kQA=
-golang.org/x/image v0.0.0-20181109002202-aa35264064ba h1:tKfAeDKyjJZwxAJ8TPBZaf6LpvauubUHT8wwpdz+OMM=
-golang.org/x/image v0.0.0-20181109002202-aa35264064ba/go.mod h1:ux5Hcp/YLpHSI86hEcLt0YII63i6oz57MZXIpbrjZUs=
+golang.org/x/image v0.0.0-20200119044424-58c23975cae1 h1:5h3ngYt7+vXCDZCup/HkCQgW5XwmSvR/nA2JmJ0RErg=
+golang.org/x/image v0.0.0-20200119044424-58c23975cae1/go.mod h1:FeLwcggjj3mMvU+oOTbSwawSJRM1uh48EjtB4UJZlP0=
 golang.org/x/mobile v0.0.0-20181026062114-a27dd33d354d h1:DuZZDdMFwDrzmycNhCaWSve7Vh+BIrjm7ttgb4fD3Os=
 golang.org/x/mobile v0.0.0-20181026062114-a27dd33d354d/go.mod h1:z+o9i4GpDbdi3rU15maQ/Ox0txvL9dWGYEHz965HBQE=
 golang.org/x/sys v0.0.0-20181128092732-4ed8d59d0b35 h1:YAFjXN64LMvktoUZH9zgY4lGc/msGN7HQfoSuKCgaDU=
 golang.org/x/sys v0.0.0-20181128092732-4ed8d59d0b35/go.mod h1:STP8DvDyc/dI5b8T5hshtkjS+E42TnysNCUPdjciGhY=
+golang.org/x/text v0.3.0/go.mod h1:NqM8EUOU14njkJ3fqMW+pc6Ldnwhi/IjpwHt7yyuwOQ=
diff --git a/sdlcanvas/sdlcanvas.go b/sdlcanvas/sdlcanvas.go
index 211d632..11d9bae 100644
--- a/sdlcanvas/sdlcanvas.go
+++ b/sdlcanvas/sdlcanvas.go
@@ -5,6 +5,7 @@ import (
 	_ "image/gif" // Imported here so that applications based on this package support these formats by default
 	_ "image/jpeg"
 	_ "image/png"
+	"math"
 	"runtime"
 	"time"
 	"unicode/utf8"
@@ -38,6 +39,8 @@ type Window struct {
 	KeyUp      func(scancode int, rn rune, name string)
 	KeyChar    func(rn rune)
 	SizeChange func(w, h int)
+	scalex     float64
+	scaley     float64
 }
 
 // CreateWindow creates a window using SDL and initializes the OpenGL context
@@ -61,11 +64,11 @@ func CreateWindow(w, h int, title string) (*Window, *canvas.Canvas, error) {
 	sdl.GLSetAttribute(sdl.GL_MULTISAMPLESAMPLES, 4)
 
 	// create window
-	window, err := sdl.CreateWindow(title, sdl.WINDOWPOS_CENTERED, sdl.WINDOWPOS_CENTERED, int32(w), int32(h), sdl.WINDOW_RESIZABLE|sdl.WINDOW_OPENGL)
+	window, err := sdl.CreateWindow(title, sdl.WINDOWPOS_CENTERED, sdl.WINDOWPOS_CENTERED, int32(w), int32(h), sdl.WINDOW_RESIZABLE|sdl.WINDOW_OPENGL|sdl.WINDOW_ALLOW_HIGHDPI)
 	if err != nil {
 		sdl.GLSetAttribute(sdl.GL_MULTISAMPLEBUFFERS, 0)
 		sdl.GLSetAttribute(sdl.GL_MULTISAMPLESAMPLES, 0)
-		window, err = sdl.CreateWindow(title, sdl.WINDOWPOS_CENTERED, sdl.WINDOWPOS_CENTERED, int32(w), int32(h), sdl.WINDOW_RESIZABLE|sdl.WINDOW_OPENGL)
+		window, err = sdl.CreateWindow(title, sdl.WINDOWPOS_CENTERED, sdl.WINDOWPOS_CENTERED, int32(w), int32(h), sdl.WINDOW_RESIZABLE|sdl.WINDOW_OPENGL|sdl.WINDOW_ALLOW_HIGHDPI)
 		if err != nil {
 			return nil, nil, fmt.Errorf("Error creating window: %v", err)
 		}
@@ -88,7 +91,8 @@ func CreateWindow(w, h int, title string) (*Window, *canvas.Canvas, error) {
 	}
 
 	// load canvas GL backend
-	backend, err := goglbackend.New(0, 0, w, h, nil)
+	fbw, fbh := window.GLGetDrawableSize()
+	backend, err := goglbackend.New(0, 0, int(fbw), int(fbh), nil)
 	if err != nil {
 		return nil, nil, fmt.Errorf("Error loading GoGL backend: %v", err)
 	}
@@ -104,6 +108,8 @@ func CreateWindow(w, h int, title string) (*Window, *canvas.Canvas, error) {
 		Backend:   backend,
 		canvas:    cv,
 		events:    make([]sdl.Event, 0, 100),
+		scalex:    float64(fbw) / float64(w),
+		scaley:    float64(fbh) / float64(h),
 	}
 
 	return wnd, cv, nil
@@ -144,23 +150,27 @@ func (wnd *Window) StartFrame() error {
 		case *sdl.MouseButtonEvent:
 			if e.Type == sdl.MOUSEBUTTONDOWN {
 				if wnd.MouseDown != nil {
-					wnd.MouseDown(int(e.Button), int(e.X), int(e.Y))
+					mx, my := wnd.mpos(e.X, e.Y)
+					wnd.MouseDown(int(e.Button), mx, my)
 					handled = true
 				}
 			} else if e.Type == sdl.MOUSEBUTTONUP {
 				if wnd.MouseUp != nil {
-					wnd.MouseUp(int(e.Button), int(e.X), int(e.Y))
+					mx, my := wnd.mpos(e.X, e.Y)
+					wnd.MouseUp(int(e.Button), mx, my)
 					handled = true
 				}
 			}
 		case *sdl.MouseMotionEvent:
 			if wnd.MouseMove != nil {
-				wnd.MouseMove(int(e.X), int(e.Y))
+				mx, my := wnd.mpos(e.X, e.Y)
+				wnd.MouseMove(mx, my)
 				handled = true
 			}
 		case *sdl.MouseWheelEvent:
 			if wnd.MouseWheel != nil {
-				wnd.MouseWheel(int(e.X), int(e.Y))
+				mx, my := wnd.mpos(e.X, e.Y)
+				wnd.MouseWheel(mx, my)
 				handled = true
 			}
 		case *sdl.KeyboardEvent:
@@ -184,6 +194,9 @@ func (wnd *Window) StartFrame() error {
 		case *sdl.WindowEvent:
 			if e.WindowID == wnd.WindowID {
 				if e.Event == sdl.WINDOWEVENT_SIZE_CHANGED {
+					fbw, fbh := wnd.Window.GLGetDrawableSize()
+					wnd.scalex = float64(fbw) / float64(e.Data1)
+					wnd.scaley = float64(fbh) / float64(e.Data2)
 					if wnd.SizeChange != nil {
 						wnd.SizeChange(int(e.Data1), int(e.Data2))
 						handled = true
@@ -207,6 +220,12 @@ func (wnd *Window) StartFrame() error {
 	return nil
 }
 
+func (wnd *Window) mpos(x, y int32) (int, int) {
+	mx := int(math.Round(float64(x) * wnd.scalex))
+	my := int(math.Round(float64(y) * wnd.scaley))
+	return mx, my
+}
+
 // FinishFrame updates the FPS count and displays the frame
 func (wnd *Window) FinishFrame() {
 	now := time.Now()
@@ -259,3 +278,10 @@ func (wnd *Window) Size() (int, int) {
 	w, h := wnd.Window.GetSize()
 	return int(w), int(h)
 }
+
+// FramebufferSize returns the current width and height of
+// the framebuffer
+func (wnd *Window) FramebufferSize() (int, int) {
+	w, h := wnd.Window.GLGetDrawableSize()
+	return int(w), int(h)
+}