diff --git a/allg5ui/renderer.go b/allg5ui/renderer.go
index efb716b..8f035a2 100644
--- a/allg5ui/renderer.go
+++ b/allg5ui/renderer.go
@@ -180,7 +180,7 @@ func (r *Renderer) CreateFontPath(path string, size int) (ui.Font, error) {
 	return &font{f}, nil
 }
 
-func (r *Renderer) createTexture(source ui.ImageSource, keepSource bool) (ui.Texture, error) {
+func (r *Renderer) createTexture(source ui.ImageSource, keepSource bool) (*texture, error) {
 	im, err := source.CreateImage()
 	if err != nil {
 		return nil, err
@@ -314,15 +314,23 @@ func (r *Renderer) RenderToDisplay() {
 	r.disp.SetAsTarget()
 }
 
-func (r *Renderer) Resources() ui.Resources { return r.res }
-
-func (r *Renderer) Size() geom.PointF32 {
-	return geom.PtF32(float32(r.disp.Width()), float32(r.disp.Height()))
+func (r *Renderer) Resize(width, height int) {
+	r.disp.Resize(width, height)
 }
 
-func (r *Renderer) SetIcon(texture ui.Texture) {
-	bmp := r.mustGetBitmap(texture)
-	r.disp.SetIcon(bmp)
+func (r *Renderer) Resources() ui.Resources { return r.res }
+
+func (r *Renderer) Size() geom.Point {
+	return geom.Pt(r.disp.Width(), r.disp.Height())
+}
+
+func (r *Renderer) SetIcon(source ui.ImageSource) {
+	texture, err := r.createTexture(source, false)
+	if err != nil {
+		return
+	}
+	defer texture.Destroy()
+	r.disp.SetIcon(texture.bmp)
 }
 
 func (r *Renderer) SetMouseCursor(c ui.MouseCursor) {
diff --git a/sdlui/renderer.go b/sdlui/renderer.go
index 301633f..c703a8f 100644
--- a/sdlui/renderer.go
+++ b/sdlui/renderer.go
@@ -238,7 +238,7 @@ func (r *Renderer) CreateFontPath(path string, size int) (ui.Font, error) {
 	return &Font{font}, nil
 }
 
-func (r *Renderer) createTexture(source ui.ImageSource, keepSource bool) (ui.Texture, error) {
+func (r *Renderer) createSurface(source ui.ImageSource) (*sdl.Surface, error) {
 	m, err := source.CreateImage()
 	if err != nil {
 		return nil, err
@@ -252,6 +252,14 @@ func (r *Renderer) createTexture(source ui.ImageSource, keepSource bool) (ui.Tex
 	if err != nil {
 		return nil, err
 	}
+	return surface, nil
+}
+
+func (r *Renderer) createTexture(source ui.ImageSource, keepSource bool) (ui.Texture, error) {
+	surface, err := r.createSurface(source)
+	if err != nil {
+		return nil, err
+	}
 	defer surface.Free()
 	texture, err := r.renderer.CreateTextureFromSurface(surface)
 	if err != nil {
@@ -391,6 +399,10 @@ func (r *Renderer) RenderToDisplay() {
 	r.renderer.SetRenderTarget(nil)
 }
 
+func (r *Renderer) Resize(width, height int) {
+	r.window.SetSize(int32(width), int32(height))
+}
+
 func (r *Renderer) SetDrawColor(c sdl.Color) {
 	r.renderer.SetDrawColor(c.R, c.G, c.B, c.A)
 }
@@ -399,14 +411,27 @@ func (r *Renderer) SetDrawColorGo(c color.Color) {
 	r.SetDrawColor(ColorSDL(c))
 }
 
+func (r *Renderer) SetIcon(source ui.ImageSource) {
+	window := r.window
+	if window == nil {
+		return
+	}
+	surface, err := r.createSurface(source)
+	if err != nil {
+		return
+	}
+	defer surface.Free()
+	window.SetIcon(surface)
+}
+
 func (r *Renderer) SetMouseCursor(c ui.MouseCursor) { r.cursor = c }
 
-func (r *Renderer) Size() geom.PointF32 {
+func (r *Renderer) Size() geom.Point {
 	w, h, err := r.renderer.GetOutputSize()
 	if err != nil {
-		return geom.PtF32(geom.NaN32(), geom.NaN32())
+		return geom.ZeroPt
 	}
-	return geom.PtF32(float32(w), float32(h))
+	return geom.Pt(int(w), int(h))
 }
 
 func (r *Renderer) SystemCursor(id sdl.SystemCursor) *sdl.Cursor {
diff --git a/ui/renderer.go b/ui/renderer.go
index 9cfce38..0c2c5ff 100644
--- a/ui/renderer.go
+++ b/ui/renderer.go
@@ -32,8 +32,10 @@ type Renderer interface {
 	Rectangle(r geom.RectangleF32, c color.Color, thickness float32)
 	RenderTo(Texture)
 	RenderToDisplay()
+	Resize(width, height int)
+	SetIcon(source ImageSource)
 	SetMouseCursor(c MouseCursor)
-	Size() geom.PointF32
+	Size() geom.Point
 	Target() Texture
 	Text(font Font, p geom.PointF32, color color.Color, text string)
 	TextAlign(font Font, p geom.PointF32, color color.Color, text string, align HorizontalAlignment)
diff --git a/ui/ui.go b/ui/ui.go
index 737fcfd..576f8a5 100644
--- a/ui/ui.go
+++ b/ui/ui.go
@@ -46,7 +46,7 @@ func RunWait(r Renderer, s *Style, view Control, wait bool) error {
 	ctx.Renderer().Refresh()
 	for !ctx.HasQuit() {
 		var size = r.Size()
-		var bounds = geom.RectF32(0, 0, size.X, size.Y)
+		var bounds = geom.RectF32(0, 0, float32(size.X), float32(size.Y))
 		overlays.Arrange(ctx, bounds, geom.ZeroPtF32, nil)
 		overlays.Render(ctx)
 		if ctx.HasQuit() {