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/allg5ui/texture.go b/allg5ui/texture.go
index 5def2fe..e8ef97d 100644
--- a/allg5ui/texture.go
+++ b/allg5ui/texture.go
@@ -20,8 +20,8 @@ func (t *texture) Destroy() error {
 	return nil
 }
 
-func (t *texture) Height() float32 {
-	return float32(t.bmp.Height())
+func (t *texture) Height() int {
+	return t.bmp.Height()
 }
 
 func (t *texture) CreateImage() (image.Image, error) {
@@ -31,6 +31,6 @@ func (t *texture) CreateImage() (image.Image, error) {
 	return t.source.CreateImage()
 }
 
-func (t *texture) Width() float32 {
-	return float32(t.bmp.Width())
+func (t *texture) Width() int {
+	return t.bmp.Width()
 }
diff --git a/sdlui/renderer.go b/sdlui/renderer.go
index 301633f..181c5e7 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 {
@@ -493,6 +518,6 @@ func (r *Renderer) SetResourceProvider(resources ui.Resources) {
 
 func (r *Renderer) Image() image.Image { return nil }
 
-func (r *Renderer) Height() float32 { return r.Size().Y }
+func (r *Renderer) Height() int { return r.Size().Y }
 
-func (r *Renderer) Width() float32 { return r.Size().X }
+func (r *Renderer) Width() int { return r.Size().X }
diff --git a/sdlui/texture.go b/sdlui/texture.go
index 84e80f0..709ee9b 100644
--- a/sdlui/texture.go
+++ b/sdlui/texture.go
@@ -5,7 +5,6 @@ import (
 	"image/color"
 
 	"github.com/veandco/go-sdl2/sdl"
-	"opslag.de/schobers/geom"
 	"opslag.de/schobers/zntg/ui"
 )
 
@@ -21,12 +20,12 @@ type Texture struct {
 
 var _ ui.Texture = &Texture{}
 
-func (t *Texture) Height() float32 {
+func (t *Texture) Height() int {
 	_, _, _, height, err := t.Texture.Query()
 	if err != nil {
-		return geom.NaN32()
+		return -1
 	}
-	return float32(height)
+	return int(height)
 }
 
 func (t *Texture) Native() *sdl.Texture { return t.Texture }
@@ -44,12 +43,12 @@ func (t *Texture) Size() (int32, int32, error) {
 	return width, height, err
 }
 
-func (t *Texture) Width() float32 {
+func (t *Texture) Width() int {
 	_, _, width, _, err := t.Texture.Query()
 	if err != nil {
-		return geom.NaN32()
+		return -1
 	}
-	return float32(width)
+	return int(width)
 }
 
 var _ ui.ImageSource = &TextureImageSource{}
diff --git a/ui/button.go b/ui/button.go
index f22134e..c5a2bea 100644
--- a/ui/button.go
+++ b/ui/button.go
@@ -71,7 +71,7 @@ func (b *Button) icon(ctx Context) (Texture, float32, float32) {
 		return nil, 0, 0
 	}
 	icon := ctx.Textures().Texture(b.Icon)
-	iconW, iconH := icon.Width(), icon.Height()
+	iconW, iconH := float32(icon.Width()), float32(icon.Height())
 	if b.IconHeight != 0 {
 		iconW = b.IconHeight * iconW / iconH
 		iconH = b.IconHeight
@@ -213,7 +213,7 @@ func (b *Button) Render(ctx Context) {
 				if scaled != nil {                                    // let the renderer scale
 					icon = scaled
 				}
-				_, iconW = ScaleToHeight(SizeOfTexture(icon), iconH)
+				_, iconW = ScaleToHeight(SizeOfTexture(icon).ToF32(), iconH)
 			}
 			iconOffsetY = .5 * (boundsH - iconH)
 		}
diff --git a/ui/checkbox.go b/ui/checkbox.go
index 50d2bfb..01a45e9 100644
--- a/ui/checkbox.go
+++ b/ui/checkbox.go
@@ -29,7 +29,7 @@ func (c *Checkbox) desiredSize(ctx Context) geom.PointF32 {
 		w += pad + font.WidthOf(c.Text)
 	}
 	icon := c.getOrCreateNormalIcon(ctx)
-	_, iconWidth := ScaleToHeight(SizeOfTexture(icon), h)
+	_, iconWidth := ScaleToHeight(SizeOfTexture(icon).ToF32(), h)
 	w += pad + iconWidth
 	return geom.PtF32(w+pad, pad+h+pad)
 }
@@ -122,7 +122,7 @@ func (c *Checkbox) Render(ctx Context) {
 		if scaledIcon == nil {                                      // let the renderer scale
 			scaledIcon = icon
 		}
-		_, iconWidth := ScaleToHeight(SizeOfTexture(scaledIcon), boundsH)
+		_, iconWidth := ScaleToHeight(SizeOfTexture(scaledIcon).ToF32(), boundsH)
 		rect := geom.RectRelF32(pos.X, pos.Y, iconWidth, boundsH)
 		ctx.Renderer().DrawTextureOptions(scaledIcon, rect, DrawOptions{Tint: iconColor})
 		pos.X += iconWidth + pad
diff --git a/ui/debug.go b/ui/debug.go
index 1fb007c..eda7170 100644
--- a/ui/debug.go
+++ b/ui/debug.go
@@ -91,16 +91,18 @@ func (o *debugOverlay) renderControl(ctx Context, control Control) {
 			return
 		}
 		defer nameTexture.Destroy()
-		renderer.FillRectangle(pos.RectRel2D(nameTexture.Width(), nameTexture.Height()), color.Black)
+		nameTextureWidth := float32(nameTexture.Width())
+		nameTextureHeight := float32(nameTexture.Height())
+		renderer.FillRectangle(pos.RectRel2D(nameTextureWidth, nameTextureHeight), color.Black)
 		renderer.DrawTexturePoint(nameTexture, pos)
-		childPos := pos.Add2D(nameTexture.Width()+8, 0)
+		childPos := pos.Add2D(nameTextureWidth+8, 0)
 		for _, child := range node.Children {
 			if childPos.Y == maxY {
-				childPos.Y = maxY + nameTexture.Height()
+				childPos.Y = maxY + nameTextureHeight
 			}
 			renderHoverNode(childPos, child)
 			maxY = childPos.Y
-			childPos.Y += nameTexture.Height() + 8
+			childPos.Y += nameTextureHeight + 8
 		}
 	}
 	renderHoverNode(geom.PtF32(4, 4), o.hoverNodes)
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/texture.go b/ui/texture.go
index 8234a69..09c887b 100644
--- a/ui/texture.go
+++ b/ui/texture.go
@@ -4,8 +4,8 @@ import "opslag.de/schobers/geom"
 
 type Texture interface {
 	Destroy() error
-	Height() float32
-	Width() float32
+	Height() int
+	Width() int
 }
 
-func SizeOfTexture(t Texture) geom.PointF32 { return geom.PtF32(t.Width(), t.Height()) }
+func SizeOfTexture(t Texture) geom.Point { return geom.Pt(t.Width(), t.Height()) }
diff --git a/ui/textures.go b/ui/textures.go
index b652912..80a7458 100644
--- a/ui/textures.go
+++ b/ui/textures.go
@@ -8,7 +8,7 @@ import (
 )
 
 func ScaleTexture(render Renderer, texture Texture, scale float32) Texture {
-	w := uint(texture.Width() * scale)
+	w := uint(float32(texture.Width()) * scale)
 	if w == 0 {
 		return nil
 	}
@@ -118,7 +118,7 @@ func (t *Textures) Scaled(texture Texture, scale float32) Texture {
 }
 
 func (t *Textures) ScaledHeight(texture Texture, height float32) (Texture, float32) {
-	scale := height / texture.Height()
+	scale := height / float32(texture.Height())
 	if geom.IsNaN32(scale) {
 		return nil, 0
 	}
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() {