Added generic margin.

Refactored Size (on Renderer) to return geom.Point instead of geom.PointF32.
Refactored Width and Height (on Texture) to return int instead of float32.

Refactored texture dimensions to be represented by ints instead of float32s.

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) {

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()
 }

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 }

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{}

ui/button.go

@@ -41,7 +41,7 @@ func BuildIconButton(icon, text string, fn func(b *Button)) *Button {
 
 func (b *Button) desiredSize(ctx Context) geom.PointF32 {
 	var pad = ctx.Style().Dimensions.TextPadding
-	var font = ctx.Fonts().Font(b.FontName(ctx))
+	var font = b.Font_(ctx)
 	var w, h float32 = 0, font.Height()
 
 	icon, iconW, iconH := b.icon(ctx)
@@ -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
@@ -155,6 +155,13 @@ func (b *Button) fillColor(p *Palette) color.Color {
 	return nil
 }
 
+func (b *Button) fontColor(c color.Color) color.Color {
+	if b.Font.Color == nil {
+		return c
+	}
+	return b.Font.Color
+}
+
 func (b *Button) textColor(p *Palette) color.Color {
 	if b.Disabled {
 		if b.Background != nil {
@@ -166,22 +173,19 @@ func (b *Button) textColor(p *Palette) color.Color {
 		}
 		return b.disabledColor(p)
 	}
-	if b.Font.Color != nil {
-		return b.Font.Color
-	}
 	switch b.Type {
 	case ButtonTypeContained:
-		return p.TextOnPrimary
+		return b.fontColor(p.TextOnPrimary)
 	case ButtonTypeIcon:
 		if b.over {
 			if b.HoverColor != nil {
 				return b.HoverColor
 			}
-			return p.Primary
+			return b.fontColor(p.Primary)
 		}
-		return p.Text
+		return b.fontColor(p.Text)
 	default:
-		return p.Primary
+		return b.fontColor(p.Primary)
 	}
 }
 
@@ -213,7 +217,7 @@ 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)
 		}
@@ -221,8 +225,7 @@ func (b *Button) Render(ctx Context) {
 		pos.X += iconW + pad
 	}
 	if len(b.Text) != 0 {
-		fontName := b.FontName(ctx)
-		font := ctx.Fonts().Font(fontName)
+		font := b.Font_(ctx)
 		ctx.Renderer().Text(font, geom.PtF32(pos.X, pos.Y+.5*(boundsH-font.Height())), textColor, b.Text)
 	}
 

ui/checkbox.go

@@ -23,13 +23,13 @@ func BuildCheckbox(text string, fn func(c *Checkbox)) *Checkbox {
 
 func (c *Checkbox) desiredSize(ctx Context) geom.PointF32 {
 	var pad = ctx.Style().Dimensions.TextPadding
-	var font = ctx.Fonts().Font(c.FontName(ctx))
+	font := c.Font_(ctx)
 	var w, h float32 = 0, font.Height()
 	if len(c.Text) != 0 {
 		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)
 }
@@ -122,14 +122,13 @@ 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
 	}
 	if len(c.Text) != 0 {
-		var fontName = c.FontName(ctx)
-		var font = ctx.Fonts().Font(fontName)
+		font := c.Font_(ctx)
 		ctx.Renderer().Text(font, geom.PtF32(pos.X, pos.Y+.5*(boundsH-font.Height())), fore, c.Text)
 	}
 }

ui/containerbase.go

@@ -26,6 +26,15 @@ func (c *ContainerBase) Arrange(ctx Context, bounds geom.RectangleF32, offset ge
 	c.ControlBase.Arrange(ctx, bounds, offset, parent)
 }
 
+func (c *ContainerBase) DesiredSize(ctx Context, size geom.PointF32) geom.PointF32 {
+	var max geom.PointF32
+	for _, child := range c.Children {
+		s := child.DesiredSize(ctx, size)
+		max = geom.MaxPtF32(max, s)
+	}
+	return max
+}
+
 func (c *ContainerBase) Handle(ctx Context, e Event) bool {
 	if c.ControlBase.Handle(ctx, e) {
 		return true

ui/controlbase.go

@@ -188,6 +188,11 @@ func (c *ControlBase) HandleNotify(ctx Context, e Event, notifier Notifier) bool
 	return false
 }
 
+func (c *ControlBase) Font_(ctx Context) Font {
+	name := c.FontName(ctx)
+	return ctx.Fonts().Font(name)
+}
+
 func (c *ControlBase) FontColor(ctx Context, color color.Color) color.Color {
 	if c.Disabled {
 		return ctx.Style().Palette.TextOnDisabled

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+ctx.Style().Dimensions.Margin, 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 + ctx.Style().Dimensions.Margin
 		}
 	}
 	renderHoverNode(geom.PtF32(4, 4), o.hoverNodes)

ui/imagesource.go

@@ -3,6 +3,7 @@ package ui
 import (
 	"image"
 
+	"github.com/nfnt/resize"
 	"opslag.de/schobers/zntg"
 )
 
@@ -45,3 +46,25 @@ func (s ImageSourceResource) CreateImage() (image.Image, error) {
 	}
 	return value.(image.Image), nil
 }
+
+func ImageSourceFromResources(res Resources, name string) ImageSourceResource {
+	return ImageSourceResource{Resources: res, Name: name}
+}
+
+func Scaled(source ImageSource, width, height int) ImageSource {
+	return scaledImageSource{ImageSource: source, width: width, height: height}
+}
+
+type scaledImageSource struct {
+	ImageSource
+
+	width, height int
+}
+
+func (s scaledImageSource) CreateImage() (image.Image, error) {
+	im, err := s.ImageSource.CreateImage()
+	if err != nil {
+		return nil, err
+	}
+	return resize.Resize(uint(s.width), uint(s.height), im, resize.Bicubic), nil
+}

ui/label.go

@@ -1,6 +1,8 @@
 package ui
 
 import (
+	"image/color"
+
 	"opslag.de/schobers/geom"
 )
 
@@ -8,6 +10,7 @@ type Label struct {
 	ControlBase
 
 	Text       string
+	DropShadow color.Color
 
 	desired CachedValue
 }
@@ -25,8 +28,7 @@ func (l *Label) hashDesiredSize(ctx Context) string {
 }
 
 func (l *Label) desiredSize(ctx Context) interface{} {
-	fontName := l.FontName(ctx)
-	font := ctx.Fonts().Font(fontName)
+	font := l.Font_(ctx)
 	width := font.WidthOf(l.Text)
 	height := font.Height()
 	pad := ctx.Style().Dimensions.TextPadding
@@ -37,18 +39,26 @@ func (l *Label) DesiredSize(ctx Context, _ geom.PointF32) geom.PointF32 {
 	return l.desired.GetContext(ctx, l.desiredSize, l.hashDesiredSize).(geom.PointF32)
 }
 
+func (l *Label) getLabelTopLeft(ctx Context) geom.PointF32 {
+	pad := ctx.Style().Dimensions.TextPadding
+	bounds := l.bounds.Inset(pad)
+	switch l.TextAlignment {
+	case AlignRight:
+		return geom.PtF32(bounds.Max.X, bounds.Min.Y)
+	case AlignCenter:
+		return geom.PtF32(.5*(bounds.Min.X+bounds.Max.X), bounds.Min.Y)
+	default:
+		return bounds.Min
+	}
+}
+
 func (l *Label) Render(ctx Context) {
 	l.RenderBackground(ctx)
 	fontColor := l.TextColor(ctx)
 	fontName := l.FontName(ctx)
-	pad := ctx.Style().Dimensions.TextPadding
-	bounds := l.bounds.Inset(pad)
-	switch l.TextAlignment {
-	case AlignLeft:
-		ctx.Fonts().TextAlign(fontName, bounds.Min, fontColor, l.Text, l.TextAlignment)
-	case AlignRight:
-		ctx.Fonts().TextAlign(fontName, geom.PtF32(bounds.Max.X, bounds.Min.Y), fontColor, l.Text, l.TextAlignment)
-	case AlignCenter:
-		ctx.Fonts().TextAlign(fontName, geom.PtF32(.5*(bounds.Min.X+bounds.Max.X), bounds.Min.Y), fontColor, l.Text, l.TextAlignment)
+	topLeft := l.getLabelTopLeft(ctx)
+	if l.DropShadow != nil {
+		ctx.Fonts().TextAlign(fontName, topLeft.Add2D(1, 1), l.DropShadow, l.Text, l.TextAlignment)
 	}
+	ctx.Fonts().TextAlign(fontName, topLeft, fontColor, l.Text, l.TextAlignment)
 }

ui/overflow.go

@@ -23,11 +23,17 @@ type overflow struct {
 	ver *Scrollbar
 }
 
-func Overflow(content Control) Control {
+type ScrollControl interface {
+	Control
+
+	SetScrollbarColor(bar color.Color, hover color.Color)
+}
+
+func Overflow(content Control) ScrollControl {
 	return OverflowBackground(content, nil)
 }
 
-func OverflowBackground(content Control, back color.Color) Control {
+func OverflowBackground(content Control, back color.Color) ScrollControl {
 	var o = &overflow{Proxy: Proxy{Content: content}, Background: back}
 	o.hor = BuildScrollbar(OrientationHorizontal, func(*Scrollbar) {})
 	o.ver = BuildScrollbar(OrientationVertical, func(*Scrollbar) {})
@@ -152,3 +158,10 @@ func (o *overflow) Render(ctx Context) {
 		bar.Render(ctx)
 	})
 }
+
+func (o *overflow) SetScrollbarColor(bar color.Color, hover color.Color) {
+	o.hor.BarColor = bar
+	o.hor.BarHoverColor = hover
+	o.ver.BarColor = bar
+	o.ver.BarHoverColor = hover
+}

ui/paragraph.go

@@ -26,8 +26,7 @@ func BuildParagraph(text string, fn func(*Paragraph)) *Paragraph {
 func fastFormatFloat32(f float32) string { return strconv.FormatFloat(float64(f), 'b', 32, 32) }
 
 func (p *Paragraph) desiredSize(ctx Context) interface{} {
-	fontName := p.FontName(ctx)
-	font := ctx.Fonts().Font(fontName)
+	font := p.Font_(ctx)
 
 	pad := ctx.Style().Dimensions.TextPadding
 	lines := p.splitInLines(ctx, p.width-2*pad)
@@ -43,8 +42,7 @@ func (p *Paragraph) hashTextDesired(ctx Context) string {
 }
 
 func (p *Paragraph) splitInLines(ctx Context, width float32) []string {
-	fontName := p.FontName(ctx)
-	font := ctx.Fonts().Font(fontName)
+	font := p.Font_(ctx)
 
 	spaces := func(s string) []int { // creates a slice with indices where spaces can be found in string s
 		var spaces []int

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)

ui/scrollbar.go

@@ -1,6 +1,8 @@
 package ui
 
 import (
+	"image/color"
+
 	"opslag.de/schobers/geom"
 	"opslag.de/schobers/zntg"
 )
@@ -10,6 +12,8 @@ type Scrollbar struct {
 
 	Orientation Orientation
 
+	BarColor      color.Color
+	BarHoverColor color.Color
 	ContentLength float32
 	ContentOffset float32
 
@@ -58,7 +62,7 @@ func (s *Scrollbar) Handle(ctx Context, e Event) bool {
 
 func (s *Scrollbar) Render(ctx Context) {
 	ctx.Renderer().FillRectangle(s.bounds, zntg.RGBA(0, 0, 0, 1))
-	s.handle.Render(ctx)
+	s.handle.Render(ctx, s)
 }
 
 func (s *Scrollbar) updateBar(ctx Context) {
@@ -83,12 +87,22 @@ type ScrollbarHandle struct {
 	ControlBase
 }
 
-func (h *ScrollbarHandle) Render(ctx Context) {
+func (h *ScrollbarHandle) Render(ctx Context, s *Scrollbar) {
 	h.RenderBackground(ctx)
 	p := ctx.Style().Palette
-	fill := p.Primary
+	var fill color.Color
 	if h.over {
+		if s.BarHoverColor == nil {
 			fill = p.PrimaryLight
+		} else {
+			fill = s.BarHoverColor
+		}
+	} else {
+		if s.BarColor == nil {
+			fill = p.Primary
+		} else {
+			fill = s.BarColor
+		}
 	}
 	ctx.Renderer().FillRectangle(h.bounds.Inset(1), fill)
 }

ui/style.go

@@ -12,6 +12,7 @@ var defaultPalette *Palette
 var defaultStyle *Style
 
 type Dimensions struct {
+	Margin         float32
 	OutlineWidth   float32
 	ScrollbarWidth float32
 	TextPadding    float32
@@ -67,6 +68,7 @@ type Style struct {
 
 func DefaultDimensions() *Dimensions {
 	return &Dimensions{
+		Margin:         8.,
 		OutlineWidth:   2.,
 		ScrollbarWidth: 16.,
 		TextPadding:    8.,

ui/textbox.go

@@ -57,8 +57,7 @@ func (b *TextBox) Arrange(ctx Context, bounds geom.RectangleF32, offset geom.Poi
 }
 
 func (b *TextBox) DesiredSize(ctx Context, _ geom.PointF32) geom.PointF32 {
-	var fontName = b.FontName(ctx)
-	var font = ctx.Fonts().Font(fontName)
+	font := b.Font_(ctx)
 	var width = font.WidthOf(b.Text)
 	var height = font.Height()
 	var pad = b.pad(ctx)
@@ -68,7 +67,7 @@ func (b *TextBox) DesiredSize(ctx Context, _ geom.PointF32) geom.PointF32 {
 func (b *TextBox) mousePosToCaretPos(ctx Context, e MouseEvent) int {
 	p := b.ToControlPosition(e.Pos())
 	offset := p.X - b.box.bounds.Min.X
-	f := ctx.Fonts().Font(b.FontName(ctx))
+	f := b.Font_(ctx)
 	var carets = [3]int{0, 0, len(b.Text)}
 	var offsets = [3]float32{0, 0, f.WidthOf(b.Text)}
 	var updateCenter = func() {
@@ -259,8 +258,7 @@ func (b *TextBox) Render(ctx Context) {
 			back = ctx.Style().Palette.Background
 		}
 		renderer.Clear(back)
-		fontName := b.FontName(ctx)
-		font := ctx.Fonts().Font(fontName)
+		font := b.Font_(ctx)
 		if b.Selection.Start != b.Selection.End {
 			left, right := font.WidthOf(b.Text[:b.Selection.Start]), font.WidthOf(b.Text[:b.Selection.End])
 			renderer.FillRectangle(geom.RectF32(left, 0, right, size.Y), style.Palette.PrimaryHighlight)

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()) }

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
 	}

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() {