Added audio settings.

TODO.md

@@ -10,7 +10,7 @@
 - [ ] Add more unit tests?
 - [X] Fix z-fighting of monsters.
 - [X] Add exploding animation of monsters.
-- [ ] Add audio settings (music & sound volume).
+- [X] Add audio settings (music & sound volume).
 - [X] Hearts must be saved as well for resume.
 - [ ] Add demo mode.
 - [ ] Add touch controls

cmd/tins2021/appcontext.go

@@ -41,6 +41,9 @@ func newAppContext(ctx ui.Context, settings *tins2021.Settings, score *tins2021.
 		DyingMonsterTextures: map[tins2021.MonsterType]tins2021.AnimatedTexture{},
 	}
 
+	app.Audio.SampleVolume = settings.Audio.SoundVolume
+	app.Audio.MusicVolume = settings.Audio.MusicVolume
+
 	monsterNames := map[tins2021.MonsterType]string{
 		tins2021.MonsterTypeStraight: "straight-walking",
 		tins2021.MonsterTypeRandom:   "random-walking",
@@ -83,6 +86,33 @@ func (app *appContext) PlayNext(ctx ui.Context, controller *levelController) {
 	controller.Play(level)
 }
 
+func (app *appContext) playNextGameMusic(ctx ui.Context) {
+	if app.GameMusic != nil {
+		return
+	}
+	const songs = 4
+	pick := func() int {
+		for {
+			s := rand.Intn(songs) + 1
+			if s == app.GameMusicSong {
+				continue
+			}
+			app.GameMusicSong = s
+			return s
+		}
+	}
+	song := fmt.Sprintf("song_game_%d.mp3", pick())
+	app.GameMusic, _ = app.Audio.PlayMusic(song, func(m *Music) {
+		m.OnFinished = func() {
+			if app.GameMusic == nil {
+				return
+			}
+			app.GameMusic = nil
+			app.playNextGameMusic(ctx)
+		}
+	})
+}
+
 func (app *appContext) PlayResume(ctx ui.Context) {
 	level := tins2021.NewLevel()
 	level.Score = app.Score.Current.Score
@@ -131,31 +161,22 @@ func (app *appContext) ShowMainMenu(ctx ui.Context) {
 	app.show(ctx, newMainMenu(app, ctx))
 }
 
-func (app *appContext) playNextGameMusic(ctx ui.Context) {
+func (app *appContext) setMusicVolume(volume float64) {
-	if app.GameMusic != nil {
+	app.Settings.Audio.MusicVolume = volume
-		return
+	app.Audio.MusicVolume = volume
+	menu := app.MenuMusic
+	if menu != nil {
+		menu.Volume.Volume = volume
 	}
-	const songs = 4
+	game := app.GameMusic
-	pick := func() int {
+	if game != nil {
-		for {
+		game.Volume.Volume = volume
-			s := rand.Intn(songs) + 1
-			if s == app.GameMusicSong {
-				continue
-			}
-			app.GameMusicSong = s
-			return s
 	}
 }
-	song := fmt.Sprintf("song_game_%d.mp3", pick())
+
-	app.GameMusic, _ = app.Audio.PlayMusic(song, func(m *Music) {
+func (app *appContext) setSoundVolume(volume float64) {
-		m.OnFinished = func() {
+	app.Settings.Audio.SoundVolume = volume
-			if app.GameMusic == nil {
+	app.Audio.SampleVolume = volume
-				return
-			}
-			app.GameMusic = nil
-			app.playNextGameMusic(ctx)
-		}
-	})
 }
 
 func (app *appContext) switchToPlayMusic(ctx ui.Context) {

cmd/tins2021/audio.go

@@ -35,8 +35,8 @@ func NewAudioPlayer(resources ui.Resources, prefix string) *AudioPlayer {
 		prefix:       prefix,
 		SampleRate:   rate,
 		Samples:      map[string]Sample{},
-		SampleVolume: 1,
+		SampleVolume: 0,
-		MusicVolume:  1,
+		MusicVolume:  0,
 	}
 }
 
@@ -83,8 +83,8 @@ func (p *AudioPlayer) PlaySample(name string) error {
 	speaker.Play(&effects.Volume{
 		Streamer: p.resample(sample.Stream(), sample.SampleRate),
 		Base:     2,
-		Volume:   float64(sample.Volume),
+		Volume:   p.SampleVolume - sample.Volume,
-		Silent:   false,
+		Silent:   p.SampleVolume == minVolume,
 	})
 	return nil
 }
@@ -106,8 +106,8 @@ func (p *AudioPlayer) PlayMusic(name string, init func(*Music)) (*Music, error)
 		Volume: &effects.Volume{
 			Streamer: p.resample(closer, format.SampleRate),
 			Base:     2,
-			Volume:   1,
+			Volume:   p.MusicVolume,
-			Silent:   false,
+			Silent:   p.MusicVolume == minVolume,
 		},
 	}
 	if init != nil {

cmd/tins2021/mainmenu.go

@@ -44,7 +44,7 @@ func newMainMenu(app *appContext, ctx ui.Context) ui.Control {
 		menu.Add("Resume", func(ctx ui.Context) { app.PlayResume(ctx) })
 	}
 	menu.Add("Highscores", func(ctx ui.Context) { app.ShowHighscores(ctx) })
-	menu.Add("Controls", func(ctx ui.Context) { app.ShowSettings(ctx) })
+	menu.Add("Settings", func(ctx ui.Context) { app.ShowSettings(ctx) })
 	menu.Add("Credits", func(ctx ui.Context) { app.ShowCredits(ctx) })
 	menu.Add("Quit", func(ctx ui.Context) { ctx.Quit() })
 

cmd/tins2021/settings.go

@@ -6,6 +6,7 @@ import (
 	"image/color"
 
 	"github.com/golang/freetype/truetype"
+	"github.com/llgcode/draw2d"
 	"github.com/llgcode/draw2d/draw2dimg"
 	"opslag.de/schobers/geom"
 	"opslag.de/schobers/tins2021"
@@ -13,6 +14,12 @@ import (
 	"opslag.de/schobers/zntg/ui"
 )
 
+const (
+	controlsTypeWASD   = "wasd"
+	controlsTypeArrows = "arrows"
+	controlsTypeCustom = "custom"
+)
+
 const keyboardKeyCornerRadius = .1 * keyboardKeyWidth
 const keyboardKeyHeight = .2 * keyboardLayoutTextureWidth
 const keyboardKeySkew = .15
@@ -20,6 +27,14 @@ const keyboardKeyWidth = .25 * keyboardLayoutTextureWidth
 const keyboardLayoutTextureHeight = 256
 const keyboardLayoutTextureWidth = 2 * keyboardLayoutTextureHeight
 
+const maxVolume = 2
+const minVolume = -8
+
+const volumeControlBarWidth = 154
+const volumeControlKnobWidth = 154
+const volumeControlTextureHeight = 256
+const volumeControlTextureWidth = 2*volumeControlKnobWidth + 2*volumeControlBarWidth
+
 func drawKey(ctx *draw2dimg.GraphicContext, font *truetype.Font, center geom.PointF, key rune, color color.Color) {
 	const cornerRadius = keyboardKeyCornerRadius
 	const keyHeight_5 = .5 * keyboardKeyHeight
@@ -115,6 +130,68 @@ func generateKeys(resources ui.Resources, keys ...keyboardLayoutKey) image.Image
 	return im
 }
 
+func generateVolumeControlTexture() (image.Image, map[string]geom.RectangleF) {
+	im := image.NewRGBA(image.Rect(0, 0, volumeControlTextureWidth, volumeControlTextureHeight))
+	ctx := draw2dimg.NewGraphicContext(im)
+
+	const unitMultiplier = float64(volumeControlTextureHeight)
+	var left float64
+	coord := func(x, y float64) (float64, float64) {
+		return left + x*unitMultiplier, y * unitMultiplier
+	}
+
+	regions := map[string]geom.RectangleF{}
+	ctx.SetFillColor(color.White)
+	ctx.SetStrokeColor(color.White)
+	ctx.SetLineCap(draw2d.SquareCap)
+
+	ctx.SetLineWidth(16)
+	ctx.MoveTo(coord(.1, .5))
+	ctx.LineTo(coord(.4, .2))
+	ctx.LineTo(coord(.52, .32))
+	ctx.LineTo(coord(.52, .68))
+	ctx.LineTo(coord(.4, .8))
+	ctx.Close()
+	ctx.Stroke()
+	regions["leftKnob"] = geom.RectF(0, 0, volumeControlKnobWidth, volumeControlTextureHeight)
+
+	left += volumeControlKnobWidth
+	ctx.SetLineWidth(16)
+	ctx.MoveTo(coord(.1, .2))
+	ctx.LineTo(coord(.3, .0))
+	ctx.LineTo(coord(.5, .2))
+	ctx.LineTo(coord(.5, .8))
+	ctx.LineTo(coord(.3, 1))
+	ctx.LineTo(coord(.1, .8))
+	ctx.Close()
+	ctx.Stroke()
+	regions["bar"] = geom.RectF(left, 0, left+volumeControlBarWidth, volumeControlTextureHeight)
+
+	left += volumeControlBarWidth
+	ctx.MoveTo(coord(.1, .2))
+	ctx.LineTo(coord(.3, .0))
+	ctx.LineTo(coord(.5, .2))
+	ctx.LineTo(coord(.5, .8))
+	ctx.LineTo(coord(.3, 1))
+	ctx.LineTo(coord(.1, .8))
+	ctx.Close()
+	ctx.FillStroke()
+	regions["barFilled"] = geom.RectF(left, 0, left+volumeControlBarWidth, volumeControlTextureHeight)
+
+	left += volumeControlBarWidth
+	ctx.SetLineWidth(16)
+	ctx.MoveTo(coord(.5, .5))
+	ctx.LineTo(coord(.2, .2))
+	ctx.LineTo(coord(.08, .32))
+	ctx.LineTo(coord(.08, .68))
+	ctx.LineTo(coord(.2, .8))
+	ctx.Close()
+	ctx.Stroke()
+	regions["rightKnob"] = geom.RectF(left, 0, left+volumeControlKnobWidth, volumeControlTextureHeight)
+
+	return im, regions
+}
+
 func generateWASDKeys(resources ui.Resources) image.Image {
 	return generateKeys(resources,
 		keyboardLayoutKey{Position: geom.PtF(.45, .25), Key: 'W'},
@@ -130,24 +207,19 @@ type keyboardLayoutKey struct {
 	Highlight bool
 }
 
-type settings struct {
+type keyboardLayoutSettings struct {
-	ui.StackPanel
+	ui.ControlBase
 
 	app *appContext
 
+	Active         bool
 	ActiveLayout   int
 	SelectedLayout int
 
 	SelectingCustom int
 }
 
-const (
+func newKeyboardLayoutSettings(app *appContext, ctx ui.Context) *keyboardLayoutSettings {
-	controlsTypeWASD   = "wasd"
-	controlsTypeArrows = "arrows"
-	controlsTypeCustom = "custom"
-)
-
-func newSettings(app *appContext, ctx ui.Context) *settings {
 	ctx.Textures().CreateTextureGo("layout-wasd", generateWASDKeys(ctx.Resources()), true)
 	ctx.Textures().CreateTextureGo("layout-arrows", generateArrowKeys(ctx.Resources()), true)
 	ctx.Textures().CreateTextureGo("layout-select-1", generateArrowKeysHighlight(ctx.Resources(), [4]bool{true, false, false, false}), true)
@@ -163,42 +235,19 @@ func newSettings(app *appContext, ctx ui.Context) *settings {
 		layout = 2
 	}
 
-	settings := &settings{app: app, ActiveLayout: layout, SelectedLayout: layout}
+	settings := &keyboardLayoutSettings{app: app, ActiveLayout: layout, SelectedLayout: layout}
 	settings.renderCustomLayout(ctx)
 	return settings
 }
 
-var supportedCustomKeys = map[ui.Key]string{
+func (s *keyboardLayoutSettings) DesiredSize(ctx ui.Context, size geom.PointF32) geom.PointF32 {
-	ui.KeyA: "A",
+	scale := tins2021.FindScaleRound(keyboardLayoutTextureWidth, .28*size.X)
-	ui.KeyB: "B",
+	font := ctx.Fonts().Font("default")
-	ui.KeyC: "C",
+	return geom.PtF32(geom.NaN32(), 2*font.Height()+scale*keyboardLayoutTextureHeight)
-	ui.KeyD: "D",
-	ui.KeyE: "E",
-	ui.KeyF: "F",
-	ui.KeyG: "G",
-	ui.KeyH: "H",
-	ui.KeyI: "I",
-	ui.KeyJ: "J",
-	ui.KeyK: "K",
-	ui.KeyL: "L",
-	ui.KeyM: "M",
-	ui.KeyN: "N",
-	ui.KeyO: "O",
-	ui.KeyP: "P",
-	ui.KeyQ: "Q",
-	ui.KeyR: "R",
-	ui.KeyS: "S",
-	ui.KeyT: "T",
-	ui.KeyU: "U",
-	ui.KeyV: "V",
-	ui.KeyW: "W",
-	ui.KeyX: "X",
-	ui.KeyY: "Y",
-	ui.KeyZ: "Z",
 }
 
-func (s *settings) Handle(ctx ui.Context, e ui.Event) bool {
+func (s *keyboardLayoutSettings) Handle(ctx ui.Context, e ui.Event) bool {
-	if s.StackPanel.Handle(ctx, e) {
+	if s.ControlBase.Handle(ctx, e) {
 		return true
 	}
 	switch e := e.(type) {
@@ -241,12 +290,18 @@ func (s *settings) Handle(ctx ui.Context, e ui.Event) bool {
 			s.app.MenuInteraction()
 			return true
 		case ui.KeyLeft:
+			if s.Active {
 				s.setActiveLayout(s.ActiveLayout - 1)
+			}
 		case ui.KeyRight:
+			if s.Active {
 				s.setActiveLayout(s.ActiveLayout + 1)
+			}
 		case ui.KeyEnter:
+			if s.Active {
 				s.selectLayout()
 			}
+		}
 	case *ui.MouseMoveEvent:
 		if s.SelectingCustom == 0 {
 			layout := s.isOverLayout(ctx, e.Pos())
@@ -254,6 +309,7 @@ func (s *settings) Handle(ctx ui.Context, e ui.Event) bool {
 				s.setActiveLayout(layout)
 			}
 		}
+		s.Active = s.IsOver()
 	case *ui.MouseButtonDownEvent:
 		if s.SelectingCustom == 0 {
 			if e.Button == ui.MouseButtonLeft {
@@ -268,34 +324,20 @@ func (s *settings) Handle(ctx ui.Context, e ui.Event) bool {
 	return false
 }
 
-func (s *settings) selectLayout() {
+func (s *keyboardLayoutSettings) isOverLayout(ctx ui.Context, mouse geom.PointF32) int {
-	s.app.MenuInteraction()
-	switch s.ActiveLayout {
-	case 0:
-		s.SelectedLayout = 0
-		s.app.Settings.Controls.Type = controlsTypeWASD
-	case 1:
-		s.SelectedLayout = 1
-		s.app.Settings.Controls.Type = controlsTypeArrows
-	case 2:
-		s.SelectingCustom = 1
-	}
-}
-
-func (s *settings) isOverLayout(ctx ui.Context, mouse geom.PointF32) int {
 	bounds := s.Bounds()
-	center := bounds.Center()
 	width := bounds.Dx()
 
 	scale := tins2021.FindScaleRound(keyboardLayoutTextureWidth, .28*width)
 
 	font := ctx.Fonts().Font("default")
 
+	top := bounds.Min.Y
+	bottom := top + 2*font.Height() + scale*keyboardLayoutTextureHeight
+
 	for i := 0; i < 3; i++ {
 		left := (.04 + .32*float32(i)) * width
 		right := left + .28*width
-		top := center.Y - 2*font.Height()
-		bottom := center.Y + scale*keyboardLayoutTextureWidth
 		if mouse.In(geom.RectF32(left, top, right, bottom)) {
 			return i
 		}
@@ -303,23 +345,37 @@ func (s *settings) isOverLayout(ctx ui.Context, mouse geom.PointF32) int {
 	return -1
 }
 
-func (s *settings) setActiveLayout(layout int) {
+func (s *keyboardLayoutSettings) PostRender(ctx ui.Context) {
-	layout = (layout + 3) % 3
-	change := layout != s.ActiveLayout
-	s.ActiveLayout = (layout + 3) % 3
-	if change {
-		s.app.MenuInteraction()
-	}
-}
-
-func (s *settings) Render(ctx ui.Context) {
 	bounds := s.Bounds()
-	center := bounds.Center()
 	width := bounds.Dx()
 	renderer := ctx.Renderer()
 
 	scale := tins2021.FindScaleRound(keyboardLayoutTextureWidth, .28*width)
+	font := ctx.Fonts().Font("default")
 
+	normalColor := ctx.Style().Palette.Text
+
+	top := bounds.Min.Y
+	layoutTop := top + 2*font.Height()
+
+	if s.SelectingCustom > 0 {
+		renderer.FillRectangle(geom.ZeroPtF32.RectRel(renderer.Size().ToF32()), zntg.MustHexColor(`#000000DF`))
+
+		selectTexture := fmt.Sprintf("layout-select-%d", s.SelectingCustom)
+
+		layoutLeft := .36 * width
+		layoutCenter := layoutLeft + .14*width
+		renderer.TextAlign(font, geom.PtF32(layoutCenter, top), normalColor, "PRESS KEY TO ASSIGN", ui.AlignCenter)
+		renderer.DrawTexturePoint(ctx.Textures().ScaledByName(selectTexture, scale), geom.PtF32(layoutLeft, layoutTop))
+	}
+}
+
+func (s *keyboardLayoutSettings) Render(ctx ui.Context) {
+	bounds := s.Bounds()
+	width := bounds.Dx()
+	renderer := ctx.Renderer()
+
+	scale := tins2021.FindScaleRound(keyboardLayoutTextureWidth, .28*width)
 	font := ctx.Fonts().Font("default")
 
 	layouts := []string{
@@ -332,6 +388,8 @@ func (s *settings) Render(ctx ui.Context) {
 	normalColor := ctx.Style().Palette.Text
 	highlightColor := ctx.Style().Palette.Primary
 
+	top := bounds.Min.Y
+	layoutTop := top + 2*font.Height()
 	for i, layout := range layouts {
 		layoutLeft := (.04 + .32*float32(i)) * width
 		layoutCenter := layoutLeft + .14*width
@@ -345,23 +403,12 @@ func (s *settings) Render(ctx ui.Context) {
 			layoutColor = highlightColor
 		}
 
-		renderer.TextAlign(font, geom.PtF32(layoutCenter, center.Y-2*font.Height()), textColor, layout, ui.AlignCenter)
+		renderer.TextAlign(font, geom.PtF32(layoutCenter, top), textColor, layout, ui.AlignCenter)
-		renderer.DrawTexturePointOptions(ctx.Textures().ScaledByName(layoutTextures[i], scale), geom.PtF32(layoutLeft, center.Y), ui.DrawOptions{Tint: layoutColor})
+		renderer.DrawTexturePointOptions(ctx.Textures().ScaledByName(layoutTextures[i], scale), geom.PtF32(layoutLeft, layoutTop), ui.DrawOptions{Tint: layoutColor})
-	}
-
-	if s.SelectingCustom > 0 {
-		renderer.FillRectangle(bounds, zntg.MustHexColor(`#000000DF`))
-
-		selectTexture := fmt.Sprintf("layout-select-%d", s.SelectingCustom)
-
-		layoutLeft := .36 * width
-		layoutCenter := layoutLeft + .14*width
-		renderer.TextAlign(font, geom.PtF32(layoutCenter, center.Y-2*font.Height()), normalColor, "PRESS KEY TO ASSIGN", ui.AlignCenter)
-		renderer.DrawTexturePoint(ctx.Textures().ScaledByName(selectTexture, scale), geom.PtF32(layoutLeft, center.Y))
 	}
 }
 
-func (s *settings) renderCustomLayout(ctx ui.Context) {
+func (s *keyboardLayoutSettings) renderCustomLayout(ctx ui.Context) {
 	runeOrQuestionMark := func(s string) rune {
 		if len(s) == 0 {
 			return '?'
@@ -377,6 +424,323 @@ func (s *settings) renderCustomLayout(ctx ui.Context) {
 	ctx.Textures().CreateTextureGo("layout-custom", generateCustomKeys(ctx.Resources(), customKeys), true)
 }
 
+func (s *keyboardLayoutSettings) selectLayout() {
+	s.app.MenuInteraction()
+	switch s.ActiveLayout {
+	case 0:
+		s.SelectedLayout = 0
+		s.app.Settings.Controls.Type = controlsTypeWASD
+	case 1:
+		s.SelectedLayout = 1
+		s.app.Settings.Controls.Type = controlsTypeArrows
+	case 2:
+		s.SelectingCustom = 1
+	}
+}
+
+func (s *keyboardLayoutSettings) setActiveLayout(layout int) {
+	layout = (layout + 3) % 3
+	change := layout != s.ActiveLayout
+	s.ActiveLayout = (layout + 3) % 3
+	if change {
+		s.app.MenuInteraction()
+	}
+}
+
+type settings struct {
+	ui.Proxy
+
+	app         *appContext
+	musicVolume *volumeControl
+	soundVolume *volumeControl
+	keyboard    *keyboardLayoutSettings
+}
+
+func newSettings(app *appContext, ctx ui.Context) *settings {
+	volumeControlTexture := generateTextureMapFromImage(ctx.Textures(), "volume-control", generateVolumeControlTexture)
+
+	settings := &settings{app: app,
+		musicVolume: newVolumeControl(app, volumeControlTexture, "Music", app.Settings.Audio.MusicVolume, func(volume float64) { app.setMusicVolume(volume) }),
+		soundVolume: newVolumeControl(app, volumeControlTexture, "Sounds", app.Settings.Audio.SoundVolume, func(volume float64) { app.setSoundVolume(volume) }),
+		keyboard:    newKeyboardLayoutSettings(app, ctx),
+	}
+
+	settings.Content = ui.BuildStackPanel(ui.OrientationVertical, func(p *ui.StackPanel) {
+		p.AddChild(Center(label("SETTINGS", "title")))
+		p.AddChild(label("", "score"))
+		p.AddChild(Center(settings.musicVolume))
+		p.AddChild(label("", "score"))
+		p.AddChild(Center(settings.soundVolume))
+		p.AddChild(label("", "score"))
+		p.AddChild(settings.keyboard)
+	})
+
+	settings.musicVolume.Active = true
+
+	return settings
+}
+
+func (s *settings) currentActive() int {
+	switch {
+	case s.musicVolume.Active:
+		return 0
+	case s.soundVolume.Active:
+		return 1
+	case s.keyboard.Active:
+		return 2
+	default:
+		return 0
+	}
+}
+
+func (s *settings) Handle(ctx ui.Context, e ui.Event) bool {
+	if s.keyboard.Active && s.keyboard.SelectingCustom > 0 {
+		return s.Proxy.Handle(ctx, e)
+	}
+
+	switch e := e.(type) {
+	case *ui.KeyDownEvent:
+		switch e.Key {
+		case ui.KeyUp:
+			s.setActive(s.currentActive() - 1)
+		case ui.KeyDown:
+			s.setActive(s.currentActive() + 1)
+		}
+	}
+
+	return s.Proxy.Handle(ctx, e)
+}
+
+func (s *settings) Render(ctx ui.Context) {
+	s.Proxy.Render(ctx)
+	s.keyboard.PostRender(ctx)
+}
+
+func (s *settings) setActive(active int) {
+	controls := [3]*bool{
+		&s.musicVolume.Active,
+		&s.soundVolume.Active,
+		&s.keyboard.Active,
+	}
+	for active < 0 {
+		active += len(controls)
+	}
+	if active > 0 {
+		active = active % len(controls)
+	}
+	s.app.MenuInteraction()
+
+	for i := range controls {
+		*controls[i] = i == active
+	}
+}
+
 func skewedKeyboardCoordinates(x, y float64) (float64, float64) {
 	return x - keyboardKeySkew*y, y
 }
+
+var supportedCustomKeys = map[ui.Key]string{
+	ui.KeyA: "A",
+	ui.KeyB: "B",
+	ui.KeyC: "C",
+	ui.KeyD: "D",
+	ui.KeyE: "E",
+	ui.KeyF: "F",
+	ui.KeyG: "G",
+	ui.KeyH: "H",
+	ui.KeyI: "I",
+	ui.KeyJ: "J",
+	ui.KeyK: "K",
+	ui.KeyL: "L",
+	ui.KeyM: "M",
+	ui.KeyN: "N",
+	ui.KeyO: "O",
+	ui.KeyP: "P",
+	ui.KeyQ: "Q",
+	ui.KeyR: "R",
+	ui.KeyS: "S",
+	ui.KeyT: "T",
+	ui.KeyU: "U",
+	ui.KeyV: "V",
+	ui.KeyW: "W",
+	ui.KeyX: "X",
+	ui.KeyY: "Y",
+	ui.KeyZ: "Z",
+}
+
+type volumeControl struct {
+	ui.ControlBase
+
+	app     *appContext
+	texture *TextureMap
+
+	Active        bool
+	overLeftKnob  bool
+	overBar       int
+	overRightKnob bool
+
+	Name          string
+	Volume        float64
+	VolumeChanged func(float64)
+}
+
+func newVolumeControl(app *appContext, texture *TextureMap, name string, volume float64, changed func(float64)) *volumeControl {
+	control := &volumeControl{app: app, texture: texture, overBar: -1, Name: name, Volume: volume, VolumeChanged: changed}
+	return control
+}
+
+func (c *volumeControl) changeVolume(delta float64) {
+	c.setVolume(c.Volume + delta)
+}
+
+func (c *volumeControl) setVolume(volume float64) {
+	volume = geom.Min(maxVolume, geom.Max(minVolume, volume))
+	if c.Volume == volume {
+		return
+	}
+	c.Volume = volume
+	c.VolumeChanged(c.Volume)
+	c.app.MenuInteraction()
+}
+
+func (c *volumeControl) DesiredSize(ctx ui.Context, size geom.PointF32) geom.PointF32 {
+	font := ctx.Fonts().Font("default")
+	return geom.PtF32(geom.NaN32(), 2.5*font.Height())
+}
+
+func (c *volumeControl) Handle(ctx ui.Context, e ui.Event) bool {
+	if c.ControlBase.Handle(ctx, e) {
+		return true
+	}
+	switch e := e.(type) {
+	case *ui.KeyDownEvent:
+		switch e.Key {
+		case ui.KeyLeft:
+			if c.Active {
+				c.changeVolume(-1)
+			}
+		case ui.KeyRight:
+			if c.Active {
+				c.changeVolume(1)
+			}
+		}
+	case *ui.MouseMoveEvent:
+		over := c.isOver(ctx, e.Pos())
+		switch over {
+		case -1:
+			c.overLeftKnob = false
+			c.overBar = -1
+			c.overRightKnob = false
+		case 0:
+			if !c.overLeftKnob {
+				c.app.MenuInteraction()
+			}
+			c.overLeftKnob = true
+			c.overBar = -1
+			c.overRightKnob = false
+		case 11:
+			if !c.overRightKnob {
+				c.app.MenuInteraction()
+			}
+			c.overLeftKnob = false
+			c.overBar = -1
+			c.overRightKnob = true
+		default:
+			if over-1 != c.overBar {
+				c.app.MenuInteraction()
+			}
+			c.overLeftKnob = false
+			c.overBar = over - 1
+			c.overRightKnob = false
+		}
+		c.Active = c.IsOver()
+	case *ui.MouseButtonDownEvent:
+		if e.Button == ui.MouseButtonLeft {
+			over := c.isOver(ctx, e.Pos())
+			switch over {
+			case -1:
+			case 0:
+				c.changeVolume(-1)
+			case 11:
+				c.changeVolume(1)
+			default:
+				c.setVolume(float64(over + minVolume))
+			}
+		}
+	}
+	return false
+}
+
+func (c *volumeControl) isOver(ctx ui.Context, p geom.PointF32) int {
+	bounds := c.Bounds()
+	font := ctx.Fonts().Font("default")
+
+	top := bounds.Min.Y + 1.5*font.Height()
+	bottom := top + font.Height()
+	if p.Y < top || p.Y >= bottom {
+		return -1
+	}
+
+	scale := tins2021.FindScaleRound(volumeControlTextureHeight, font.Height())
+	knobWidth := scale * volumeControlKnobWidth
+	barWidth := scale * volumeControlBarWidth
+	left := bounds.Center().X - 5*barWidth - knobWidth
+	if p.X < left {
+		return -1
+	}
+
+	widths := []float32{knobWidth, barWidth, barWidth, barWidth, barWidth, barWidth, barWidth, barWidth, barWidth, barWidth, barWidth, knobWidth}
+	for i, w := range widths {
+		right := left + w
+		if p.X < right {
+			return i
+		}
+		left = right
+	}
+	return -1
+}
+
+func (c *volumeControl) Render(ctx ui.Context) {
+	font := ctx.Fonts().Font("default")
+	scale := tins2021.FindScaleRound(volumeControlTextureHeight, font.Height())
+
+	normalColor := ctx.Style().Palette.Text
+	activeColor := ctx.Style().Palette.Primary
+
+	bounds := c.Bounds()
+	center := bounds.Center()
+	renderer := ctx.Renderer()
+	top := bounds.Min.Y
+	fontColor := normalColor
+	if c.Active {
+		fontColor = activeColor
+	}
+	renderer.TextAlign(font, geom.PtF32(center.X, top), fontColor, c.Name, ui.AlignCenter)
+	tint := func(active bool) color.Color {
+		if active {
+			return activeColor
+		}
+		return nil
+	}
+
+	leftKnob, leftKnobRegion := c.texture.Scaled("leftKnob", scale)
+	leftKnobWidth := leftKnobRegion.Dx()
+	bar, barRegion := c.texture.Scaled("bar", scale)
+	barFilled, barFilledRegion := c.texture.Scaled("barFilled", scale)
+	barWidth := barRegion.Dx()
+	rightKnob, rightKnobRegion := c.texture.Scaled("rightKnob", scale)
+	left := center.X - 5*barWidth - leftKnobWidth
+	top += 1.5 * font.Height()
+	ctx.Renderer().DrawTexturePointOptions(leftKnob, geom.PtF32(left, top), ui.DrawOptions{Source: &leftKnobRegion, Tint: tint(c.overLeftKnob)})
+	left += leftKnobWidth
+	for i := 0; i < 10; i++ {
+		volume := float64(i + minVolume + 1)
+		if volume <= c.Volume {
+			ctx.Renderer().DrawTexturePointOptions(barFilled, geom.PtF32(left, top), ui.DrawOptions{Source: &barFilledRegion, Tint: tint(i == c.overBar)})
+		} else {
+			ctx.Renderer().DrawTexturePointOptions(bar, geom.PtF32(left, top), ui.DrawOptions{Source: &barRegion, Tint: tint(i == c.overBar)})
+		}
+		left += barWidth
+	}
+	ctx.Renderer().DrawTexturePointOptions(rightKnob, geom.PtF32(left, top), ui.DrawOptions{Source: &rightKnobRegion, Tint: tint(c.overRightKnob)})
+}

cmd/tins2021/texturemap.go

@@ -0,0 +1,42 @@
+package main
+
+import (
+	"image"
+
+	"opslag.de/schobers/geom"
+	"opslag.de/schobers/tins2021"
+	"opslag.de/schobers/zntg/ui"
+)
+
+type TextureMap struct {
+	texture tins2021.NamedTexture
+	regions map[string]geom.RectangleF32
+}
+
+func newTextureMapFromImage(textures *ui.Textures, name string, im image.Image, regions map[string]geom.RectangleF) *TextureMap {
+	texture, err := tins2021.CreateNamedTextureImage(textures, name, im)
+	if err != nil {
+		panic(err)
+	}
+	regionMap := map[string]geom.RectangleF32{}
+	for name, region := range regions {
+		regionMap[name] = region.ToF32()
+	}
+	return &TextureMap{
+		texture: texture,
+		regions: regionMap,
+	}
+}
+
+func generateTextureMapFromImage(textures *ui.Textures, name string, generate func() (image.Image, map[string]geom.RectangleF)) *TextureMap {
+	im, regions := generate()
+	return newTextureMapFromImage(textures, name, im, regions)
+}
+
+func (m *TextureMap) Texture(name string) (ui.Texture, geom.RectangleF32) {
+	return m.texture.Texture(), m.regions[name]
+}
+
+func (m *TextureMap) Scaled(name string, scale float32) (ui.Texture, geom.RectangleF32) {
+	return m.texture.Scaled(scale), geom.RectangleF32{Min: m.regions[name].Min.Mul(scale), Max: m.regions[name].Max.Mul(scale)}
+}

settings.go

@@ -8,7 +8,21 @@ import (
 
 const settingsFileName = "settings.json"
 
+type AudioSettings struct {
+	SoundVolume float64
+	MusicVolume float64
+}
+
+type ControlsSettings struct {
+	Type          string
+	MoveDownRight string
+	MoveDownLeft  string
+	MoveUpLeft    string
+	MoveUpRight   string
+}
+
 type Settings struct {
+	Audio    AudioSettings
 	Controls ControlsSettings
 	Window   WindowSettings
 }
@@ -25,14 +39,6 @@ func (s *Settings) Store() error {
 	return SaveUserFileJSON(settingsFileName, s)
 }
 
-type ControlsSettings struct {
-	Type          string
-	MoveDownRight string
-	MoveDownLeft  string
-	MoveUpLeft    string
-	MoveUpRight   string
-}
-
 type WindowSettings struct {
 	Location *geom.Point
 	Size     *geom.Point