internal/clock: Rename UncappedTPS -> SyncWithFPS

Closes #1726

examples/windowsize/main.go

@@ -209,14 +209,14 @@ func (g *game) Update() error {
 	}
 	if inpututil.IsKeyJustPressed(ebiten.KeyT) {
 		switch tps {
-		case ebiten.UncappedTPS:
+		case ebiten.SyncWithFPS:
 			tps = 30
 		case 30:
 			tps = 60
 		case 60:
 			tps = 120
 		case 120:
-			tps = ebiten.UncappedTPS
+			tps = ebiten.SyncWithFPS
 		default:
 			panic("not reached")
 		}
@@ -293,8 +293,8 @@ func (g *game) Draw(screen *ebiten.Image) {
 	wx, wy := ebiten.WindowPosition()
 	minw, minh, maxw, maxh := ebiten.WindowSizeLimits()
 	cx, cy := ebiten.CursorPosition()
-	tpsStr := "Uncapped"
+	tpsStr := "Sync with FPS"
-	if t := ebiten.MaxTPS(); t != ebiten.UncappedTPS {
+	if t := ebiten.MaxTPS(); t != ebiten.SyncWithFPS {
 		tpsStr = fmt.Sprintf("%d", t)
 	}
 

internal/clock/clock.go

@@ -125,13 +125,13 @@ func updateFPSAndTPS(now int64, count int) {
 	tpsCount = 0
 }
 
-const UncappedTPS = -1
+const SyncWithFPS = -1
 
 // Update updates the inner clock state and returns an integer value
 // indicating how many times the game should update based on given tps.
 // tps represents TPS (ticks per second).
-// If tps is UncappedTPS, Update always returns 1.
+// If tps is SyncWithFPS, Update always returns 1.
-// If tps <= 0 and not UncappedTPS, Update always returns 0.
+// If tps <= 0 and not SyncWithFPS, Update always returns 0.
 //
 // Update is expected to be called per frame.
 func Update(tps int) int {
@@ -146,7 +146,7 @@ func Update(tps int) int {
 	lastNow = n
 
 	c := 0
-	if tps == UncappedTPS {
+	if tps == SyncWithFPS {
 		c = 1
 	} else if tps > 0 {
 		c = calcCountFromTPS(int64(tps), n)

run.go

@@ -364,20 +364,25 @@ func CurrentTPS() float64 {
 	return clock.CurrentTPS()
 }
 
-// UncappedTPS is a special TPS value that means the game doesn't have limitation on TPS.
+// SyncWithFPS is a special TPS value that means TPS syncs with FPS.
-const UncappedTPS = clock.UncappedTPS
+const SyncWithFPS = clock.SyncWithFPS
+
+// UncappedTPS is a special TPS value that means TPS syncs with FPS.
+//
+// Deprecated: as of v2.2. Use SyncWithFPS instead.
+const UncappedTPS = SyncWithFPS
 
 // SetMaxTPS sets the maximum TPS (ticks per second),
 // that represents how many updating function is called per second.
 // The initial value is 60.
 //
-// If tps is UncappedTPS, TPS is uncapped and the game is updated per frame.
+// If tps is SyncWithFPS, TPS is uncapped and the game is updated per frame.
-// If tps is negative but not UncappedTPS, SetMaxTPS panics.
+// If tps is negative but not SyncWithFPS, SetMaxTPS panics.
 //
 // SetMaxTPS is concurrent-safe.
 func SetMaxTPS(tps int) {
-	if tps < 0 && tps != UncappedTPS {
+	if tps < 0 && tps != SyncWithFPS {
-		panic("ebiten: tps must be >= 0 or UncappedTPS")
+		panic("ebiten: tps must be >= 0 or SyncWithFPS")
 	}
 	atomic.StoreInt32(&currentMaxTPS, int32(tps))
 }