Add ebiten.ScreenScale() (#191)

examples/windowsize/main.go

@@ -32,7 +32,6 @@ const (
 
 var (
 	gophersImage *ebiten.Image
-	screenScale  = initScreenScale
 	keyStates    = map[ebiten.Key]int{
 		ebiten.KeyUp:    0,
 		ebiten.KeyDown:  0,
@@ -51,6 +50,7 @@ func update(screen *ebiten.Image) error {
 		keyStates[key]++
 	}
 	d := 0
+	screenScale := ebiten.ScreenScale()
 	switch screenScale {
 	case 1:
 		d = 32

internal/ui/ui_glfw.go

@@ -97,6 +97,10 @@ func SetScreenScale(scale int) bool {
 	return currentUI.setScreenSize(currentUI.width, currentUI.height, scale)
 }
 
+func ScreenScale() int {
+	return currentUI.scale
+}
+
 func ActualScale() int {
 	return currentUI.actualScale()
 }

internal/ui/ui_js.go

@@ -59,6 +59,10 @@ func SetScreenScale(scale int) bool {
 	return currentUI.setScreenSize(width, height, scale)
 }
 
+func ScreenScale() int {
+	return canvas.Get("dataset").Get("ebitenScale").Int()
+}
+
 func ActualScale() int {
 	return canvas.Get("dataset").Get("ebitenActualScale").Int()
 }

run.go

@@ -165,3 +165,8 @@ func SetScreenScale(scale int) {
 	}
 	runContext.newScreenScale = scale
 }
+
+// ScreenScale returns the current screen scale.
+func ScreenScale() int {
+	return ui.ScreenScale()
+}