ui: Remove deviceScale struct

internal/ui/devicescale.go

@@ -1,38 +0,0 @@
-// Copyright 2018 The Ebiten Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-package ui
-
-import (
-	"github.com/hajimehoshi/ebiten/internal/devicescale"
-)
-
-type deviceScale struct {
-	val         float64
-	frame       int64
-	lastUpdated int64
-}
-
-func (d *deviceScale) Update() {
-	d.frame++
-}
-
-func (d *deviceScale) Get() float64 {
-	// As devicescale.DeviceScale accesses OS API, not call this too often.
-	if d.val == 0 || d.frame-d.lastUpdated > 30 {
-		d.val = devicescale.Get()
-		d.lastUpdated = d.frame
-	}
-	return d.val
-}

internal/ui/ui_js.go

@@ -41,7 +41,6 @@ type userInterface struct {
 	windowFocus bool
 	pageVisible bool
 
-	deviceScale     deviceScale
 	lastActualScale float64
 }
 
@@ -175,7 +174,7 @@ func (u *userInterface) actualScreenScale() float64 {
 	// * Chrome just after restoring the lost context
 	// * Safari
 	// Let's use the devicePixelRatio as it is here.
-	return u.getScale() * u.deviceScale.Get()
+	return u.getScale() * deviceScale.GetAt(0, 0)
 }
 
 func (u *userInterface) updateGraphicsContext(g GraphicsContext) {
@@ -233,7 +232,6 @@ func (u *userInterface) loop(g GraphicsContext) error {
 			close(ch)
 			return
 		}
-		u.deviceScale.Update()
 		if u.vsync {
 			requestAnimationFrame.Invoke(cf)
 		} else {