ui: Move Now() to internal/loop and hide it

internal/loop/now.go

@@ -0,0 +1,25 @@
+// Copyright 2016 Hajime Hoshi
+//
+// 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.
+
+// +build !js
+
+package loop
+
+import (
+	"time"
+)
+
+func now() int64 {
+	return time.Now().UnixNano()
+}

internal/loop/now_js.go

@@ -0,0 +1,28 @@
+// Copyright 2016 Hajime Hoshi
+//
+// 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.
+
+// +build js
+
+package loop
+
+import (
+	"time"
+
+	"github.com/gopherjs/gopherjs/js"
+)
+
+func now() int64 {
+	// time.Now() is not reliable until GopherJS supports performance.now().
+	return int64(js.Global.Get("performance").Call("now").Float() * float64(time.Millisecond))
+}

internal/loop/run.go

@@ -187,7 +187,7 @@ func Run(g GraphicsContext, width, height, scale int, title string) error {
 	}
 
 	frames := 0
-	n := ui.Now()
+	n := now()
 	beforeForUpdate := n
 	beforeForFPS := n
 	for {
@@ -202,14 +202,14 @@ func Run(g GraphicsContext, width, height, scale int, title string) error {
 		case ui.CloseEvent:
 			return nil
 		case ui.RenderEvent:
-			now := ui.Now()
+			n2 := now()
 			// If beforeForUpdate is too old, we assume that screen is not shown.
-			if int64(5*time.Second/FPS) < now-beforeForUpdate {
+			if int64(5*time.Second/FPS) < n2-beforeForUpdate {
 				currentRunContext.setRunningSlowly(false)
-				beforeForUpdate = now
+				beforeForUpdate = n2
 			} else {
 				// Note that generally t is a little different from 1/60[sec].
-				t := now - beforeForUpdate
+				t := n2 - beforeForUpdate
 				currentRunContext.setRunningSlowly(t*FPS >= int64(time.Second*5/2))
 				tt := int(t * FPS / int64(time.Second))
 				// As t is not accurate 1/60[sec], errors are accumulated.
@@ -228,9 +228,9 @@ func Run(g GraphicsContext, width, height, scale int, title string) error {
 			}
 
 			// Calc the current FPS.
-			if time.Second <= time.Duration(now-beforeForFPS) {
-				currentRunContext.updateFPS(float64(frames) * float64(time.Second) / float64(now-beforeForFPS))
-				beforeForFPS = now
+			if time.Second <= time.Duration(n2-beforeForFPS) {
+				currentRunContext.updateFPS(float64(frames) * float64(time.Second) / float64(n2-beforeForFPS))
+				beforeForFPS = n2
 				frames = 0
 			}
 		default:

internal/ui/ui_glfw.go

@@ -26,10 +26,6 @@ import (
 	"github.com/hajimehoshi/ebiten/internal/graphics/opengl"
 )
 
-func Now() int64 {
-	return time.Now().UnixNano()
-}
-
 type UserInterface struct {
 	window           *glfw.Window
 	width            int

internal/ui/ui_js.go

@@ -18,18 +18,12 @@ package ui
 
 import (
 	"strconv"
-	"time"
 
 	"github.com/gopherjs/gopherjs/js"
 	"github.com/hajimehoshi/ebiten/internal/graphics"
 	"github.com/hajimehoshi/ebiten/internal/graphics/opengl"
 )
 
-func Now() int64 {
-	// time.Now() is not reliable until GopherJS supports performance.now().
-	return int64(js.Global.Get("performance").Call("now").Float() * float64(time.Millisecond))
-}
-
 func (u *UserInterface) SetScreenSize(width, height int) bool {
 	return u.setScreenSize(width, height, u.scale)
 }