examples/mobile: Enable to run on desktops

examples/mobile/main.go

@@ -12,51 +12,19 @@
 // See the License for the specific language governing permissions and
 // limitations under the License.
 
-// Package mobile is an example of Ebiten for mobiles (Android).
-// You can `gomobile bind` this package but not `gomobile build`.
-package mobile
+// +build !android
+
+package main
 
 import (
-	"math"
+	"log"
 
 	"github.com/hajimehoshi/ebiten"
-	"github.com/hajimehoshi/ebiten/examples/common"
-	"github.com/hajimehoshi/ebiten/mobile"
+	"github.com/hajimehoshi/ebiten/examples/mobile/mobile"
 )
 
-const (
-	screenWidth  = 320
-	screenHeight = 240
-)
-
-var (
-	count        int
-	gophersImage *ebiten.Image
-)
-
-func update(screen *ebiten.Image) error {
-	count++
-	w, h := gophersImage.Size()
-	op := &ebiten.DrawImageOptions{}
-	op.GeoM.Translate(-float64(w)/2, -float64(h)/2)
-	op.GeoM.Rotate(float64(count%360) * 2 * math.Pi / 360)
-	op.GeoM.Translate(screenWidth/2, screenHeight/2)
-	if err := screen.DrawImage(gophersImage, op); err != nil {
-		return err
+func main() {
+	if err := ebiten.Run(mobile.Update, mobile.ScreenWidth, mobile.ScreenHeight, 2, "Mobile (Ebiten Demo)"); err != nil {
+		log.Fatal(err)
 	}
-	return nil
-}
-
-func Start() error {
-	var err error
-	gophersImage, _, err = common.AssetImage("gophers.jpg", ebiten.FilterNearest)
-	if err != nil {
-		return err
-	}
-	mobile.Start(update, screenWidth, screenHeight, 2, "Mobile (Ebiten Demo)")
-	return nil
-}
-
-func Render() error {
-	return mobile.Render()
 }

examples/mobile/main_mobile.go

@@ -0,0 +1,39 @@
+// 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 android
+
+// Package mobile is an example of Ebiten for mobiles (Android).
+// You can `gomobile bind` this package but not `gomobile build`.
+// Please run `gomobile bind` like:
+//
+// Android:
+//   gomobile bind -javapkg [Your package path] -o [AAR file path] github.com/hajimehoshi/ebiten/examples/mobile
+// iOS:
+//   (TBD)
+package mobile
+
+import (
+	example "github.com/hajimehoshi/ebiten/examples/mobile/mobile"
+	"github.com/hajimehoshi/ebiten/mobile"
+)
+
+func Start() error {
+	mobile.Start(example.Update, example.ScreenWidth, example.ScreenHeight, 2, "Mobile (Ebiten Demo)")
+	return nil
+}
+
+func Render() error {
+	return mobile.Render()
+}

examples/mobile/mobile/update.go

@@ -0,0 +1,54 @@
+// 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.
+
+package mobile
+
+import (
+	"log"
+	"math"
+
+	"github.com/hajimehoshi/ebiten"
+	"github.com/hajimehoshi/ebiten/examples/common"
+)
+
+const (
+	ScreenWidth  = 320
+	ScreenHeight = 240
+)
+
+var (
+	count        int
+	gophersImage *ebiten.Image
+)
+
+func init() {
+	var err error
+	gophersImage, _, err = common.AssetImage("gophers.jpg", ebiten.FilterNearest)
+	if err != nil {
+		log.Fatal(err)
+	}
+}
+
+func Update(screen *ebiten.Image) error {
+	count++
+	w, h := gophersImage.Size()
+	op := &ebiten.DrawImageOptions{}
+	op.GeoM.Translate(-float64(w)/2, -float64(h)/2)
+	op.GeoM.Rotate(float64(count%360) * 2 * math.Pi / 360)
+	op.GeoM.Translate(ScreenWidth/2, ScreenHeight/2)
+	if err := screen.DrawImage(gophersImage, op); err != nil {
+		return err
+	}
+	return nil
+}