mobile/ebitenmobileview: Fix build errors

mobile/ebitenmobileview/funcs.go

@@ -12,8 +12,6 @@
 // See the License for the specific language governing permissions and
 // limitations under the License.
 
-// +build android ios
-
 // Package ebitenmobileview offers functions for OpenGL/Metal view of mobiles.
 //
 // The functions are not intended for public usages.

mobile/ebitenmobileview/game.go

@@ -12,15 +12,8 @@
 // See the License for the specific language governing permissions and
 // limitations under the License.
 
-// +build android ios
-
 package ebitenmobileview
 
-// #cgo ios LDFLAGS: -framework UIKit -framework GLKit -framework QuartzCore -framework OpenGLES
-//
-// #include <stdint.h>
-import "C"
-
 import (
 	"sync"
 

mobile/ebitenmobileview/impl_mobile.go

@@ -16,6 +16,11 @@
 
 package ebitenmobileview
 
+// #cgo ios LDFLAGS: -framework UIKit -framework GLKit -framework QuartzCore -framework OpenGLES
+//
+// #include <stdint.h>
+import "C"
+
 import (
 	"errors"
 

mobile/ebitenmobileview/impl_notmobile.go

@@ -12,8 +12,27 @@
 // See the License for the specific language governing permissions and
 // limitations under the License.
 
-// Package ebitenmobileview offers functions for OpenGL/Metal view of mobiles.
-//
-// The functions are not intended for public usages.
-// There is no guarantee of backward compatibility.
+// +build !android
+// +build !ios
+
 package ebitenmobileview
+
+import (
+	"github.com/hajimehoshi/ebiten"
+)
+
+func update() error {
+	return nil
+}
+
+func start(f func(*ebiten.Image) error, width, height int, scale float64) {
+}
+
+func setScreenSize(width, height int, scale float64) {
+}
+
+func updateTouchesOnAndroid(action int, id int, x, y int) {
+}
+
+func updateTouchesOnIOSImpl(phase int, ptr int64, x, y int) {
+}