graphicsdriver/metal: Add setView for iOS and non-iOS

internal/graphicsdriver/metal/driver.go

@@ -26,7 +26,6 @@ import (
 	"github.com/hajimehoshi/ebiten/internal/graphics"
 	"github.com/hajimehoshi/ebiten/internal/graphicsdriver/metal/ca"
 	"github.com/hajimehoshi/ebiten/internal/graphicsdriver/metal/mtl"
-	"github.com/hajimehoshi/ebiten/internal/graphicsdriver/metal/ns"
 	"github.com/hajimehoshi/ebiten/internal/mainthread"
 )
 
@@ -617,9 +616,7 @@ func (d *Driver) Reset() error {
 func (d *Driver) Draw(indexLen int, indexOffset int, mode graphics.CompositeMode, colorM *affine.ColorM, filter graphics.Filter, address graphics.Address) error {
 	if err := mainthread.Run(func() error {
 		// NSView can be changed anytime (probably). Set this everyframe.
-		cocoaWindow := ns.NewWindow(unsafe.Pointer(d.window))
+		setView(d.window, d.ml)
-		cocoaWindow.ContentView().SetLayer(d.ml)
-		cocoaWindow.ContentView().SetWantsLayer(true)
 
 		rpd := mtl.RenderPassDescriptor{}
 		if d.dst.screen {

internal/graphicsdriver/metal/view_ios.go

@@ -0,0 +1,26 @@
+// Copyright 2019 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.
+
+// +build darwin
+// +build ios
+
+package metal
+
+import (
+	"github.com/hajimehoshi/ebiten/internal/graphicsdriver/metal/ca"
+)
+
+func setView(window uintptr, layer ca.MetalLayer) {
+	// TODO: Implement this
+}

internal/graphicsdriver/metal/view_notios.go

@@ -0,0 +1,31 @@
+// Copyright 2019 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.
+
+// +build darwin
+// +build !ios
+
+package metal
+
+import (
+	"unsafe"
+
+	"github.com/hajimehoshi/ebiten/internal/graphicsdriver/metal/ca"
+	"github.com/hajimehoshi/ebiten/internal/graphicsdriver/metal/ns"
+)
+
+func setView(window uintptr, layer ca.MetalLayer) {
+	cocoaWindow := ns.NewWindow(unsafe.Pointer(window))
+	cocoaWindow.ContentView().SetLayer(layer)
+	cocoaWindow.ContentView().SetWantsLayer(true)
+}