ebiten/internal/graphicsdriver/metal/view_macos.go

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// 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.
//go:build darwin && !ios
// +build darwin,!ios
package metal
// #cgo CFLAGS: -x objective-c
// #cgo LDFLAGS: -framework Foundation
//
// #import <Foundation/Foundation.h>
//
// static int getMacOSMajorVersion() {
// NSOperatingSystemVersion version = [[NSProcessInfo processInfo] operatingSystemVersion];
// return (int)version.majorVersion;
// }
import "C"
import (
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"github.com/hajimehoshi/ebiten/v2/internal/graphicsdriver/metal/mtl"
"github.com/hajimehoshi/ebiten/v2/internal/graphicsdriver/metal/ns"
)
var macOSMajorVersion = int(C.getMacOSMajorVersion())
func (v *view) setWindow(window uintptr) {
// NSView can be updated e.g., fullscreen-state is switched.
v.window = window
v.windowChanged = true
}
func (v *view) setUIView(uiview uintptr) {
panic("metal: setUIView is not available on macOS")
}
func (v *view) update() {
if !v.windowChanged {
return
}
cocoaWindow := ns.NewWindow(v.window)
cocoaWindow.ContentView().SetLayer(v.ml)
cocoaWindow.ContentView().SetWantsLayer(true)
v.windowChanged = false
}
func (v *view) usePresentsWithTransaction() bool {
// On macOS 12 (or later), do not use presentsWithTransaction, or vsync doesn't work (#1885).
// This works only for Metal. Unfortunately, there is not a good solution for OpenGL.
if macOSMajorVersion >= 12 {
return false
}
// Disable presentsWithTransaction on the fullscreen mode (#1745).
return !v.vsyncDisabled
}
func (v *view) maximumDrawableCount() int {
// When presentsWithTransaction is YES and triple buffering is enabled, nextDrawing returns immediately once every two times.
// This makes FPS doubled. To avoid this, disable the triple buffering.
if v.usePresentsWithTransaction() {
return 2
}
return 3
}
const (
storageMode = mtl.StorageModeManaged
resourceStorageMode = mtl.ResourceStorageModeManaged
)