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.
// +build darwin
// +build !ios
package metal
import (
"github.com/hajimehoshi/ebiten/internal/graphicsdriver/metal/ca"
"github.com/hajimehoshi/ebiten/internal/graphicsdriver/metal/mtl"
"github.com/hajimehoshi/ebiten/internal/graphicsdriver/metal/ns"
)
type view struct {
window uintptr
device mtl.Device
ml ca.MetalLayer
}
func (v *view) setWindow(window uintptr) {
v.window = window
}
func (v *view) setDrawableSize(width, height int) {
v.ml.SetDrawableSize(width, height)
}
func (v *view) getMTLDevice() mtl.Device {
return v.device
}
func (v *view) setDisplaySyncEnabled(enabled bool) {
// TODO: Now SetVsyncEnabled is called only from the main thread, and d.t.Run is not available since
// recursive function call via Run is forbidden.
// Fix this to use d.t.Run to avoid confusion.
v.ml.SetDisplaySyncEnabled(enabled)
}
func (v *view) colorPixelFormat() mtl.PixelFormat {
return v.ml.PixelFormat()
}
func (v *view) reset() error {
var err error
v.device, err = mtl.CreateSystemDefaultDevice()
if err != nil {
return err
}
v.ml = ca.MakeMetalLayer()
v.ml.SetDevice(v.device)
// https://developer.apple.com/documentation/quartzcore/cametallayer/1478155-pixelformat
//
// The pixel format for a Metal layer must be MTLPixelFormatBGRA8Unorm,
// MTLPixelFormatBGRA8Unorm_sRGB, MTLPixelFormatRGBA16Float, MTLPixelFormatBGRA10_XR, or
// MTLPixelFormatBGRA10_XR_sRGB.
v.ml.SetPixelFormat(mtl.PixelFormatBGRA8UNorm)
v.ml.SetMaximumDrawableCount(3)
return nil
}
func (v *view) update() {
// NSView can be changed anytime (probably). Set this everyframe.
cocoaWindow := ns.NewWindow(v.window)
cocoaWindow.ContentView().SetLayer(v.ml)
cocoaWindow.ContentView().SetWantsLayer(true)
}
func (v *view) drawable() ca.MetalDrawable {
d, err := v.ml.NextDrawable()
if err != nil {
// Drawable is nil. This can happen at the initial state. Let's wait and see.
return ca.MetalDrawable{}
}
return d
}