ebiten/internal/graphicsdriver/metal/view_darwin.go
2023-10-28 02:43:57 +09:00

105 lines
2.8 KiB
Go

// 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.
package metal
import (
"sync"
"github.com/hajimehoshi/ebiten/v2/internal/graphicsdriver/metal/ca"
"github.com/hajimehoshi/ebiten/v2/internal/graphicsdriver/metal/mtl"
)
type view struct {
window uintptr
uiview uintptr
windowChanged bool
vsyncDisabled bool
device mtl.Device
ml ca.MetalLayer
once sync.Once
}
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) {
if !v.vsyncDisabled == enabled {
return
}
v.forceSetDisplaySyncEnabled(enabled)
}
func (v *view) forceSetDisplaySyncEnabled(enabled bool) {
v.ml.SetDisplaySyncEnabled(enabled)
v.vsyncDisabled = !enabled
if v.vsyncDisabled {
// Apparently 2 makes FPS half. Use 3.
v.ml.SetMaximumDrawableCount(3)
} else {
// Use 2 in a usual case not to cause rendering delays (#2822).
v.ml.SetMaximumDrawableCount(2)
}
}
func (v *view) colorPixelFormat() mtl.PixelFormat {
return v.ml.PixelFormat()
}
func (v *view) initialize(device mtl.Device) error {
v.device = device
ml, err := ca.MakeMetalLayer()
if err != nil {
return err
}
v.ml = ml
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)
// The vsync state might be reset. Set the state again (#1364).
v.forceSetDisplaySyncEnabled(!v.vsyncDisabled)
v.ml.SetFramebufferOnly(true)
// presentsWithTransaction doesn't work in the fullscreen mode (#1745, #1974).
// presentsWithTransaction doesn't work with vsync off (#1196).
// nextDrawable took more than one second if the window has other controls like NSTextView (#1029).
v.ml.SetPresentsWithTransaction(false)
return nil
}
func (v *view) nextDrawable() 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
}