ebiten/internal/graphicsdriver/metal/view.go

124 lines
3.1 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.
//go:build darwin
// +build darwin
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
fullscreen 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
// setting presentsWithTransaction true makes the FPS stable (#1196). We're not sure why...
v.updatePresentsWithTransaction()
}
func (v *view) setFullscreen(fullscreen bool) {
if v.fullscreen == fullscreen {
return
}
v.fullscreen = fullscreen
v.updatePresentsWithTransaction()
}
func (v *view) updatePresentsWithTransaction() {
pwt := v.usePresentsWithTransaction()
v.ml.SetPresentsWithTransaction(pwt)
// 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 pwt {
v.ml.SetMaximumDrawableCount(2)
} else {
v.ml.SetMaximumDrawableCount(3)
}
}
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)
// The vsync state might be reset. Set the state again (#1364).
v.forceSetDisplaySyncEnabled(!v.vsyncDisabled)
v.ml.SetFramebufferOnly(true)
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
}
func (v *view) presentsWithTransaction() bool {
return v.ml.PresentsWithTransaction()
}