mirror of
https://github.com/hajimehoshi/ebiten.git
synced 2024-09-20 05:12:18 +02:00
100 lines
2.7 KiB
Go
100 lines
2.7 KiB
Go
// Copyright 2019 The Ebiten Authors
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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package metal
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import (
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"sync"
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"github.com/hajimehoshi/ebiten/v2/internal/graphicsdriver/metal/ca"
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"github.com/hajimehoshi/ebiten/v2/internal/graphicsdriver/metal/mtl"
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)
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type view struct {
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window uintptr
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uiview uintptr
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windowChanged bool
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vsyncDisabled bool
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device mtl.Device
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ml ca.MetalLayer
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once sync.Once
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}
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func (v *view) setDrawableSize(width, height int) {
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v.ml.SetDrawableSize(width, height)
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}
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func (v *view) getMTLDevice() mtl.Device {
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return v.device
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}
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func (v *view) setDisplaySyncEnabled(enabled bool) {
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if !v.vsyncDisabled == enabled {
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return
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}
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v.forceSetDisplaySyncEnabled(enabled)
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}
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func (v *view) forceSetDisplaySyncEnabled(enabled bool) {
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v.ml.SetDisplaySyncEnabled(enabled)
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v.vsyncDisabled = !enabled
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// Always use 3. There are some situations that the FPS becomes half, or the FPS becomes too low (#2880).
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v.ml.SetMaximumDrawableCount(3)
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}
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func (v *view) colorPixelFormat() mtl.PixelFormat {
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return v.ml.PixelFormat()
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}
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func (v *view) initialize(device mtl.Device) error {
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v.device = device
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ml, err := ca.MakeMetalLayer()
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if err != nil {
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return err
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}
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v.ml = ml
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v.ml.SetDevice(v.device)
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// https://developer.apple.com/documentation/quartzcore/cametallayer/1478155-pixelformat
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//
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// The pixel format for a Metal layer must be MTLPixelFormatBGRA8Unorm,
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// MTLPixelFormatBGRA8Unorm_sRGB, MTLPixelFormatRGBA16Float, MTLPixelFormatBGRA10_XR, or
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// MTLPixelFormatBGRA10_XR_sRGB.
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v.ml.SetPixelFormat(mtl.PixelFormatBGRA8UNorm)
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// The vsync state might be reset. Set the state again (#1364).
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v.forceSetDisplaySyncEnabled(!v.vsyncDisabled)
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v.ml.SetFramebufferOnly(true)
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// presentsWithTransaction doesn't work in the fullscreen mode (#1745, #1974).
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// presentsWithTransaction doesn't work with vsync off (#1196).
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// nextDrawable took more than one second if the window has other controls like NSTextView (#1029).
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v.ml.SetPresentsWithTransaction(false)
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return nil
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}
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func (v *view) nextDrawable() ca.MetalDrawable {
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d, err := v.ml.NextDrawable()
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if err != nil {
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// Drawable is nil. This can happen at the initial state. Let's wait and see.
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return ca.MetalDrawable{}
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}
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return d
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}
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