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internal/graphicsdriver/metal: refactoring: initialize the driver at Get

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This commit is contained in:
Hajime Hoshi 2022-06-16 23:52:55 +09:00
parent 7b8ae76f26
commit 195b060911
1 changed files with 22 additions and 18 deletions
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40
internal/graphicsdriver/metal/graphics_darwin.go
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@ -19,6 +19,7 @@ import (
"math"
"sort"
"strings"
"sync"
"unsafe"
"github.com/hajimehoshi/ebiten/v2/internal/graphics"
@ -346,28 +347,31 @@ const (
noStencil
)
// isMetalAvailable reports whether Metal is available or not.
var isMetalAvailable bool
func init() {
if !supportsMetal() {
return
}
// Initialize isMetalAvailable on the main thread.
// On old mac devices like iMac 2011, Metal is not supported (#779).
// TODO: Is there a better way to check whether Metal is available or not?
// It seems OK to call MTLCreateSystemDefaultDevice multiple times, so this should be fine.
if _, ok := mtl.CreateSystemDefaultDevice(); !ok {
return
}
isMetalAvailable = true
}
var (
// isMetalAvailable reports whether Metal is available or not.
isMetalAvailable bool
isMetalAvailableOnce sync.Once
)
var theGraphics Graphics
func Get() *Graphics {
isMetalAvailableOnce.Do(func() {
if !supportsMetal() {
return
}
// Initialize isMetalAvailable on the main thread.
// TODO: Now ui.chooseGraphicsDriver is called on the main thread. Add an assertion.
// On old mac devices like iMac 2011, Metal is not supported (#779).
// TODO: Is there a better way to check whether Metal is available or not?
// It seems OK to call MTLCreateSystemDefaultDevice multiple times, so this should be fine.
if _, ok := mtl.CreateSystemDefaultDevice(); !ok {
return
}
isMetalAvailable = true
})
if !isMetalAvailable {
return nil
}