ebiten/ui/cocoa/texture_factory.go

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package cocoa
// void* CreateGLContext(void* sharedGLContext);
// void UseGLContext(void* glContext);
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// void UnuseGLContext(void);
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//
import "C"
import (
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"runtime"
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"unsafe"
)
type textureFactory struct {
sharedContext unsafe.Pointer
funcs chan func()
funcsDone chan struct{}
textureFactoryEvents
}
func runTextureFactory() *textureFactory {
t := &textureFactory{
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funcs: make(chan func()),
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funcsDone: make(chan struct{}),
}
ch := make(chan struct{})
go func() {
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runtime.LockOSThread()
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t.sharedContext = C.CreateGLContext(unsafe.Pointer(nil))
close(ch)
t.loop()
}()
<-ch
return t
}
func (t *textureFactory) loop() {
for {
select {
case f := <-t.funcs:
C.UseGLContext(t.sharedContext)
f()
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C.UnuseGLContext()
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t.funcsDone <- struct{}{}
}
}
}
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func (t *textureFactory) useGLContext(f func()) {
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t.funcs <- f
<-t.funcsDone
}
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func (t *textureFactory) createWindow(ui *cocoaUI, width, height, scale int, title string) *Window {
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return runWindow(ui, width, height, scale, title, t.sharedContext)
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}