// RunWithoutMainLoop runs the game, but don't call the loop on the main (UI) thread.
// Different from Run, this function returns immediately.
//
// Typically, Ebiten users don't have to call this directly.
// Instead, functions in github.com/hajimehoshi/ebiten/mobile module call this.
//
// The size unit is device-independent pixel.
func RunWithoutMainLoop(f func(*Image) error, width, height int, scale float64, title string) <-chan error {
ch := make(chan error)
go func() {
g := newGraphicsContext(f)
theGraphicsContext.Store(g)
if err := loop.Run(g, width, height, scale, title, FPS); err != nil {
ch <- err
}
close(ch)
}()
return ch
}
// Run runs the game.
// f is a function which is called at every frame.
// The argument (*Image) is the render target that represents the screen.
//
// This function must be called from the main thread.
// Note that ebiten bounds the main goroutine to the main OS thread by runtime.LockOSThread.
//
// The given function f is guaranteed to be called 60 times a second
// even if a rendering frame is skipped.
// f is not called when the screen is not shown.
//
// The size unit is device-independent pixel.
func Run(f func(*Image) error, width, height int, scale float64, title string) error {
ch := make(chan error)
go func() {
g := newGraphicsContext(f)
theGraphicsContext.Store(g)
if err := loop.Run(g, width, height, scale, title, FPS); err != nil {
ch <- err
}
close(ch)
}()
// TODO: Use context in Go 1.7?
if err := ui.RunMainThreadLoop(ch); err != nil {
return err
}
return nil
}