Fix syntax

core/core.go

@@ -44,6 +44,7 @@ func Load(sofile string) error {
 		state.Global.Core.UnloadGame()
 		state.Global.Core.Deinit()
 		state.Global.GamePath = ""
+		state.Global.SupportNoGame = false
 		state.Global.CoreRunning = false
 	}
 
@@ -77,7 +78,13 @@ func Load(sofile string) error {
 
 	menu.UpdateOptions(opts)
 
-	log.Println("[Core]: Core loaded: " + si.LibraryName)
+	if state.Global.SupportNoGame {
+		log.Println("[Core]: Core launching: " + si.LibraryName)
+		StartCore()
+	} else {
+		log.Println("[Core]: Core loaded: " + si.LibraryName)
+	}
+
 	return nil
 }
 
@@ -112,6 +119,28 @@ func unzipGame(filename string) (string, int64, error) {
 	return path, size, nil
 }
 
+// StartCore will set the start up the loaded core, with or without a game being loaded first.
+func StartCore() {
+	si := state.Global.Core.GetSystemInfo()
+	avi := state.Global.Core.GetSystemAVInfo()
+
+	vid.Geom = avi.Geometry
+
+	// Append the library name to the window title.
+	if len(si.LibraryName) > 0 {
+		vid.Window.SetTitle("Ludo - " + si.LibraryName)
+	}
+
+	input.Init(vid, menu)
+	audio.Init(int32(avi.Timing.SampleRate))
+	if state.Global.AudioCb.SetState != nil {
+		state.Global.AudioCb.SetState(true)
+	}
+
+	state.Global.CoreRunning = true
+	state.Global.MenuActive = false
+}
+
 // LoadGame loads a game. A core has to be loaded first.
 func LoadGame(filename string) error {
 	si := state.Global.Core.GetSystemInfo()
@@ -135,26 +164,10 @@ func LoadGame(filename string) error {
 		return errors.New("failed to load the game")
 	}
 
-	avi := state.Global.Core.GetSystemAVInfo()
-
-	vid.Geom = avi.Geometry
-
-	// Append the library name to the window title.
-	if len(si.LibraryName) > 0 {
-		vid.Window.SetTitle("Ludo - " + si.LibraryName)
-	}
-
-	input.Init(vid, menu)
-	audio.Init(int32(avi.Timing.SampleRate))
-	if state.Global.AudioCb.SetState != nil {
-		state.Global.AudioCb.SetState(true)
-	}
-
-	state.Global.CoreRunning = true
-	state.Global.MenuActive = false
 	state.Global.GamePath = filename
-
 	log.Println("[Core]: Game loaded: " + filename)
+	StartCore()
+
 	return nil
 }
 

core/environment.go

@@ -47,6 +47,8 @@ func environment(cmd uint32, data unsafe.Pointer) bool {
 		state.Global.FrameTimeCb = libretro.SetFrameTimeCallback(data)
 	case libretro.EnvironmentSetAudioCallback:
 		state.Global.AudioCb = libretro.SetAudioCallback(data)
+	case libretro.EnvironmentSetSupportNoGame:
+		state.Global.SupportNoGame = libretro.GetBool(data)
 	case libretro.EnvironmentGetCanDupe:
 		libretro.SetBool(data, true)
 	case libretro.EnvironmentSetPixelFormat:

libretro/libretro.go

@@ -169,6 +169,7 @@ const (
 	EnvironmentGetUsername          = uint32(C.RETRO_ENVIRONMENT_GET_USERNAME)
 	EnvironmentGetLogInterface      = uint32(C.RETRO_ENVIRONMENT_GET_LOG_INTERFACE)
 	EnvironmentGetCanDupe           = uint32(C.RETRO_ENVIRONMENT_GET_CAN_DUPE)
+	EnvironmentSetSupportNoGame     = uint32(C.RETRO_ENVIRONMENT_SET_SUPPORT_NO_GAME)
 	EnvironmentSetPixelFormat       = uint32(C.RETRO_ENVIRONMENT_SET_PIXEL_FORMAT)
 	EnvironmentGetSystemDirectory   = uint32(C.RETRO_ENVIRONMENT_GET_SYSTEM_DIRECTORY)
 	EnvironmentGetSaveDirectory     = uint32(C.RETRO_ENVIRONMENT_GET_SAVE_DIRECTORY)
@@ -514,6 +515,12 @@ func SetBool(data unsafe.Pointer, val bool) {
 	*b = C.bool(val)
 }
 
+// GetBool is an environment callback helper to get a boolean
+func GetBool(data unsafe.Pointer) bool {
+	b := (*C.bool)(data)
+	return (bool)(*b)
+}
+
 // SetString is an environment callback helper to set a string
 func SetString(data unsafe.Pointer, val string) {
 	s := (**C.char)(data)

state/state.go

@@ -12,6 +12,7 @@ type State struct {
 	Core        libretro.Core // Current libretro core
 	FrameTimeCb libretro.FrameTimeCallback
 	AudioCb     libretro.AudioCallback
+	SupportNoGame bool // When set to true, the core doesn't require content to run
 	CoreRunning bool
 	MenuActive  bool // When set to true, will display the menu layer
 	Verbose     bool