ebiten: use the DB's name for GamepadName

Updates #1949

examples/gamepad/main.go

@@ -163,6 +163,7 @@ func (g *Game) Draw(screen *ebiten.Image) {
 				standard = " (Standard Layout)"
 			}
 			str += fmt.Sprintf("Gamepad (ID: %d, SDL ID: %s)%s:\n", id, ebiten.GamepadSDLID(id), standard)
+			str += fmt.Sprintf("  Name:    %s\n", ebiten.GamepadName(id))
 			str += fmt.Sprintf("  Axes:    %s\n", strings.Join(g.axes[id], ", "))
 			str += fmt.Sprintf("  Buttons: %s\n", strings.Join(g.pressedButtons[id], ", "))
 			if ebiten.IsStandardGamepadLayoutAvailable(id) {

internal/gamepad/gamepad.go

@@ -163,6 +163,9 @@ func (g *Gamepad) update() {
 
 func (g *Gamepad) Name() string {
 	// This is immutable and doesn't have to be protected by a mutex.
+	if name := gamepaddb.Name(g.sdlID); name != "" {
+		return name
+	}
 	return g.name
 }
 

internal/gamepaddb/gamepaddb.go

@@ -126,6 +126,7 @@ type mapping struct {
 }
 
 var (
+	gamepadNames          = map[string]string{}
 	gamepadButtonMappings = map[string]map[driver.StandardGamepadButton]*mapping{}
 	gamepadAxisMappings   = map[string]map[driver.StandardGamepadAxis]*mapping{}
 	mappingsM             sync.RWMutex
@@ -203,6 +204,8 @@ func processLine(line string, platform platform) error {
 		// There is no corresponding button in the Web standard gamepad layout.
 	}
 
+	gamepadNames[id] = tokens[1]
+
 	return nil
 }
 
@@ -378,6 +381,13 @@ type GamepadState interface {
 	Hat(index int) int
 }
 
+func Name(id string) string {
+	mappingsM.RLock()
+	defer mappingsM.RUnlock()
+
+	return gamepadNames[id]
+}
+
 func AxisValue(id string, axis driver.StandardGamepadAxis, state GamepadState) float64 {
 	mappingsM.RLock()
 	defer mappingsM.RUnlock()

internal/uidriver/glfw/gamepad_glfw.go

@@ -119,6 +119,9 @@ func (i *Input) GamepadName(id driver.GamepadID) string {
 	if len(i.gamepads) <= int(id) {
 		return ""
 	}
+	if name := gamepaddb.Name(i.gamepads[id].guid); name != "" {
+		return name
+	}
 	return i.gamepads[id].name
 }
 

internal/uidriver/mobile/input.go

@@ -67,6 +67,9 @@ func (i *Input) GamepadName(id driver.GamepadID) string {
 		if g.ID != id {
 			continue
 		}
+		if name := gamepaddb.Name(g.SDLID); name != "" {
+			return name
+		}
 		return g.Name
 	}
 	return ""