gb.rs

    pub fn set_speed_callback(&mut self, callback: fn(speed: GameBoySpeed)) {
        self.mmu().set_speed_callback(callback);
    }
}

#[cfg(feature = "wasm")]
#[cfg_attr(feature = "wasm", wasm_bindgen)]
impl GameBoy {
    pub fn set_panic_hook_ws() {
        let prev = take_hook();
        set_hook(Box::new(move |info| {
            hook_impl(info);
            prev(info);
        }));
    }

    pub fn load_rom_ws(&mut self, data: &[u8]) -> Cartridge {
        let rom = self.load_rom(data);
        rom.set_rumble_cb(|active| {
            rumble_callback(active);
        });
        rom.clone()
    }

    pub fn load_callbacks_ws(&mut self) {
        self.set_speed_callback(|speed| {
            speed_callback(speed);
        });
    }

    pub fn load_null_ws(&mut self) {
        let null = Box::<NullDevice>::default();
        self.attach_serial(null);
    }

    pub fn load_logger_ws(&mut self) {
        let mut logger = Box::<StdoutDevice>::default();
        logger.set_callback(|data| {
            logger_callback(data.to_vec());
        });
        self.attach_serial(logger);
    }

    pub fn load_printer_ws(&mut self) {
        let mut printer = Box::<PrinterDevice>::default();
        printer.set_callback(|image_buffer| {
            printer_callback(image_buffer.to_vec());
        });
        self.attach_serial(printer);
    }

    /// Updates the emulation mode using the cartridge
    /// of the provided data to obtain the CGB flag value.
    pub fn infer_mode_ws(&mut self, data: &[u8]) {
        let mode = Cartridge::from_data(data).gb_mode();
        self.set_mode(mode);
    }

    pub fn set_palette_colors_ws(&mut self, value: Vec<JsValue>) {
        let palette: Palette = value
            .into_iter()
            .map(|v| Self::js_to_pixel(&v))
            .collect::<Vec<Pixel>>()
            .try_into()
            .unwrap();
        self.ppu().set_palette_colors(&palette);
    }

    pub fn wasm_engine_ws(&self) -> Option<String> {
        let dependencies = dependencies_map();
        if !dependencies.contains_key("wasm-bindgen") {
            return None;
        }
        Some(String::from(format!(
            "wasm-bindgen/{}",
            *dependencies.get("wasm-bindgen").unwrap()
        )))
    }

    fn js_to_pixel(value: &JsValue) -> Pixel {
        value
            .as_string()
            .unwrap()
            .chars()
            .collect::<Vec<char>>()
            .chunks(2)
            .map(|s| s.iter().collect::<String>())
            .map(|s| u8::from_str_radix(&s, 16).unwrap())
            .collect::<Vec<u8>>()
            .try_into()
            .unwrap()
    }
}

#[cfg(feature = "wasm")]
#[wasm_bindgen]
extern "C" {
    #[wasm_bindgen(js_namespace = window)]
    fn panic(message: &str);

    #[wasm_bindgen(js_namespace = window, js_name = speedCallback)]
    fn speed_callback(speed: GameBoySpeed);

    #[wasm_bindgen(js_namespace = window, js_name = loggerCallback)]
    fn logger_callback(data: Vec<u8>);

    #[wasm_bindgen(js_namespace = window, js_name = printerCallback)]
    fn printer_callback(image_buffer: Vec<u8>);

    #[wasm_bindgen(js_namespace = window, js_name = rumbleCallback)]
    fn rumble_callback(active: bool);
}

#[cfg(feature = "wasm")]
pub fn hook_impl(info: &PanicInfo) {
    let message = info.to_string();
    panic(message.as_str());
}

impl AudioProvider for GameBoy {
    fn audio_output(&self) -> u8 {
        self.apu_i().output()
    }

    fn audio_buffer(&self) -> &VecDeque<u8> {
        self.apu_i().audio_buffer()
    }

    fn clear_audio_buffer(&mut self) {
        self.apu().clear_audio_buffer()
    }
}

impl Default for GameBoy {
    fn default() -> Self {
        Self::new(None)
    }
}

impl Display for GameBoy {
    fn fmt(&self, f: &mut Formatter<'_>) -> fmt::Result {
        write!(f, "{}", self.description(9))
    }
}