add sdl implementation

1 files changed, 28 insertions, 0 deletions

diff --git a/app/sdl/impl/input-device-keyboard-sdl.hh b/app/sdl/impl/input-device-keyboard-sdl.hh
new file mode 100644
index 0000000..1c38065
--- /dev/null
+++ b/app/sdl/impl/input-device-keyboard-sdl.hh
@@ -0,0 +1,28 @@
+#pragma once
+
+#include "nes/app/input/input-device-keyboard.hh"
+#include "nes/app/input/input-buffer.hh"
+#include <optional>
+
+#include <SDL3/SDL.h>
+
+namespace nes::app::sdl
+{
+	/// Keyboard implementation using SDL.
+	class input_device_keyboard_sdl final : public input_device_keyboard
+	{
+		input_buffer buffer_;
+
+	public:
+		explicit input_device_keyboard_sdl() = default;
+
+		auto handle_key_down(SDL_Event*) -> void;
+		auto handle_key_up(SDL_Event*) -> void;
+
+		auto read_key(key const key) -> bool override { return buffer_.read_key(key); }
+		auto poll_event() -> input_event override { return buffer_.poll_event(); }
+
+	private:
+		auto convert_key(SDL_Scancode) const -> std::optional<key>;
+	};
+} // namespace nes::app::sdl