finish ui

1 files changed, 43 insertions, 0 deletions

diff --git a/src/nes/util/button-mask.hh b/src/nes/util/button-mask.hh
new file mode 100644
index 0000000..b010b9e
--- /dev/null
+++ b/src/nes/util/button-mask.hh
@@ -0,0 +1,43 @@
+#pragma once
+
+#include <cstdint>
+
+namespace nes
+{
+	class button_mask
+	{
+		std::uint8_t raw_value_{ 0 };
+
+	public:
+		constexpr explicit button_mask() = default;
+
+		static constexpr auto from_raw_value(std::uint8_t const raw_value) -> button_mask
+		{
+			return button_mask{ raw_value };
+		}
+
+		constexpr auto add(button_mask const other) -> void { raw_value_ |= other.raw_value_; }
+		constexpr auto remove(button_mask const other) -> void { raw_value_ ^= other.raw_value_; }
+		constexpr auto contains(button_mask const other) const -> bool { return (raw_value_ & other.raw_value_) == other.raw_value_; }
+		constexpr auto is_empty() const -> bool { return raw_value_ == 0; }
+		constexpr auto get_raw_value() const -> std::uint8_t { return raw_value_; }
+
+	private:
+		constexpr explicit button_mask(std::uint8_t const raw_value)
+			: raw_value_{ raw_value }
+		{
+		}
+	};
+
+	namespace buttons
+	{
+		static constexpr auto a = button_mask::from_raw_value(1 << 0);
+		static constexpr auto b = button_mask::from_raw_value(1 << 1);
+		static constexpr auto select = button_mask::from_raw_value(1 << 2);
+		static constexpr auto start = button_mask::from_raw_value(1 << 3);
+		static constexpr auto up = button_mask::from_raw_value(1 << 4);
+		static constexpr auto down = button_mask::from_raw_value(1 << 5);
+		static constexpr auto left = button_mask::from_raw_value(1 << 6);
+		static constexpr auto right = button_mask::from_raw_value(1 << 7);
+	} // namespace buttons
+} // namespace nes
\ No newline at end of file