Refactor block helper

eink.hpp

@@ -33,6 +33,31 @@ class Eink {
 	static io::Pin<DcPin> m_dc;
 	static io::Pin<BusyPin> m_bsy;
 
+	static constexpr auto BLOCK_SIZE = 5;
+
+	enum class Color : uint8_t {
+		BLACK = 0b00,
+		WHITE = 0b01,
+		RED = 0b10,
+		ERROR = 0b11,
+	};
+
+	class ImageBlock {
+	  public:
+		inline Color &operator[](const size_t idx)
+		{
+			return data[idx];
+		}
+
+		inline const Color &operator[](const size_t idx) const
+		{
+			return data[idx];
+		}
+
+	  private:
+		Color data[BLOCK_SIZE];
+	};
+
   public:
 	static void init()
 	{
@@ -113,33 +138,8 @@ class Eink {
 	template <typename Image>
 	static void draw(const Image &image)
 	{
-		constexpr auto BLOCK_SIZE = 5;
-
-		enum class Color : uint8_t {
-			BLACK = 0b00,
-			WHITE = 0b01,
-			RED = 0b10,
-			ERROR = 0b11,
-		};
-
-		class Block {
-		  public:
-			inline Color &operator[](const size_t idx)
-			{
-				return data[idx];
-			}
-
-			inline const Color &operator[](const size_t idx) const
-			{
-				return data[idx];
-			}
-
-		  private:
-			Color data[BLOCK_SIZE];
-		};
-
 		constexpr auto lookup = [](uint8_t bits) {
-			auto block = Block{};
+			auto block = ImageBlock{};
 			for_constexpr(
 			    [&](const auto idx) {
 				    block[idx.value] = static_cast<Color>(bits % 3);