driver.hpp

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#pragma once
 
#include <cstddef>
#include <cstdint>
 
namespace epaper {
 
enum class DisplayMode : std::uint8_t {
  BlackWhite, 
  Grayscale4, 
  BWR,        
  BWY,        
  Spectra6    
};
 
[[nodiscard]] constexpr auto bits_per_pixel(DisplayMode mode) noexcept -> std::uint8_t {
  switch (mode) {
  case DisplayMode::BlackWhite:
    return 1;
  case DisplayMode::Grayscale4:
  case DisplayMode::BWR:
  case DisplayMode::BWY:
    return 2;
  case DisplayMode::Spectra6:
    return 3;
  }
  return 1; // Default fallback
}
 
[[nodiscard]] constexpr auto is_color_mode(DisplayMode mode) noexcept -> bool {
  switch (mode) {
  case DisplayMode::BWR:
  case DisplayMode::BWY:
  case DisplayMode::Spectra6:
    return true;
  default:
    return false;
  }
}
 
[[nodiscard]] constexpr auto num_planes(DisplayMode mode) noexcept -> std::size_t {
  switch (mode) {
  case DisplayMode::BlackWhite:
  case DisplayMode::Grayscale4:
    return 1;
  case DisplayMode::BWR:
  case DisplayMode::BWY:
    return 2;
  case DisplayMode::Spectra6:
    return 1; // Spectra6 uses single 3-bit buffer
  }
  return 1;
}
 
} // namespace epaper