Font.hh

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#ifndef COSA_FONT_HH
#define COSA_FONT_HH

#include "Cosa/Types.h"
#include "Canvas.hh"

/*
 * Bitmap font library handler.
 */
class Font {
public:
  const uint8_t WIDTH;
  const uint8_t HEIGHT;
  const uint8_t SPACING;
  uint8_t LINE_SPACING;

  const uint8_t FIRST;
  const uint8_t LAST;

  Font(uint8_t width, uint8_t height,
       uint8_t first, uint8_t last,
       const uint8_t* bitmap,
       uint8_t compression_type = 0,
       uint8_t spacing = 1, uint8_t line_spacing = 1) :
    WIDTH(width),
    HEIGHT(height),
    SPACING(spacing),
    LINE_SPACING(line_spacing),
    FIRST(first),
    LAST(last),
    m_bitmap(bitmap),
    m_compression_type(compression_type)
  {
  }

  bool available(char c)
    __attribute__((always_inline))
  {
    return (c >= FIRST && c <= LAST);
  }

  virtual void draw(Canvas* canvas, char c, uint16_t x, uint16_t y,
                    uint8_t scale);

  class Glyph {
  public:
    Glyph(Font* font, char c = ' ') :
      m_font(font),
      m_char(c)
    {
      begin(c);
    }

    void begin(char c);

    uint8_t next();

  protected:
    Font* m_font;
    char m_char;
    uint8_t m_offset;
    uint8_t m_flags;
    uint8_t* m_bitset;  // in progmem
    uint8_t* m_bitmap;  // in progmem
    uint8_t m_next;
  };

protected:
  const uint8_t* m_bitmap;

  const uint8_t m_compression_type;
};

#endif