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  /// \param height - pixel character height
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  /// \param height - pixel character height
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  /// \param width  - pixel character width
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  /// \param width  - pixel character width
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  /// \param spacing - character to character spacing
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  /// \param spacing - character to character spacing
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  /// \param chars  - number of characters in character set
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  /// \param chars  - number of characters in character set
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  /// \param data - constant data
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  /// \param data - constant data
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  font_t (uint8_t const height, uint8_t const width,
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  font_t(uint8_t const height, uint8_t const width,
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          uint8_t const spacing, uint8_t const chars,
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         uint8_t const spacing, uint8_t const chars,
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          char const *data) :
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      m_height (height), m_width (width), m_spacing (spacing), m_chars (chars), m_data (
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         char const *data) : m_height(height), m_width(width), m_spacing(spacing), m_chars(chars), m_data(data)
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          data)
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  {
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  {
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  }
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  }
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  virtual char
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  virtual char
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  getPixel (char c, int x, int y) =0;
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  getPixel(char c, int x, int y) = 0;
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  // character width
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  // character width
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  uint8_t
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  uint8_t
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  width ()
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  width()
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  {
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  {
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    return m_width;
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    return m_width;
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  }
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  }
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  // character height
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  // character height
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  uint8_t
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  uint8_t
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  height ()
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  height()
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  {
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  {
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    return m_height;
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    return m_height;
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  }
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  }
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  uint8_t
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  uint8_t
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  chars ()
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  chars()
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  {
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  {
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    return m_chars;
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    return m_chars;
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  }
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  }
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  uint8_t
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  uint8_t
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  spacing ()
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  spacing()
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  {
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  {
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    return m_spacing;
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    return m_spacing;
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  }
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  }
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protected:
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protected:
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  /// @brief Pixel height
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  uint8_t const m_height;
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  uint8_t const m_height;
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  /// @brief Bitmap width
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  uint8_t const m_width;
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  uint8_t const m_width;
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  /// @brief Spacing between characters
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  uint8_t const m_spacing;
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  uint8_t const m_spacing;
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  /// @brief Number of characters in the character set bit map
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  uint8_t const m_chars;
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  uint8_t const m_chars;
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  char const *m_data;
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  char const *m_data;
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};
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};
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class font5x7_t : public font_t
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class font5x7_t : public font_t
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{
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{
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public:
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public:
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  font5x7_t (char const *data) :
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  // one byte of pixels per character row.
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      font_t (7, 5, 6, 96, data)
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  font5x7_t(unsigned char_count, char const *data) : font_t(7, 5, 6, char_count, data){};
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  {
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  }
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  ;
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  char
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  char
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  getPixel (char c, int x, int y) override;
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  getPixel(char c, int x, int y) override;
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 - 
 
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};
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};
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class font10x18_t : public font_t
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class font10x18_t : public font_t
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{
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{
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public:
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public:
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  font10x18_t (char const *data) :
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  // XBM format
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      font_t (18, 10, 10, 96, data)
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  font10x18_t(unsigned char_count, char const *data) : font_t(18, 10, 10, char_count, data){};
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  {
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  }
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  ;
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  char
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  char
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  getPixel (char c, int x, int y) override;
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  getPixel(char c, int x, int y) override;
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};
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};
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// defined fonts
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// defined fonts
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// original 5x7
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// original 5x7
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extern font5x7_t small_font;
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extern font5x7_t small_font;