font.h

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#pragma once

#include "esphome/core/datatypes.h"
#include "esphome/core/color.h"
#include "esphome/components/display/display_buffer.h"

namespace esphome {
namespace font {

class Font;

struct GlyphData {
  const uint8_t *a_char;
  const uint8_t *data;
  int offset_x;
  int offset_y;
  int width;
  int height;
};

class Glyph {
 public:
  Glyph(const GlyphData *data) : glyph_data_(data) {}

  const uint8_t *get_char() const;

  bool compare_to(const uint8_t *str) const;

  int match_length(const uint8_t *str) const;

  void scan_area(int *x1, int *y1, int *width, int *height) const;

  const GlyphData *get_glyph_data() const { return this->glyph_data_; }

 protected:
  friend Font;

  const GlyphData *glyph_data_;
};

class Font : public display::BaseFont {
 public:
  Font(const GlyphData *data, int data_nr, int baseline, int height, uint8_t bpp = 1);

  int match_next_glyph(const uint8_t *str, int *match_length);

  void print(int x_start, int y_start, display::Display *display, Color color, const char *text,
             Color background) override;
  void measure(const char *str, int *width, int *x_offset, int *baseline, int *height) override;
  inline int get_baseline() { return this->baseline_; }
  inline int get_height() { return this->height_; }
  inline int get_bpp() { return this->bpp_; }

  const std::vector<Glyph, ExternalRAMAllocator<Glyph>> &get_glyphs() const { return glyphs_; }

 protected:
  std::vector<Glyph, ExternalRAMAllocator<Glyph>> glyphs_;
  int baseline_;
  int height_;
  uint8_t bpp_;  // bits per pixel
};

}  // namespace font
}  // namespace esphome