text: /**
   * @file lv_draw_label.h
   *
   */
  
  #ifndef LV_DRAW_LABEL_H
  #define LV_DRAW_LABEL_H
  
  #ifdef __cplusplus
  extern "C" {
  #endif
  
  /*********************
   *      INCLUDES
   *********************/
  #include "../lv_misc/lv_bidi.h"
  #include "../lv_misc/lv_txt.h"
  #include "../lv_core/lv_style.h"
  
  /*********************
   *      DEFINES
   *********************/
  #define LV_DRAW_LABEL_NO_TXT_SEL (0xFFFF)
  
  /**********************
   *      TYPEDEFS
   **********************/
  
  typedef struct {
      lv_color_t color;
      lv_color_t sel_color;
      const lv_font_t * font;
      lv_opa_t opa;
      lv_style_int_t line_space;
      lv_style_int_t letter_space;
      uint32_t sel_start;
      uint32_t sel_end;
      lv_coord_t ofs_x;
      lv_coord_t ofs_y;
      lv_bidi_dir_t bidi_dir;
      lv_txt_flag_t flag;
      lv_text_decor_t decor;
      lv_blend_mode_t blend_mode;
  } lv_draw_label_dsc_t;
  
  /** Store some info to speed up drawing of very large texts
   * It takes a lot of time to get the first visible character because
   * all the previous characters needs to be checked to calculate the positions.
   * This structure stores an earlier (e.g. at -1000 px) coordinate and the index of that line.
   * Therefore the calculations can start from here.*/
  typedef struct {
      /** Index of the line at `y` coordinate*/
      int32_t line_start;
  
      /** Give the `y` coordinate of the first letter at `line start` index. Relative to the label's coordinates*/
      int32_t y;
  
      /** The 'y1' coordinate of the label when the hint was saved.
       * Used to invalidate the hint if the label has moved too much. */
      int32_t coord_y;
  } lv_draw_label_hint_t;
  
  /**********************
   * GLOBAL PROTOTYPES
   **********************/
  
  //! @cond Doxygen_Suppress
  
  LV_ATTRIBUTE_FAST_MEM void lv_draw_label_dsc_init(lv_draw_label_dsc_t * dsc);
  
  /**
   * Write a text
   * @param coords coordinates of the label
   * @param mask the label will be drawn only in this area
   * @param dsc pointer to draw descriptor
   * @param txt `\0` terminated text to write
   * @param hint pointer to a `lv_draw_label_hint_t` variable.
   * It is managed by the drawer to speed up the drawing of very long texts (thousands of lines).
   */
  LV_ATTRIBUTE_FAST_MEM void lv_draw_label(const lv_area_t * coords, const lv_area_t * mask, lv_draw_label_dsc_t * dsc,
                                           const char * txt, lv_draw_label_hint_t * hint);
  
  //! @endcond
  /***********************
   * GLOBAL VARIABLES
   ***********************/
  extern const uint8_t _lv_bpp2_opa_table[];
  extern const uint8_t _lv_bpp3_opa_table[];
  extern const uint8_t _lv_bpp1_opa_table[];
  extern const uint8_t _lv_bpp4_opa_table[];
  extern const uint8_t _lv_bpp8_opa_table[];
  
  /**********************
   *      MACROS
   **********************/
  
  #ifdef __cplusplus
  } /* extern "C" */
  #endif
  
  #endif /*LV_DRAW_LABEL_H*/
  