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