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118 lines
2.4 KiB
C
118 lines
2.4 KiB
C
/**
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* @file font.h
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*
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*/
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#ifndef FONT_H
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#define FONT_H
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/*********************
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* INCLUDES
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*********************/
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#include "lv_conf.h"
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#include <stdint.h>
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#include <stddef.h>
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/*********************
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* DEFINES
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*********************/
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/**********************
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* TYPEDEFS
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**********************/
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typedef enum
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{
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#if USE_FONT_DEJAVU_8 != 0
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FONT_DEJAVU_8,
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#endif
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#if USE_FONT_DEJAVU_10 != 0
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FONT_DEJAVU_10,
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#endif
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#if USE_FONT_DEJAVU_14 != 0
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FONT_DEJAVU_14,
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#endif
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#if USE_FONT_DEJAVU_20 != 0
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FONT_DEJAVU_20,
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#endif
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#if USE_FONT_DEJAVU_30 != 0
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FONT_DEJAVU_30,
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#endif
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#if USE_FONT_DEJAVU_40 != 0
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FONT_DEJAVU_40,
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#endif
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#if USE_FONT_DEJAVU_60 != 0
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FONT_DEJAVU_60,
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#endif
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#if USE_FONT_DEJAVU_80 != 0
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FONT_DEJAVU_80,
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#endif
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FONT_TYPE_NUM,
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}font_types_t;
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typedef struct
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{
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uint8_t letter_cnt;
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uint8_t start_ascii;
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uint8_t width_byte;
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uint8_t height_row;
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uint8_t fixed_width;
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const uint8_t * width_bit_a;
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const uint8_t * bitmaps_a;
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}font_t;
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/**********************
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* GLOBAL PROTOTYPES
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**********************/
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const font_t * font_get(font_types_t letter);
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/**********************
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* MACROS
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**********************/
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/**
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* Return with the bitmap of a font.
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* @param font_p pointer to a font
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* @param letter a letter
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* @return pointer to the bitmap of the letter
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*/
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static inline const uint8_t * font_get_bitmap(const font_t * font_p, uint8_t letter)
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{
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if(letter < font_p->start_ascii || letter >= font_p->start_ascii + font_p->letter_cnt) return NULL;
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uint32_t index = (letter - font_p->start_ascii) * font_p->height_row * font_p->width_byte;
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return &font_p->bitmaps_a[index];
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}
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/**
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* Get the height of a font
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* @param font_p pointer to a font
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* @return the height of a font
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*/
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static inline uint8_t font_get_height(const font_t * font_p)
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{
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return font_p->height_row;
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}
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/**
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* Get the width of a letter in a font
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* @param font_p pointer to a font
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* @param letter a letter
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* @return the width of a letter
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*/
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static inline uint8_t font_get_width(const font_t * font_p, uint8_t letter)
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{
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if(letter < font_p->start_ascii) return 0;
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letter -= font_p->start_ascii;
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uint8_t w = 0;
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if(letter < font_p->letter_cnt) {
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w = font_p->fixed_width != 0 ? font_p->fixed_width :
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font_p->width_bit_a[letter];
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}
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return w;
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}
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#endif
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