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lvgl/lv_misc/lv_font.c
Gabor Kiss-Vamosi 0d385c237a lv_font: remove const number return values
2018-04-09 12:39:58 +02:00

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/**
* @file lv_font.c
*
*/
/*********************
* INCLUDES
*********************/
#include "../../lv_conf.h"
#include <stddef.h>
#include "lv_font.h"
/*********************
* DEFINES
*********************/
/**********************
* TYPEDEFS
**********************/
typedef struct {
uint32_t glyph_index;
uint32_t unicode;
uint8_t w_px;
}asd_glyph_dsc_t;
/**********************
* STATIC PROTOTYPES
**********************/
/**********************
* STATIC VARIABLES
**********************/
/**********************
* GLOBAL PROTOTYPES
**********************/
/**********************
* MACROS
**********************/
/**********************
* GLOBAL FUNCTIONS
**********************/
/**
* Initialize the built-in fonts
*/
void lv_font_init(void)
{
/*DEJAVU 10*/
#if USE_LV_FONT_DEJAVU_10 != 0
lv_font_add(&lv_font_dejavu_10, NULL);
#endif
#if USE_LV_FONT_DEJAVU_10_LATIN_SUP != 0
#if USE_LV_FONT_DEJAVU_10 != 0
lv_font_add(&lv_font_dejavu_10_latin_sup, &lv_font_dejavu_10);
#else
lv_font_add(&lv_font_dejavu_10_latin_sup, NULL);
#endif
#endif
#if USE_LV_FONT_DEJAVU_10_CYRILLIC != 0
#if USE_LV_FONT_DEJAVU_10 != 0
lv_font_add(&lv_font_dejavu_10_cyrillic, &lv_font_dejavu_10);
#else
lv_font_add(&lv_font_dejavu_10_cyrillic, NULL);
#endif
#endif
/*SYMBOL 10*/
#if USE_LV_FONT_SYMBOL_10 != 0
#if USE_LV_FONT_DEJAVU_10 != 0
lv_font_add(&lv_font_symbol_10, &lv_font_dejavu_10);
#else
lv_font_add(&lv_font_symbol_10, NULL);
#endif
#endif
/*DEJAVU 20*/
#if USE_LV_FONT_DEJAVU_20 != 0
lv_font_add(&lv_font_dejavu_20, NULL);
#endif
#if USE_LV_FONT_DEJAVU_20_LATIN_SUP != 0
#if USE_LV_FONT_DEJAVU_20 != 0
lv_font_add(&lv_font_dejavu_20_latin_sup, &lv_font_dejavu_20);
#else
lv_font_add(&lv_font_symbol_20_latin_sup, NULL);
#endif
#endif
#if USE_LV_FONT_DEJAVU_20_CYRILLIC != 0
#if USE_LV_FONT_DEJAVU_20 != 0
lv_font_add(&lv_font_dejavu_20_cyrillic, &lv_font_dejavu_20);
#else
lv_font_add(&lv_font_dejavu_20_cyrillic, NULL);
#endif
#endif
/*SYMBOL 20*/
#if USE_LV_FONT_SYMBOL_20 != 0
#if USE_LV_FONT_DEJAVU_20 != 0
lv_font_add(&lv_font_symbol_20, &lv_font_dejavu_20);
#else
lv_font_add(&lv_font_symbol_20, NULL);
#endif
#endif
/*DEJAVU 30*/
#if USE_LV_FONT_DEJAVU_30 != 0
lv_font_add(&lv_font_dejavu_30, NULL);
#endif
#if USE_LV_FONT_DEJAVU_30_LATIN_SUP != 0
#if USE_LV_FONT_DEJAVU_30 != 0
lv_font_add(&lv_font_dejavu_30_latin_sup, &lv_font_dejavu_30);
#else
lv_font_add(&lv_font_dejavu_30_latin_sup, NULL);
#endif
#endif
#if USE_LV_FONT_DEJAVU_30_CYRILLIC != 0
#if USE_LV_FONT_DEJAVU_30 != 0
lv_font_add(&lv_font_dejavu_30_cyrillic, &lv_font_dejavu_30);
#else
lv_font_add(&lv_font_dejavu_30_cyrillic, NULL);
#endif
#endif
/*SYMBOL 30*/
#if USE_LV_FONT_SYMBOL_30 != 0
#if USE_LV_FONT_DEJAVU_30 != 0
lv_font_add(&lv_font_symbol_30, &lv_font_dejavu_30);
#else
lv_font_add(&lv_font_symbol_30_basic, NULL);
#endif
#endif
/*DEJAVU 40*/
#if USE_LV_FONT_DEJAVU_40 != 0
lv_font_add(&lv_font_dejavu_40, NULL);
#endif
#if USE_LV_FONT_DEJAVU_40_LATIN_SUP != 0
#if USE_LV_FONT_DEJAVU_40 != 0
lv_font_add(&lv_font_dejavu_40_latin_sup, &lv_font_dejavu_40);
#else
lv_font_add(&lv_font_dejavu_40_latin_sup, NULL);
#endif
#endif
#if USE_LV_FONT_DEJAVU_40_CYRILLIC != 0
#if USE_LV_FONT_DEJAVU_40 != 0
lv_font_add(&lv_font_dejavu_40_cyrillic, &lv_font_dejavu_40);
#else
lv_font_add(&lv_font_dejavu_40_cyrillic, NULL);
#endif
#endif
/*SYMBOL 40*/
#if USE_LV_FONT_SYMBOL_40 != 0
#if USE_LV_FONT_DEJAVU_40 != 0
lv_font_add(&lv_font_symbol_40, &lv_font_dejavu_40);
#else
lv_font_add(&lv_font_symbol_40, NULL);
#endif
#endif
}
/**
* Create a pair from font name and font dsc. get function. After it 'font_get' can be used for this font
* @param name name of the font
* @param dsc_get_fp the font descriptor get function
* @param parent add this font as charter set extension of 'parent'
*/
void lv_font_add(lv_font_t *child, lv_font_t *parent)
{
if(parent == NULL) return;
while(parent->next_page != NULL) {
parent = parent->next_page; /*Got to the last page and add the new font there*/
}
parent->next_page = child;
}
/**
* Return with the bitmap of a font.
* @param font_p pointer to a font
* @param letter a letter
* @return pointer to the bitmap of the letter
*/
const uint8_t * lv_font_get_bitmap(const lv_font_t * font_p, uint32_t letter)
{
const lv_font_t * font_i = font_p;
while(font_i != NULL) {
const uint8_t * bitmap = font_i->get_bitmap(font_i, letter);
if(bitmap) return bitmap;
font_i = font_i->next_page;
}
return NULL;
}
/**
* Get the width of a letter in a font
* @param font_p pointer to a font
* @param letter a letter
* @return the width of a letter
*/
uint8_t lv_font_get_width(const lv_font_t * font_p, uint32_t letter)
{
const lv_font_t * font_i = font_p;
int16_t w;
while(font_i != NULL) {
w = font_i->get_width(font_i, letter);
if(w >= 0) return w;
font_i = font_i->next_page;
}
return 0;
}
/**
* Get the bit-per-pixel of font
* @param font pointer to font
* @param letter a letter from font (font extensions can have different bpp)
* @return bpp of the font (or font extension)
*/
uint8_t lv_font_get_bpp(const lv_font_t * font, uint32_t letter)
{
const lv_font_t * font_i = font;
while(font_i != NULL) {
if(letter >= font_i->unicode_first && letter <= font_i->unicode_last) {
return font_i->bpp;
}
font_i = font_i->next_page;
}
return 0;
}
/**
* Generic bitmap get function used in 'font->get_bitmap' when the font contains all characters in the range
* @param font pointer to font
* @param unicode_letter an unicode letter which bitmap should be get
* @return pointer to the bitmap or NULL if not found
*/
const uint8_t * lv_font_get_bitmap_continuous(const lv_font_t * font, uint32_t unicode_letter)
{
/*Check the range*/
if(unicode_letter < font->unicode_first || unicode_letter > font->unicode_last) return NULL;
uint32_t index = (unicode_letter - font->unicode_first);
return &font->glyph_bitmap[font->glyph_dsc[index].glyph_index];
}
/**
* Generic bitmap get function used in 'font->get_bitmap' when the font NOT contains all characters in the range (sparse)
* @param font pointer to font
* @param unicode_letter an unicode letter which bitmap should be get
* @return pointer to the bitmap or NULL if not found
*/
const uint8_t * lv_font_get_bitmap_sparse(const lv_font_t * font, uint32_t unicode_letter)
{
/*Check the range*/
if(unicode_letter < font->unicode_first || unicode_letter > font->unicode_last) return NULL;
uint32_t i;
for(i = 0; font->unicode_list[i] != 0; i++) {
if(font->unicode_list[i] == unicode_letter) {
return &font->glyph_bitmap[font->glyph_dsc[i].glyph_index];
}
}
return NULL;
}
/**
* Generic glyph width get function used in 'font->get_width' when the font contains all characters in the range
* @param font pointer to font
* @param unicode_letter an unicode letter which width should be get
* @return width of the gylph or -1 if not found
*/
int16_t lv_font_get_width_continuous(const lv_font_t * font, uint32_t unicode_letter)
{
/*Check the range*/
if(unicode_letter < font->unicode_first || unicode_letter > font->unicode_last) {
return -1;
}
uint32_t index = (unicode_letter - font->unicode_first);
return font->glyph_dsc[index].w_px;
}
/**
* Generic glyph width get function used in 'font->get_bitmap' when the font NOT contains all characters in the range (sparse)
* @param font pointer to font
* @param unicode_letter an unicode letter which width should be get
* @return width of the glyph or -1 if not found
*/
int16_t lv_font_get_width_sparse(const lv_font_t * font, uint32_t unicode_letter)
{
/*Check the range*/
if(unicode_letter < font->unicode_first || unicode_letter > font->unicode_last) return -1;
uint32_t i;
for(i = 0; font->unicode_list[i] != 0; i++) {
if(font->unicode_list[i] == unicode_letter) {
return font->glyph_dsc[i].w_px;
}
}
return -1;
}
/**********************
* STATIC FUNCTIONS
**********************/
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