Picklock_RCM/bdk/libs/lvgl/lv_misc/lv_font.c

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2020-06-26 22:17:06 +02:00
/**
* @file lv_font.c
*
*/
/*********************
* INCLUDES
*********************/
#include <stddef.h>
#include "lv_font.h"
#include "lv_log.h"
/*********************
* DEFINES
*********************/
/**********************
* TYPEDEFS
**********************/
/**********************
* STATIC PROTOTYPES
**********************/
/**********************
* STATIC VARIABLES
**********************/
/**********************
* GLOBAL PROTOTYPES
**********************/
/**********************
* MACROS
**********************/
/**********************
* GLOBAL FUNCTIONS
**********************/
/**
* Initialize the fonts
*/
void lv_font_init(void)
{
lv_font_builtin_init();
}
/**
* Add a font to an other to extend the character set.
* @param child the font to add
* @param parent this font will be extended. Using it later will contain the characters from `child`
*/
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;
}
/**
* Remove a font from a character set.
* @param child the font to remove
* @param parent remove `child` from here
*/
void lv_font_remove(lv_font_t * child, lv_font_t * parent)
{
if(parent == NULL) return;
if(child == NULL) return;
while(parent->next_page != child) {
parent = parent->next_page; /*Got to the last page and add the new font there*/
}
parent->next_page = child->next_page;
}
/**
* Tells if font which contains `letter` is monospace or not
* @param font_p point to font
* @param letter an UNICODE character code
* @return true: the letter is monospace; false not monospace
*/
bool lv_font_is_monospace(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) {
/*Glyph found*/
if(font_i->monospace) return true;
return false;
}
font_i = font_i->next_page;
}
return 0;
}
/**
* Return with the bitmap of a font.
* @param font_p pointer to a font
* @param letter an UNICODE character code
* @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. If `monospace` is set then return with it.
* @param font_p pointer to a font
* @param letter an UNICODE character code
* @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) {
/*Glyph found*/
uint8_t m = font_i->monospace;
if(m) w = m;
return w;
}
font_i = font_i->next_page;
}
return 0;
}
/**
* Get the width of the letter without overwriting it with the `monospace` attribute
* @param font_p pointer to a font
* @param letter an UNICODE character code
* @return the width of a letter
*/
uint8_t lv_font_get_real_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
**********************/