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#include <stdlib.h>
#include "eve.h"
#include "eve_font.h"
void eve_font_init(EVEFont *font, uint8_t font_id) {
uint32_t p;
p = eve_read32(EVE_ROM_FONT_ADDR);
p += (148 * (font_id - 16));
font->id = font_id;
font->w = eve_read32(p + 136);
font->h = eve_read32(p + 140);
eve_readb(p, font->w_ch, 128);
}
int eve_font_ch_w(EVEFont *font, ucp_t ch) {
if (ch < 128) return font->w_ch[ch];
return EVE_ERR;
}
static int font_str_w(EVEFont *font, utf8_t *str, int *str_w, size_t *str_len) {
uint16_t r = 0;
size_t len = 0;
ucp_t ch;
int ch_w;
int ch_l;
while (str[len]) {
ch_l = utf8_dec(str + len, &ch);
ch_w = eve_font_ch_w(font, ch);
if (ch_w < 0) {
if (str_w) *str_w = r;
if (str_len) *str_len = len;
return EVE_ERR;
}
r += ch_w;
len += ch_l;
}
if (str_w) *str_w = r;
if (str_len) *str_len = len;
return EVE_OK;
}
static int font_buf_w(EVEFont *font, utf8_t *buf, size_t buf_len, int *str_w, size_t *str_len) {
uint16_t r = 0;
size_t len = 0;
ucp_t ch;
int ch_w;
int ch_l;
while (len < buf_len) {
ch_l = utf8_dec(buf + len, &ch);
ch_w = eve_font_ch_w(font, ch);
if (ch_w < 0) {
if (str_w) *str_w = r;
if (str_len) *str_len = len;
return EVE_ERR;
}
r += ch_w;
len += ch_l;
}
if (str_w) *str_w = r;
if (str_len) *str_len = len;
return EVE_OK;
}
int eve_font_verify(EVEFont *font, utf8_t *str, int *str_w, size_t *str_len) {
int rv;
rv = font_str_w(font, str, str_w, str_len);
return rv;
}
int eve_font_str_w(EVEFont *font, utf8_t *str) {
int str_w, rv;
rv = font_str_w(font, str, &str_w, NULL);
if (rv < 0) return rv;
return str_w;
}
int eve_font_buf_w(EVEFont *font, utf8_t *str, size_t buf_len) {
int buf_w, rv;
rv = font_buf_w(font, str, buf_len, &buf_w, NULL);
if (rv < 0) return rv;
return buf_w;
}
uint8_t eve_font_h(EVEFont *font) {
return font->h;
}
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