Lvgl(V8.2)自定义字体实现多国语言切换功能

https://github.com/adobe-fonts

https://lvgl.io/tools/fontconverter

#include "lvgl/lvgl.h"
#include "lvgl/demos/lv_demos.h"
#include "lv_drivers/display/fbdev.h"
#include "lv_drivers/indev/evdev.h"
#include <unistd.h>
#include <pthread.h>
#include <time.h>
#include <sys/time.h>
#define DISP_BUF_SIZE (128 * 1024)
lv_obj_t *btn ;
lv_obj_t *label;
static void event_handler(lv_event_t * e)
{
 static uint8_t status = 0 ;
 lv_event_code_t code = lv_event_get_code(e);
 if(code == LV_EVENT_CLICKED)
 {
   switch(status)
   {
   case 0:
     lv_label_set_text(label,"こんにちは");
     status = 1 ;
     break ;
   case 1:
     lv_label_set_text(label,"Hallo China");
     status = 2 ;
     break ;
   case 2:
     lv_label_set_text(label,"Привет Китай");
     status = 3 ;
     break ;
   case 3:
     lv_label_set_text(label,"你好中国");
     status = 0 ;
     break ;
   default:
     break ;
   }
 }
}
int main(void)
{
 lv_init();
 fbdev_init();
 static lv_color_t buf[DISP_BUF_SIZE];
 /*Initialize a descriptor for the buffer*/
 static lv_disp_draw_buf_t disp_buf;
 lv_disp_draw_buf_init(&disp_buf, buf, NULL, DISP_BUF_SIZE);
 static lv_disp_drv_t disp_drv;
 lv_disp_drv_init(&disp_drv);
 disp_drv.draw_buf  = &disp_buf;
 disp_drv.flush_cb  = fbdev_flush;
 disp_drv.hor_res  = 480;
 disp_drv.ver_res  = 800;
 lv_disp_drv_register(&disp_drv);
 evdev_init();
 static lv_indev_drv_t indev_drv_1;
 lv_indev_drv_init(&indev_drv_1); 
 indev_drv_1.type = LV_INDEV_TYPE_POINTER;
 indev_drv_1.read_cb = evdev_read;
 lv_indev_t *mouse_indev = lv_indev_drv_register(&indev_drv_1);

 LV_IMG_DECLARE(mouse_cursor_icon)
 lv_obj_t * cursor_obj = lv_img_create(lv_scr_act()); 
 lv_img_set_src(cursor_obj, &mouse_cursor_icon); 
 lv_indev_set_cursor(mouse_indev, cursor_obj); 
 
 //创建一个按钮
 btn = lv_btn_create(lv_scr_act());
 //设置按钮的大小
 lv_obj_set_size(btn, 100, 50);
 //将按钮居中显示
 lv_obj_center(btn);
 //设置按钮默认的背景颜色样式
 lv_obj_set_style_bg_color(btn, lv_color_hex(0xE3EAF4), LV_STATE_DEFAULT);
 //当按钮按下时的背景颜色样式
 lv_obj_set_style_bg_color(btn, lv_color_hex(0x3E6094), LV_STATE_PRESSED);
 //注册按钮事件，点击按钮时，将在event_handler回调函数里进行处理
 lv_obj_add_event_cb(btn, event_handler, LV_EVENT_ALL, NULL);
 //从外部导入自定义字库文件
 LV_FONT_DECLARE(siyuan_black);
 //设置自定义字体样式
 static lv_style_t style_font ;
 lv_style_init(&style_font);
 //创建一个Label标签控件
 label = lv_label_create(lv_scr_act());
 //设置Label的大小
 lv_obj_set_size(label, 200,100);
 //将Label显示的字体样式设置为自定义字体样式
 lv_obj_set_style_text_font(label, &siyuan_black, 0);
 //在Label显示显示内容
 lv_label_set_text(label,"你好中国");
 /*Handle LitlevGL tasks (tickless mode)*/
 while(1) {
   lv_timer_handler();
   usleep(5000);
 }
 return 0;
}

/*基于Liunx的时基产生心跳函数，提供给LVGL用*/
uint32_t custom_tick_get(void)
{
   static uint64_t start_ms = 0;
   if(start_ms == 0) {
     struct timeval tv_start;
     gettimeofday(&tv_start, NULL);
     start_ms = (tv_start.tv_sec * 1000000 + tv_start.tv_usec) / 1000;
   }
   struct timeval tv_now;
   gettimeofday(&tv_now, NULL);
   uint64_t now_ms;
   now_ms = (tv_now.tv_sec * 1000000 + tv_now.tv_usec) / 1000;
   uint32_t time_ms = now_ms - start_ms;
   return time_ms;
 }

https://gitee.com/morixinguan/lvgl_v8.2_for_mcu
https://gitee.com/morixinguan/lvgl_v8.2_for_linux

https://gitee.com/morixinguan/lvgl_v8.2_for_linux