/*****************************************************************************
  | File        :   LVGL_Driver.c
  
  | help        : 
    The provided LVGL library file must be installed first
******************************************************************************/
#include "LVGL_Driver.h"

static lv_disp_draw_buf_t draw_buf;
static lv_color_t buf1[ LVGL_BUF_LEN ];
static lv_color_t buf2[ LVGL_BUF_LEN ];
// static lv_color_t* buf1 = (lv_color_t*) heap_caps_malloc(LVGL_BUF_LEN, MALLOC_CAP_SPIRAM);
// static lv_color_t* buf2 = (lv_color_t*) heap_caps_malloc(LVGL_BUF_LEN, MALLOC_CAP_SPIRAM);
    


/* Serial debugging */
void Lvgl_print(const char * buf)
{
    // Serial.printf(buf);
    // Serial.flush();
}

/*  Display flushing 
    Displays LVGL content on the LCD
    This function implements associating LVGL data to the LCD screen
*/
void Lvgl_Display_LCD( lv_disp_drv_t *disp_drv, const lv_area_t *area, lv_color_t *color_p )
{
  LCD_addWindow(area->x1, area->y1, area->x2, area->y2, ( uint16_t *)&color_p->full);
  lv_disp_flush_ready( disp_drv );
}
/*Read the touchpad*/
void Lvgl_Touchpad_Read( lv_indev_drv_t * indev_drv, lv_indev_data_t * data )
{
  // NULL
}
void example_increase_lvgl_tick(void *arg)
{
    /* Tell LVGL how many milliseconds has elapsed */
    lv_tick_inc(EXAMPLE_LVGL_TICK_PERIOD_MS);
}
void Lvgl_Init(void)
{
  lv_init();
  lv_disp_draw_buf_init( &draw_buf, buf1, buf2, LVGL_BUF_LEN);

  /*Initialize the display*/
  static lv_disp_drv_t disp_drv;
  lv_disp_drv_init( &disp_drv );
  /*Change the following line to your display resolution*/
  disp_drv.hor_res = LVGL_WIDTH;
  disp_drv.ver_res = LVGL_HEIGHT;
  disp_drv.flush_cb = Lvgl_Display_LCD;
  disp_drv.full_refresh = 1;                    /**< 1: Always make the whole screen redrawn*/
  disp_drv.draw_buf = &draw_buf;
  lv_disp_drv_register( &disp_drv );

  /*Initialize the (dummy) input device driver*/
  static lv_indev_drv_t indev_drv;
  lv_indev_drv_init( &indev_drv );
  indev_drv.type = LV_INDEV_TYPE_POINTER;
  indev_drv.read_cb = Lvgl_Touchpad_Read;
  lv_indev_drv_register( &indev_drv );

  /* Create simple label */
  lv_obj_t *label = lv_label_create( lv_scr_act() );
  lv_label_set_text( label, "Hello Ardino and LVGL!");
  lv_obj_align( label, LV_ALIGN_CENTER, 0, 0 );

  const esp_timer_create_args_t lvgl_tick_timer_args = {
    .callback = &example_increase_lvgl_tick,
    .name = "lvgl_tick"
  };
  esp_timer_handle_t lvgl_tick_timer = NULL;
  esp_timer_create(&lvgl_tick_timer_args, &lvgl_tick_timer);
  esp_timer_start_periodic(lvgl_tick_timer, EXAMPLE_LVGL_TICK_PERIOD_MS * 1000);

}
void Timer_Loop(void)
{
  lv_timer_handler(); /* let the GUI do its work */
  // delay( 5 );
}