/*******************************************************************************
 * LVGL Benchmark
 * This is a benchmark demo for LVGL - Light and Versatile Graphics Library
 * import from: https://github.com/lvgl/lv_demos.git
 *
 * Dependent libraries:
 * LVGL: https://github.com/lvgl/lvgl.git
 *
 * LVGL Configuration file:
 * Copy your_arduino_path/libraries/lvgl/lv_conf_template.h
 * to your_arduino_path/libraries/lv_conf.h
 * Then find and set:
 * #define LV_COLOR_DEPTH     16
 * #define LV_TICK_CUSTOM     1
 * 
 * For SPI display set color swap can be faster, parallel screen don't set!
 * #define LV_COLOR_16_SWAP   1
 * 
 * Optional: Show CPU usage and FPS count
 * #define LV_USE_PERF_MONITOR 1
 ******************************************************************************/
//#include "lv_demo_benchmark.h"
#include <lvgl.h>
#include <demos/lv_demos.h>
/*******************************************************************************
 ******************************************************************************/
#include <Arduino_GFX_Library.h>

#define GFX_BL DF_GFX_BL // default backlight pin, you may replace DF_GFX_BL to actual backlight pin
#define TFT_BL 27
/* More dev device declaration: https://github.com/moononournation/Arduino_GFX/wiki/Dev-Device-Declaration */
#if defined(DISPLAY_DEV_KIT)
Arduino_GFX *gfx = create_default_Arduino_GFX();
#else /* !defined(DISPLAY_DEV_KIT) */

/* More data bus class: https://github.com/moononournation/Arduino_GFX/wiki/Data-Bus-Class */
//Arduino_DataBus *bus = create_default_Arduino_DataBus();

/* More display class: https://github.com/moononournation/Arduino_GFX/wiki/Display-Class */
//Arduino_GFX *gfx = new Arduino_ILI9341(bus, DF_GFX_RST, 0 /* rotation */, false /* IPS */);

//Arduino_DataBus *bus = new Arduino_ESP32SPI(11 /* DC */, 10 /* CS */, 12 /* SCK */, 13 /* MOSI */, GFX_NOT_DEFINED /* MISO */);
//Arduino_GFX *gfx = new Arduino_ST7789(bus, 1 /* RST */, 1 /* rotation */, true /* IPS */, 170 /* width */, 320 /* height */, 35 /* col offset 1 */, 0 /* row offset 1 */, 35 /* col offset 2 */, 0 /* row offset 2 */);
Arduino_DataBus *bus = new Arduino_ESP32SPI(2 /* DC */, 15 /* CS */, 14 /* SCK */, 13 /* MOSI */, GFX_NOT_DEFINED /* MISO */);
Arduino_GFX *gfx = new Arduino_ST7789(bus, -1 /* RST */, 1 /* rotation */, true /* IPS */);
  
#endif /* !defined(DISPLAY_DEV_KIT) */
/*******************************************************************************
 * End of Arduino_GFX setting
 ******************************************************************************/

/* Change to your screen resolution */
static uint32_t screenWidth;
static uint32_t screenHeight;
static lv_disp_draw_buf_t draw_buf;
static lv_color_t *disp_draw_buf;
//static lv_color_t *disp_draw_buf2;
static lv_disp_drv_t disp_drv;
static unsigned long last_ms;

/* Display flushing */
void my_disp_flush(lv_disp_drv_t *disp, const lv_area_t *area, lv_color_t *color_p)
{
   uint32_t w = (area->x2 - area->x1 + 1);
   uint32_t h = (area->y2 - area->y1 + 1);

#if (LV_COLOR_16_SWAP != 0)
   gfx->draw16bitBeRGBBitmap(area->x1, area->y1, (uint16_t *)&color_p->full, w, h);
#else
   gfx->draw16bitRGBBitmap(area->x1, area->y1, (uint16_t *)&color_p->full, w, h);
#endif

   lv_disp_flush_ready(disp);
}

void setup()
{
   Serial.begin(115200);
   // while (!Serial);
   Serial.println("LVGL Benchmark Demo");

   // Init Display
   //gfx->begin();
   gfx->begin(80000000); /* specify data bus speed */
   gfx->fillScreen(BLACK);

#ifdef TFT_BL
   pinMode(TFT_BL, OUTPUT);
   digitalWrite(TFT_BL, HIGH);
#endif
   ledcSetup(0, 2000, 8);
   ledcAttachPin(TFT_BL, 0);
   ledcWrite(0, 255); /* Screen brightness can be modified by adjusting this parameter. (0-255) */
   
   lv_init();
   screenWidth = gfx->width();
   screenHeight = gfx->height();
#ifdef ESP32
   disp_draw_buf = (lv_color_t *)heap_caps_malloc(sizeof(lv_color_t) * screenWidth *screenHeight/2, MALLOC_CAP_INTERNAL | MALLOC_CAP_8BIT);
#else
   disp_draw_buf = (lv_color_t *)malloc(sizeof(lv_color_t) * screenWidth * screenHeight/2);
#endif
   if (!disp_draw_buf)
   {
      Serial.println("LVGL disp_draw_buf allocate failed!");
   }
   else
   {
      lv_disp_draw_buf_init(&draw_buf, disp_draw_buf, NULL, screenWidth * screenHeight/2);
      /* Initialize the display */
      lv_disp_drv_init(&disp_drv);
      /* Change the following line to your display resolution */
      disp_drv.hor_res = screenWidth;
      disp_drv.ver_res = screenHeight;
      disp_drv.flush_cb = my_disp_flush;
      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;
      lv_indev_drv_register(&indev_drv);

      lv_demo_benchmark();

      Serial.println("Setup done");
   }
   last_ms = millis();
}

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