#include <Adafruit_GFX.h>
#include <Adafruit_ST7789.h>
#include <SPI.h>

#define TFT_CS   5
#define TFT_RST  4
#define TFT_DC   2
#define TFT_SCLK 12
#define TFT_MOSI 11

Adafruit_ST7789 tft = Adafruit_ST7789(TFT_CS, TFT_DC, TFT_RST);

void setup() {
  Serial.begin(115200);
  tft.init(240, 280);      // Init ST7789 280x240
  tft.setRotation(2);
  tft.fillScreen(ST77XX_BLACK);

  tft.setTextColor(ST77XX_YELLOW);
  tft.setTextSize(2);
  tft.setCursor(20, 20);
  tft.println("ESP32-S3 Benchmark Demo");
}

void loop() {
  // --- Fast rainbow gradient sweep ---
  for (int c = 0; c < 256; c += 8) {
    tft.fillScreen(tft.color565(c, 255 - c, c / 2));
    delay(5);
  }

  // --- Color fills benchmark ---
  tft.fillScreen(ST77XX_RED);
  delay(20);
  tft.fillScreen(ST77XX_GREEN);
  delay(20);
  tft.fillScreen(ST77XX_BLUE);
  delay(20);
  tft.fillScreen(ST77XX_BLACK);

  // --- Circles ---
  for (int r = 10; r < 120; r += 10) {
    tft.drawCircle(tft.width()/2, tft.height()/2, r, ST77XX_CYAN);
  }

  // --- Filled rectangles ---
  for (int i = 0; i < 6; i++) {
    tft.fillRect(20 + i*30, 80, 30, 30, tft.color565(40*i, 200-20*i, 100+15*i));
  }

  // --- Triangles ---
  for (int i = 0; i < 6; i++) {
    tft.drawTriangle(20+i*30, 200, 60+i*30, 240, 100+i*30, 200, ST77XX_MAGENTA);
  }

  // --- Text test ---
  tft.setTextColor(ST77XX_WHITE);
  tft.setTextSize(2);
  tft.setCursor(30, 260);
  tft.println("Graphics Cycle Done!");

  // --- Blink invert to show hardware effect ---
  for (int i = 0; i < 4; i++) {
    tft.invertDisplay(true);
    delay(100);
    tft.invertDisplay(false);
    delay(100);
  }
}