#include <SPI.h>
#include <Wire.h>
#include <Adafruit_GFX.h>
#include <Adafruit_SSD1306.h>
#define SCREEN_WIDTH 128 // OLED display width, in pixels
#define SCREEN_HEIGHT 64 // OLED display height, in pixels
#define OLED_RESET     -1 
#define SCREEN_ADDRESS 0x3C ///< See datasheet for Address; 0x3D for 128x64, 0x3C for 128x32
Adafruit_SSD1306 display(SCREEN_WIDTH, SCREEN_HEIGHT, &Wire, OLED_RESET);

#define LOGO_HEIGHT0   24
#define LOGO_WIDTH0    24
static const unsigned char PROGMEM heartoutline0[] =
{ 0x00, 0x00, 0x00, 0x03, 0x00, 0xC0, 0x1F, 0xC3, 0xF8, 0x30, 0x66, 0x0C, 0x60, 0x3C, 0x06, 0x40,
0x18, 0x02, 0xC0, 0x00, 0x03, 0xC0, 0x00, 0x03, 0x80, 0x00, 0x01, 0xC0, 0x00, 0x03, 0xC0, 0x00,
0x03, 0x40, 0x00, 0x02, 0x60, 0x00, 0x06, 0x30, 0x00, 0x0C, 0x18, 0x00, 0x18, 0x0C, 0x00, 0x30,
0x06, 0x00, 0x60, 0x03, 0x00, 0xC0, 0x01, 0x81, 0x80, 0x00, 0xC3, 0x00, 0x00, 0x66, 0x00, 0x00,
0x3C, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, };
#define LOGO_HEIGHT1   26
#define LOGO_WIDTH1    26
static const unsigned char PROGMEM heartoutline1 [] = {
  0x00, 0x00, 0x00, 0x00, 0x01, 0x00, 0x20, 0x00, 0x0f, 0xe1, 0xfc, 0x00, 0x38, 0x33, 0x87, 0x00, 
  0x30, 0x1e, 0x01, 0x80, 0x60, 0x0c, 0x01, 0x80, 0x40, 0x00, 0x00, 0x80, 0xc0, 0x00, 0x00, 0xc0, 
  0xc0, 0x00, 0x00, 0xc0, 0xc0, 0x00, 0x00, 0xc0, 0xc0, 0x00, 0x00, 0xc0, 0xc0, 0x00, 0x00, 0xc0, 
  0x40, 0x00, 0x00, 0x80, 0x60, 0x00, 0x01, 0x80, 0x30, 0x00, 0x03, 0x00, 0x18, 0x00, 0x06, 0x00, 
  0x0c, 0x00, 0x0c, 0x00, 0x06, 0x00, 0x18, 0x00, 0x03, 0x00, 0x30, 0x00, 0x01, 0x80, 0x60, 0x00, 
  0x00, 0xc0, 0xc0, 0x00, 0x00, 0x61, 0x80, 0x00, 0x00, 0x33, 0x00, 0x00, 0x00, 0x1e, 0x00, 0x00, 
  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00
};

void setup() {
  Serial.begin(9600);
  // SSD1306_SWITCHCAPVCC = generate display voltage from 3.3V internally
  if(!display.begin(SSD1306_SWITCHCAPVCC, SCREEN_ADDRESS)) {
    Serial.println(F("SSD1306 allocation failed"));
    for(;;); // Don't proceed, loop forever
  }

  display.clearDisplay();


  //testscrolltext();    // Draw scrolling text

  //letteranimation();

  testdrawbitmap();    // Draw a small bitmap image

  //letter();
}
void loop() {
}

void letteranimation(void){
  int16_t i;
  for(i=0; i<=display.height()/2+5-i/2; i+=2) {
    display.clearDisplay();
    display.drawRect(5,5+i/2,display.width()-9,display.height()-10, 1);
    display.fillTriangle(5,5+i/2,display.width()-5,5+i/2,display.width()/2,display.height()/2+10-i, 1);
    display.drawTriangle(5,5+i/2,display.width()-5,5+i/2,display.width()/2,display.height()/2+i/2, 1);
    display.display();
    delay(1);
    }

  for(i=display.height()/2+5-i/2; i<=display.height(); i+=2) {   
    display.clearDisplay();
    display.drawRect(5,5+i/2,display.width()-9,display.height()-10, 1);
    display.drawTriangle(5,5+i/2,display.width()-5,5+i/2,display.width()/2,display.height()/2+10-i, 1);
    display.drawTriangle(5,5+i/2,display.width()-5,5+i/2,display.width()/2,display.height()/2+i/2, 1);
    display.display();
    delay(1);
    }
}
void testscrolltext(void) {
  display.clearDisplay();

  display.setTextSize(2); // Draw 2X-scale text
  display.setTextColor(SSD1306_WHITE);
  display.setCursor(10, 0);
  display.println(F("hi"));
  display.display();      // Show initial text
  delay(100);

}

void testdrawbitmap(void) {
  int16_t i;

  display.clearDisplay(); // Clear display buffer

  //for(i=0; i<4; i+=1) {
  //  display.drawLine(0, 0, i, display.height()-1, SSD1306_WHITE);
  //  display.display(); // Update screen with each newly-drawn line
  //  delay(1);
  //}

  display.clearDisplay();
  display.drawBitmap(
    (display.width()  - LOGO_WIDTH0 ) / 2,
    (display.height() - LOGO_HEIGHT0) / 2,
    heartoutline0, LOGO_WIDTH0, LOGO_HEIGHT0, 1);
  display.display();
  delay(1000);
  
  display.clearDisplay();
  display.drawBitmap(
    (display.width()  - LOGO_WIDTH1 ) / 2,
    (display.height() - LOGO_HEIGHT1) / 2,
    heartoutline1, LOGO_WIDTH1, LOGO_HEIGHT1, 1);
  display.display();
  delay(500);
  
  testdrawbitmap();
}

void letter(void){
  display.clearDisplay();
  display.setTextSize(1.5); 
  display.setTextColor(SSD1306_WHITE);
  display.setCursor(5,5);
  display.println(F("Dear \n Phuong Thao \n My beloved one"));
  display.display();
  
  
}