gistfile1.txt

import java.awt.Robot; //java library that lets us take screenshots
import java.awt.AWTException;
import java.awt.event.InputEvent;
import java.awt.image.BufferedImage;
import java.awt.Rectangle;
import java.awt.Dimension;
import processing.serial.*; //library for serial communication


Serial port; //creates object "port" of serial class
Robot robby; //creates object "robby" of robot class

void setup()
{
  port = new Serial(this, Serial.list()[0], 115200); //set baud rate
  size(100, 100); //window size (doesn't matter)
  try //standard Robot class error check
  {
    robby = new Robot();
  }
  catch (AWTException e)
  {
    println("Robot class not supported by your system!");
    exit();
  }
}

void draw()
{
  int pixel; //ARGB variable with 32 int bytes where
  //sets of 8 bytes are: Alpha, Red, Green, Blue
  float r=0;
  float g=0;
  float b=0;

  //get screenshot into object "screenshot" of class BufferedImage
  BufferedImage screenshot = robby.createScreenCapture(new Rectangle(new Dimension(1368, 928)));
  //1368*928 is the screen resolution


  int i=0;
  int j=0;
  //1368*928
  //I skip every alternate pixel making my program 4 times faster
  for (i =0;i<1368; i=i+2) {
    for (j=0; j<928;j=j+2) {
      pixel = screenshot.getRGB(i, j); //the ARGB integer has the colors of pixel (i,j)
      r = r+(int)(255&(pixel>>16)); //add up reds
      g = g+(int)(255&(pixel>>8)); //add up greens
      b = b+(int)(255&(pixel)); //add up blues
    }
  }
  r=r/(684*464); //average red (remember that I skipped ever alternate pixel)
  g=g/(684*464); //average green
  b=b/(684*464); //average blue


//  port.write(0xff); //write marker (0xff) for synchronization
//  delay(500); //delay for safety

//  port.write((int)(r)); //write red value
//  delay(100); //delay for safety
//  port.write((int)(g)); //write green value
//  delay(100); //delay for safety
//  port.write((int)(b)); //write blue value
//  delay(1000); //delay for safety
//println(unhex(hex(color(round(r), round(g), round(b)), 6)));
//port.write("1|15617104|");
for (i = 0; i<32; i++) {
  port.write(i + "|" + unhex(hex(color(round(r), round(g), round(b)), 6)) + "|");
  println(i + "|" + unhex(hex(color(round(r), round(g), round(b)), 6)) + "|");
  delay(20);
}
delay(100);
  background(r, g, b); //make window background average color
}