SharedMemoryThread

using System;
using System.IO;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Threading;
using System.Drawing;
using System.Globalization;
using System.Runtime.InteropServices.WindowsRuntime;
using System.Diagnostics;

namespace SpidermanGelap
{
    class Program
    {
        static Thread[] threads;
        static Barrier _barrier = new Barrier(participantCount: 0);
        
        //Extra feature, geng just change path here and put original picture there too
        static String path = @"D:\Google Drive\UiTM Jasin (CS230)\Sem 5\CSC580 (Parallel Processing)\Lab 5 Spiderman"; 
        static void Main(string[] args)
        {   
            //Start Stopwatch
            Stopwatch stopwatch = new Stopwatch();
            stopwatch.Start();


            //Process of Splitting Image
            Console.WriteLine("Process Splitting Starting...");
            Image image1;
            image1 = new Bitmap(Image.FromFile(Path.Combine(path,"Spiderman.jpg")));

            int rows = 7;//Tukar nombor of process dekat sini. 

            int columns = 1;//No of columns as per Desire
            var imgarray = new Image[rows, columns];//Create Image Array of Size Rows X Colums
            var img = image1;//Get Image from anywhere, From File Or Using Dialogbox used previously
            int height = img.Height;
            int width = img.Width;//Get image Height & Width of Input Image
            int one_img_h = height / rows;
            int one_img_w = width / columns;//You need Rows x Columns, So get 1/rows Height, 1/columns width of original Image
            for (int i = 0; i < rows; i++)
            {
                for (int j = 0; j < columns; j++)
                {
                    imgarray[i, j] = new Bitmap(one_img_w, one_img_h);//generating new bitmap
                    var graphics = Graphics.FromImage(imgarray[i, j]);
                    graphics.DrawImage(img, new Rectangle(0, 0, one_img_w, one_img_h), new Rectangle(j * one_img_w, i * one_img_h, one_img_w, one_img_h), GraphicsUnit.Pixel);//Generating Splitted Pieces of Image
                    graphics.Dispose();
                    ((Bitmap)imgarray[i, j]).Save(Path.Combine(path, "Spidey" + i + ".jpg"), System.Drawing.Imaging.ImageFormat.Jpeg);

                    Console.WriteLine("Splitting image "+i);
                }
            }

            Console.WriteLine("Process Splitting Ended...");
            //Splitting habis

            //Creating threads to process color changing on splitted images
            int noOfThreads = rows;
            threads = new Thread[noOfThreads];
            //make array of Task
            Task[] tasks = new Task[noOfThreads];
            for (int i = 0; i < noOfThreads; i++)
            {
                int j = i;
                Console.WriteLine("Create thread no "+i);
                _barrier.AddParticipant();  //add count to participant for barrier
                tasks[j] = Task.Factory.StartNew(() => Run(j)); //create thread
                
            }
            Task.WaitAll(tasks); //It will wait all of thread to finish first then baru sambung dekat bawah
            
            
            Console.WriteLine("Process Combining Starting...");
            //Process of Combining Image
            //Images that gone through color changes will be combine back 

            Bitmap temp = new Bitmap(5000, 5000);

            Graphics graph1 = Graphics.FromImage((Image)temp);

            int n = 0;
            for (int i = 0; i < rows; i++)
            {
                graph1.DrawImage((Image)Image.FromFile(Path.Combine(path, "BlackSpidey" + i + ".jpg")), 0, n);
                n += (5000/rows);
            }
            graph1.Dispose();

            temp.Save(Path.Combine(path, "combine1.jpg"), System.Drawing.Imaging.ImageFormat.Jpeg);
            Console.WriteLine("Process Combining Ended...Yayyy :)");

            //Stopwatch End
            stopwatch.Stop();
            Console.WriteLine("Time elapsed: {0}", stopwatch.Elapsed);

            Console.ReadKey();
        }

        static void Run(object id)
        {

            {   //Process of changing color
                Bitmap spodey = new Bitmap(Image.FromFile(Path.Combine(path, "Spidey" + id + ".jpg")));

                for (int rowpix = 0; rowpix < spodey.Width; rowpix++)
                {
                    for (int colpix = 0; colpix < spodey.Height; colpix++)
                    {

                        if ((spodey.GetPixel(rowpix, colpix).R - spodey.GetPixel(rowpix, colpix).G) > 40)

                        {
                            spodey.SetPixel(rowpix, colpix, Color.Black);

                        }
                    }
                }

                spodey.Save(Path.Combine(path, "BlackSpidey" + id + ".jpg"), System.Drawing.Imaging.ImageFormat.Jpeg);

                Console.WriteLine("Done changing color of Image " + id);
                _barrier.SignalAndWait();
            }
        }
    }
}