MPI

using System;
using System.Collections.Generic;
using System.Linq;
using System.ComponentModel;
using System.Text;
using System.IO;
using System.Drawing;
using System.Diagnostics;
using System.Threading.Tasks;
using MPI;

namespace ColorChanges
{
    class Program
    {

        static void Main(string[] args)
        {    
            
            using (new MPI.Environment(ref args))
            {   // Create new stopwatch.
                Stopwatch stopwatch = new Stopwatch();
                // Begin timing.
                stopwatch.Start();
                String path = @"D:\Google Drive\UiTM Jasin (CS230)\Sem 5\CSC580 (Parallel Processing)\lab7"; //Just change path here. 
                //Dont forget to put original Spiderman.jpg in the same file
               
                

                Intracommunicator comm = Communicator.world;//Starting MPI

                
                if (comm.Rank == 0)
                {   
                    //Process of Splitting Image
                    Console.WriteLine("Split Proccess Started");
                    Image image1;
                    image1 = new Bitmap(Image.FromFile(Path.Combine(path, "Spiderman.jpg")));

                    int rows = comm.Size;//No of Rows as per Desire
                    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++)
                        {
                            Console.WriteLine("Splitting image " + i);
                            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();
                            Console.WriteLine("Image " + i + " Splitted");
                        }
                    }
                    comm.Broadcast(ref imgarray, 0);
                    Console.WriteLine("Split Proccess Ended");
                   
                    //Changing Color
                    Console.WriteLine("Image " + comm.Rank + " Changing Color");
                    Bitmap spodey = (Bitmap)imgarray[0, 0];

                    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, "Spidey1.jpg"), System.Drawing.Imaging.ImageFormat.Jpeg);
                    Console.WriteLine("Spidey colored " + comm.Rank + " done");
                    
                    comm.Barrier();

                }
                else
                {  
                    
                    Image[,] imgarray = new Image[10, 10];
                    comm.Broadcast(ref imgarray, 0);
                    Console.WriteLine("Image " + comm.Rank + " Changing Color");
                    Bitmap spodey = (Bitmap)imgarray[comm.Rank, 0];

                    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, "Spidey"+(comm.Rank+1)+".jpg"), System.Drawing.Imaging.ImageFormat.Jpeg);
                    Console.WriteLine("Spider colored " + comm.Rank + " done");
                   
                    comm.Barrier();

                }

              

                if (comm.Rank == 0)
                {
                    
                    Console.WriteLine("All color changed");
                    Console.WriteLine("Process combining start...");
                    //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 = 1; i <= comm.Size; i++)
                    {
                        graph1.DrawImage((Image)Image.FromFile(Path.Combine(path,"Spidey" + i + ".jpg")), 0, n);
                        n += (5000 / comm.Size);
                    }
                    graph1.Dispose();

                    temp.Save((Path.Combine(path, "Changed.jpg")), System.Drawing.Imaging.ImageFormat.Jpeg);
                    Console.WriteLine("Process combining ended...");
                    // Stop timing.
                    stopwatch.Stop();

                    // Write result.
                    Console.WriteLine("Time elapsed: {0}", stopwatch.Elapsed + " from rank " + comm.Rank);

                }
                
            }
           
              

            
        }
    }
}