Reddit_Request_76_image_stiching_tool

using System;
using System.Collections.Generic;
using System.IO;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Data;
using System.Windows.Documents;
using System.Windows.Input;
using System.Windows.Media;
using System.Windows.Media.Imaging;
using System.Windows.Navigation;
using System.Windows.Shapes;

namespace Reddit_Request_76_image_stiching_tool
{
    /// <summary>
    /// Interaction logic for MainWindow.xaml
    /// </summary>
    public partial class MainWindow : Window
    {
        public MainWindow()
        {
            InitializeComponent();
        }

        private void Window_Drop(object sender, DragEventArgs e)
        {
            if (e.Data.GetDataPresent(DataFormats.FileDrop))
            {
                string[] files = (string[])e.Data.GetData(DataFormats.FileDrop);
                var tmp = files.ToList();
                tmp.Sort();
                files = tmp.ToArray();

                var imgSize = GetSize(files);
                MakeImage(files, imgSize);
            }
        }

        private Tuple<int,int> GetSize(string[] files)
        {
            int width = 0;
            int height = 0;
            foreach (var filePath in files)
            {
                FileInfo file = new FileInfo(filePath);
                if (file.Extension.ToLower() == ".jpg" || file.Extension.ToLower() == ".jpeg" || file.Extension.ToLower() == ".png" || file.Extension.ToLower() == ".gif" || file.Extension.ToLower() == ".bmp")
                {
                    try
                    {
                        var frame = BitmapFactory.FromStream(file.OpenRead());
                        height += frame.PixelHeight;
                        if (frame.PixelWidth > width)
                            width = frame.PixelWidth;
                    }
                    catch (Exception ex)
                    {
                        MessageBox.Show(ex.Message, file.Name);
                    }
                }
            }
            return new Tuple<int, int>(width, height);
        }
        private async void MakeImage(string[] files, Tuple<int, int> size)
        {
            int y = 0;
            WriteableBitmap writeableBmp = BitmapFactory.New(size.Item1, size.Item2);
            using (writeableBmp.GetBitmapContext())
            {
                foreach (var filePath in files)
                {
                    FileInfo file = new FileInfo(filePath);
                    if (file.Extension.ToLower() == ".jpg" || file.Extension.ToLower() == ".jpeg" || file.Extension.ToLower() == ".png" || file.Extension.ToLower() == ".gif" || file.Extension.ToLower() == ".bmp")
                    {
                        try
                        {
                            var frame = BitmapFactory.FromStream(file.OpenRead());
                            Rect dest = new Rect((size.Item1*.5)-(frame.PixelWidth*.5), y, frame.PixelWidth, frame.PixelHeight);
                            writeableBmp.Blit(dest, frame, new Rect(0, 0, frame.PixelWidth, frame.PixelHeight), WriteableBitmapExtensions.BlendMode.None);

                            y += frame.PixelHeight;
                            frame = null;
                            this.Title = file.Name;
                            await Task.Delay(10);
                            GC.Collect();
                        }
                        catch (Exception ex)
                        {
                            MessageBox.Show(ex.Message, file.Name);
                        }
                    }
                }
            }

            this.Title = "Saving pngOut.png";
            await Task.Delay(10);
            using (var fs = File.Create("pngOut.png"))
            {
                var encoder = new PngBitmapEncoder();
                encoder.Frames.Add(BitmapFrame.Create(writeableBmp));
                encoder.Save(fs);
            }
            this.Title = "Done!";
        }
    }
}