Creating your own animation format

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
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;
using System.Windows.Threading;
using System.Globalization;
using System.IO;
using Pfz.Imaging;
using Pfz.Imaging.Wpf;
using System.Diagnostics;

namespace PfzImagingSample
{
    /// <summary>
    /// Interaction logic for Window1.xaml
    /// </summary>
    public partial class Window1 : Window
    {
        public Window1()
        {
            InitializeComponent();

            _animation = _Animation();
            _eternalAnimation = _EternalAnimation();

            var timer = new DispatcherTimer();
            timer.Interval = TimeSpan.FromMilliseconds(1000.0/30.0);
            timer.Tick += new EventHandler(timer_Tick);
            timer.IsEnabled = true;
        }

        private readonly IEnumerable<BitmapSource> _animation;
        private readonly IEnumerator<BitmapSource> _eternalAnimation;
        private void timer_Tick(object sender, EventArgs e)
        {
            _eternalAnimation.MoveNext();
            imageShowAnimation.Source = _eternalAnimation.Current;
        }

        private IEnumerator<BitmapSource> _EternalAnimation()
        {
            while(true)
                foreach(var frame in _animation)
                    yield return frame;
        }
        private IEnumerable<BitmapSource> _Animation()
        {
            BitmapSource background;
            using (var stream = File.OpenRead("Background.png"))
            {
                var pngDecoder = new PngBitmapDecoder(stream, BitmapCreateOptions.None, BitmapCacheOption.OnLoad);
                background = pngDecoder.Frames[0];
            }

            var rectangle = new Rect(0, 0, 300, 225);
            var formattedText = new FormattedText("Sample Animation", CultureInfo.InvariantCulture, FlowDirection.LeftToRight, new Typeface(FontFamily, FontStyles.Normal, FontWeights.Normal, FontStretches.Normal), 14, Brushes.Yellow);
            var target = new RenderTargetBitmap(300, 225, 96, 96, PixelFormats.Pbgra32);
            // The format should be Rgb24 but the RenderTargetBitmap does not support it.

            for (int frameIndex = 0; frameIndex < 90; frameIndex++)
            {
                int y = 255*frameIndex/90 - 10;
                var drawingVisual = new DrawingVisual();
                var context = drawingVisual.RenderOpen();

                if (checkboxUseBackgroundImage.IsChecked.GetValueOrDefault())
                    context.DrawImage(background, rectangle);
                else
                    context.DrawRectangle(Brushes.Black, null, rectangle);

                context.DrawText(formattedText, new Point(0, y));
                context.Close();

                target.Render(drawingVisual);

                yield return target;
            }
        }

        private void _SaveAnimation(IFrameWriter<Rgb24> frameWriter)
        {
            int factor = comboboxQuality.SelectedIndex + 1;

            if (factor > 1)
                frameWriter = new SimplifyBitmapWriter<Rgb24>(frameWriter, factor);

            bool requiresDifferentBitmap = frameWriter.RequiresDifferentBitmap;
            ManagedBitmap<Rgb24> bitmap = null;
            foreach (var frame in _animation)
            {
                var converted = new FormatConvertedBitmap(frame, PixelFormats.Rgb24, null, 1);

                if (bitmap == null || requiresDifferentBitmap)
                    bitmap = new ManagedBitmap<Rgb24>(converted.PixelWidth, converted.PixelHeight);

                converted.CopyPixels(bitmap);
                frameWriter.WriteFrame(bitmap);
            }

            Process.Start(".");
        }

        private void buttonSaveDeflateAnimation_Click(object sender, RoutedEventArgs e)
        {
            string fileName = string.Format("Animation_{0:yyyy_MM_dd-HH_mm_ss}.pdz", DateTime.Now);
            using (var stream = File.Create(fileName))
                using (var frameWriter = new DeflateFrameWriter<Rgb24>(stream))
                    _SaveAnimation(frameWriter);
        }

        private void buttonSavePngAnimation_Click(object sender, RoutedEventArgs e)
        {
            string directoryName = string.Format("Animation_{0:yyyy_MM_dd-HH_mm_ss}", DateTime.Now);
                using (var frameWriter = new MultiplePngRgb24FrameWriter(directoryName))
                    _SaveAnimation(frameWriter);

        }
    }
}