private void WriteFrame(Stream outputStream)
{
GifFrame thisFrame = _frames[_encodingFrame];
Image thisImage = thisFrame.TheImage;
ColourTable act = SetActiveColourTable();
int transparentColourIndex;
if (_transparent == Color.Empty)
{
transparentColourIndex = 0;
}
else
{
// TESTME: WriteFrame - _transparent != Color.Empty
transparentColourIndex = FindClosest(_transparent, act);
}
WriteGraphicCtrlExt(thisFrame,
transparentColourIndex,
outputStream);
ColourTable lct;
if (_strategy == ColourTableStrategy.UseLocal)
{
lct = act;
}
else
{
lct = null;
}
WriteImageDescriptor(thisImage.Size,
thisFrame.Position,
lct,
outputStream);
// Write a local colour table if the strategy is to do so
if (_strategy == ColourTableStrategy.UseLocal)
{
act.WriteToStream(outputStream);
IndexedPixels ip;
if (_quantizerType == QuantizerType.UseSuppliedPalette)
{
ip = MakeIndexedPixels(act, thisImage);
}
else
{
ip = _pixelAnalysis.IndexedPixels;
}
WritePixels(ip, outputStream);
}
else // global colour table
{
IndexedPixels ip;
if (_quantizerType == QuantizerType.UseSuppliedPalette)
{
ip = MakeIndexedPixels(act, thisImage);
}
else
{
ip = _pixelAnalysis.IndexedPixelsCollection[_encodingFrame];
}
WritePixels(ip, outputStream);
}
}
public ActionResult Timer(long? timestamp)
{
string title = null;
try
{
byte[] output = null;
using (MemoryStream stream = new MemoryStream())
{
int repeatCount = 0; //repeat forever
DateTime end = Epoch.AddSeconds(timestamp ?? 0);
title = end.ToString();
TimeSpan remaining = end - DateTime.UtcNow;
if (remaining.TotalSeconds < 0)
{
remaining = TimeSpan.FromSeconds(0);
}
if (remaining.TotalSeconds <= 60)
{
repeatCount = -1; //don't repeat
}
using (Image background = Image.FromFile(Server.MapPath(BackgroundPath)))
{
using (Font font = new Font(FontName, FontSize, FontBold ? FontStyle.Bold : FontStyle.Regular, GraphicsUnit.Pixel))
{
using (var disposer = new Disposer())
{
var target = new SynchronizeInvokeStub();
AnimatedGifEncoder encoder = new AnimatedGifEncoder(target);
encoder.RepeatCount = repeatCount;
encoder.OutputStream = stream;
encoder.QuantizerType = GifComponents.Quantizing.QuantizerType.Octree;
{
int count = 0;
while (remaining.TotalSeconds >= 0 && count < 60)
{
Bitmap bitmap = disposer.Track(new Bitmap(background));
using (Graphics g = Graphics.FromImage(bitmap))
{
StringFormat format = new StringFormat();
format.Alignment = StringAlignment.Center;
format.LineAlignment = StringAlignment.Center;
g.TextRenderingHint = System.Drawing.Text.TextRenderingHint.AntiAliasGridFit;
string days, hours, minutes, seconds;
if (remaining.Days > 99)
{
days = "--";
hours = "--";
minutes = "--";
seconds = "--";
count = 99; //causes the loop to end after this one
}
else
{
days = remaining.Days.ToString("00");
hours = remaining.Hours.ToString("00");
minutes = remaining.Minutes.ToString("00");
seconds = remaining.Seconds.ToString("00");
}
g.DrawString(days, font, Brushes.White, new RectangleF(ImageX, ImageY, ImageWidth / 4, ImageHeight), format);
g.DrawString(hours, font, Brushes.White, new RectangleF(ImageX + (ImageWidth / 4), ImageY, ImageWidth / 4, ImageHeight), format);
g.DrawString(minutes, font, Brushes.White, new RectangleF(ImageX + (2 * ImageWidth / 4), ImageY, ImageWidth / 4, ImageHeight), format);
g.DrawString(seconds, font, Brushes.White, new RectangleF(ImageX + (3 * ImageWidth / 4), ImageY, ImageWidth / 4, ImageHeight), format);
g.DrawString(":", font, Brushes.White, new RectangleF(ImageX + (ImageWidth / 4) - ImageWidth / 8, ImageY, ImageWidth / 4, ImageHeight), format);
g.DrawString(":", font, Brushes.White, new RectangleF(ImageX + (2 * ImageWidth / 4) - ImageWidth / 8, ImageY, ImageWidth / 4, ImageHeight), format);
g.DrawString(":", font, Brushes.White, new RectangleF(ImageX + (3 * ImageWidth / 4) - ImageWidth / 8, ImageY, ImageWidth / 4, ImageHeight), format);
}
var frame = new GifFrame(bitmap);
frame.Delay = 100;
encoder.AddFrame(frame);
count++;
remaining = remaining.Subtract(OneSecond);
}
}
encoder.Start();
encoder.WaitUntilDone();
}
}
}
output = stream.ToArray();
}
return new FileContentResult(output, "image/gif");
}
catch
{
return new FilePathResult(Server.MapPath(BackgroundPath), "image/gif");
}
finally
{
Clicky.TrackRequest(Request, ActionType.PageView, "Timer: " + title);
}
}
/// <summary>
/// Adds a frame to the animation.
/// </summary>
/// <param name="frame">
/// The frame to add to the animation.
/// </param>
public void AddFrame(GifFrame frame)
{
_frames.Add(frame);
}