private WriteableBitmap DecodeGif(MemoryStream stream)
{
stream.Seek(0, SeekOrigin.Begin);
var gd = new GifDecoder();
int status = gd.Read(stream);
if (status == GifDecoder.STATUS_OK)
{
return gd.GetImage();
}
return null;
}
public static byte[] GetThumbnailGIF89a(Stream stream, Size min, Size thumb)
{
long offset = stream.Position;
GifDecoder decoder = new GifDecoder();
decoder.Read(stream);
Size sz = decoder.GetFrameSize();
stream.Seek(offset, SeekOrigin.Begin);
if (min != null && sz.Width < min.Width && sz.Height < min.Height)
{
throw new InvalidImageSizeException(
string.Empty, sz, min);
}
return(GetResizedImageBytesGIF89a(decoder, stream, thumb, s_ImageQuality));
}
public void TransparencyTest()
{
ReportStart();
Color noColour = Color.FromArgb(0, 0, 0, 0); // note alpha of 0
Color blue = Color.FromArgb(0, 0, 255);
Color transparent = Color.FromArgb(100, 100, 100);
_encoder = new AnimatedGifEncoder();
_encoder.Transparent = transparent;
// transparent | transparent
// -------------------------
// blue | blue
Bitmap bitmap = new Bitmap(2, 2);
bitmap.SetPixel(0, 0, transparent);
bitmap.SetPixel(1, 0, transparent);
bitmap.SetPixel(0, 1, blue);
bitmap.SetPixel(1, 1, blue);
_frame = new GifFrame(bitmap);
_encoder.AddFrame(_frame);
// encode and decode
string filename = "GifFrameTest.TransparencyTest.gif";
_encoder.WriteToFile(filename);
_decoder = new GifDecoder(filename);
_decoder.Decode();
Assert.AreEqual(ErrorState.Ok, _decoder.ConsolidatedState);
// Result should be:
// black | black
// -------------
// blue | blue
Bitmap actual = (Bitmap)_decoder.Frames[0].TheImage;
Assert.AreEqual(noColour, actual.GetPixel(0, 0));
Assert.AreEqual(noColour, actual.GetPixel(1, 0));
Assert.AreEqual(blue, actual.GetPixel(0, 1));
Assert.AreEqual(blue, actual.GetPixel(1, 1));
ReportEnd();
}
public static ImageResult FromStream(Stream stream, ColorComponents?requiredComponents = null,
bool use8BitsPerChannel = true)
{
ImageResult result = null;
if (JpgDecoder.Test(stream))
{
result = JpgDecoder.Decode(stream, requiredComponents);
}
else if (PngDecoder.Test(stream))
{
result = PngDecoder.Decode(stream, requiredComponents);
}
else if (BmpDecoder.Test(stream))
{
result = BmpDecoder.Decode(stream, requiredComponents);
}
else if (GifDecoder.Test(stream))
{
result = GifDecoder.Decode(stream, requiredComponents);
}
else if (PsdDecoder.Test(stream))
{
result = PsdDecoder.Decode(stream, requiredComponents);
}
else if (TgaDecoder.Test(stream))
{
result = TgaDecoder.Decode(stream, requiredComponents);
}
if (result == null)
{
Decoder.stbi__err("unknown image type");
}
if (use8BitsPerChannel && result.BitsPerChannel != 8)
{
result.Data = Conversion.stbi__convert_16_to_8(result.Data, result.Width, result.Height,
(int)result.ColorComponents);
}
return(result);
}
public MainWindow()
{
InitializeComponent();
Task.Run(async() =>
{
var gifImage =
await Dispatcher.InvokeAsync(() => GifDecoder.Decode("1.gif"));
foreach (var temp in gifImage.Frames)
{
Dispatcher.Invoke(() =>
{
//Image.Source = BitmapToImageSource(temp.Image);
Image.Source = temp.Image;
});
await Task.Delay(TimeSpan.FromMilliseconds(temp.Delay * 10));
}
});
}
/// <summary>
/// 把Gif文件转成Png文件，放在directory目录下
/// </summary>
/// <param name="file"></param>
/// <param name="directory"></param>
/// <returns></returns>
public static void GifToPngs(string giffile, string directory)
{
GifDecoder gifDecoder = new GifDecoder();
directory += "\\";
if (!Directory.Exists(directory))
{
Directory.CreateDirectory(directory);
}
//读取
gifDecoder.Read(giffile);
for (int i = 0, count = gifDecoder.GetFrameCount(); i < count; i++)
{
Image frame = gifDecoder.GetFrame(i); // frame i
frame.Save(directory + "\\" + i.ToString("d2") + ".png", ImageFormat.Png);
//转成jpg
//frame.Save(directory + "\\" + i.ToString("d2") + ".jpg", ImageFormat.Jpeg);
}
}
public unsafe void Decode_NonTerminatedFinalFrame()
{
var testFile = TestFile.Create(TestImages.Gif.Rings);
int length = testFile.Bytes.Length - 2;
fixed(byte *data = testFile.Bytes.AsSpan(0, length))
{
using (var stream = new UnmanagedMemoryStream(data, length))
{
var decoder = new GifDecoder();
using (Image <Rgba32> image = decoder.Decode <Rgba32>(Configuration.Default, stream))
{
Assert.Equal((200, 200), (image.Width, image.Height));
}
}
}
}
async Task <FFGifDrawable> PlatformGenerateGifImageAsync(string path, ImageSource source, Stream imageData, ImageInformation imageInformation, bool enableTransformations, bool isPlaceholder)
{
if (imageData == null)
{
throw new ArgumentNullException(nameof(imageData));
}
ThrowIfCancellationRequested();
try
{
int downsampleWidth = 0;
int downsampleHeight = 0;
if (Parameters.DownSampleSize != null && (Parameters.DownSampleSize.Item1 > 0 || Parameters.DownSampleSize.Item2 > 0))
{
downsampleWidth = Parameters.DownSampleSize.Item1;
downsampleHeight = Parameters.DownSampleSize.Item2;
}
if (Parameters.DownSampleUseDipUnits)
{
downsampleWidth = downsampleWidth.DpToPixels();
downsampleHeight = downsampleHeight.DpToPixels();
}
var gifDecoder = new GifDecoder(downsampleWidth, downsampleHeight, (bmp) =>
{
return(PlatformTransformAsync(path, source, enableTransformations, isPlaceholder, bmp));
});
await gifDecoder.ReadGifAsync(imageData);
ThrowIfCancellationRequested();
var bitmap = gifDecoder.GetBitmap();
ThrowIfCancellationRequested();
return(new FFGifDrawable(Context.Resources, bitmap, gifDecoder));
}
finally
{
imageData.TryDispose();
}
}
public void SetSource(Stream stream)
{
Stream = stream;
if (Stream == null)
{
//throw new InvalidDataException("Missing valid URI or Stream.");
return;
}
_gifDecoder = new GifDecoder(Stream);
_bgWorker = new GifBackgroundWorker(_gifDecoder);
var pixSize = new PixelSize(_gifDecoder.Header.Dimensions.Width, _gifDecoder.Header.Dimensions.Height);
_targetBitmap = new WriteableBitmap(pixSize, new Vector(96, 96), PixelFormat.Bgra8888, AlphaFormat.Opaque);
_bgWorker.CurrentFrameChanged += FrameChanged;
GifPixelSize = pixSize;
Run();
}
//反转GIF动画
private void buttonReverseGIF_Click(object sender, EventArgs e)
{
decimal decDelayTimes = numericUpDown_DelayTimes.Value;
string strFileName = this.textBox_SelectGIFPath.Text;
if (strFileName.Length <= 0)
{
MessageBox.Show("未选择要反序的文件!请选择【选择GIF文件】");
return;
}
/* extract Gif */
string outputPath = Path.GetTempPath();
List <string> strList = GetFrames(strFileName, outputPath);
GifDecoder gifDecoder = new GifDecoder();
gifDecoder.Read(strFileName);
// int count = gifDecoder.GetFrameCount();
// List<string> strList = new List<string>();
// for (int i = 0; i < count; i++)
// {
// Image frame = gifDecoder.GetFrame(i); // frame i
// strList[i] = outputPath + Guid.NewGuid().ToString() + ".png";
// frame.Save(strList[i], ImageFormat.Png);
// frame.Dispose();
// }
strList.Reverse();
String outputFilePath = strFileName + ".gif";
AnimatedGifEncoder age = new AnimatedGifEncoder();
age.Start(outputFilePath);
age.SetDelay(gifDecoder.GetDelay(0));
//-1:no repeat,0:always repeat
age.SetRepeat(0);
for (int i = 0; i < strList.Count; i++)
{
age.AddFrame(Image.FromFile(strList[i]));
}
age.Finish();
MessageBox.Show("反序完成,文件保存在" + outputFilePath + "目录!");
}
public void Encode_PreservesTextData()
{
var decoder = new GifDecoder();
var testFile = TestFile.Create(TestImages.Gif.LargeComment);
using (Image <Rgba32> input = testFile.CreateRgba32Image(decoder))
using (var memoryStream = new MemoryStream())
{
input.Save(memoryStream, new GifEncoder());
memoryStream.Position = 0;
using (Image <Rgba32> image = decoder.Decode <Rgba32>(Configuration.Default, memoryStream))
{
GifMetadata metadata = image.Metadata.GetGifMetadata();
Assert.Equal(2, metadata.Comments.Count);
Assert.Equal(new string('c', 349), metadata.Comments[0]);
Assert.Equal("ImageSharp", metadata.Comments[1]);
}
}
}
public void PositionDecodedFrameSetTest()
{
ReportStart();
_decoder = new GifDecoder(@"images\smiley\smiley.gif");
_decoder.Decode();
_frame = _decoder.Frames[0];
try
{
_frame.Position = new Point(1, 1);
}
catch (InvalidOperationException ex)
{
string message
= "This GifFrame was returned by a GifDecoder so this "
+ "property is read-only";
StringAssert.Contains(message, ex.Message);
ReportEnd();
throw;
}
}
public static ImageInfo?FromStream(Stream stream)
{
var info = JpgDecoder.Info(stream);
if (info != null)
{
return(info);
}
info = PngDecoder.Info(stream);
if (info != null)
{
return(info);
}
info = GifDecoder.Info(stream);
if (info != null)
{
return(info);
}
info = BmpDecoder.Info(stream);
if (info != null)
{
return(info);
}
info = PsdDecoder.Info(stream);
if (info != null)
{
return(info);
}
info = TgaDecoder.Info(stream);
if (info != null)
{
return(info);
}
return(null);
}
/// <summary>
/// Creates a deep copy of an image allowing you to set the pixel format.
/// Disposing of the original is the responsibility of the user.
/// <remarks>
/// Unlike the native <see cref="Image.Clone"/> method this also copies animation frames.
/// </remarks>
/// </summary>
/// <param name="source">The source image to copy.</param>
/// <param name="animationProcessMode">The process mode for frames in animated images.</param>
/// <param name="format">The <see cref="PixelFormat"/> to set the copied image to.</param>
/// <param name="preserveExifData">Whether to preserve exif metadata. Defaults to false.</param>
/// <returns>
/// The <see cref="Image"/>.
/// </returns>
public static Image Copy(this Image source, AnimationProcessMode animationProcessMode, PixelFormat format = PixelFormat.Format32bppPArgb, bool preserveExifData = false)
{
if (source.RawFormat.Equals(ImageFormat.Gif))
{
// Read from the correct first frame when performing additional processing
source.SelectActiveFrame(FrameDimension.Time, 0);
var decoder = new GifDecoder(source, animationProcessMode);
var encoder = new GifEncoder(null, null, decoder.LoopCount);
// Have to use Octree here, there's no way to inject it.
var quantizer = new OctreeQuantizer();
for (var i = 0; i < decoder.FrameCount; i++)
{
var frame = decoder.GetFrame(source, i);
frame.Image = quantizer.Quantize(((Bitmap)frame.Image).Clone(new Rectangle(0, 0, frame.Image.Width, frame.Image.Height), format));
((Bitmap)frame.Image).SetResolution(source.HorizontalResolution, source.VerticalResolution);
encoder.AddFrame(frame);
}
return(encoder.Save());
}
// Create a new image and copy it's pixels.
var copy = new Bitmap(source.Width, source.Height, format);
copy.SetResolution(source.HorizontalResolution, source.VerticalResolution);
using (var graphics = Graphics.FromImage(copy))
{
graphics.DrawImageUnscaled(source, 0, 0);
}
if (preserveExifData)
{
foreach (var item in source.PropertyItems)
{
copy.SetPropertyItem(item);
}
}
return(copy);
}
public static byte[] GetResizedImageBytesGIF89a(GifDecoder originalimage, Stream stream, Size ts, int quality)
{
Size sz = originalimage.GetFrameSize();
if (sz.Height > ts.Height || sz.Width > ts.Width)
{
MemoryStream ms = new MemoryStream();
AnimatedGifEncoder.Resize(originalimage, ms, ts.Width, ts.Height, quality);
ms.Flush();
byte[] result = new byte[ms.Length];
MemoryStream resultstream = new MemoryStream(result);
ms.WriteTo(resultstream);
return(result);
}
else
{
stream.Seek(0, SeekOrigin.Begin);
BinaryReader sr = new BinaryReader(stream);
return(sr.ReadBytes((int)stream.Length));
}
}
public static IEnumerable <Bitmap> LoadSpritesFromFile(string fileName)
{
// We have to use this stream code because using "new Bitmap(filename)"
// keeps the file open until the Bitmap is disposed
FileStream fileStream = new FileStream(fileName, FileMode.Open, FileAccess.Read);
Bitmap loadedBmp = (Bitmap)Bitmap.FromStream(fileStream);
fileStream.Close();
// Unfortunately the Bitmap.Clone method will crash later due to
// a .NET bug when it's loaded from a stream. Therefore we need
// to make a fresh copy.
loadedBmp = Utilities.CreateCopyOfBitmapPreservingColourDepth(loadedBmp);
//Bitmap loadedBmp = new Bitmap(fileName);
if ((System.IO.Path.GetExtension(fileName).ToLower() == ".gif") &&
(loadedBmp.PixelFormat != PixelFormat.Format8bppIndexed))
{
// The .NET Bitmap class has a bug, whereby it will convert
// animated gifs to 32-bit when it loads them. This causes
// us an issue, so use the custom GifDecoder instead when
// this happens.
loadedBmp.Dispose();
GifDecoder decoder = new GifDecoder();
if (decoder.Read(fileName) != GifDecoder.STATUS_OK)
{
throw new AGS.Types.InvalidDataException("Unable to load GIF");
}
for (int i = 0; i < decoder.GetFrameCount(); i++)
{
yield return(decoder.GetFrame(i));
}
}
else
{
yield return(loadedBmp);
}
}
public void SetSource(object newValue)
{
var sourceUri = newValue as Uri;
var sourceStr = newValue as Stream;
Stream stream = null;
if (sourceUri != null)
{
_streamCanDispose = true;
this.Progress = new Progress <int>();
if (sourceUri.OriginalString.Trim().StartsWith("resm"))
{
var assetLocator = AvaloniaLocator.Current.GetService <IAssetLoader>();
stream = assetLocator.Open(sourceUri);
}
}
else if (sourceStr != null)
{
stream = sourceStr;
}
else
{
throw new InvalidDataException("Missing valid URI or Stream.");
}
Stream = stream;
this._gifDecoder = new GifDecoder(Stream);
this._bgWorker = new GifBackgroundWorker(_gifDecoder);
var pixSize = new PixelSize(_gifDecoder.Header.Dimensions.Width, _gifDecoder.Header.Dimensions.Height);
this._targetBitmap = new WriteableBitmap(pixSize, new Vector(96, 96), PixelFormat.Bgra8888);
TargetControl.Source = _targetBitmap;
//TargetControl.DetachedFromVisualTree += delegate { this.Dispose(); };
_bgWorker.CurrentFrameChanged += FrameChanged;
Run();
}
/// <summary>
/// Creates a copy of an image allowing you to set the pixel format.
/// Disposing of the original is the responsibility of the user.
/// <remarks>
/// Unlike the native <see cref="Image.Clone"/> method this also copies animation frames.
/// </remarks>
/// </summary>
/// <param name="source">The source image to copy.</param>
/// <param name="format">The <see cref="PixelFormat"/> to set the copied image to.</param>
/// <returns>
/// The <see cref="Image"/>.
/// </returns>
public static Image Copy(this Image source, PixelFormat format = PixelFormat.Format32bppPArgb)
{
if (FormatUtilities.IsAnimated(source))
{
// TODO: Ensure that we handle other animated types.
GifDecoder decoder = new GifDecoder(source);
GifEncoder encoder = new GifEncoder(null, null, decoder.LoopCount);
foreach (GifFrame frame in decoder.GifFrames)
{
frame.Image = ((Bitmap)frame.Image).Clone(new Rectangle(0, 0, frame.Image.Width, frame.Image.Height), format);
((Bitmap)frame.Image).SetResolution(source.HorizontalResolution, source.VerticalResolution);
encoder.AddFrame(frame);
}
return(encoder.Save());
}
Bitmap copy = ((Bitmap)source).Clone(new Rectangle(0, 0, source.Width, source.Height), format);
copy.SetResolution(source.HorizontalResolution, source.VerticalResolution);
return(copy);
}
public void DecodeEncodeGlobeLocal()
{
ReportStart();
string filename = @"images/globe/spinning globe better 200px transparent background.gif";
_d = new GifDecoder(filename);
_d.Decode();
_e = new AnimatedGifEncoder();
_e.ColourTableStrategy = ColourTableStrategy.UseLocal;
foreach (GifFrame f in _d.Frames)
{
_e.AddFrame(new GifFrame(f.TheImage));
}
MemoryStream s = new MemoryStream();
_e.WriteToStream(s);
s.Seek(0, SeekOrigin.Begin);
_d = new GifDecoder(s);
_d.Decode();
CheckFrames();
ReportEnd();
}
public void DecodeEncodeSmileyLocal()
{
ReportStart();
string filename = @"images/smiley/smiley.gif";
_d = new GifDecoder(filename);
_d.Decode();
_e = new AnimatedGifEncoder();
_e.ColourTableStrategy = ColourTableStrategy.UseLocal;
foreach (GifFrame f in _d.Frames)
{
_e.AddFrame(new GifFrame(f.TheImage));
}
MemoryStream s = new MemoryStream();
_e.WriteToStream(s);
s.Seek(0, SeekOrigin.Begin);
_d = new GifDecoder(s);
_d.Decode();
CheckFrames();
ReportEnd();
}
public void Bug2940635()
{
ReportStart();
string gifName
= @"images\Bug2940635\Bug2940635TransparentColourIndexOutOfRangeException.gif";
_decoder = new GifDecoder(gifName);
_decoder.Decode();
string bmpName;
Image expectedBitmap;
Image actualBitmap;
for (int i = 0; i < _decoder.Frames.Count; i++)
{
actualBitmap = _decoder.Frames[i].TheImage;
bmpName = gifName + ".frame " + i + ".bmp";
expectedBitmap = Bitmap.FromFile(bmpName);
ImageAssert.AreEqual(expectedBitmap, actualBitmap, "Frame " + i);
}
ReportEnd();
}
public void ShowGif(string filePath)
{
if (!System.IO.Path.IsPathRooted(filePath))
{
filePath = System.IO.Path.Combine(Application.dataPath, filePath);
}
GifDecoder decoder = new GifDecoder();
m_Image = new GifImage();
DecodeWorker worker = new DecodeWorker(m_WorkerPriority)
{
m_Decoder = decoder,
m_FilePath = filePath,
m_Image = m_Image,
OnDecodeFinish = OnDecodeFinish
};
m_State = State.Decoding;
worker.Start();
}
public static bool GifToImage(string outPath, string gifFileName)
{
try
{
/* extract Gif */
GifDecoder gifDecoder = new GifDecoder();
gifDecoder.Read(gifFileName);
for (int i = 0, count = gifDecoder.GetFrameCount(); i < count; i++)
{
Image frame = gifDecoder.GetFrame(i); // frame i
frame.Save(outPath + Guid.NewGuid().ToString()
+ ".png", ImageFormat.Png);
frame.Dispose();
}
return(true);
}
catch
{
return(false);
}
}
static void Main(string[] args)
{
/* create Gif */
//you should replace filepath
string folder = "C:/Users/cardman/Documents/Visual Studio 2015/Projects/Gif/Example/bolt/";
//String [] imageFilePaths = new String[]{"G:\\01.png"};
String[] imageFilePaths = new String[] {
folder + "0.png", folder + "1.png", folder + "2.png",
folder + "3.png", folder + "4.png", folder + "5.png",
folder + "6.png", folder + "7.png", folder + "8.png", folder + "9.png"
};
//String outputFilePath = "G:\\test.gif";
String outputFilePath = folder + "bolt.gif";
AnimatedGifEncoder e = new AnimatedGifEncoder();
e.Start(outputFilePath);
e.SetDelay(500);
//-1:no repeat,0:always repeat
e.SetRepeat(0);
for (int i = 0, count = imageFilePaths.Length; i < count; i++)
{
e.AddFrame(Image.FromFile(imageFilePaths[i]));
}
e.Finish();
/* extract Gif */
//string outputPath = "G:\\";
string outputPath = folder;
GifDecoder gifDecoder = new GifDecoder();
//gifDecoder.Read( "G:\\test.gif" );
gifDecoder.Read(outputFilePath);
for (int i = 0, count = gifDecoder.GetFrameCount(); i < count; i++)
{
Image frame = gifDecoder.GetFrame(i); // frame i
frame.Save(outputPath + "_" + i + ".png", ImageFormat.Png);
}
}
public static int GetFrameCountEstimateFromFile(string fileName)
{
if (!File.Exists(fileName))
{
return(0);
}
int count;
try
{
using (GifDecoder decoder = new GifDecoder(fileName))
{
count = decoder.GetFrameCount();
}
}
catch (Types.InvalidDataException)
{
count = 1;
}
return(count);
}
/// <summary>
/// 把Gif文件转成Png文件，放在directory目录下
/// </summary>
/// <param name="giffile">gif文件</param>
/// <param name="directory">输出目录</param>
/// <param name="type">输出类型</param>
/// <returns></returns>
public void GifToPngs(string giffile, string directory, string type)
{
if (type != "jpg" && type != "png" && type != "bmp")
{
var ex = new NullReferenceException();
throw ex;
}
var gifDecoder = new GifDecoder();
directory += "\\";
if (!Directory.Exists(directory))
{
Directory.CreateDirectory(directory);
}
//读取
gifDecoder.Read(giffile);
for (int i = 0, count = gifDecoder.GetFrameCount(); i < count; i++)
{
Image frame = gifDecoder.GetFrame(i); // frame i
frame.Save(directory + "\\" + i.ToString("d3") + "." + type);
}
MessageBox.Show("gif解析完成");
}
public void Bug2940669()
{
ReportStart();
string folder = @"images\Bug2940669\";
string bmpName;
Image expectedBitmap;
Image actualBitmap;
foreach (string gifName in Directory.GetFiles(folder, "*.gif"))
{
_decoder = new GifDecoder(gifName);
_decoder.Decode();
for (int i = 0; i < _decoder.Frames.Count; i++)
{
actualBitmap = _decoder.Frames[i].TheImage;
bmpName = gifName + ".frame " + i + ".bmp";
expectedBitmap = Bitmap.FromFile(bmpName);
ImageAssert.AreEqual(expectedBitmap, actualBitmap,
gifName + " Frame " + i);
}
}
ReportEnd();
}
public static BRESNode FromGIF(string file)
{
string s = Path.GetFileNameWithoutExtension(file);
BRESNode b = new BRESNode()
{
_name = s
};
PAT0Node p = new PAT0Node()
{
_name = s
};
p.CreateEntry();
PAT0TextureNode t = p.Children[0].Children[0] as PAT0TextureNode;
GifDecoder d = new GifDecoder();
d.Read(file);
int f = d.GetFrameCount();
using (TextureConverterDialog dlg = new TextureConverterDialog())
{
dlg.Source = (Bitmap)d.GetFrame(0);
if (dlg.ShowDialog(null, b) == DialogResult.OK)
{
for (int i = 1; i < f; i++)
{
dlg.Source = (Bitmap)d.GetFrame(i);
dlg.EncodeSource();
}
}
}
return(b);
}
public void Process()
{
GifRepeatBehavior gifRepeatBehavior = new GifRepeatBehavior();
if (_iterationCount.IsInfinite)
{
gifRepeatBehavior.LoopForever = true;
}
else
{
gifRepeatBehavior.LoopForever = false;
gifRepeatBehavior.Count = (int)_iterationCount.Value;
}
_gifDecoder = new GifDecoder(_stream);
var pixSize = new PixelSize(_gifDecoder.Header.Dimensions.Width, _gifDecoder.Header.Dimensions.Height);
_targetBitmap = new WriteableBitmap(pixSize, new Vector(96, 96), PixelFormat.Bgra8888);
_targerImage.Source = _targetBitmap;
_bgWorker = new GifBackgroundWorker(_gifDecoder, gifRepeatBehavior);
_bgWorker.CurrentFrameChanged += FrameChanged;
Run();
}
public void ConsumeAnimatedGIFTest()
{
MemoryStream ms = new MemoryStream();
AnimatedGifEncoder encoder = new AnimatedGifEncoder();
// encoder.SetDelay(200);
encoder.SetFrameRate(5);
encoder.Start(ms);
for (char i = 'a'; i <= 'z'; i++)
{
Console.Write(i.ToString());
encoder.AddFrame(ThumbnailBitmap.GetBitmapFromText(i.ToString(), 48, 100, 200));
}
Console.WriteLine();
encoder.Finish();
ms.Flush();
ms.Seek(0, SeekOrigin.Begin);
GifDecoder decoder = new GifDecoder();
decoder.Read(ms);
Console.WriteLine("Frames: {0}", decoder.GetFrameCount());
Assert.AreEqual(26, decoder.GetFrameCount());
}
public void TestLoadGIF89a()
{
GifDecoder a_decoder = new GifDecoder();
Stream sm = Assembly.GetExecutingAssembly().GetManifestResourceStream("SnCore.Tools.Tests.Images.animated.gif");
Console.WriteLine("Bytes: {0}", sm.Length);
a_decoder.Read(sm);
Console.WriteLine("Frames: {0}", a_decoder.GetFrameCount());
sm.Seek(0, SeekOrigin.Begin);
Assert.IsNotNull(sm);
ThumbnailBitmap b = new ThumbnailBitmap(sm);
Console.WriteLine("Size: {0}x{1}", b.FullSize.Width, b.FullSize.Height);
Assert.AreEqual(new Size(320, 240), b.FullSize);
Assert.IsNotNull(b.Thumbnail);
Assert.IsNotNull(b.Bitmap);
ThumbnailBitmap th = new ThumbnailBitmap(b.Thumbnail);
Console.WriteLine("Size: {0}x{1}", th.FullSize.Width, th.FullSize.Height);
Assert.AreEqual(new Size(150, 100), th.FullSize);
// make sure that the bitmap is still animated
Console.WriteLine("Bytes: {0}", b.Bitmap.Length);
GifDecoder decoder = new GifDecoder();
decoder.Read(new MemoryStream(b.Bitmap));
Console.WriteLine("Frames: {0}", decoder.GetFrameCount());
GifDecoder th_decoder = new GifDecoder();
Console.WriteLine("Bytes: {0}", b.Thumbnail.Length);
th_decoder.Read(new MemoryStream(b.Thumbnail));
Console.WriteLine("Frames: {0}", th_decoder.GetFrameCount());
Assert.AreEqual(th_decoder.GetFrameCount(), decoder.GetFrameCount());
}
public void CompareQuantizers()
{
ReportStart();
string fileName;
DateTime startTime;
DateTime endTime;
TimeSpan encodingTime;
// Test actual quantization using image with 256+ colours.
string bitmapFileName = "images/" + TestFixtureName
+ "." + TestCaseName + ".bmp";
Bitmap b = new Bitmap( bitmapFileName );
for( int q = 1; q <= 20; q++ )
{
_e = new AnimatedGifEncoder();
_e.QuantizerType = QuantizerType.NeuQuant;
_e.SamplingFactor = q;
_e.AddFrame( new GifFrame( b ) );
fileName = TestFixtureName + "." + TestCaseName + ".NeuQuant." + q + ".gif";
startTime = DateTime.Now;
_e.WriteToFile( fileName );
endTime = DateTime.Now;
encodingTime = endTime - startTime;
WriteMessage( "Encoding with quantization using NeuQuant, quality="
+ q + " took " + encodingTime );
_d = new GifDecoder( fileName );
_d.Decode();
Assert.AreEqual( ErrorState.Ok, _d.ConsolidatedState, "Quality " + q );
Assert.AreEqual( 1, _d.Frames.Count, "Quality " + q );
// FIXME: NeuQuant quantizer reducing to 180 colours instead of 256 colours
// TODO: Check for exactly 256 colours once Octree quantizer returns 256-colour images
// Assert.AreEqual( 256, ImageTools.GetDistinctColours( colours ).Count );
Assert.LessOrEqual( ImageTools.GetDistinctColours( _d.Frames[0].TheImage ).Count, 256 );
for( int tolerance = 0; tolerance < 256; tolerance++ )
{
try
{
ImageAssert.AreEqual( b,
_d.Frames[0].TheImage,
tolerance,
"Quality " + q );
WriteMessage( "Quality " + q
+ " required tolerance " + tolerance );
break;
}
catch( AssertionExtensionException )
{
if( tolerance == 255 )
{
throw;
}
}
}
}
_e = new AnimatedGifEncoder();
_e.QuantizerType = QuantizerType.Octree;
_e.AddFrame( new GifFrame( b ) );
fileName = TestFixtureName + "." + TestCaseName + ".Octree.gif";
startTime = DateTime.Now;
_e.WriteToFile( fileName );
endTime = DateTime.Now;
encodingTime = endTime - startTime;
WriteMessage( "Encoding with quantization using Octree took " + encodingTime );
_d = new GifDecoder( fileName );
_d.Decode();
Assert.AreEqual( ErrorState.Ok, _d.ConsolidatedState );
Assert.AreEqual( 1, _d.Frames.Count );
// FIXME: Octree quantizer should return a 256-colour image here
// Assert.AreEqual( 256, ImageTools.GetDistinctColours( colours2 ).Count );
Assert.LessOrEqual( ImageTools.GetDistinctColours( _d.Frames[0].TheImage ).Count, 256 );
for( int tolerance = 0; tolerance < 256; tolerance++ )
{
try
{
ImageAssert.AreEqual( b,
_d.Frames[0].TheImage,
tolerance,
"Octree" );
WriteMessage( "Octree quantization required tolerance "
+ tolerance );
break;
}
catch( AssertionExtensionException )
{
if( tolerance == 255 )
{
throw;
}
}
}
// re-encoding an existing GIF should not cause quantization
_d = new GifDecoder( @"images\globe\spinning globe better 200px transparent background.gif" );
_d.Decode();
_e = new AnimatedGifEncoder();
// NB OctreeQuantizer does not support global colour tables (yet!)
_e.ColourTableStrategy = ColourTableStrategy.UseLocal;
foreach( GifFrame f in _d.Frames )
{
_e.AddFrame( new GifFrame( f.TheImage ) );
}
fileName = "NeuQuant.gif";
_e.QuantizerType = QuantizerType.NeuQuant;
startTime = DateTime.Now;
_e.WriteToFile( fileName );
endTime = DateTime.Now;
encodingTime = endTime - startTime;
WriteMessage( "Encoding without quantization using NeuQuant took " + encodingTime );
fileName = "Octree.gif";
_e.QuantizerType = QuantizerType.Octree;
startTime = DateTime.Now;
_e.WriteToFile( fileName );
endTime = DateTime.Now;
encodingTime = endTime - startTime;
WriteMessage( "Encoding without quantization using Octree took " + encodingTime );
GifDecoder nqDecoder = new GifDecoder( "NeuQuant.gif" );
nqDecoder.Decode();
GifDecoder otDecoder = new GifDecoder( "Octree.gif" );
otDecoder.Decode();
Assert.AreEqual( nqDecoder.Frames.Count, otDecoder.Frames.Count );
for( int i = 0; i < nqDecoder.Frames.Count; i++ )
{
ImageAssert.AreEqual( nqDecoder.Frames[i].TheImage,
otDecoder.Frames[i].TheImage,
"frame " + i );
}
ReportEnd();
}
public void Bug2940635()
{
ReportStart();
string gifName
= @"images\Bug2940635\Bug2940635TransparentColourIndexOutOfRangeException.gif";
_decoder = new GifDecoder( gifName );
_decoder.Decode();
string bmpName;
Image expectedBitmap;
Image actualBitmap;
for( int i = 0; i < _decoder.Frames.Count; i++ )
{
actualBitmap = _decoder.Frames[i].TheImage;
bmpName = gifName + ".frame " + i + ".bmp";
expectedBitmap = Bitmap.FromFile( bmpName );
ImageAssert.AreEqual( expectedBitmap, actualBitmap, "Frame " + i );
}
ReportEnd();
}
public void DecodeEncodeGlobeLocal()
{
ReportStart();
string filename = @"images/globe/spinning globe better 200px transparent background.gif";
_d = new GifDecoder( filename );
_d.Decode();
_e = new AnimatedGifEncoder();
_e.ColourTableStrategy = ColourTableStrategy.UseLocal;
foreach( GifFrame f in _d.Frames )
{
_e.AddFrame( new GifFrame( f.TheImage ) );
}
MemoryStream s = new MemoryStream();
_e.WriteToStream( s );
s.Seek( 0, SeekOrigin.Begin );
_d = new GifDecoder( s );
_d.Decode();
CheckFrames();
ReportEnd();
}
private void ConstructorStreamNullGraphicControlExtensionTest( bool xmlDebugging )
{
_decoder = new GifDecoder( @"images\NoGraphicControlExtension.gif",
xmlDebugging );
_decoder.Decode();
Assert.AreEqual( ErrorState.NoGraphicControlExtension,
_decoder.Frames[0].ErrorState );
Bitmap expected = new Bitmap( @"images\NoGraphicControlExtension.bmp" );
Bitmap actual = (Bitmap) _decoder.Frames[0].TheImage;
BitmapAssert.AreEqual( expected, actual );
if( xmlDebugging )
{
Assert.AreEqual( ExpectedDebugXml, _decoder.Frames[0].DebugXml );
}
}
private void ConstructorStreamUseLocalTest( bool xmlDebugging )
{
_decoder = new GifDecoder( @"images\wikipedia example UseLocal.gif",
xmlDebugging );
_decoder.Decode();
_frame = _decoder.Frames[0];
Assert.AreEqual( ErrorState.Ok, _frame.ConsolidatedState );
WikipediaExample.CheckImage( _frame.TheImage );
// Check image descriptor
ImageDescriptor id = _frame.ImageDescriptor;
Assert.AreEqual( true, id.HasLocalColourTable,
"HasLocalColourTable" );
Assert.AreEqual( false, id.IsInterlaced, "IsInterlaced" );
Assert.AreEqual( false, id.IsSorted, "LocalColourTableIsSorted" );
Assert.AreEqual( 4, id.LocalColourTableSize, "LocalColourTableSize" );
Assert.AreEqual( new Point( 0, 0 ), id.Position, "Position" );
Assert.AreEqual( new Size( 3, 5 ), id.Size, "Size" );
WikipediaExample.CheckGraphicControlExtension( _frame.GraphicControlExtension );
WikipediaExample.CheckImageData( _frame.IndexedPixels );
Assert.AreEqual( 0, _frame.BackgroundColour.R );
Assert.AreEqual( 0, _frame.BackgroundColour.G );
Assert.AreEqual( 0, _frame.BackgroundColour.B );
if( xmlDebugging )
{
Assert.AreEqual( ExpectedDebugXml, _frame.DebugXml );
}
}
public static AnimatedImage Load(Stream s)
{
GifDecoder g = new GifDecoder();
return g.DecodeImage(s);
}
public void BadSignature()
{
ReportStart();
string[] files = Directory.GetFiles( Directory.GetCurrentDirectory() );
foreach( string file in files )
{
Stream s = File.Open( file, FileMode.Open );
byte[] bytes = new byte[3];
s.Read( bytes, 0, 3 );
s.Close();
StringBuilder sb = new StringBuilder();
foreach( byte b in bytes )
{
sb.Append( (char) b );
}
if( sb.ToString() != "GIF" )
{
_decoder = new GifDecoder( file );
_decoder.Decode();
Assert.AreEqual( true,
_decoder.TestState( ErrorState.BadSignature ),
file + ": " + _decoder.ConsolidatedState );
}
}
ReportEnd();
}
public void Bug2892015()
{
ReportStart();
_e = new AnimatedGifEncoder();
#region create 10 random bitmaps
Collection<Bitmap> bitmaps = new Collection<Bitmap>();
for( int i = 0; i < 10; i++ )
{
Bitmap bitmap = RandomBitmap.Create( new Size( 50, 50 ),
10,
PixelFormat.Format32bppRgb );
bitmaps.Add( bitmap );
}
#endregion
DateTime startTime;
DateTime endTime;
#region create animation using just the first 3 (this should be quick)
for( int i = 0; i < 3; i++ )
{
_e.AddFrame( new GifFrame( bitmaps[i] ) );
}
startTime = DateTime.Now;
_e.WriteToFile( "2892015-1.gif" );
endTime = DateTime.Now;
TimeSpan runTime1 = endTime - startTime;
WriteMessage( "Encoding 3 frames took " + runTime1 );
#endregion
_e.Frames.Clear();
#region create animation using all the bitmaps (this will take longer)
foreach( Bitmap bitmap in bitmaps )
{
_e.AddFrame( new GifFrame( bitmap ) );
}
startTime = DateTime.Now;
_e.WriteToFile( "2892015-2.gif" );
endTime = DateTime.Now;
TimeSpan runTime2 = endTime - startTime;
WriteMessage( "Encoding all " + bitmaps.Count + " frames took " + runTime2 );
#endregion
_e.Frames.Clear();
#region create animation using just the first 3 (this should be quick)
for( int i = 0; i < 3; i++ )
{
_e.AddFrame( new GifFrame( bitmaps[i] ) );
}
startTime = DateTime.Now;
_e.WriteToFile( "2892015-3.gif" );
endTime = DateTime.Now;
TimeSpan runTime3 = endTime - startTime;
WriteMessage( "Encoding 3 frames took " + runTime3 );
#endregion
Assert.IsTrue( runTime3 < runTime2 );
_d = new GifDecoder( "2892015-3.gif" );
_d.Decode();
Assert.AreEqual( 3, _d.Frames.Count );
ReportEnd();
}
private void TestUseSuppliedPalette( ColourTableStrategy strategy )
{
string globalLocal
= strategy == ColourTableStrategy.UseGlobal
? "Global"
: "Local";
// First, create and check a series of single-frame GIFs, one for
// each of the available colour tables.
string[] files = Directory.GetFiles( @"ColourTables", "*.act" );
foreach( string act in files )
{
string actFileWithoutExtension
= Path.GetFileNameWithoutExtension( act );
_e = new AnimatedGifEncoder();
if( strategy == ColourTableStrategy.UseGlobal )
{
_e.Palette = Palette.FromFile( act );
Assert.AreEqual( ColourTableStrategy.UseGlobal,
_e.ColourTableStrategy );
// QuantizerType should default to UseSuppliedPalette when
// the encoder's Palette property is set.
Assert.AreEqual( QuantizerType.UseSuppliedPalette,
_e.QuantizerType );
}
else
{
_e.ColourTableStrategy = ColourTableStrategy.UseLocal;
Assert.AreEqual( ColourTableStrategy.UseLocal,
_e.ColourTableStrategy );
_e.QuantizerType = QuantizerType.UseSuppliedPalette;
Assert.AreEqual( QuantizerType.UseSuppliedPalette,
_e.QuantizerType );
}
GifFrame frame
= new GifFrame( Image.FromFile( @"images\smiley.bmp" ) );
if( strategy == ColourTableStrategy.UseLocal )
{
frame.Palette = Palette.FromFile( act );
}
_e.AddFrame( frame );
string fileName
= "AnimatedGifEncoderTest.UseSuppliedPalette"
+ globalLocal
+ "-"
+ actFileWithoutExtension
+ ".gif";
_e.WriteToFile( fileName );
_d = new GifDecoder( fileName, true );
_d.Decode();
Assert.AreEqual( ErrorState.Ok, _d.ConsolidatedState,
actFileWithoutExtension );
Assert.AreEqual( 1, _d.Frames.Count, actFileWithoutExtension );
if( strategy == ColourTableStrategy.UseGlobal )
{
Assert.AreEqual( true,
_d.LogicalScreenDescriptor.HasGlobalColourTable,
actFileWithoutExtension );
Assert.IsNotNull( _d.GlobalColourTable,
actFileWithoutExtension );
}
else
{
Assert.AreEqual( false,
_d.LogicalScreenDescriptor.HasGlobalColourTable,
actFileWithoutExtension );
Assert.IsNull( _d.GlobalColourTable, actFileWithoutExtension );
}
string expectedFileName
= @"images\Smiley\Smiley"
+ "-"
+ actFileWithoutExtension
+ ".bmp";
Image expected = Image.FromFile( expectedFileName );
ImageAssert.AreEqual( expected, _d.Frames[0].TheImage, expectedFileName );
}
// now encode a multi-frame animation with a user-supplied palette
_d = new GifDecoder( @"images\globe\spinning globe better 200px transparent background.gif" );
_d.Decode();
_e = new AnimatedGifEncoder();
_e.QuantizerType = QuantizerType.UseSuppliedPalette;
_e.Palette = Palette.FromFile( @"ColourTables\C64.act" );
foreach( GifFrame f in _d.Frames )
{
_e.AddFrame( f );
}
string globeFileName
= "AnimatedGifEncoderTest.UseSuppliedPalette"
+ globalLocal
+ ".gif";
_e.WriteToFile( globeFileName );
_d = new GifDecoder( globeFileName );
_d.Decode();
Assert.AreEqual( ErrorState.Ok, _d.ConsolidatedState );
Assert.AreEqual( _e.Frames.Count, _d.Frames.Count );
}
public void ConstructorStreamNoColourTableTest()
{
ReportStart();
_decoder = new GifDecoder( @"images\NoColourTable.gif" );
_decoder.Decode();
Assert.AreEqual( ErrorState.FrameHasNoColourTable, _decoder.ConsolidatedState );
ReportEnd();
}
public void NullStream()
{
ReportStart();
Stream stream = null;
try
{
_decoder = new GifDecoder( stream );
}
catch( ArgumentNullException ex )
{
StringAssert.Contains( "inputStream", ex.Message );
ReportEnd();
throw;
}
}
public void Bug2940669()
{
ReportStart();
string folder = @"images\Bug2940669\";
string bmpName;
Image expectedBitmap;
Image actualBitmap;
foreach( string gifName in Directory.GetFiles( folder, "*.gif" ) )
{
_decoder = new GifDecoder( gifName );
_decoder.Decode();
for( int i = 0; i < _decoder.Frames.Count; i++ )
{
actualBitmap = _decoder.Frames[i].TheImage;
bmpName = gifName + ".frame " + i + ".bmp";
expectedBitmap = Bitmap.FromFile( bmpName );
ImageAssert.AreEqual( expectedBitmap, actualBitmap,
gifName + " Frame " + i );
}
}
ReportEnd();
}
private void DecodeSmiley( bool xmlDebugging )
{
string fileName = @"images\smiley\smiley.gif";
_decoder = new GifDecoder( fileName, xmlDebugging );
_decoder.Decode();
_lsd = _decoder.LogicalScreenDescriptor;
int expectedColourTableSize = 128;
Assert.AreEqual( "GIF", _decoder.Header.Signature );
Assert.AreEqual( "89a", _decoder.Header.Version );
Assert.IsNotNull( _decoder.GlobalColourTable );
Assert.AreEqual( true, _lsd.HasGlobalColourTable );
Assert.AreEqual( expectedColourTableSize,
_lsd.GlobalColourTableSize );
Assert.AreEqual( expectedColourTableSize,
_decoder.GlobalColourTable.Length );
Assert.AreEqual( 7, _lsd.ColourResolution );
Assert.AreEqual( Color.FromArgb( 255, 0, 0, 255 ), _decoder.BackgroundColour );
Assert.AreEqual( 0, _lsd.BackgroundColourIndex );
Assert.AreEqual( false, _lsd.GlobalColourTableIsSorted );
Assert.AreEqual( 18, _lsd.LogicalScreenSize.Width );
Assert.AreEqual( 18, _lsd.LogicalScreenSize.Height );
Assert.AreEqual( 0, _lsd.PixelAspectRatio );
Assert.AreEqual( 0, _decoder.NetscapeExtension.LoopCount );
Assert.AreEqual( ErrorState.Ok, _decoder.ConsolidatedState );
Assert.AreEqual( 4, _decoder.Frames.Count );
int frameNumber = 0;
string frameId;
foreach( GifFrame thisFrame in _decoder.Frames )
{
frameId = "Frame " + frameNumber;
Assert.IsNull( thisFrame.LocalColourTable, frameId );
#region image descriptor properties
ImageDescriptor descriptor = thisFrame.ImageDescriptor;
Assert.AreEqual( false, descriptor.HasLocalColourTable, frameId );
Assert.AreEqual( expectedColourTableSize,
descriptor.LocalColourTableSize,
frameId );
Assert.AreEqual( false, descriptor.IsInterlaced, frameId );
Assert.AreEqual( false, descriptor.IsSorted, frameId );
#endregion
#region graphic control extension properties
GraphicControlExtension gce = thisFrame.GraphicControlExtension;
Assert.AreEqual( 4, gce.BlockSize, frameId );
Assert.AreEqual( 0, gce.TransparentColourIndex, frameId );
Assert.IsTrue( gce.HasTransparentColour, frameId );
Assert.IsFalse( gce.ExpectsUserInput, frameId );
#endregion
switch( frameNumber )
{
case 0:
Assert.AreEqual( 250, thisFrame.Delay, frameId );
Assert.AreEqual( 250, gce.DelayTime, frameId );
Assert.AreEqual( DisposalMethod.DoNotDispose,
gce.DisposalMethod, frameId );
break;
case 1:
Assert.AreEqual( 5, thisFrame.Delay, frameId );
Assert.AreEqual( 5, gce.DelayTime, frameId );
Assert.AreEqual( DisposalMethod.RestoreToBackgroundColour,
gce.DisposalMethod, frameId );
break;
case 2:
Assert.AreEqual( 10, thisFrame.Delay, frameId );
Assert.AreEqual( 10, gce.DelayTime, frameId );
Assert.AreEqual( DisposalMethod.RestoreToBackgroundColour,
gce.DisposalMethod, frameId );
break;
case 3:
Assert.AreEqual( 5, thisFrame.Delay, frameId );
Assert.AreEqual( 5, gce.DelayTime, frameId );
Assert.AreEqual( DisposalMethod.DoNotDispose,
gce.DisposalMethod, frameId );
break;
}
frameNumber++;
}
CompareFrames( fileName );
if( xmlDebugging )
{
Assert.AreEqual( ExpectedDebugXml, _decoder.DebugXml );
}
}
private void LookIn( string path )
{
_status = "Looking in " + path;
string[] gifs;
try
{
gifs = Directory.GetFiles( path, "*.gif" );
foreach( string gif in gifs )
{
_status = "Decoding " + gif;
try
{
GifDecoder decoder = new GifDecoder( gif );
decoder.Dispose();
}
catch( Exception )
{
WriteMessage( "Exception while decoding " + gif );
throw;
}
}
string[] folders = Directory.GetDirectories( path );
foreach( string folder in folders )
{
LookIn( folder );
}
}
catch( UnauthorizedAccessException )
{
// suppress
}
}
private void DecodeRotatingGlobe( bool xmlDebugging )
{
string fileName
= @"images\globe\spinning globe better 200px transparent background.gif";
_decoder = new GifDecoder( fileName, xmlDebugging );
WriteMessage( "Started decoding. XmlDebugging=" + xmlDebugging );
_decoder.Decode();
WriteMessage( "Finished decoding. XmlDebugging=" + xmlDebugging );
if( xmlDebugging )
{
Assert.AreEqual( ExpectedDebugXml, _decoder.DebugXml );
}
_lsd = _decoder.LogicalScreenDescriptor;
int expectedColourTableSize = 64;
Assert.AreEqual( ErrorState.Ok, _decoder.ConsolidatedState );
Assert.AreEqual( "GIF", _decoder.Header.Signature );
Assert.AreEqual( "89a", _decoder.Header.Version );
Assert.IsNotNull( _decoder.GlobalColourTable );
Assert.AreEqual( true, _lsd.HasGlobalColourTable );
Assert.AreEqual( expectedColourTableSize,
_lsd.GlobalColourTableSize );
Assert.AreEqual( expectedColourTableSize,
_decoder.GlobalColourTable.Length );
Assert.AreEqual( 2, _lsd.ColourResolution );
Assert.AreEqual( Color.FromArgb( 255, 255, 255, 255 ),
_decoder.BackgroundColour );
Assert.AreEqual( 63, _lsd.BackgroundColourIndex );
Assert.AreEqual( false, _lsd.GlobalColourTableIsSorted );
Assert.AreEqual( 200, _lsd.LogicalScreenSize.Width );
Assert.AreEqual( 191, _lsd.LogicalScreenSize.Height );
Assert.AreEqual( 0, _lsd.PixelAspectRatio );
Assert.AreEqual( 0, _decoder.NetscapeExtension.LoopCount );
Assert.AreEqual( ErrorState.Ok, _decoder.ErrorState );
Assert.AreEqual( 20, _decoder.Frames.Count );
int frameNumber = 0;
string frameId;
foreach( GifFrame thisFrame in _decoder.Frames )
{
frameId = "Frame " + frameNumber;
Assert.IsNull( thisFrame.LocalColourTable, frameId );
Assert.AreEqual( 10, thisFrame.Delay, frameId );
#region image descriptor tests
ImageDescriptor descriptor = thisFrame.ImageDescriptor;
Assert.AreEqual( false, descriptor.HasLocalColourTable, frameId );
Assert.AreEqual( 2,
descriptor.LocalColourTableSize,
frameId );
Assert.AreEqual( 200, descriptor.Size.Width, frameId );
Assert.AreEqual( 191, descriptor.Size.Height, frameId );
Assert.AreEqual( 0, descriptor.Position.X, frameId );
Assert.AreEqual( 0, descriptor.Position.Y, frameId );
Assert.AreEqual( false, descriptor.IsInterlaced, frameId );
Assert.AreEqual( false, descriptor.IsSorted, frameId );
#endregion
#region graphic control extension tests
GraphicControlExtension gce = thisFrame.GraphicControlExtension;
Assert.AreEqual( 4, gce.BlockSize, frameId );
Assert.AreEqual( 10, gce.DelayTime, frameId );
if( frameNumber == 19 )
{
Assert.AreEqual( DisposalMethod.DoNotDispose,
gce.DisposalMethod, frameId );
}
else
{
Assert.AreEqual( DisposalMethod.RestoreToBackgroundColour,
gce.DisposalMethod, frameId );
}
Assert.AreEqual( 63, gce.TransparentColourIndex, frameId );
Assert.IsTrue( gce.HasTransparentColour, frameId );
Assert.IsFalse( gce.ExpectsUserInput, frameId );
#endregion
frameNumber++;
}
CompareFrames( fileName );
}
public void FileNotFound()
{
ReportStart();
_decoder = new GifDecoder( "nonexist.gif" );
// Don't try to catch the exception because it's thrown by the CLR
// rather than by GifDecoder.
}
public void UnreadableStream()
{
ReportStart();
// open a write-only stream
Stream s = File.OpenWrite( "temp.temp" );
try
{
_decoder = new GifDecoder( s );
}
catch( ArgumentException ex )
{
s.Close();
string message
= "The supplied stream cannot be read";
Assert.AreEqual( "inputStream", ex.ParamName );
StringAssert.Contains( message, ex.Message );
ReportEnd();
throw;
}
finally
{
s.Close();
File.Delete( "temp.temp" );
}
}
/// <summary>
/// Tests the AnimatedGifEncoder and the encoded GIF file it produces
/// using the supplied parameters as property values.
/// </summary>
private void TestAnimatedGifEncoder( ColourTableStrategy strategy,
int colourQuality,
Size logicalScreenSize)
{
_e = new AnimatedGifEncoder();
// Check default properties set by constructor.
Assert.AreEqual( ColourTableStrategy.UseGlobal,
_e.ColourTableStrategy,
"Colour table strategy set by constructor" );
Assert.AreEqual( 10,
_e.SamplingFactor,
"Colour quantization quality set by constructor" );
Assert.AreEqual( Size.Empty,
_e.LogicalScreenSize,
"Logical screen size set by constructor" );
_e.ColourTableStrategy = strategy;
_e.SamplingFactor = colourQuality;
_e.LogicalScreenSize = logicalScreenSize;
// Check property set/gets
Assert.AreEqual( strategy,
_e.ColourTableStrategy,
"Colour table strategy property set/get" );
Assert.AreEqual( colourQuality,
_e.SamplingFactor,
"Colour quantization quality property set/get" );
Assert.AreEqual( logicalScreenSize,
_e.LogicalScreenSize,
"Logical screen size property get/set" );
foreach( GifFrame thisFrame in _frames )
{
_e.AddFrame( thisFrame );
}
StackTrace t = new StackTrace();
StackFrame f = t.GetFrame( 1 );
string fileName
= "Checks." + this.GetType().Name
+ "." + f.GetMethod().Name + ".gif";
_e.WriteToFile( fileName );
Stream s = File.OpenRead( fileName );
// global info
CheckGifHeader( s );
bool shouldHaveGlobalColourTable
= (strategy == ColourTableStrategy.UseGlobal);
LogicalScreenDescriptor lsd
= CheckLogicalScreenDescriptor( s, shouldHaveGlobalColourTable );
// Only check the global colour table if there should be one
ColourTable gct = null;
if( shouldHaveGlobalColourTable )
{
gct = CheckColourTable( s, lsd.GlobalColourTableSize );
}
CheckExtensionIntroducer( s );
CheckAppExtensionLabel( s );
CheckNetscapeExtension( s, 0 );
CheckFrame( s, gct, Bitmap1() );
CheckFrame( s, gct, Bitmap2() );
// end of image data
CheckGifTrailer( s );
CheckEndOfStream( s );
s.Close();
// Check the file using the decoder
_d = new GifDecoder( fileName );
_d.Decode();
Assert.AreEqual( ErrorState.Ok,
_d.ConsolidatedState,
"Decoder consolidated state" );
Assert.AreEqual( 2, _d.Frames.Count, "Decoder frame count" );
Assert.AreEqual( shouldHaveGlobalColourTable,
_d.LogicalScreenDescriptor.HasGlobalColourTable,
"Should have global colour table" );
Assert.AreEqual( logicalScreenSize,
_d.LogicalScreenDescriptor.LogicalScreenSize,
"Decoder logical screen size" );
BitmapAssert.AreEqual( Bitmap1(),
(Bitmap) _d.Frames[0].TheImage,
"frame 0" );
BitmapAssert.AreEqual( Bitmap2(),
(Bitmap) _d.Frames[1].TheImage,
"frame 1" );
bool shouldHaveLocalColourTable = !shouldHaveGlobalColourTable;
Assert.AreEqual( shouldHaveLocalColourTable,
_d.Frames[0].ImageDescriptor.HasLocalColourTable,
"Frame 0 has local colour table" );
Assert.AreEqual( shouldHaveLocalColourTable,
_d.Frames[1].ImageDescriptor.HasLocalColourTable,
"Frame 0 has local colour table" );
}
public void DecodeEncodeSmileyLocal()
{
ReportStart();
string filename = @"images/smiley/smiley.gif";
_d = new GifDecoder( filename );
_d.Decode();
_e = new AnimatedGifEncoder();
_e.ColourTableStrategy = ColourTableStrategy.UseLocal;
foreach( GifFrame f in _d.Frames )
{
_e.AddFrame( new GifFrame( f.TheImage ) );
}
MemoryStream s = new MemoryStream();
_e.WriteToStream( s );
s.Seek( 0, SeekOrigin.Begin );
_d = new GifDecoder( s );
_d.Decode();
CheckFrames();
ReportEnd();
}
public void WikipediaExampleTest()
{
ReportStart();
_e = new AnimatedGifEncoder();
GifFrame frame = new GifFrame( WikipediaExample.ExpectedBitmap );
frame.Delay = WikipediaExample.DelayTime;
_e.AddFrame( frame );
// TODO: some way of creating/testing a UseLocal version of WikipediaExample
string fileName = "WikipediaExampleUseGlobal.gif";
_e.WriteToFile( fileName );
Stream s = File.OpenRead( fileName );
int code;
// check GIF header
GifHeader gh = new GifHeader( s );
Assert.AreEqual( ErrorState.Ok, gh.ConsolidatedState );
// check logical screen descriptor
LogicalScreenDescriptor lsd = new LogicalScreenDescriptor( s );
Assert.AreEqual( ErrorState.Ok, lsd.ConsolidatedState );
WikipediaExample.CheckLogicalScreenDescriptor( lsd );
// read global colour table
ColourTable gct
= new ColourTable( s, WikipediaExample.GlobalColourTableSize );
Assert.AreEqual( ErrorState.Ok, gct.ConsolidatedState );
// cannot compare global colour table as different encoders will
// produce difference colour tables.
// WikipediaExample.CheckGlobalColourTable( gct );
// check for extension introducer
code = ExampleComponent.CallRead( s );
Assert.AreEqual( GifComponent.CodeExtensionIntroducer, code );
// check for app extension label
code = ExampleComponent.CallRead( s );
Assert.AreEqual( GifComponent.CodeApplicationExtensionLabel, code );
// check netscape extension
ApplicationExtension ae = new ApplicationExtension( s );
Assert.AreEqual( ErrorState.Ok, ae.ConsolidatedState );
NetscapeExtension ne = new NetscapeExtension( ae );
Assert.AreEqual( ErrorState.Ok, ne.ConsolidatedState );
Assert.AreEqual( 0, ne.LoopCount );
// check for extension introducer
code = ExampleComponent.CallRead( s );
Assert.AreEqual( GifComponent.CodeExtensionIntroducer, code );
// check for gce label
code = ExampleComponent.CallRead( s );
Assert.AreEqual( GifComponent.CodeGraphicControlLabel, code );
// check graphic control extension
GraphicControlExtension gce = new GraphicControlExtension( s );
Assert.AreEqual( ErrorState.Ok, gce.ConsolidatedState );
WikipediaExample.CheckGraphicControlExtension( gce );
// check for image separator
code = ExampleComponent.CallRead( s );
Assert.AreEqual( GifComponent.CodeImageSeparator, code );
// check for image descriptor
ImageDescriptor id = new ImageDescriptor( s );
Assert.AreEqual( ErrorState.Ok, id.ConsolidatedState );
WikipediaExample.CheckImageDescriptor( id );
// read, decode and check image data
// Cannot compare encoded LZW data directly as different encoders
// will create different colour tables, so even if the bitmaps are
// identical, the colour indices will be different
int pixelCount = WikipediaExample.FrameSize.Width
* WikipediaExample.FrameSize.Height;
TableBasedImageData tbid = new TableBasedImageData( s, pixelCount );
for( int y = 0; y < WikipediaExample.LogicalScreenSize.Height; y++ )
{
for( int x = 0; x < WikipediaExample.LogicalScreenSize.Width; x++ )
{
int i = (y * WikipediaExample.LogicalScreenSize.Width) + x;
Assert.AreEqual( WikipediaExample.ExpectedBitmap.GetPixel( x, y ),
gct[tbid.Pixels[i]],
"X: " + x + ", Y: " + y );
}
}
// Check for block terminator after image data
code = ExampleComponent.CallRead( s );
Assert.AreEqual( 0x00, code );
// check for GIF trailer
code = ExampleComponent.CallRead( s );
Assert.AreEqual( GifComponent.CodeTrailer, code );
// check we're at the end of the stream
code = ExampleComponent.CallRead( s );
Assert.AreEqual( -1, code );
s.Close();
_d = new GifDecoder( fileName );
_d.Decode();
Assert.AreEqual( ErrorState.Ok, _d.ConsolidatedState );
BitmapAssert.AreEqual( WikipediaExample.ExpectedBitmap,
(Bitmap) _d.Frames[0].TheImage,
"" );
ReportEnd();
}
public void NullFileName()
{
ReportStart();
string fileName = null;
try
{
_decoder = new GifDecoder( fileName );
}
catch( ArgumentNullException ex )
{
StringAssert.Contains( "name", ex.Message );
ReportEnd();
throw;
}
}
public void InterlaceTest()
{
ReportStart();
_decoder = new GifDecoder( @"images\Interlaced.gif" );
_decoder.Decode();
Assert.AreEqual( true, _decoder.Frames[0].ImageDescriptor.IsInterlaced );
Bitmap expected = new Bitmap( @"images\Interlaced.bmp" );
Bitmap actual = (Bitmap) _decoder.Frames[0].TheImage;
BitmapAssert.AreEqual( expected, actual );
ReportEnd();
}
public void PositionDecodedFrameGetTest()
{
ReportStart();
_decoder = new GifDecoder( @"images\smiley\smiley.gif" );
_decoder.Decode();
for( int i = 0; i < _decoder.Frames.Count; i++ )
{
_frame = _decoder.Frames[i];
Assert.AreEqual( _frame.ImageDescriptor.Position,
_frame.Position,
"Frame " + i );
}
ReportEnd();
}
public void PositionDecodedFrameSetTest()
{
ReportStart();
_decoder = new GifDecoder( @"images\smiley\smiley.gif" );
_decoder.Decode();
_frame = _decoder.Frames[0];
try
{
_frame.Position = new Point( 1, 1 );
}
catch( InvalidOperationException ex )
{
string message
= "This GifFrame was returned by a GifDecoder so this "
+ "property is read-only";
StringAssert.Contains( message, ex.Message );
ReportEnd();
throw;
}
}
public void LsdEndOfInputStream()
{
_decoder = new GifDecoder( GifFileName );
_decoder.Decode();
Assert.AreEqual( ErrorState.EndOfInputStream,
_decoder.ConsolidatedState );
}
public void TransparencyTest()
{
ReportStart();
Color noColour = Color.FromArgb( 0, 0, 0, 0 ); // note alpha of 0
Color blue = Color.FromArgb( 0, 0, 255 );
Color transparent = Color.FromArgb( 100, 100, 100 );
_encoder = new AnimatedGifEncoder();
_encoder.Transparent = transparent;
// transparent | transparent
// -------------------------
// blue | blue
Bitmap bitmap = new Bitmap( 2, 2 );
bitmap.SetPixel( 0, 0, transparent );
bitmap.SetPixel( 1, 0, transparent );
bitmap.SetPixel( 0, 1, blue );
bitmap.SetPixel( 1, 1, blue );
_frame = new GifFrame( bitmap );
_encoder.AddFrame( _frame );
// encode and decode
string filename = "GifFrameTest.TransparencyTest.gif";
_encoder.WriteToFile( filename );
_decoder = new GifDecoder( filename );
_decoder.Decode();
Assert.AreEqual( ErrorState.Ok, _decoder.ConsolidatedState );
// Result should be:
// black | black
// -------------
// blue | blue
Bitmap actual = (Bitmap) _decoder.Frames[0].TheImage;
Assert.AreEqual( noColour, actual.GetPixel( 0, 0 ) );
Assert.AreEqual( noColour, actual.GetPixel( 1, 0 ) );
Assert.AreEqual( blue, actual.GetPixel( 0, 1 ) );
Assert.AreEqual( blue, actual.GetPixel( 1, 1 ) );
ReportEnd();
}
public void ExpectsUserInputDecodedFrameGetTest()
{
ReportStart();
_decoder = new GifDecoder( @"images\smiley\smiley.gif" );
_decoder.Decode();
for( int i = 0; i < _decoder.Frames.Count; i++ )
{
_frame = _decoder.Frames[i];
Assert.AreEqual( _frame.GraphicControlExtension.ExpectsUserInput,
_frame.ExpectsUserInput,
"Frame " + i );
}
ReportEnd();
}
public void BadEncodingUsingGameboyPaletteLocal()
{
ReportStart();
_e = new AnimatedGifEncoder();
_e.ColourTableStrategy = ColourTableStrategy.UseLocal;
_e.QuantizerType = QuantizerType.UseSuppliedPalette;
GifFrame frame
= new GifFrame( Image.FromFile( @"images\smiley.bmp" ) );
_e.AddFrame( frame );
Assert.AreEqual( ColourTableStrategy.UseLocal, _e.ColourTableStrategy );
Assert.AreEqual( QuantizerType.UseSuppliedPalette, _e.QuantizerType );
frame.Palette = Palette.FromFile( @"ColourTables\gameboy.act" );
Assert.AreEqual( ColourTableStrategy.UseLocal, _e.ColourTableStrategy );
Assert.AreEqual( QuantizerType.UseSuppliedPalette, _e.QuantizerType );
_e.WriteToFile( GifFileName );
_d = new GifDecoder( GifFileName );
_d.Decode();
Assert.AreEqual( ErrorState.Ok, _d.ConsolidatedState );
ReportEnd();
}
