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 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();
}
static void Main(string[] args)
{
GifImage gifImage = GifDecoder.Decode(@"..\..\..\Examples\worldmap2.gif");
ColorRGB[] globalPalette = ColorRGB.MakePalette(gifImage.GlobalColorTable);
GifCube cube = new GifCube();
byte sliceT = 0;
foreach (GifFrame f in gifImage.Frames)
{
byte[] colorTableBytes = f.LocalColorTable;
ColorRGB[] palette;
if (colorTableBytes == null)
{
palette = globalPalette;
}
else
{
palette = ColorRGB.MakePalette(colorTableBytes);
}
cube.AddFrame(sliceT, new GifCubeSlice(f.IndexedPixel, gifImage.Width, palette));
}
GifScriptState scriptState = new GifScriptState();
scriptState.Init(cube);
while (!scriptState.halted)
{
scriptState.Tick();
}
}
public void LsdEndOfInputStream()
{
_decoder = new GifDecoder(GifFileName);
_decoder.Decode();
Assert.AreEqual(ErrorState.EndOfInputStream,
_decoder.ConsolidatedState);
}
/// <summary>
/// 将Gif图片进行旋转或者翻转
/// </summary>
/// <param name="gifFilePath">原图像路径</param>
/// <param name="rotateType">翻转或者旋转方式</param>
/// <param name="outputPath">输出路径</param>
public static void Rotate(string gifFilePath, RotateFlipType rotateType, string outputPath)
{
if (!File.Exists(gifFilePath))
{
throw new IOException(string.Format("文件{0}不存在!", gifFilePath));
}
using (Bitmap ora_Img = new Bitmap(gifFilePath))
{
if (ora_Img.RawFormat.Guid != ImageFormat.Gif.Guid)
{
throw new IOException(string.Format("文件{0}!", gifFilePath));
}
}
GifImage gifImage = GifDecoder.Decode(gifFilePath);
ThinkDisposalMethod(gifImage);
int index = 0;
foreach (GifFrame f in gifImage.Frames)
{
f.Image.RotateFlip(rotateType);
f.ImageDescriptor.Width = (short)f.Image.Width;
f.ImageDescriptor.Height = (short)f.Image.Height;
if (index++ == 0)
{
gifImage.LogicalScreenDescriptor.Width = (short)f.Image.Width;
gifImage.LogicalScreenDescriptor.Height = (short)f.Image.Height;
}
}
GifEncoder.Encode(gifImage, outputPath);
}
/// <summary>
/// 对gif动画添加水印
/// </summary>
/// <param name="gifFilePath">原gif动画的路径</param>
/// <param name="text">水印文字</param>
/// <param name="textForceColor">水印文字的颜色，因为gif不是真彩色图片，所以在显示的时候，该颜色可能有所误差，但基本上可以确定颜色范围</param>
/// <param name="font">字体</param>
/// <param name="x">水印位置横坐标</param>
/// <param name="y">水印位置纵坐标</param>
/// <param name="outputPath">输出路径</param>
public static void SmartWaterMark(string gifFilePath, string text, Color textForceColor, Font font, float x, float y, string outputPath)
{
if (!File.Exists(gifFilePath))
{
throw new IOException(string.Format("文件{0}不存在!", gifFilePath));
}
using (Bitmap ora_Img = new Bitmap(gifFilePath))
{
if (ora_Img.RawFormat.Guid != ImageFormat.Gif.Guid)
{
throw new IOException(string.Format("文件{0}!", gifFilePath));
}
}
GifImage gifImage = GifDecoder.Decode(gifFilePath);
ThinkDisposalMethod(gifImage);
Color textColor = textForceColor;// Color.FromArgb(closestC);
foreach (GifFrame f in gifImage.Frames)
{
Graphics g = Graphics.FromImage(f.Image);
g.DrawString(text, font, new SolidBrush(textColor), new PointF(x, y));
g.Dispose();
}
GifEncoder.Encode(gifImage, outputPath);
}
private void init(Stream stream, GIFFrameUpdatedCallbackMethod frameUpdatedCallback)
{
// set gif frame update callback
this.FrameUpdatedCallback = frameUpdatedCallback;
// decode gif image
var gifDecoder = new GifDecoder();
var image = new ExtendedImage();
gifDecoder.Decode(image, stream);
// add frames and load unity textures
frames = new List <TextureGIFFrame>();
var firstFrame = new TextureGIFFrame(createTexture(image.PixelWidth, image.PixelHeight, image.Pixels), TimeSpan.FromSeconds(image.DelayTime / 100d));
frames.Add(firstFrame);
var lastFrame = firstFrame;
foreach (var frame in image.Frames)
{
var newFrame = new TextureGIFFrame(createTexture(frame.PixelWidth, frame.PixelHeight, frame.Pixels), TimeSpan.FromSeconds(frame.DelayTime / 100d));
frames.Add(newFrame);
if (lastFrame != null)
{
lastFrame.nextFrame = newFrame;
}
lastFrame = newFrame;
}
// set starting image
CurrentFrame = frames[0];
lastFrame.nextFrame = firstFrame;
}
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);
}
}
/// <summary>
/// 对Gif图片进行剪裁
/// </summary>
/// <param name="gifFilePath">原图像</param>
/// <param name="rect">剪裁区域</param>
/// <param name="outFilePath">输出路径</param>
public static void Crop(string gifFilePath, Rectangle rect, string outFilePath)
{
if (!File.Exists(gifFilePath))
{
throw new IOException(string.Format("文件{0}不存在!", gifFilePath));
}
using (Bitmap ora_Img = new Bitmap(gifFilePath))
{
if (ora_Img.RawFormat.Guid != ImageFormat.Gif.Guid)
{
throw new IOException(string.Format("文件{0}!", gifFilePath));
}
}
GifImage gifImage = GifDecoder.Decode(gifFilePath);
ThinkDisposalMethod(gifImage);
int index = 0;
foreach (GifFrame f in gifImage.Frames)
{
f.Image = f.Image.Clone(rect, f.Image.PixelFormat);
f.ImageDescriptor.Width = (short)rect.Width;
f.ImageDescriptor.Height = (short)rect.Height;
if (index++ == 0)
{
gifImage.LogicalScreenDescriptor.Width = (short)rect.Width;
gifImage.LogicalScreenDescriptor.Height = (short)rect.Height;
}
}
GifEncoder.Encode(gifImage, outFilePath);
}
public void ConstructorStreamNoColourTableTest()
{
ReportStart();
_decoder = new GifDecoder(@"images\NoColourTable.gif");
_decoder.Decode();
Assert.AreEqual(ErrorState.FrameHasNoColourTable, _decoder.ConsolidatedState);
ReportEnd();
}
public static Image FromFile(string filename)
{
//TODO: review here
//should not depend on the extension
string fileext = IO.Path.GetExtension(filename).ToLower();
switch (fileext)
{
default:
throw new NotSupportedException();
case ".jpg":
{
JpegDecoder jpegDec = new JpegDecoder();
ImageTools.ExtendedImage outputImg = new ImageTools.ExtendedImage();
using (System.IO.FileStream fs = new IO.FileStream(filename, IO.FileMode.Open))
{
jpegDec.Decode(outputImg, fs);
}
//return bitmap
return(new Bitmap(outputImg.PixelWidth, outputImg.PixelHeight, outputImg.Pixels,
outputImg.DensityXInt32, outputImg.DensityYInt32));
}
case ".gif":
{
GifDecoder gifDec = new GifDecoder();
ImageTools.ExtendedImage outputImg = new ImageTools.ExtendedImage();
using (System.IO.FileStream fs = new IO.FileStream(filename, IO.FileMode.Open))
{
gifDec.Decode(outputImg, fs);
}
//return bitmap
return(new Bitmap(outputImg.PixelWidth, outputImg.PixelHeight, outputImg.Pixels,
outputImg.DensityXInt32, outputImg.DensityYInt32));
}
case ".png":
{
ImageTools.IO.Png.PngDecoder pngDecoder = new PngDecoder();
//HjgPngDecoder pngDecoder = new HjgPngDecoder();
//PngDecoder pngDecoder = new PngDecoder();
ImageTools.ExtendedImage outputImg = new ImageTools.ExtendedImage();
using (System.IO.FileStream fs = new IO.FileStream(filename, IO.FileMode.Open))
{
pngDecoder.Decode(outputImg, fs);
}
Bitmap bmp = new Bitmap(outputImg.PixelWidth,
outputImg.PixelHeight, outputImg.Pixels,
outputImg.DensityXInt32, outputImg.DensityYInt32);
bmp.PixelFormat = Imaging.PixelFormat.Format32bppArgb;
return(bmp);
}
}
return(null);
}
public GifTexture(byte[] buffer)
{
gif = GifDecoder.Decode(buffer);
if (gif == null)
{
throw new System.Exception("Could not decode gif");
}
SetFirstFrame();
}
public GifTexture(string filename)
{
gif = GifDecoder.Decode(filename);
if (gif == null)
{
throw new System.Exception("Could not decode gif");
}
SetFirstFrame();
}
public static Image <Rgba32> ReadGif(Stream stream)
{
var decoder = new GifDecoder
{
DecodingMode = FrameDecodingMode.All
};
var gif = decoder.Decode <Rgba32>(new Configuration(), stream);
stream.Dispose();
return(gif);
}
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();
}
private void LoadGif()
{
try
{
_decoder.Decode();
Invoke(new MethodInvoker(StopTheClock));
}
catch (Exception ex)
{
HandleException(ex);
}
}
public void Decode_VerifyRepeatCount(string imagePath, uint repeatCount)
{
var testFile = TestFile.Create(imagePath);
using (var stream = new MemoryStream(testFile.Bytes, false))
{
var decoder = new GifDecoder();
using (Image <Rgba32> image = decoder.Decode <Rgba32>(Configuration.Default, stream))
{
GifMetadata meta = image.Metadata.GetGifMetadata();
Assert.Equal(repeatCount, meta.RepeatCount);
}
}
}
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 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 Decode_VerifyRatio(string imagePath, int xResolution, int yResolution, PixelResolutionUnit resolutionUnit)
{
var testFile = TestFile.Create(imagePath);
using (var stream = new MemoryStream(testFile.Bytes, false))
{
var decoder = new GifDecoder();
using (Image <Rgba32> image = decoder.Decode <Rgba32>(Configuration.Default, stream))
{
ImageMetaData meta = image.MetaData;
Assert.Equal(xResolution, meta.HorizontalResolution);
Assert.Equal(yResolution, meta.VerticalResolution);
Assert.Equal(resolutionUnit, meta.ResolutionUnits);
}
}
}
/// <summary>
/// 获取gif动画的缩略图
/// </summary>
/// <param name="gifFilePath">原gif图片路径</param>
/// <param name="rate">缩放大小</param>
/// <param name="outputPath">缩略图大小</param>
public static void GetThumbnail(string gifFilePath, double rate, string outputPath)
{
if (!File.Exists(gifFilePath))
{
throw new IOException(string.Format("文件{0}不存在!", gifFilePath));
}
using (Bitmap ora_Img = new Bitmap(gifFilePath))
{
if (ora_Img.RawFormat.Guid != ImageFormat.Gif.Guid)
{
throw new IOException(string.Format("文件{0}!", gifFilePath));
}
}
GifImage gifImage = GifDecoder.Decode(gifFilePath);
if (rate != 1.0)
{
gifImage.LogicalScreenDescriptor.Width = (short)(gifImage.LogicalScreenDescriptor.Width * rate);
gifImage.LogicalScreenDescriptor.Height = (short)(gifImage.LogicalScreenDescriptor.Height * rate);
int index = 0;
foreach (GifFrame f in gifImage.Frames)
{
f.ImageDescriptor.XOffSet = (short)(f.ImageDescriptor.XOffSet * rate);
f.ImageDescriptor.YOffSet = (short)(f.ImageDescriptor.YOffSet * rate);
f.ImageDescriptor.Width = (short)(f.ImageDescriptor.Width * rate);
f.ImageDescriptor.Height = (short)(f.ImageDescriptor.Height * rate);
if (f.ImageDescriptor.Width == 0)
{
f.ImageDescriptor.Width = 1;
}
if (f.ImageDescriptor.Height == 0)
{
f.ImageDescriptor.Height = 1;
}
Bitmap bmp = new Bitmap(f.ImageDescriptor.Width, f.ImageDescriptor.Height);
Graphics g = Graphics.FromImage(bmp);
g.DrawImage(f.Image, new Rectangle(0, 0, f.ImageDescriptor.Width, f.ImageDescriptor.Height));
g.Dispose();
Quantizer(bmp, f.Palette);
f.Image.Dispose();
f.Image = bmp;
index++;
}
GifEncoder.Encode(gifImage, outputPath);
}
}
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);
}
}
/// <summary>
/// 对gif动画添加图片水印
/// </summary>
/// <param name="gifFilePath">原图片路径</param>
/// <param name="waterImg">水印图片</param>
/// <param name="x">横坐标</param>
/// <param name="y">纵坐标</param>
/// <param name="outputPath">输出路径</param>
public static void WaterMark(string gifFilePath, Bitmap waterImg, float x, float y, string outputPath)
{
if (!File.Exists(gifFilePath))
{
throw new IOException(string.Format("文件{0}不存在!", gifFilePath));
}
using (Bitmap ora_Img = new Bitmap(gifFilePath))
{
if (ora_Img.RawFormat.Guid != ImageFormat.Gif.Guid)
{
throw new IOException(string.Format("文件{0}!", gifFilePath));
}
}
GifImage gifImage = GifDecoder.Decode(gifFilePath);
ThinkDisposalMethod(gifImage);
foreach (GifFrame f in gifImage.Frames)
{
Graphics g = Graphics.FromImage(f.Image);
g.DrawImage(waterImg, new PointF(x, y));
g.Dispose();
OcTreeQuantizer q = new OcTreeQuantizer(8);
Color32[] cs = q.Quantizer(f.Image);
byte[] lct = new byte[cs.Length * 3];
int index = 0;
int colorCount = 0;
foreach (Color32 c in cs)
{
lct[index++] = c.Red;
lct[index++] = c.Green;
lct[index++] = c.Blue;
if (c.ARGB == f.BgColor.ARGB)
{
f.GraphicExtension.TranIndex = (byte)colorCount;
}
colorCount++;
}
Quantizer(f.Image, cs);
f.LocalColorTable = lct;
f.ImageDescriptor.LctFlag = true;
f.ImageDescriptor.LctSize = 256;
f.ColorDepth = 8;
}
GifEncoder.Encode(gifImage, outputPath);
}
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));
}
});
}
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));
}
}
}
}
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 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 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();
}
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 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 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();
}
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 );
}
}
public void LsdEndOfInputStream()
{
_decoder = new GifDecoder( GifFileName );
_decoder.Decode();
Assert.AreEqual( ErrorState.EndOfInputStream,
_decoder.ConsolidatedState );
}
public void ConstructorStreamNoColourTableTest()
{
ReportStart();
_decoder = new GifDecoder( @"images\NoColourTable.gif" );
_decoder.Decode();
Assert.AreEqual( ErrorState.FrameHasNoColourTable, _decoder.ConsolidatedState );
ReportEnd();
}
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 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 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 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 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();
}
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 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 );
}
/// <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 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 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();
}
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 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 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();
}
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 );
}
}
