public void CloneIsDeep()
{
var meta = new GifMetaData()
{
RepeatCount = 1,
ColorTableMode = GifColorTableMode.Global,
GlobalColorTableLength = 2
};
var clone = (GifMetaData)meta.DeepClone();
clone.RepeatCount = 2;
clone.ColorTableMode = GifColorTableMode.Local;
clone.GlobalColorTableLength = 1;
Assert.False(meta.RepeatCount.Equals(clone.RepeatCount));
Assert.False(meta.ColorTableMode.Equals(clone.ColorTableMode));
Assert.False(meta.GlobalColorTableLength.Equals(clone.GlobalColorTableLength));
}
public void NonMutatingEncodePreservesPaletteCount()
{
using (var inStream = new MemoryStream(TestFile.Create(TestImages.Gif.Leo).Bytes))
using (var outStream = new MemoryStream())
{
inStream.Position = 0;
var image = Image.Load(inStream);
GifMetaData metaData = image.MetaData.GetFormatMetaData(GifFormat.Instance);
GifFrameMetaData frameMetaData = image.Frames.RootFrame.MetaData.GetFormatMetaData(GifFormat.Instance);
GifColorTableMode colorMode = metaData.ColorTableMode;
var encoder = new GifEncoder()
{
ColorTableMode = colorMode,
Quantizer = new OctreeQuantizer(frameMetaData.ColorTableLength)
};
image.Save(outStream, encoder);
outStream.Position = 0;
outStream.Position = 0;
var clone = Image.Load(outStream);
GifMetaData cloneMetaData = clone.MetaData.GetFormatMetaData <GifMetaData>(GifFormat.Instance);
Assert.Equal(metaData.ColorTableMode, cloneMetaData.ColorTableMode);
// Gifiddle and Cyotek GifInfo say this image has 64 colors.
Assert.Equal(64, frameMetaData.ColorTableLength);
for (int i = 0; i < image.Frames.Count; i++)
{
GifFrameMetaData ifm = image.Frames[i].MetaData.GetFormatMetaData(GifFormat.Instance);
GifFrameMetaData cifm = clone.Frames[i].MetaData.GetFormatMetaData(GifFormat.Instance);
Assert.Equal(ifm.ColorTableLength, cifm.ColorTableLength);
Assert.Equal(ifm.FrameDelay, cifm.FrameDelay);
}
image.Dispose();
clone.Dispose();
}
}
public static ObjectAnimationUsingKeyFrames CreateFrames(GifBitmapDecoder decoder)
{
if (decoder == null)
{
return(null);
}
ObjectAnimationUsingKeyFrames animation = new ObjectAnimationUsingKeyFrames();
// Read MetaData from GIF
// this give us the Width and Height of the GIF
GifMetaData gifData = GifMetaDataReader.GetGifMetaData(decoder);
if (gifData == null)
{
return(null);
}
TimeSpan animationTime = TimeSpan.FromMilliseconds(0);
BitmapSource baseFrame = null;
// create a animation for every frame in GIF
foreach (BitmapFrame curFrame in decoder.Frames)
{
// first we need to read the metadata from the frame
// to know the position, width, height, delay and disposalmethod
GifFrameMetaData frameMetaData = GifMetaDataReader.GetGifFrameMetaData(curFrame);
if (frameMetaData != null)
{
// Create a "image" from the current frame
BitmapSource CurCreatedFrame =
GifImageFrameCreator.CreateFrame(
new System.Drawing.Size(gifData.Width, gifData.Height),
curFrame, frameMetaData, baseFrame);
// add the frame to the animaton
animation.KeyFrames.Add(new DiscreteObjectKeyFrame()
{
KeyTime = animationTime,
Value = CurCreatedFrame
});
// Check the disposal method
switch (frameMetaData.DisposalMethod)
{
case GifFrameDisposalMethod.None:
break;
case GifFrameDisposalMethod.DoNotDispose:
baseFrame = CurCreatedFrame;
break;
case GifFrameDisposalMethod.RestoreBackground:
baseFrame = GifImageFrameCreator.RestoreBackground(new System.Drawing.Size(gifData.Width, gifData.Height), curFrame, frameMetaData);
break;
case GifFrameDisposalMethod.RestorePrevious:
break;
default:
break;
}
// increse the timeline with the delay of the frame
animationTime += frameMetaData.Delay;
}
}
animation.Duration = animationTime;
return(animation);
}
/// <summary>
/// Initializes a new instance of the <see cref="GifMetaData"/> class.
/// </summary>
/// <param name="other">The metadata to create an instance from.</param>
private GifMetaData(GifMetaData other)
{
this.RepeatCount = other.RepeatCount;
this.ColorTableMode = other.ColorTableMode;
this.GlobalColorTableLength = other.GlobalColorTableLength;
}
