/// <summary>
/// Initializes a new instance of the <see cref="GifEncoderCore"/> class.
/// </summary>
/// <param name="memoryAllocator">The <see cref="MemoryAllocator"/> to use for buffer allocations.</param>
/// <param name="options">The options for the encoder.</param>
public GifEncoderCore(MemoryAllocator memoryAllocator, IGifEncoderOptions options)
{
this.memoryAllocator = memoryAllocator;
this.textEncoding = options.TextEncoding ?? GifConstants.DefaultEncoding;
this.quantizer = options.Quantizer;
this.colorTableMode = options.ColorTableMode;
this.ignoreMetadata = options.IgnoreMetadata;
}
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 <Rgba32>(inStream);
GifMetadata metaData = image.Metadata.GetGifMetadata();
GifFrameMetadata frameMetadata = image.Frames.RootFrame.Metadata.GetGifMetadata();
GifColorTableMode colorMode = metaData.ColorTableMode;
var encoder = new GifEncoder
{
ColorTableMode = colorMode,
Quantizer = new OctreeQuantizer(new QuantizerOptions {
MaxColors = frameMetadata.ColorTableLength
})
};
image.Save(outStream, encoder);
outStream.Position = 0;
outStream.Position = 0;
var clone = Image.Load <Rgba32>(outStream);
GifMetadata cloneMetadata = clone.Metadata.GetGifMetadata();
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.GetGifMetadata();
GifFrameMetadata cifm = clone.Frames[i].Metadata.GetGifMetadata();
Assert.Equal(ifm.ColorTableLength, cifm.ColorTableLength);
Assert.Equal(ifm.FrameDelay, cifm.FrameDelay);
}
image.Dispose();
clone.Dispose();
}
}
