/// <summary>
/// Encodes the image as webp to the specified stream.
/// </summary>
/// <typeparam name="TPixel">The pixel format.</typeparam>
/// <param name="image">The <see cref="ImageFrame{TPixel}"/> to encode from.</param>
/// <param name="stream">The <see cref="Stream"/> to encode the image data to.</param>
/// <param name="cancellationToken">The token to monitor for cancellation requests.</param>
public void Encode <TPixel>(Image <TPixel> image, Stream stream, CancellationToken cancellationToken)
where TPixel : unmanaged, IPixel <TPixel>
{
Guard.NotNull(image, nameof(image));
Guard.NotNull(stream, nameof(stream));
this.configuration = image.GetConfiguration();
bool lossless;
if (this.fileFormat is not null)
{
lossless = this.fileFormat == WebpFileFormatType.Lossless;
}
else
{
WebpMetadata webpMetadata = image.Metadata.GetWebpMetadata();
lossless = webpMetadata.FileFormat == WebpFileFormatType.Lossless;
}
if (lossless)
{
using var enc = new Vp8LEncoder(
this.memoryAllocator,
this.configuration,
image.Width,
image.Height,
this.quality,
this.method,
this.transparentColorMode,
this.nearLossless,
this.nearLosslessQuality);
enc.Encode(image, stream);
}
else
{
using var enc = new Vp8Encoder(
this.memoryAllocator,
this.configuration,
image.Width,
image.Height,
this.quality,
this.method,
this.entropyPasses,
this.filterStrength,
this.spatialNoiseShaping,
this.alphaCompression);
enc.Encode(image, stream);
}
}
/// <summary>
/// Initializes a new instance of the <see cref="Vp8BitWriter"/> class.
/// </summary>
/// <param name="expectedSize">The expected size in bytes.</param>
/// <param name="enc">The Vp8Encoder.</param>
public Vp8BitWriter(int expectedSize, Vp8Encoder enc)
: this(expectedSize) => this.enc = enc;
