/// <summary>
/// Encodes the image using a specified encoder.
/// </summary>
/// <param name="imageEncoder">The image encoder to use.</param>
/// <returns>A new, corresponding encoded image.</returns>
public EncodedImage Encode(IImageToStreamEncoder imageEncoder)
{
var encodedImage = new EncodedImage(this.Width, this.Height, this.PixelFormat);
encodedImage.EncodeFrom(this, imageEncoder);
return(encodedImage);
}
/// <summary>
/// Encodes an image in-place into the given encoded image instance using the specified encoder.
/// </summary>
/// <param name="encodedImage">Encoded image into which to encode in-place.</param>
/// <param name="image">Image to be encoded.</param>
/// <param name="encoder">Encoder to use.</param>
public static void EncodeFrom(EncodedImage encodedImage, Image image, BitmapEncoder encoder)
{
System.Windows.Media.PixelFormat format;
if (image.PixelFormat == PixelFormat.BGR_24bpp)
{
format = System.Windows.Media.PixelFormats.Bgr24;
}
else if (image.PixelFormat == PixelFormat.Gray_16bpp)
{
format = System.Windows.Media.PixelFormats.Gray16;
}
else if (image.PixelFormat == PixelFormat.Gray_8bpp)
{
format = System.Windows.Media.PixelFormats.Gray8;
}
else
{
format = System.Windows.Media.PixelFormats.Bgr32;
}
encodedImage.EncodeFrom(image, (_, stream) =>
{
BitmapSource bitmapSource = BitmapSource.Create(image.Width, image.Height, 96, 96, format, null, image.ImageData, image.Stride * image.Height, image.Stride);
encoder.Frames.Add(BitmapFrame.Create(bitmapSource));
encoder.Save(stream);
});
}
/// <summary>
/// Decodes a specified encoded image with a specified decoder into the current image.
/// </summary>
/// <param name="encodedImage">The encoded image to decode.</param>
/// <param name="imageDecoder">The image decoder to use.</param>
/// <remarks>The image width, height and pixel format must match. The method should not be called concurrently.</remarks>
public void DecodeFrom(EncodedImage encodedImage, IImageFromStreamDecoder imageDecoder)
{
if (encodedImage.Width != this.Width || encodedImage.Height != this.Height ||
(encodedImage.PixelFormat != PixelFormat.Undefined && encodedImage.PixelFormat != this.PixelFormat))
{
throw new InvalidOperationException("Cannot decode from an encoded image that has a different width, height, or pixel format.");
}
imageDecoder.DecodeFromStream(encodedImage.ToStream(), this);
}