/// <summary>
/// Resizes an image represented by a stream.
/// </summary>
/// <param name="inputStream">The input stream.</param>
/// <param name="options">The options.</param>
/// <param name="outputFormat">The output format.</param>
/// <returns>The image stream.</returns>
public virtual Stream ResizeImageFromStream(Stream inputStream, TransformationOptions options, ImageFormat outputFormat)
{
Assert.ArgumentNotNull((object)inputStream, "inputStream");
Assert.ArgumentNotNull((object)options, "options");
Assert.ArgumentNotNull((object)outputFormat, "outputFormat");
ResizeOptions resizeOptions = this.GetResizeOptions(options);
if (resizeOptions.IsEmpty)
{
return(inputStream);
}
if (inputStream.Length > Settings.Media.MaxSizeInMemory)
{
Tracer.Error((object)"Could not resize image stream as it was larger than the maximum size allowed for memory processing.");
return((Stream)null);
}
if (Settings.Media.UseLegacyResizing)
{
return(this.ResizeLegacy(inputStream, options, outputFormat));
}
Resizer resizer = new Resizer();
using (Bitmap originalBitmap = new Bitmap((Stream)inputStream))
{
Size frameSize = resizer.GetFrameSize(originalBitmap, resizeOptions);
if (originalBitmap.Size.Equals((object)frameSize))
{
inputStream.Seek(0L, SeekOrigin.Begin);
return((Stream)inputStream);
}
using (Bitmap resizedBitmap = resizer.Resize(originalBitmap, resizeOptions, outputFormat))
{
MemoryStream memoryStream = new MemoryStream();
memoryStream.Seek(0L, SeekOrigin.Begin);
ImageCodecInfo encoderInfo = this.FindEncoderInfo(outputFormat);
EncoderParameters encoderParams = new EncoderParameters(1);
encoderParams.Param[0] = new EncoderParameter(Encoder.Quality, (long)options.Quality);
resizedBitmap.Save((Stream)memoryStream, encoderInfo, encoderParams);
memoryStream.SetLength(memoryStream.Position);
memoryStream.Seek(0L, SeekOrigin.Begin);
return((Stream)memoryStream);
}
}
}
