/// <summary>
/// Post processes the image asynchronously.
/// </summary>
/// <param name="stream">The source image stream.</param>
/// <param name="extension">The image extension.</param>
/// <returns>
/// The <see cref="Task"/>.
/// </returns>
public static async Task <MemoryStream> PostProcessImageAsync(MemoryStream stream, string extension)
{
// Create a source temporary file with the correct extension.
long length = stream.Length;
string tempFile = Path.GetTempFileName();
string sourceFile = Path.ChangeExtension(tempFile, extension);
File.Move(tempFile, sourceFile);
// Save the input stream to a temp file for post processing.
using (FileStream fileStream = File.Create(sourceFile))
{
await stream.CopyToAsync(fileStream);
}
PostProcessingResultEventArgs result = await RunProcess(sourceFile, length);
if (result != null && result.Saving > 0)
{
using (FileStream fileStream = File.OpenRead(sourceFile))
{
// Replace stream contents.
stream.SetLength(0);
await fileStream.CopyToAsync(stream);
}
}
// Cleanup
File.Delete(sourceFile);
stream.Position = 0;
return(stream);
}
/// <summary>
/// Post processes the image asynchronously.
/// </summary>
/// <param name="sourceFile">
/// The source file.
/// </param>
/// <returns>
/// The <see cref="Task"/>.
/// </returns>
public static async Task PostProcessImageAsync(string sourceFile)
{
string targetFile = Path.GetTempFileName();
PostProcessingResultEventArgs result = await RunProcess(sourceFile, targetFile);
if (result != null && result.Saving > 0 && result.ResultFileSize > 0)
{
File.Copy(result.ResultFileName, result.OriginalFileName, true);
File.Delete(result.ResultFileName);
}
else
{
File.Delete(targetFile);
}
}
