TImageEnIO.AsyncMode

Declaration

property AsyncMode: Boolean;

Description

Set to True to enable asynchronous input/output operations.

When asynchronous mode is enabled, each input/output method creates a new thread to executes the task then returns without waiting for the task to complete.

Note:
◼Applicable only when TImageEnIO is attached to a TIEBitmap object.
◼OnFinishWork will fire when an operation completes
◼To use just for loading images into TImageEnView, using AsyncLoading

Demo

Demos\InputOutput\Preload\Preload.dpr

Example

// Multi-threaded saving
Var
  bmp: TIEBitmap;
  io: TImageEnIO;
Begin
  bmp := TIEBitmap.Create;
  io  := TImageEnIO.CreateFromBitmap(bmp);
  try
    io.LoadFromFile('C:\input.bmp');
    io.AsyncMode := True;  // So it will create a thread for each input/output task
    io.SaveToFile('D:\i1.jpg');  // thread 1
    io.SaveToFile('D:\i2.jpg');  // thread 2
    io.SaveToFile('D:\i3.jpg');  // thread 3
  finally
    io.Free;  // Free method will wait for all tasks to end!
    bmp.Free;
  end;
End;

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