[Lazarus] How to save screenshot to jpg and png format files

Bo Berglund bo.berglund at gmail.com
Thu Apr 29 17:49:43 CEST 2021

I have an application which can capture a regon of the desktop into an image.
It uses TBgraBitmap since it has a method for grabbing data from the screen.

So I can assign this to the clipboard and also save to a file:

  MyCapture : TBgraBitmap;
  Clip: TRect;
  Clip := Bounds(Self.Left, Self.Top, Self.Width, Self.Height);
  MyCapture := TBgraBitmap.Create();
  MyCapture.Bitmap.SaveToFile(ChangeFileExt(ParamStr(0), '.jpg'));

But the SaveToFile results in a file that is NOT a jpeg file at all...

How could I save it to a specific (known) format, like jpg or png?

Bo Berglund
Developer in Sweden

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