If the filename paramter haven't the extension of the jpeg file (.jpg), the /drawsave command this jpeg quality compression save the window in Bitmap (bmp)
/drawsave -q50 @test bla.jpg
(bla.jpg is valid jpeg file, small size)
/drawsave -q50 @test bla.tmp
(bla.tmp is invalid jpeg file, is valid bmp file, enormous size)
