title: firemonkey drawings on bitmap without BeginScene and EndScene
body: <p>I am developing an application that should be drawing vector based like graphics.  I am drawing a lot of lines (more than 50 000) on the image.  After playing around and doing some research it seems like the bottleneck is caused by the Image.Beginscene and Image.Endscene - <a href="https://stackoverflow.com/questions/8988131/fastest-way-to-draw-pixels-in-firemonkey">Fastest way to draw pixels in FireMonkey</a>.  Is there any way to draw lines without the BeginScene and EndScene?</p>