Undraw something on bitmap

[agarwal]

If i draw something on a bitmap, can i erase it in anyway, except reload the bitmap?

 

[Iceplug]

Not if youve drawn it already. Drawings are not layered - they are actual changes to the pixels of the bitmap.

What I would do is have two bitmaps: one with the original picture, and one with the drawings (this one being subject to the graphics object). When you want to erase all of your drawings, simply draw the original image onto this new bitmap.