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In my project i am making big changes on pixels of a bitmap and i want to add undo redo feature to this project.Sincesaving several bitmaps on VM’s memory is not a good idea i thought my only choice is storing history(bitmaps) as temp files.Before starting to implement i want to be sure i am doing something not stupid here.
Depends on the processing power and the length of undo history you want to maintain. If you can apply the transformations with reasonable speed then you can just keep a copy of a bitmap x operations back and in case of an undo just apply the last x-1 transformations to it.