"I can't believe that this is so slow. I made some tests with RTLMoveMemory and it moves 720*576*4Bytes (my frame size) a thousand times in 14 milisecs."
Is that copying from video memory though? Copying from video memory is generally slow. I don't know if Windows buffers the screen in main memory or not, but I doubt they do.
Is that copying from video memory though? Copying from video memory is generally slow. I don't know if Windows buffers the screen in main memory or not, but I doubt they do.