Hi Peter,
this works, thanks a lot.
Thanks to Fernando!
However, as I could see by single stepping with the debugger, this seems to do much more than what I want, so I suspect it has efficiency issues. I will be doing this for pixels of images, so it better be as fast as possible.
It seems to do overflow checking, which I don't need (I know it won't overflow). How can I disable this? I tried silent_overflow_handler, but this seems still to do the checking.
Also I'm not sure if the rounding couldn't be more efficient (I only need to add 0.5, no need to be more elaborate). Is there a way to plug in my own rounding?
I experienced quite the same and solved it ... by adding 0,5 ;-) You may get some other problems with that but as a first step it works. Regards, Rainer