> Do you understand the Rx calculations?
Not without a lot of time to introduce myself to the code :-)
> They are wrong if integer overflows, aren't they?
Yes, it seems so, but up to now we haven't had a bug report.
> So there will be artifacts, possibly very small ones, when
> SMulDiv_NoRound becomes necessary. Aren't we overthinking here?
> Does Ftgrays avoid FT_MulDiv by splitting long lines?
It's probably a good idea to fix Rx also. What about this:
old:
Rx = ( ras.precision * Dx ) % Dy;
new:
Rx = ( ( ras.precision % Dy ) * ( Dx % Dy ) ) % Dy;
Werner
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