🚀 go-pugleaf

In article <635@sys.uea.ac.uk> swc@sys.uea.ac.uk (S.W. Cox CMP Staff) 
writes:
> The RGB colour entries in Mac II's palettes are supposed to be 0 - 65535
> but when converted to the conventional range 0 .. 1  by:
> 
>         newcol.red := col.red/65535  etc
> 
> where newcol.red, green and blue are reals, it starts inserting negative
> numbers (possibly -32767 to 32767 or something similar).
> 
> Can anybody think of a suitable assignment for going from the integers
> to the reals (and vice versa) apart from adding and subtracting 32767 
etc.
> 
>         Thanks, S Cox UEA Norwich, UK

Paraphrase from Inside Mac V-175 (The Color Picker Package):

RGBcolor fields are of type INTEGER, which is signed. There is another 
16-bit type called SmallFract of range 0..65535 which is assignment-
compatible with INTEGERs. There are two conversion routines:
    FUNCTION SmallFract2Fix(s: SmallFract): Fixed;
    FUNCTION Fix2SmallFract(f: Fixed): SmallFract;

So perhaps this will work for you:
    newcol.red := SmallFract2Fix(col.red);
where newcol.red is of type Fixed rather than Real. I haven't tried this, 
but I will soon because I have a similar problem.

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