Re: [Freetype] A question so stupid . . .

[Tom Kacvinsky]

Yes, you are correct sir!  The answer is right.  An easier method, since you
decided to use doubles:

    result = (double) fixed / 65536.0 ;

Regards,

Tom

On Tue, 17 Apr 2001, Ian Pilcher wrote:

> . . . that no one seems to have ever asked it before!
>
> I'm trying to interpret some of the information in the PostScript table,
> specifically the italicAngle member.  I'm trying to convert the 16.16
> "fixed float" to a C double, and I can't get my results to match those
> produced by any of the TrueType->PostScript conversion utilities out
> there.  Of course, I don't really know that these utilities are doing
> it right, so could someone take a look at the following and tell me if
> I'm doing anything wrong?
>
> inline double Double_From_TT_Fixed(TT_Fixed fixed)
> {
>     short         mantissa;
>     unsigned short  fraction;
>     double        result;
>
>     mantissa = (short) ((fixed & 0xffff0000) / 65536);
>     fraction = (short) (fixed & 0x0000ffff);
>
>     result = ((double) mantissa) + ((double) fraction) / 65536.0;
>
>     return result;
> }
>
> When passed 0xffefaac1, for example, this function computes a
> mantissa = -17, fraction = 43713, and result = -16.332993.  Is this
> correct?
>
> Thanks!
>
>