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November 2004
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2004.11.18 20:16 "Re: Using TIFFGetField to get a "Rational"", by Eric Vergnaud
> > When I remember right, you get to values, and must interpret them as
> > divident/divisor
>
> That is certainly true on the TIFF tag value level. However, if I remember
> correctly, LibTiff does that already, and returns the value as a Float. That
> seems backed up by the link I mentioned in my other mail in this thread.
>
> Perhaps someone with a normal LibTiff compilation could doublecheck. I'm
> getting
> good results in LibTiffDelphi passing a pointer to a pascal Single, and I do
> think that the C equivalent of that is Float, but it would nice if someone
> doublechecked.
Yes, here it is:
case TIFFTAG_XRESOLUTION:
*va_arg(ap, float*) = td->td_xresolution;
break;
case TIFFTAG_YRESOLUTION:
*va_arg(ap, float*) = td->td_yresolution;
break;
So you should pass a float* to TIFFGetField.
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