2004.11.18 18:05 "[Tiff] Using TIFFGetField to get a "Rational"", by Stephen Billard

I am new to LibTIFF. I want to get the ResolutionUnit, XResolution, and YResolution from a TIFF file. I have no problem getting the Resolution unit. (Although I did see a strange behavior. If I had not initialized the variable that receives the ResolutionUnit value before calling TIFFGetField, I did not get back the value. If I initialize the variable to 0, I get back the correct unit.)

I am having no luck with the X & Y Resolutions. I suspect that I don't know what kind of variable to receive the "Rational" result. I tried a Real and got garbage back. What should I be using? (I get no errors back from calling TIFFGetField.)

-Stephen
 www.sbillard.org/Stephen