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May 2007
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2007.05.04 12:46 "Re: TIFFSetField and float values", by <mikk@go2.pl>
mikk napisał(a):
> Hello,
>
> I'm fighting with saving TIFFTAG_XRESOLUTION and TIFFTAG_YRESOLUTION
> into a TIFF file.
>
> AFAIK TIFFSetField is supposed to have 32 bit float as 3rd parameter
> and I pass such type of parameter to TIFFSetField [...]
Oh, my, I've found the reason. Digging into the source code I realized
that TIFFSetField
gets the parameter from va_arg as double:
(From tif_dir.c,v 1.72 2006/03/15 12:49:35, line 234:)
// ...
case TIFFTAG_XRESOLUTION:
td->td_xresolution = (float) va_arg(ap, double);
break;
// ...
When I pass argument of type double, the tag saves the value properly.
Looks like an error in documentation (TIFFSetField.3tiff.html)?
Kind regards,
mikk