bicubic interpolating zoom

[Adrian Page]

On Sunday 15 August 2004 9:45 pm, Michael Thaler wrote:
> I have a simple question: in the scaling code the function (or maybe it is
> a macro) qRound is used. Where is this function documented. I could not
> find it in the Qt documentation.

It doesn't seem to be documented anywhere, although it's used in one of the 
tutorials. It's a macro defined in qglobal.h.

> I need a function that always rounds down 
> a floating point number (a double) to an integer, e.g. 6.8->6. Is there a
> Qt function to do that? (I know there is a function like that in libm).

I don't think there's a Qt function for that. You can just cast the double to 
an int, assuming that for negative values you still want -6.8 to become -6. 
If you want -6.8 to become -7, you can use floor(), or just subtract 1 for 
negative input.

Adrian