Re: [ft] Scaline for rasterizer?

[Aya Koshigaya]

Hi,

okay.. so if I am right, to draw a line at a Y = 100, i'd give the  
rasterizer the value "100 << 6".. right?
But as soon as I want a line at 100.453, I have to do some  
calculations to get the "453" speratated etc.. so, is there any easy  
to use FT-funktion for converting a float to the fixed float value?

Thanks,
Aya


On 08.09.2009, at 11:21, Mickey Gabel wrote:

> Aya Koshigaya wrote:
> > Mhh ... okay, thanks :)
> > But how do I convert my value to a 26.6 float? And how do I store  
> > it in the rasterizer, since FT_POS is declared as "signed long"..  
> > not float..?
> > Thanks,
> > Aya
>
> Fixed-point arithmetic is not very complicated to understand. It's  
> mostly regular integer math with a fixed scaling.
> You can start here: http://en.wikipedia.org/wiki/Fixed- 
> point_arithmetic
>
> FT2 has some very nice functions for using fixed-point. See http://www.freetype.org/freetype2/docs/reference/ft2-computations.html 
>  .
>
>
>
>
>
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