Re: [ft] font size error

[Dave Calkins]

Thanks for the reply!  So for this case, I need to use 96 instead of 72 
for the resolution.  Where do I input that value?  Also, say the user 
chooses an arbitrary font family and point size.  Is there some check I 
can do to see which I should be using?  Or should I just always be using 
96 on Windows?


On 1/18/2010 5:25 PM, Werner LEMBERG wrote:
> > For this particular combination of font family and point size,
> > though, the sizing of the font fails with an error
> > FNT_Err_Invalid_Pixel_Size.  We're requesting "MS Sans Serif" with a
> > point size of 8.  We've also tried a couple other sizes for this
> > same font family with no luck.
> >
> > Any ideas?  Is the problem that its a ".fon" file?
> >      
> I don't see a problem, because...
>
>    
> > 5) This eventually calls FT_Set_Char_Size(face =<ptr>,char_width =
> > 0,char_height = 512,horz_resolution = 0,vert_resolution = 0).  This
> > function ends up setting the char_width and char_height to both be
> > 512 and both resolutions to be 72.  It then calls FT_Request_Size.
> >
> > [...]
> >
> > It looks like its failing a check concerning which sizes are
> > available in the font.  I am able, though, to use an 8pt MS Sans
> > Serif font in, say, WordPad.
> >      
> you are using the wrong resolution.  Windows uses 96dpi by default,
> and 8pt at 96dpi is available in `sserife.fon'.
>
> Note that in FreeType the various sizes available in `sserife.fon' are
> not handled as bitmap strikes of a single face but have to be accessed
> with different font indices.
>
>
>      Werner
>
>
>