Re: [ft] FT_Set_Char_Size vs. FT_Set_Pixel_Sizes

[Olumide]

On 17/11/2016 16:46, Werner LEMBERG wrote:
> > > I am using FreeType not to render to screen but just to rasterize a
> > > font for some esoteric purpose that I won't bother to describe.
> > > That said should I be using FT_Set_Char_Size or FT_Set_Pixel_Sizes?
>
> It doesn't matter.  Both work the same.
>
> > > As I am not rendering to screen, dpi does not matter in the
> > > slightest bit.
>
> Well, then use FT_Set_Pixel_Sizes.

Thanks for your reply.

I've only just started using FreeType so please excuse the level of 
ignorance that I'm about to display. (I _have_ read the tutorial even 
though my ignorance may suggest otherwise.)

I have used FT_Set_Pixel_Sizes( face , 32 , 32 ) -- because 32 by 32 is 
the maximum font dimension of a font in my application. Upon inspection 
of the resulting face->glyph I get a bitmap that's only about 25% of the 
size specified in FT_Set_Pixel_Sizes (Bitmap details: rows = top = 22, 
width = 13, left = 1). Of course I may have completely misunderstood 
what FT_Set_Pixel_Sizes does. Please do correct me where my thinking or 
understanding is incorrect.

Also, how is are the bitmap properties (rows, top and width) determined? 
Are they partly based on some meta data the TTF font file or are they 
_solely_ based on the user specified size?

Regards,

- Olumide