Re: [ft] differing advances

[David Turner]

Hello Ryan,

the behvaiour you're seeing is perfectly normal.
The advance stored in a FT_Glyph image is a 16.16 number,
unlike the one returned by FT_Load_Glyph, which is 26.6

this is intentional, since it allows you to get a much
larger accuracy when FT_Glyph_Transform is called, since
this function also transforms the 16.16 advance vector.

see the FT_GlyphRec documentation:

http://www.freetype.org/freetype2/docs/reference/ft2-glyph_management.html#FT_GlyphRec
http://www.freetype.org/freetype2/docs/reference/ft2-glyph_management.html#FT_Glyph_Transform

Hope this helps,

- David Turner
- The FreeType Project  (www.freetype.org)


On Wed, 28 Feb 2007 09:36:11 -0600, "Ryan Underwood" <address@hidden> said:
> 
> On Wed, Feb 28, 2007 at 09:23:10AM -0600, Ryan Underwood wrote:
> > 
> > The contents of tmpglyph->advance and bg->root.advance differ.
> 
> Hmm, using a debugger, the actual problem I seem to be having is that
> FT_Get_Glyph does something I don't understand with the advance vector,
> (0x400 becomes 0x100000), and FT_Glyph_To_Bitmap is not updating the
> advance vector (it remains 0x100000).
> 
> -- 
> Ryan Underwood, <address@hidden>