Re: [Freetype] weird glyph width/heights

[David Turner]

Hello HaB,

HaB JacKaL a écrit :
> 
> >
> My understanding, from reading the docs is that bitmap_top and bitmap_left
> give the height and width using cartesian coords, from the lower left corner
> of the glyph.
>

nope, the bitmap's dimensions are in glyph->bitmap.width and glyph->bitmap.rows
"glyph->bitmap_left" and "glyph->bitmap_top" correspond to the bitmap's bearings
and are necessary to correctly place the bitmap relative to the current pen
position.
 
The "FreeType Glyph Conventions" has more information on the subject..

> I think deciding how it's gonna fit on the screen is up to whatever program
> you are using to put in on the screen with.  Since I'm using openGL, I just
> need the width and height of the bitmap, and then I call glBitmap()
> accordingly.
> 
> So..I guess that Freetype's pixel values are relative only to the glyph
> itself.  Mapping to screen coords is up to you.
> 
Nope, there are a few rules to follow to correctly place the bitmaps within
a text run.. Have a look at the "ftview" program and see how it renders
a single line of text (in the "Render_Text" function) for an example..


Cheers,

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