2013/1/23 Werner LEMBERG <[email protected]>
>
> Folks,
>
>
> just a heads-up which might influence applications: I've just fixed a
> bug in the TrueType handler to correctly compute the `height' value of
> the `FT_Face' structure. Up to now, the following was done:
>
> ascender_int = round(ascender_26.6);
> descender_int = round(descender_26.6);
> height_int = round(height_26.6);
>
> This has been replaced with
>
> ascender_int = round(ascender_26.6);
> descender_int = round(descender_26.6);
> height_int = ascender_int - descender_int;
>
>
This seems to assume that height_26.6 was always ascender_26.6 + -
descender_26.6. I'm not sure this is always true. IIRC, there are fonts
where the line height is actually different from ascender - descender, they
would be affected by this patch in surprising ways.
Unless I'm missing something (which is entirely possible, and I've not
looked at the patch details yet).
If that so, maybe add some code to deal with this, e.g.:
if (height_26.6 == ascender_26.6 - descender_26.6) {
height_int = ascender_int - descender_int;
} else {
// something else, to be defined :-)
}
> to be in sync with Windows.
>
> I wonder whether we should do the same for non-TrueType fonts. I think
> yes, but please comment!
>
>
> Werner
>
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