[XeTeX] Font protrusion --- new or old ?

[Jonathan Kew]

On 7 Feb 2009, at 17:43, Rembrandt Wolpert wrote:

> Trying it out, and inserting
>
> \usepackage{microtype}
> \setmainfont{Garamond Premier Pro:+opbd}
>
> the result (linebreaks, hyphenated words) looks quite different from  
> a "straight" version without the package and the opbd.

Different, perhaps. Correct? I very much doubt it.

Does Garamond Premier Pro include an 'opbd' feature? The version I  
have doesn't support this. But even if it did, the result would still  
be wrong, because this feature shouldn't be applied to all the text  
but only at the line edges. Moreover, it requires a specialized engine  
that knows that it means to apply the 'lfbd' or 'rtbd' feature  
depending on position. There's no way this can have worked in XeTeX in  
the way the Adobe feature specification says, as the code hasn't been  
written.

As for the microtype package, didn't it give you a warning to say that  
it only works with pdftex?

Perhaps you were really just comparing Garamond with Computer Modern,  
perhaps?

JK