Quelle est la bonne façon d'activer la protrusion de caractères dans xelatex?

Question

J'utilise XeTeX 3.1415926-2.2-0.9997.4 (partie de TeX Live 2010). Une de ses nouvelles caractéristiques est la protrusion de caractères, et j'aimerais l'utiliser dans mes documents. Le problème est que je ne peux pas le faire fonctionner.

XeTeX sample de xetex.tk wiki compile correctement et affiche les caractères en saillie. Bien que le fichier XeLaTeX que j'ai créé ne montre aucune saillie du tout.

Quelqu'un peut-il s'il vous plaît dire ce que je fais mal?

\documentclass[12pt]{book} 

\usepackage{xltxtra} 
\usepackage{polyglossia} 

\setmainfont[Mapping=tex-text]{Charis SIL} 
\setmainlanguage{english} 

\def\setprotcode#1{ 
    \rpcode#1 U"0021 55 
    \rpcode#1 U"002C 194 
    \rpcode#1 U"002D 233 
    \rpcode#1 U"002E 194 
    \rpcode#1 U"003B 138 
    \rpcode#1 U"003A 138 
    \rpcode#1 U"003F 94 
    \lpcode#1 U"2018 194 
    \rpcode#1 U"2019 194 
    \lpcode#1 U"201C 250 
    \rpcode#1 U"201D 250 
    \rpcode#1 U"2013 150 
    \rpcode#1 U"2014 200 
} 

\XeTeXprotrudechars=2 
\font\f = "Charis SIL:mapping=tex-text" 
\setprotcode{\f} 

\begin{document} 

In a genetic algorithm, a population of strings (called chromosomes or the 
genotype of the genome), which encode candidate solutions (called individuals, 
creatures, or phenotypes) to an optimization problem, evolves toward better solutions. 
Traditionally, solutions are represented in binary as strings of 0s and 1s, but other 
encodings are also possible. The evolution usually starts from a population of randomly 
generated individuals and happens in generations. In each generation, the fitness of 
every individual in the population is evaluated, multiple individuals are 
stochastically selected from the current population (based on their fitness), 
and modified (recombined and possibly randomly mutated) to form a new population. 
The new population is then used in the next iteration of the algorithm. Commonly, 
the algorithm terminates when either a maximum number of generations has been produced, 
or a satisfactory fitness level has been reached for the population. If the algorithm 
has terminated due to a maximum number of generations, a satisfactory solution may or 
may not have been reached. 

\end{document} 

Answer 1

Eh bien, ne tenez pas compte de cela, je suis stupide. J'ai oublié d'ajouter le fichier de style de microtype pour Charis, qui est référencé at the same wiki page.