关于TrueType字体的gasp技术说明

　　在JDK的TrueTyepFont类中，看到以下注释：

/*

      This is to obtain info from the TT 'gasp' (grid-fitting and       scan-conversion procedure) table which specifies three combinations:       Hint, Smooth (greyscale), Hint and Smooth.       In this simplified scheme we don't distinguish the latter two. We       hint even at small sizes, so as to preserve metrics consistency.       If the information isn't available default values are substituted.       The more precise defaults we'd do if we distinguished the cases are:

      Bold (no other style) fonts :       0-8 : Smooth ( do grey)       9+  : Hint + smooth (gridfit + grey)

      Plain, Italic and Bold-Italic fonts :       0-8 : Smooth ( do grey)       9-17 : Hint (gridfit)       18+  : Hint + smooth (gridfit + grey)

      The defaults should rarely come into play as most TT fonts provide       better defaults.       REMIND: consider unpacking the table into an array of booleans       for faster use.

*/

    @Override     public boolean useAAForPtSize(int ptsize) {  

　　具体意思我也没看得太明白。初步看与字体的bitmap模式无关。