Add an important comment.

Thanks to Hin-Tak Leung for the analysis.
12 years ago · d56e544d65
parent 6b9034f0fd
commit d56e544d65
1 changed files with 1 additions and 0 deletions
--- a/src/base/ftoutln.c
+++ b/src/base/ftoutln.c
@ -989,6 +989,7 @@

          l = FT_MIN( l_in, l_out );

+          /* non-strict inequality avoids divide-by-zero when q == l == 0 */
          if ( FT_MulFix( xstrength, q ) <= FT_MulFix( d, l ) )
            shift.x = FT_MulDiv( shift.x, xstrength, d );
          else