fixed a bug in the Conic bezier extrema computation formula..

25 years ago · ac83e7e09f
parent ada9503d22
commit ac83e7e09f
2 changed files with 7 additions and 1 deletions
--- a/6
+++ b/6
@ -1,3 +1,9 @@
+2000-11-29  David Turner  <david.turner@freetype.org>
+
+        * src/base/ftbbox.c (BBox_Conic_Check): fixed a really stupid
+	bug in the formula used to compute the conic bezier extrema
+	of non-monotonous arcs..
+
 2000-11-29  Werner Lemberg  <wl@gnu.org>

 	* src/base/ftcalc.c (FT_SqrtFixed), src/base/ftobjs.c
--- a/src/base/ftbbox.c
+++ b/src/base/ftbbox.c
@ -121,7 +121,7 @@
      }
    }

-    y1 = y3 = FT_MulDiv( y2 - y1, y2 - y1, y1 - 2*y2 + y3 );
+    y1 = y3 = y1 - FT_MulDiv( y2 - y1, y2 - y1, y1 - 2*y2 + y3 );

  Suite:
    if ( y1 < *min ) *min = y1;