bug 108380, w3 svg conformance improvements

1 files changed, 8 insertions, 0 deletions

diff --git a/rsvg-path.c b/rsvg-path.c
index fe11b208..f1ef974f 100644
--- a/rsvg-path.c
+++ b/rsvg-path.c
@@ -115,6 +115,14 @@ rsvg_path_arc (RSVGParsePathCtx *ctx,
   double th0, th1, th_arc;
   int i, n_segs;
 
+  /* Check that neither radius is zero, since its isn't either
+     geometrically or mathematically meaningful and will
+     cause divide by zero and subsequent NaNs.  We should
+     really do some ranged check ie -0.001 < x < 000.1 rather
+     can just a straight check again zero.
+  */
+  if ((rx == 0.0) || (ry == 0.0)) return;
+
   sin_th = sin (x_axis_rotation * (M_PI / 180.0));
   cos_th = cos (x_axis_rotation * (M_PI / 180.0));
   a00 = cos_th / rx;