fix tangent circles

1 files changed, 9 insertions, 3 deletions

diff --git a/pixman/pixman-radial-gradient.c b/pixman/pixman-radial-gradient.c
index d6f5a45..a2d1c5d 100644
--- a/pixman/pixman-radial-gradient.c
+++ b/pixman/pixman-radial-gradient.c
@@ -97,9 +97,15 @@ radial_compute_color (double                    a,
 
     if (a == 0)
     {
-	_pixman_gradient_walker_pixel (walker,
-				       1. / 2 * c / b,
-				       buffer);
+	if (b != 0) {
+	    double t = 1. / 2 * c / b;
+
+	    if (t * dr * pixman_fixed_1 > mindr) {
+		_pixman_gradient_walker_pixel (walker, t, buffer);
+		return;
+	    }
+	}
+	memset (buffer, 0, sizeof (pixman_component_t) * walker->num_components);
 	return;
     }