Centered flood fill style ink drop ripples on mouse/touch points.

ui/gfx/geometry/rect_unittest.cc

Index: ui/gfx/geometry/rect_unittest.cc
diff --git a/ui/gfx/geometry/rect_unittest.cc b/ui/gfx/geometry/rect_unittest.cc
index be4b462073671ccef217627f2c6977be5299ff08..78c3ead33f19f589bdadb17b7fd89dcc4f2e55d6 100644
--- a/ui/gfx/geometry/rect_unittest.cc
+++ b/ui/gfx/geometry/rect_unittest.cc
@@ -915,4 +915,26 @@ TEST(RectTest, ManhattanInternalDistance) {
       f.ManhattanInternalDistance(gfx::RectF(-1.5f, 0.0f, 1.5f, 1.0f)));
 }
 
+TEST(RectTest, MaxDistanceToCorners) {
+  const float kAbsError = 0.01f;
+  // Rect with the following corners in clockwise order starting at the origin:
+  // (10, 30), (60, 30), (10, 100), (60, 100)
+  const Rect rect(10, 30, 50, 70);
+
+  // Interior points
+  EXPECT_NEAR(78.10f, rect.MaxDistanceToCorners(gfx::Point(10, 40)), kAbsError);
+  EXPECT_NEAR(71.06f, rect.MaxDistanceToCorners(gfx::Point(55, 45)), kAbsError);
+  EXPECT_NEAR(64.03f, rect.MaxDistanceToCorners(gfx::Point(50, 80)), kAbsError);
+  EXPECT_NEAR(68.01f, rect.MaxDistanceToCorners(gfx::Point(20, 85)), kAbsError);
+
+  // Exterior points
+  EXPECT_NEAR(110.79f, rect.MaxDistanceToCorners(gfx::Point(3, 5)), kAbsError);
+  EXPECT_NEAR(108.17f, rect.MaxDistanceToCorners(gfx::Point(70, 10)),
+              kAbsError);
+  EXPECT_NEAR(103.08f, rect.MaxDistanceToCorners(gfx::Point(75, 110)),
+              kAbsError);
+  EXPECT_NEAR(101.24f, rect.MaxDistanceToCorners(gfx::Point(5, 115)),
+              kAbsError);
+}
+
 }  // namespace gfx