1 files changed, 143 insertions, 0 deletions
diff --git a/gfx/tests/gtest/TestPolygon.cpp b/gfx/tests/gtest/TestPolygon.cpp
new file mode 100644
index 000000000..962722619
--- /dev/null
+++ b/gfx/tests/gtest/TestPolygon.cpp
@@ -0,0 +1,143 @@
+/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*-
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+#include "gtest/gtest.h"
+
+#include "PolygonTestUtils.h"
+
+#include "nsTArray.h"
+#include "Point.h"
+#include "Polygon.h"
+#include "Triangle.h"
+
+using namespace mozilla::gfx;
+
+TEST(Polygon3D, TriangulateRectangle)
+{
+  const Polygon3D p {
+    Point3D(0.0f, 0.0f, 1.0f),
+    Point3D(0.0f, 1.0f, 1.0f),
+    Point3D(1.0f, 1.0f, 1.0f),
+    Point3D(1.0f, 0.0f, 1.0f)
+  };
+
+  const nsTArray<Triangle> triangles = p.ToTriangles();
+  const nsTArray<Triangle> expected = {
+    Triangle(Point(0.0f, 0.0f), Point(0.0f, 1.0f), Point(1.0f, 1.0f)),
+    Triangle(Point(0.0f, 0.0f), Point(1.0f, 1.0f), Point(1.0f, 0.0f))
+  };
+
+  AssertArrayEQ(triangles, expected);
+}
+
+TEST(Polygon3D, TriangulatePentagon)
+{
+  const Polygon3D p {
+    Point3D(0.0f, 0.0f, 1.0f),
+    Point3D(0.0f, 1.0f, 1.0f),
+    Point3D(0.5f, 1.5f, 1.0f),
+    Point3D(1.0f, 1.0f, 1.0f),
+    Point3D(1.0f, 0.0f, 1.0f)
+  };
+
+  const nsTArray<Triangle> triangles = p.ToTriangles();
+  const nsTArray<Triangle> expected = {
+    Triangle(Point(0.0f, 0.0f), Point(0.0f, 1.0f), Point(0.5f, 1.5f)),
+    Triangle(Point(0.0f, 0.0f), Point(0.5f, 1.5f), Point(1.0f, 1.0f)),
+    Triangle(Point(0.0f, 0.0f), Point(1.0f, 1.0f), Point(1.0f, 0.0f))
+  };
+
+  AssertArrayEQ(triangles, expected);
+}
+
+TEST(Polygon3D, ClipRectangle)
+{
+  Polygon3D clipped, expected;
+
+  Polygon3D polygon {
+    Point3D(0.0f, 0.0f, 0.0f),
+    Point3D(0.0f, 1.0f, 0.0f),
+    Point3D(1.0f, 1.0f, 0.0f),
+    Point3D(1.0f, 0.0f, 0.0f)
+  };
+
+  clipped = polygon.ClipPolygon(Rect(0.0f, 0.0f, 1.0f, 1.0f));
+  EXPECT_TRUE(clipped == polygon);
+
+
+  clipped = polygon.ClipPolygon(Rect(0.0f, 0.0f, 0.8f, 0.8f));
+  expected = Polygon3D {
+    Point3D(0.0f, 0.0f, 0.0f),
+    Point3D(0.0f, 0.8f, 0.0f),
+    Point3D(0.8f, 0.8f, 0.0f),
+    Point3D(0.8f, 0.0f, 0.0f)
+  };
+  EXPECT_TRUE(clipped == expected);
+
+
+  clipped = polygon.ClipPolygon(Rect(0.2f, 0.2f, 0.8f, 0.8f));
+  expected = Polygon3D {
+    Point3D(0.2f, 0.2f, 0.0f),
+    Point3D(0.2f, 1.0f, 0.0f),
+    Point3D(1.0f, 1.0f, 0.0f),
+    Point3D(1.0f, 0.2f, 0.0f)
+  };
+  EXPECT_TRUE(clipped == expected);
+
+
+  clipped = polygon.ClipPolygon(Rect(0.2f, 0.2f, 0.6f, 0.6f));
+  expected = Polygon3D {
+    Point3D(0.2f, 0.2f, 0.0f),
+    Point3D(0.2f, 0.8f, 0.0f),
+    Point3D(0.8f, 0.8f, 0.0f),
+    Point3D(0.8f, 0.2f, 0.0f)
+  };
+  EXPECT_TRUE(clipped == expected);
+}
+
+TEST(Polygon3D, ClipTriangle)
+{
+  Polygon3D clipped, expected;
+  const Polygon3D polygon {
+    Point3D(0.0f, 0.0f, 0.0f),
+    Point3D(0.0f, 1.0f, 0.0f),
+    Point3D(1.0f, 1.0f, 0.0f)
+  };
+
+  clipped = polygon.ClipPolygon(Rect(0.0f, 0.0f, 1.0f, 1.0f));
+  expected = Polygon3D {
+    Point3D(0.0f, 0.0f, 0.0f),
+    Point3D(0.0f, 1.0f, 0.0f),
+    Point3D(1.0f, 1.0f, 0.0f)
+  };
+  EXPECT_TRUE(clipped == expected);
+
+
+  clipped = polygon.ClipPolygon(Rect(0.0f, 0.0f, 0.8f, 0.8f));
+  expected = Polygon3D {
+    Point3D(0.0f, 0.0f, 0.0f),
+    Point3D(0.0f, 0.8f, 0.0f),
+    Point3D(0.8f, 0.8f, 0.0f)
+  };
+  EXPECT_TRUE(clipped == expected);
+
+
+  clipped = polygon.ClipPolygon(Rect(0.2f, 0.2f, 0.8f, 0.8f));
+  expected = Polygon3D {
+    Point3D(0.2f, 0.2f, 0.0f),
+    Point3D(0.2f, 1.0f, 0.0f),
+    Point3D(1.0f, 1.0f, 0.0f)
+  };
+  EXPECT_TRUE(clipped == expected);
+
+
+  clipped = polygon.ClipPolygon(Rect(0.2f, 0.2f, 0.6f, 0.6f));
+  expected = Polygon3D {
+    Point3D(0.2f, 0.2f, 0.0f),
+    Point3D(0.2f, 0.8f, 0.0f),
+    Point3D(0.8f, 0.8f, 0.0f)
+  };
+  EXPECT_TRUE(clipped == expected);
+}