1 files changed, 145 insertions, 0 deletions
diff --git a/gfx/tests/gtest/TestMatrix.cpp b/gfx/tests/gtest/TestMatrix.cpp
new file mode 100644
index 0000000000..e55e8e793b
--- /dev/null
+++ b/gfx/tests/gtest/TestMatrix.cpp
@@ -0,0 +1,145 @@
+/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim: set ts=8 sts=2 et sw=2 tw=80: */
+/* 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 "mozilla/gfx/Matrix.h"
+
+using namespace mozilla;
+using namespace mozilla::gfx;
+
+TEST(Matrix, TransformAndClipRect)
+{
+  Rect c(100, 100, 100, 100);
+  Matrix4x4 m;
+  EXPECT_TRUE(m.TransformAndClipBounds(Rect(50, 50, 20, 20), c).IsEmpty());
+  EXPECT_TRUE(m.TransformAndClipBounds(Rect(250, 50, 20, 20), c).IsEmpty());
+  EXPECT_TRUE(m.TransformAndClipBounds(Rect(250, 250, 20, 20), c).IsEmpty());
+  EXPECT_TRUE(m.TransformAndClipBounds(Rect(50, 250, 20, 20), c).IsEmpty());
+
+  EXPECT_TRUE(m.TransformAndClipBounds(Rect(50, 50, 100, 20), c).IsEmpty());
+  EXPECT_TRUE(m.TransformAndClipBounds(Rect(150, 50, 100, 20), c).IsEmpty());
+  EXPECT_TRUE(m.TransformAndClipBounds(Rect(50, 250, 100, 20), c).IsEmpty());
+  EXPECT_TRUE(m.TransformAndClipBounds(Rect(150, 250, 100, 20), c).IsEmpty());
+
+  EXPECT_TRUE(m.TransformAndClipBounds(Rect(50, 50, 20, 100), c).IsEmpty());
+  EXPECT_TRUE(m.TransformAndClipBounds(Rect(50, 150, 20, 100), c).IsEmpty());
+  EXPECT_TRUE(m.TransformAndClipBounds(Rect(250, 50, 20, 100), c).IsEmpty());
+  EXPECT_TRUE(m.TransformAndClipBounds(Rect(250, 150, 20, 100), c).IsEmpty());
+
+  EXPECT_TRUE(m.TransformAndClipBounds(Rect(50, 50, 100, 100), c)
+                  .IsEqualInterior(Rect(100, 100, 50, 50)));
+  EXPECT_TRUE(m.TransformAndClipBounds(Rect(150, 50, 100, 100), c)
+                  .IsEqualInterior(Rect(150, 100, 50, 50)));
+  EXPECT_TRUE(m.TransformAndClipBounds(Rect(150, 150, 100, 100), c)
+                  .IsEqualInterior(Rect(150, 150, 50, 50)));
+  EXPECT_TRUE(m.TransformAndClipBounds(Rect(50, 150, 100, 100), c)
+                  .IsEqualInterior(Rect(100, 150, 50, 50)));
+
+  EXPECT_TRUE(m.TransformAndClipBounds(Rect(110, 110, 80, 80), c)
+                  .IsEqualInterior(Rect(110, 110, 80, 80)));
+
+  EXPECT_TRUE(m.TransformAndClipBounds(Rect(50, 50, 200, 200), c)
+                  .IsEqualInterior(Rect(100, 100, 100, 100)));
+
+  EXPECT_TRUE(m.TransformAndClipBounds(Rect(50, 50, 200, 100), c)
+                  .IsEqualInterior(Rect(100, 100, 100, 50)));
+  EXPECT_TRUE(m.TransformAndClipBounds(Rect(50, 150, 200, 100), c)
+                  .IsEqualInterior(Rect(100, 150, 100, 50)));
+  EXPECT_TRUE(m.TransformAndClipBounds(Rect(50, 50, 100, 200), c)
+                  .IsEqualInterior(Rect(100, 100, 50, 100)));
+  EXPECT_TRUE(m.TransformAndClipBounds(Rect(150, 50, 100, 200), c)
+                  .IsEqualInterior(Rect(150, 100, 50, 100)));
+
+  Matrix4x4 m2 = Matrix4x4::From2D(Matrix(22.68, 0, 0, 12, 16, 164));
+  EXPECT_TRUE(
+      m2.TransformAndClipBounds(Rect(0, 0, 100, 100), Rect(1024, 1024, 0, 0))
+          .IsEmpty());
+
+  // Empty rectangles should still have meaningful corners.
+  EXPECT_TRUE(m.TransformAndClipBounds(Rect(150, 50, 0, 200), c)
+                  .IsEqualEdges(Rect(150, 100, 0, 100)));
+  EXPECT_TRUE(m.TransformAndClipBounds(Rect(150, 150, 0, 0), c)
+                  .IsEqualEdges(Rect(150, 150, 0, 0)));
+  EXPECT_TRUE(m.TransformAndClipBounds(Rect(150, 100, 300, 0), c)
+                  .IsEqualEdges(Rect(150, 100, 50, 0)));
+}
+
+TEST(Matrix, RotateTransform)
+{
+  gfx::Matrix4x4 transformMatrix;
+  gfx::Point3D trans, scale;
+  gfx::Quaternion orient;
+
+  auto floor = [&](float aValue, int aDecimal) {
+    const int digit = pow(10, aDecimal);
+    const float result = (int)(aValue * digit);
+    return result / digit;
+  };
+
+  // Test rotate 45 degree on x-axis.
+  gfx::Quaternion expectedOrient(0.382f, 0.0f, 0.0f, 0.923f);
+  transformMatrix.RotateX(0.785f);
+  // the orient would be (x:0.3825, y:0, z:0, w: 0.9239)
+  transformMatrix.Decompose(trans, orient, scale);
+  EXPECT_EQ(floor(orient.x, 3), expectedOrient.x);
+  EXPECT_EQ(floor(orient.y, 3), expectedOrient.y);
+  EXPECT_EQ(floor(orient.z, 3), expectedOrient.z);
+  EXPECT_EQ(floor(orient.w, 3), expectedOrient.w);
+
+  // Test set rotate matrix from a quaternion and
+  // compare it with the result from decompose.
+  transformMatrix = gfx::Matrix4x4();
+  transformMatrix.SetRotationFromQuaternion(orient);
+  transformMatrix.Decompose(trans, orient, scale);
+  EXPECT_EQ(floor(orient.x, 3), expectedOrient.x);
+  EXPECT_EQ(floor(orient.y, 3), expectedOrient.y);
+  EXPECT_EQ(floor(orient.z, 3), expectedOrient.z);
+  EXPECT_EQ(floor(orient.w, 3), expectedOrient.w);
+
+  // Test rotate -45 degree on axis: (0.577f, 0.577f, 0.577f).
+  transformMatrix = gfx::Matrix4x4();
+  transformMatrix.SetRotateAxisAngle(0.577f, 0.577f, 0.577f, -0.785f);
+  // the orient would be (x:-0.2208, y:-0.2208, z:-0.2208, w: 0.9239)
+  transformMatrix.Decompose(trans, orient, scale);
+
+  expectedOrient.Set(-0.220f, -0.220f, -0.220f, 0.923f);
+  EXPECT_EQ(floor(orient.x, 3), expectedOrient.x);
+  EXPECT_EQ(floor(orient.y, 3), expectedOrient.y);
+  EXPECT_EQ(floor(orient.z, 3), expectedOrient.z);
+  EXPECT_EQ(floor(orient.w, 3), expectedOrient.w);
+
+  // Test set rotate matrix from a quaternion and
+  // compare it with the result from decompose.
+  transformMatrix = gfx::Matrix4x4();
+  transformMatrix.SetRotationFromQuaternion(orient);
+  transformMatrix.Decompose(trans, orient, scale);
+  EXPECT_EQ(floor(orient.x, 3), expectedOrient.x);
+  EXPECT_EQ(floor(orient.y, 3), expectedOrient.y);
+  EXPECT_EQ(floor(orient.z, 3), expectedOrient.z);
+  EXPECT_EQ(floor(orient.w, 3), expectedOrient.w);
+}
+
+TEST(Matrix4x4Flagged, Mult)
+{
+  Matrix4x4Flagged simple =
+      Matrix4x4::Translation(Point(42, 42)) * Matrix4x4::Scaling(3, 3, 1);
+  // For the general matrix, put a value in every field to make sure
+  // nothing gets dropped.
+  Matrix4x4 general(2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2);
+
+  // Use Matrix4x4::operator*(Matrix4x4).
+  // For the purposes of this test, assume that's correct.
+  Matrix4x4Flagged realResult = Matrix4x4Flagged(simple.GetMatrix() * general);
+
+  // Check that Matrix4x4Flagged::operator*(Matrix4x4Flagged) produces the same
+  // result.
+  Matrix4x4Flagged flaggedResult = simple * Matrix4x4Flagged(general);
+  EXPECT_EQ(realResult, flaggedResult);
+
+  // Check that Matrix4x4Flagged::operator*(Matrix4x4) produces the same result.
+  Matrix4x4Flagged mixedResult = simple * general;
+  EXPECT_EQ(realResult, mixedResult);
+}