1 files changed, 65 insertions, 0 deletions
diff --git a/chromium/cc/base/float_quad_unittest.cc b/chromium/cc/base/float_quad_unittest.cc
new file mode 100644
index 00000000000..bb3446c0d69
--- /dev/null
+++ b/chromium/cc/base/float_quad_unittest.cc
@@ -0,0 +1,65 @@
+// Copyright 2011 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#include "cc/base/math_util.h"
+#include "testing/gtest/include/gtest/gtest.h"
+#include "ui/gfx/quad_f.h"
+#include "ui/gfx/rect_f.h"
+#include "ui/gfx/transform.h"
+
+namespace cc {
+namespace {
+
+// TODO(danakj) Move this test to ui/gfx/ when we don't need MathUtil::MapQuad.
+TEST(FloatQuadTest, IsRectilinearTest) {
+  const int kNumRectilinear = 8;
+  gfx::Transform rectilinear_trans[kNumRectilinear];
+  rectilinear_trans[1].Rotate(90.0);
+  rectilinear_trans[2].Rotate(180.0);
+  rectilinear_trans[3].Rotate(270.0);
+  rectilinear_trans[4].SkewX(0.00000000001);
+  rectilinear_trans[5].SkewY(0.00000000001);
+  rectilinear_trans[6].Scale(0.00001, 0.00001);
+  rectilinear_trans[6].Rotate(180.0);
+  rectilinear_trans[7].Scale(100000, 100000);
+  rectilinear_trans[7].Rotate(180.0);
+
+  for (int i = 0; i < kNumRectilinear; ++i) {
+    bool clipped = false;
+    gfx::QuadF quad = MathUtil::MapQuad(
+        rectilinear_trans[i],
+        gfx::QuadF(
+            gfx::RectF(0.01010101f, 0.01010101f, 100.01010101f, 100.01010101f)),
+        &clipped);
+    ASSERT_TRUE(!clipped);
+    EXPECT_TRUE(quad.IsRectilinear());
+  }
+
+  const int kNumNonRectilinear = 10;
+  gfx::Transform non_rectilinear_trans[kNumNonRectilinear];
+  non_rectilinear_trans[0].Rotate(359.999);
+  non_rectilinear_trans[1].Rotate(0.0000001);
+  non_rectilinear_trans[2].Rotate(89.999999);
+  non_rectilinear_trans[3].Rotate(90.0000001);
+  non_rectilinear_trans[4].Rotate(179.999999);
+  non_rectilinear_trans[5].Rotate(180.0000001);
+  non_rectilinear_trans[6].Rotate(269.999999);
+  non_rectilinear_trans[7].Rotate(270.0000001);
+  non_rectilinear_trans[8].SkewX(0.00001);
+  non_rectilinear_trans[9].SkewY(0.00001);
+
+  for (int i = 0; i < kNumNonRectilinear; ++i) {
+    bool clipped = false;
+    gfx::QuadF quad = MathUtil::MapQuad(
+        non_rectilinear_trans[i],
+        gfx::QuadF(
+            gfx::RectF(0.01010101f, 0.01010101f, 100.01010101f, 100.01010101f)),
+        &clipped);
+    ASSERT_TRUE(!clipped);
+    EXPECT_FALSE(quad.IsRectilinear());
+  }
+}
+
+}  // namespace
+}  // namespace cc