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-rw-r--r--chromium/ui/gfx/geometry/quad_unittest.cc359
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diff --git a/chromium/ui/gfx/geometry/quad_unittest.cc b/chromium/ui/gfx/geometry/quad_unittest.cc
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+++ b/chromium/ui/gfx/geometry/quad_unittest.cc
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+// Copyright (c) 2012 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 "base/basictypes.h"
+#include "testing/gtest/include/gtest/gtest.h"
+#include "ui/gfx/geometry/quad_f.h"
+#include "ui/gfx/geometry/rect_f.h"
+
+namespace gfx {
+
+TEST(QuadTest, Construction) {
+ // Verify constructors.
+ PointF a(1, 1);
+ PointF b(2, 1);
+ PointF c(2, 2);
+ PointF d(1, 2);
+ PointF e;
+ QuadF q1;
+ QuadF q2(e, e, e, e);
+ QuadF q3(a, b, c, d);
+ QuadF q4(BoundingRect(a, c));
+ EXPECT_EQ(q1.ToString(), q2.ToString());
+ EXPECT_EQ(q3.ToString(), q4.ToString());
+
+ // Verify getters.
+ EXPECT_EQ(q3.p1().ToString(), a.ToString());
+ EXPECT_EQ(q3.p2().ToString(), b.ToString());
+ EXPECT_EQ(q3.p3().ToString(), c.ToString());
+ EXPECT_EQ(q3.p4().ToString(), d.ToString());
+
+ // Verify setters.
+ q3.set_p1(b);
+ q3.set_p2(c);
+ q3.set_p3(d);
+ q3.set_p4(a);
+ EXPECT_EQ(q3.p1().ToString(), b.ToString());
+ EXPECT_EQ(q3.p2().ToString(), c.ToString());
+ EXPECT_EQ(q3.p3().ToString(), d.ToString());
+ EXPECT_EQ(q3.p4().ToString(), a.ToString());
+
+ // Verify operator=(Rect)
+ EXPECT_NE(q1.ToString(), q4.ToString());
+ q1 = BoundingRect(a, c);
+ EXPECT_EQ(q1.ToString(), q4.ToString());
+
+ // Verify operator=(Quad)
+ EXPECT_NE(q1.ToString(), q3.ToString());
+ q1 = q3;
+ EXPECT_EQ(q1.ToString(), q3.ToString());
+}
+
+TEST(QuadTest, AddingVectors) {
+ PointF a(1, 1);
+ PointF b(2, 1);
+ PointF c(2, 2);
+ PointF d(1, 2);
+ Vector2dF v(3.5f, -2.5f);
+
+ QuadF q1(a, b, c, d);
+ QuadF added = q1 + v;
+ q1 += v;
+ QuadF expected1(PointF(4.5f, -1.5f),
+ PointF(5.5f, -1.5f),
+ PointF(5.5f, -0.5f),
+ PointF(4.5f, -0.5f));
+ EXPECT_EQ(expected1.ToString(), added.ToString());
+ EXPECT_EQ(expected1.ToString(), q1.ToString());
+
+ QuadF q2(a, b, c, d);
+ QuadF subtracted = q2 - v;
+ q2 -= v;
+ QuadF expected2(PointF(-2.5f, 3.5f),
+ PointF(-1.5f, 3.5f),
+ PointF(-1.5f, 4.5f),
+ PointF(-2.5f, 4.5f));
+ EXPECT_EQ(expected2.ToString(), subtracted.ToString());
+ EXPECT_EQ(expected2.ToString(), q2.ToString());
+
+ QuadF q3(a, b, c, d);
+ q3 += v;
+ q3 -= v;
+ EXPECT_EQ(QuadF(a, b, c, d).ToString(), q3.ToString());
+ EXPECT_EQ(q3.ToString(), (q3 + v - v).ToString());
+}
+
+TEST(QuadTest, IsRectilinear) {
+ PointF a(1, 1);
+ PointF b(2, 1);
+ PointF c(2, 2);
+ PointF d(1, 2);
+ Vector2dF v(3.5f, -2.5f);
+
+ EXPECT_TRUE(QuadF().IsRectilinear());
+ EXPECT_TRUE(QuadF(a, b, c, d).IsRectilinear());
+ EXPECT_TRUE((QuadF(a, b, c, d) + v).IsRectilinear());
+
+ float epsilon = std::numeric_limits<float>::epsilon();
+ PointF a2(1 + epsilon / 2, 1 + epsilon / 2);
+ PointF b2(2 + epsilon / 2, 1 + epsilon / 2);
+ PointF c2(2 + epsilon / 2, 2 + epsilon / 2);
+ PointF d2(1 + epsilon / 2, 2 + epsilon / 2);
+ EXPECT_TRUE(QuadF(a2, b, c, d).IsRectilinear());
+ EXPECT_TRUE((QuadF(a2, b, c, d) + v).IsRectilinear());
+ EXPECT_TRUE(QuadF(a, b2, c, d).IsRectilinear());
+ EXPECT_TRUE((QuadF(a, b2, c, d) + v).IsRectilinear());
+ EXPECT_TRUE(QuadF(a, b, c2, d).IsRectilinear());
+ EXPECT_TRUE((QuadF(a, b, c2, d) + v).IsRectilinear());
+ EXPECT_TRUE(QuadF(a, b, c, d2).IsRectilinear());
+ EXPECT_TRUE((QuadF(a, b, c, d2) + v).IsRectilinear());
+
+ struct {
+ PointF a_off, b_off, c_off, d_off;
+ } tests[] = {
+ {
+ PointF(1, 1.00001f),
+ PointF(2, 1.00001f),
+ PointF(2, 2.00001f),
+ PointF(1, 2.00001f)
+ },
+ {
+ PointF(1.00001f, 1),
+ PointF(2.00001f, 1),
+ PointF(2.00001f, 2),
+ PointF(1.00001f, 2)
+ },
+ {
+ PointF(1.00001f, 1.00001f),
+ PointF(2.00001f, 1.00001f),
+ PointF(2.00001f, 2.00001f),
+ PointF(1.00001f, 2.00001f)
+ },
+ {
+ PointF(1, 0.99999f),
+ PointF(2, 0.99999f),
+ PointF(2, 1.99999f),
+ PointF(1, 1.99999f)
+ },
+ {
+ PointF(0.99999f, 1),
+ PointF(1.99999f, 1),
+ PointF(1.99999f, 2),
+ PointF(0.99999f, 2)
+ },
+ {
+ PointF(0.99999f, 0.99999f),
+ PointF(1.99999f, 0.99999f),
+ PointF(1.99999f, 1.99999f),
+ PointF(0.99999f, 1.99999f)
+ }
+ };
+
+ for (size_t i = 0; i < ARRAYSIZE_UNSAFE(tests); ++i) {
+ PointF a_off = tests[i].a_off;
+ PointF b_off = tests[i].b_off;
+ PointF c_off = tests[i].c_off;
+ PointF d_off = tests[i].d_off;
+
+ EXPECT_FALSE(QuadF(a_off, b, c, d).IsRectilinear());
+ EXPECT_FALSE((QuadF(a_off, b, c, d) + v).IsRectilinear());
+ EXPECT_FALSE(QuadF(a, b_off, c, d).IsRectilinear());
+ EXPECT_FALSE((QuadF(a, b_off, c, d) + v).IsRectilinear());
+ EXPECT_FALSE(QuadF(a, b, c_off, d).IsRectilinear());
+ EXPECT_FALSE((QuadF(a, b, c_off, d) + v).IsRectilinear());
+ EXPECT_FALSE(QuadF(a, b, c, d_off).IsRectilinear());
+ EXPECT_FALSE((QuadF(a, b, c, d_off) + v).IsRectilinear());
+ EXPECT_FALSE(QuadF(a_off, b, c_off, d).IsRectilinear());
+ EXPECT_FALSE((QuadF(a_off, b, c_off, d) + v).IsRectilinear());
+ EXPECT_FALSE(QuadF(a, b_off, c, d_off).IsRectilinear());
+ EXPECT_FALSE((QuadF(a, b_off, c, d_off) + v).IsRectilinear());
+ EXPECT_FALSE(QuadF(a, b_off, c_off, d_off).IsRectilinear());
+ EXPECT_FALSE((QuadF(a, b_off, c_off, d_off) + v).IsRectilinear());
+ EXPECT_FALSE(QuadF(a_off, b, c_off, d_off).IsRectilinear());
+ EXPECT_FALSE((QuadF(a_off, b, c_off, d_off) + v).IsRectilinear());
+ EXPECT_FALSE(QuadF(a_off, b_off, c, d_off).IsRectilinear());
+ EXPECT_FALSE((QuadF(a_off, b_off, c, d_off) + v).IsRectilinear());
+ EXPECT_FALSE(QuadF(a_off, b_off, c_off, d).IsRectilinear());
+ EXPECT_FALSE((QuadF(a_off, b_off, c_off, d) + v).IsRectilinear());
+ EXPECT_TRUE(QuadF(a_off, b_off, c_off, d_off).IsRectilinear());
+ EXPECT_TRUE((QuadF(a_off, b_off, c_off, d_off) + v).IsRectilinear());
+ }
+}
+
+TEST(QuadTest, IsCounterClockwise) {
+ PointF a1(1, 1);
+ PointF b1(2, 1);
+ PointF c1(2, 2);
+ PointF d1(1, 2);
+ EXPECT_FALSE(QuadF(a1, b1, c1, d1).IsCounterClockwise());
+ EXPECT_FALSE(QuadF(b1, c1, d1, a1).IsCounterClockwise());
+ EXPECT_TRUE(QuadF(a1, d1, c1, b1).IsCounterClockwise());
+ EXPECT_TRUE(QuadF(c1, b1, a1, d1).IsCounterClockwise());
+
+ // Slightly more complicated quads should work just as easily.
+ PointF a2(1.3f, 1.4f);
+ PointF b2(-0.7f, 4.9f);
+ PointF c2(1.8f, 6.2f);
+ PointF d2(2.1f, 1.6f);
+ EXPECT_TRUE(QuadF(a2, b2, c2, d2).IsCounterClockwise());
+ EXPECT_TRUE(QuadF(b2, c2, d2, a2).IsCounterClockwise());
+ EXPECT_FALSE(QuadF(a2, d2, c2, b2).IsCounterClockwise());
+ EXPECT_FALSE(QuadF(c2, b2, a2, d2).IsCounterClockwise());
+
+ // Quads with 3 collinear points should work correctly, too.
+ PointF a3(0, 0);
+ PointF b3(1, 0);
+ PointF c3(2, 0);
+ PointF d3(1, 1);
+ EXPECT_FALSE(QuadF(a3, b3, c3, d3).IsCounterClockwise());
+ EXPECT_FALSE(QuadF(b3, c3, d3, a3).IsCounterClockwise());
+ EXPECT_TRUE(QuadF(a3, d3, c3, b3).IsCounterClockwise());
+ // The next expectation in particular would fail for an implementation
+ // that incorrectly uses only a cross product of the first 3 vertices.
+ EXPECT_TRUE(QuadF(c3, b3, a3, d3).IsCounterClockwise());
+
+ // Non-convex quads should work correctly, too.
+ PointF a4(0, 0);
+ PointF b4(1, 1);
+ PointF c4(2, 0);
+ PointF d4(1, 3);
+ EXPECT_FALSE(QuadF(a4, b4, c4, d4).IsCounterClockwise());
+ EXPECT_FALSE(QuadF(b4, c4, d4, a4).IsCounterClockwise());
+ EXPECT_TRUE(QuadF(a4, d4, c4, b4).IsCounterClockwise());
+ EXPECT_TRUE(QuadF(c4, b4, a4, d4).IsCounterClockwise());
+
+ // A quad with huge coordinates should not fail this check due to
+ // single-precision overflow.
+ PointF a5(1e30f, 1e30f);
+ PointF b5(1e35f, 1e30f);
+ PointF c5(1e35f, 1e35f);
+ PointF d5(1e30f, 1e35f);
+ EXPECT_FALSE(QuadF(a5, b5, c5, d5).IsCounterClockwise());
+ EXPECT_FALSE(QuadF(b5, c5, d5, a5).IsCounterClockwise());
+ EXPECT_TRUE(QuadF(a5, d5, c5, b5).IsCounterClockwise());
+ EXPECT_TRUE(QuadF(c5, b5, a5, d5).IsCounterClockwise());
+}
+
+TEST(QuadTest, BoundingBox) {
+ RectF r(3.2f, 5.4f, 7.007f, 12.01f);
+ EXPECT_EQ(r.ToString(), QuadF(r).BoundingBox().ToString());
+
+ PointF a(1.3f, 1.4f);
+ PointF b(-0.7f, 4.9f);
+ PointF c(1.8f, 6.2f);
+ PointF d(2.1f, 1.6f);
+ float left = -0.7f;
+ float top = 1.4f;
+ float right = 2.1f;
+ float bottom = 6.2f;
+ EXPECT_EQ(RectF(left, top, right - left, bottom - top).ToString(),
+ QuadF(a, b, c, d).BoundingBox().ToString());
+}
+
+TEST(QuadTest, ContainsPoint) {
+ PointF a(1.3f, 1.4f);
+ PointF b(-0.8f, 4.4f);
+ PointF c(1.8f, 6.1f);
+ PointF d(2.1f, 1.6f);
+
+ Vector2dF epsilon_x(2 * std::numeric_limits<float>::epsilon(), 0);
+ Vector2dF epsilon_y(0, 2 * std::numeric_limits<float>::epsilon());
+
+ Vector2dF ac_center = c - a;
+ ac_center.Scale(0.5f);
+ Vector2dF bd_center = d - b;
+ bd_center.Scale(0.5f);
+
+ EXPECT_TRUE(QuadF(a, b, c, d).Contains(a + ac_center));
+ EXPECT_TRUE(QuadF(a, b, c, d).Contains(b + bd_center));
+ EXPECT_TRUE(QuadF(a, b, c, d).Contains(c - ac_center));
+ EXPECT_TRUE(QuadF(a, b, c, d).Contains(d - bd_center));
+ EXPECT_FALSE(QuadF(a, b, c, d).Contains(a - ac_center));
+ EXPECT_FALSE(QuadF(a, b, c, d).Contains(b - bd_center));
+ EXPECT_FALSE(QuadF(a, b, c, d).Contains(c + ac_center));
+ EXPECT_FALSE(QuadF(a, b, c, d).Contains(d + bd_center));
+
+ EXPECT_TRUE(QuadF(a, b, c, d).Contains(a));
+ EXPECT_FALSE(QuadF(a, b, c, d).Contains(a - epsilon_x));
+ EXPECT_FALSE(QuadF(a, b, c, d).Contains(a - epsilon_y));
+ EXPECT_FALSE(QuadF(a, b, c, d).Contains(a + epsilon_x));
+ EXPECT_TRUE(QuadF(a, b, c, d).Contains(a + epsilon_y));
+
+ EXPECT_TRUE(QuadF(a, b, c, d).Contains(b));
+ EXPECT_FALSE(QuadF(a, b, c, d).Contains(b - epsilon_x));
+ EXPECT_FALSE(QuadF(a, b, c, d).Contains(b - epsilon_y));
+ EXPECT_TRUE(QuadF(a, b, c, d).Contains(b + epsilon_x));
+ EXPECT_FALSE(QuadF(a, b, c, d).Contains(b + epsilon_y));
+
+ EXPECT_TRUE(QuadF(a, b, c, d).Contains(c));
+ EXPECT_FALSE(QuadF(a, b, c, d).Contains(c - epsilon_x));
+ EXPECT_TRUE(QuadF(a, b, c, d).Contains(c - epsilon_y));
+ EXPECT_FALSE(QuadF(a, b, c, d).Contains(c + epsilon_x));
+ EXPECT_FALSE(QuadF(a, b, c, d).Contains(c + epsilon_y));
+
+ EXPECT_TRUE(QuadF(a, b, c, d).Contains(d));
+ EXPECT_TRUE(QuadF(a, b, c, d).Contains(d - epsilon_x));
+ EXPECT_FALSE(QuadF(a, b, c, d).Contains(d - epsilon_y));
+ EXPECT_FALSE(QuadF(a, b, c, d).Contains(d + epsilon_x));
+ EXPECT_FALSE(QuadF(a, b, c, d).Contains(d + epsilon_y));
+
+ // Test a simple square.
+ PointF s1(-1, -1);
+ PointF s2(1, -1);
+ PointF s3(1, 1);
+ PointF s4(-1, 1);
+ // Top edge.
+ EXPECT_FALSE(QuadF(s1, s2, s3, s4).Contains(PointF(-1.1f, -1.0f)));
+ EXPECT_TRUE(QuadF(s1, s2, s3, s4).Contains(PointF(-1.0f, -1.0f)));
+ EXPECT_TRUE(QuadF(s1, s2, s3, s4).Contains(PointF(0.0f, -1.0f)));
+ EXPECT_TRUE(QuadF(s1, s2, s3, s4).Contains(PointF(1.0f, -1.0f)));
+ EXPECT_FALSE(QuadF(s1, s2, s3, s4).Contains(PointF(1.1f, -1.0f)));
+ // Bottom edge.
+ EXPECT_FALSE(QuadF(s1, s2, s3, s4).Contains(PointF(-1.1f, 1.0f)));
+ EXPECT_TRUE(QuadF(s1, s2, s3, s4).Contains(PointF(-1.0f, 1.0f)));
+ EXPECT_TRUE(QuadF(s1, s2, s3, s4).Contains(PointF(0.0f, 1.0f)));
+ EXPECT_TRUE(QuadF(s1, s2, s3, s4).Contains(PointF(1.0f, 1.0f)));
+ EXPECT_FALSE(QuadF(s1, s2, s3, s4).Contains(PointF(1.1f, 1.0f)));
+ // Left edge.
+ EXPECT_FALSE(QuadF(s1, s2, s3, s4).Contains(PointF(-1.0f, -1.1f)));
+ EXPECT_TRUE(QuadF(s1, s2, s3, s4).Contains(PointF(-1.0f, -1.0f)));
+ EXPECT_TRUE(QuadF(s1, s2, s3, s4).Contains(PointF(-1.0f, 0.0f)));
+ EXPECT_TRUE(QuadF(s1, s2, s3, s4).Contains(PointF(-1.0f, 1.0f)));
+ EXPECT_FALSE(QuadF(s1, s2, s3, s4).Contains(PointF(-1.0f, 1.1f)));
+ // Right edge.
+ EXPECT_FALSE(QuadF(s1, s2, s3, s4).Contains(PointF(1.0f, -1.1f)));
+ EXPECT_TRUE(QuadF(s1, s2, s3, s4).Contains(PointF(1.0f, -1.0f)));
+ EXPECT_TRUE(QuadF(s1, s2, s3, s4).Contains(PointF(1.0f, 0.0f)));
+ EXPECT_TRUE(QuadF(s1, s2, s3, s4).Contains(PointF(1.0f, 1.0f)));
+ EXPECT_FALSE(QuadF(s1, s2, s3, s4).Contains(PointF(1.0f, 1.1f)));
+ // Centered inside.
+ EXPECT_TRUE(QuadF(s1, s2, s3, s4).Contains(PointF(0, 0)));
+ // Centered outside.
+ EXPECT_FALSE(QuadF(s1, s2, s3, s4).Contains(PointF(-1.1f, 0)));
+ EXPECT_FALSE(QuadF(s1, s2, s3, s4).Contains(PointF(1.1f, 0)));
+ EXPECT_FALSE(QuadF(s1, s2, s3, s4).Contains(PointF(0, -1.1f)));
+ EXPECT_FALSE(QuadF(s1, s2, s3, s4).Contains(PointF(0, 1.1f)));
+}
+
+TEST(QuadTest, Scale) {
+ PointF a(1.3f, 1.4f);
+ PointF b(-0.8f, 4.4f);
+ PointF c(1.8f, 6.1f);
+ PointF d(2.1f, 1.6f);
+ QuadF q1(a, b, c, d);
+ q1.Scale(1.5f);
+
+ PointF a_scaled = ScalePoint(a, 1.5f);
+ PointF b_scaled = ScalePoint(b, 1.5f);
+ PointF c_scaled = ScalePoint(c, 1.5f);
+ PointF d_scaled = ScalePoint(d, 1.5f);
+ EXPECT_EQ(q1.ToString(),
+ QuadF(a_scaled, b_scaled, c_scaled, d_scaled).ToString());
+
+ QuadF q2;
+ q2.Scale(1.5f);
+ EXPECT_EQ(q2.ToString(), q2.ToString());
+}
+
+} // namespace gfx
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