// Copyright 2014 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/simple_enclosed_region.h"
#include <algorithm>
#include <vector>
#include "base/logging.h"
#include "cc/base/region.h"
#include "testing/gtest/include/gtest/gtest.h"
namespace cc {
namespace {
bool ExpectRegionEq(const gfx::Rect& rect, const SimpleEnclosedRegion& region) {
std::vector<gfx::Rect> actual_rects;
std::vector<gfx::Rect> expected_rects;
if (!rect.IsEmpty())
expected_rects.push_back(rect);
for (size_t i = 0; i < region.GetRegionComplexity(); ++i)
actual_rects.push_back(region.GetRect(i));
if (rect.IsEmpty() != region.IsEmpty()) {
LOG(ERROR) << "Expected: " << rect.IsEmpty()
<< " Actual: " << region.IsEmpty();
return false;
}
if (expected_rects.size() != actual_rects.size()) {
LOG(ERROR) << "Expected: " << expected_rects.size()
<< " Actual: " << actual_rects.size();
return false;
}
std::sort(actual_rects.begin(), actual_rects.end());
std::sort(expected_rects.begin(), expected_rects.end());
for (size_t i = 0; i < expected_rects.size(); ++i) {
if (expected_rects[i] != actual_rects[i]) {
LOG(ERROR) << "Expected: " << expected_rects[i].ToString()
<< " Actual: " << actual_rects[i].ToString();
return false;
}
}
return true;
}
TEST(SimpleEnclosedRegionTest, Create) {
SimpleEnclosedRegion r1;
EXPECT_TRUE(r1.IsEmpty());
EXPECT_TRUE(ExpectRegionEq(gfx::Rect(), r1));
SimpleEnclosedRegion r2(gfx::Rect(2, 3, 4, 5));
EXPECT_TRUE(ExpectRegionEq(gfx::Rect(2, 3, 4, 5), r2));
SimpleEnclosedRegion r3(2, 3, 4, 5);
EXPECT_TRUE(ExpectRegionEq(gfx::Rect(2, 3, 4, 5), r3));
SimpleEnclosedRegion r4(4, 5);
EXPECT_TRUE(ExpectRegionEq(gfx::Rect(4, 5), r4));
SimpleEnclosedRegion r5(Region(gfx::Rect(2, 3, 4, 5)));
EXPECT_TRUE(ExpectRegionEq(gfx::Rect(2, 3, 4, 5), r5));
SimpleEnclosedRegion r6(r5);
EXPECT_TRUE(ExpectRegionEq(gfx::Rect(2, 3, 4, 5), r6));
}
TEST(SimpleEnclosedRegionTest, Assign) {
SimpleEnclosedRegion r;
EXPECT_TRUE(r.IsEmpty());
r = gfx::Rect(2, 3, 4, 5);
EXPECT_TRUE(ExpectRegionEq(gfx::Rect(2, 3, 4, 5), r));
r = SimpleEnclosedRegion(3, 4, 5, 6);
EXPECT_TRUE(ExpectRegionEq(gfx::Rect(3, 4, 5, 6), r));
}
TEST(SimpleEnclosedRegionTest, Clear) {
SimpleEnclosedRegion r(1, 2, 3, 4);
EXPECT_FALSE(r.IsEmpty());
r.Clear();
EXPECT_TRUE(r.IsEmpty());
}
TEST(SimpleEnclosedRegionTest, GetRegionComplexity) {
SimpleEnclosedRegion empty;
EXPECT_EQ(0u, empty.GetRegionComplexity());
SimpleEnclosedRegion stuff;
stuff.Union(gfx::Rect(1, 2, 3, 4));
EXPECT_EQ(1u, stuff.GetRegionComplexity());
// The SimpleEnclosedRegion only holds up to 1 rect.
stuff.Union(gfx::Rect(5, 6, 7, 8));
EXPECT_EQ(1u, stuff.GetRegionComplexity());
}
TEST(SimpleEnclosedRegionTest, Contains) {
SimpleEnclosedRegion r(1, 2, 5, 6);
EXPECT_FALSE(r.Contains(gfx::Point(0, 2)));
EXPECT_FALSE(r.Contains(gfx::Point(1, 1)));
EXPECT_TRUE(r.Contains(gfx::Point(1, 2)));
EXPECT_FALSE(r.Contains(gfx::Point(6, 2)));
EXPECT_FALSE(r.Contains(gfx::Point(5, 1)));
EXPECT_TRUE(r.Contains(gfx::Point(5, 2)));
EXPECT_FALSE(r.Contains(gfx::Point(0, 7)));
EXPECT_FALSE(r.Contains(gfx::Point(1, 8)));
EXPECT_TRUE(r.Contains(gfx::Point(1, 7)));
EXPECT_FALSE(r.Contains(gfx::Point(6, 7)));
EXPECT_FALSE(r.Contains(gfx::Point(5, 8)));
EXPECT_TRUE(r.Contains(gfx::Point(5, 7)));
EXPECT_FALSE(r.Contains(gfx::Rect(0, 2, 1, 1)));
EXPECT_FALSE(r.Contains(gfx::Rect(1, 1, 1, 1)));
EXPECT_TRUE(r.Contains(gfx::Rect(1, 2, 1, 1)));
EXPECT_FALSE(r.Contains(gfx::Rect(0, 1, 2, 2)));
EXPECT_FALSE(r.Contains(gfx::Rect(6, 2, 1, 1)));
EXPECT_FALSE(r.Contains(gfx::Rect(5, 1, 1, 1)));
EXPECT_TRUE(r.Contains(gfx::Rect(5, 2, 1, 1)));
EXPECT_FALSE(r.Contains(gfx::Rect(5, 1, 2, 2)));
EXPECT_FALSE(r.Contains(gfx::Rect(0, 7, 1, 1)));
EXPECT_FALSE(r.Contains(gfx::Rect(1, 8, 1, 1)));
EXPECT_TRUE(r.Contains(gfx::Rect(1, 7, 1, 1)));
EXPECT_FALSE(r.Contains(gfx::Rect(0, 7, 2, 2)));
EXPECT_FALSE(r.Contains(gfx::Rect(6, 7, 1, 1)));
EXPECT_FALSE(r.Contains(gfx::Rect(5, 8, 1, 1)));
EXPECT_TRUE(r.Contains(gfx::Rect(5, 7, 1, 1)));
EXPECT_FALSE(r.Contains(gfx::Rect(5, 7, 2, 2)));
gfx::Rect q(1, 2, 5, 6);
EXPECT_TRUE(r.Contains(q)) << q.ToString();
q.Inset(-1, 0, 0, 0);
EXPECT_FALSE(r.Contains(q)) << q.ToString();
q.Inset(1, -1, 0, 0);
EXPECT_FALSE(r.Contains(q)) << q.ToString();
q.Inset(0, 1, -1, 0);
EXPECT_FALSE(r.Contains(q)) << q.ToString();
q.Inset(0, 0, 1, -1);
EXPECT_FALSE(r.Contains(q)) << q.ToString();
q.Inset(1, 0, 0, 1);
EXPECT_TRUE(r.Contains(q)) << q.ToString();
q.Inset(-1, 1, 0, 0);
EXPECT_TRUE(r.Contains(q)) << q.ToString();
q.Inset(0, -1, 1, 0);
EXPECT_TRUE(r.Contains(q)) << q.ToString();
q.Inset(0, 0, -1, 1);
EXPECT_TRUE(r.Contains(q)) << q.ToString();
EXPECT_FALSE(r.Contains(SimpleEnclosedRegion(0, 2, 1, 1)));
EXPECT_FALSE(r.Contains(SimpleEnclosedRegion(1, 1, 1, 1)));
EXPECT_TRUE(r.Contains(SimpleEnclosedRegion(1, 2, 1, 1)));
EXPECT_FALSE(r.Contains(SimpleEnclosedRegion(0, 1, 2, 2)));
EXPECT_FALSE(r.Contains(SimpleEnclosedRegion(6, 2, 1, 1)));
EXPECT_FALSE(r.Contains(SimpleEnclosedRegion(5, 1, 1, 1)));
EXPECT_TRUE(r.Contains(SimpleEnclosedRegion(5, 2, 1, 1)));
EXPECT_FALSE(r.Contains(SimpleEnclosedRegion(5, 1, 2, 2)));
EXPECT_FALSE(r.Contains(SimpleEnclosedRegion(0, 7, 1, 1)));
EXPECT_FALSE(r.Contains(SimpleEnclosedRegion(1, 8, 1, 1)));
EXPECT_TRUE(r.Contains(SimpleEnclosedRegion(1, 7, 1, 1)));
EXPECT_FALSE(r.Contains(SimpleEnclosedRegion(0, 7, 2, 2)));
EXPECT_FALSE(r.Contains(SimpleEnclosedRegion(6, 7, 1, 1)));
EXPECT_FALSE(r.Contains(SimpleEnclosedRegion(5, 8, 1, 1)));
EXPECT_TRUE(r.Contains(SimpleEnclosedRegion(5, 7, 1, 1)));
EXPECT_FALSE(r.Contains(SimpleEnclosedRegion(5, 7, 2, 2)));
q = gfx::Rect(1, 2, 5, 6);
EXPECT_TRUE(r.Contains(SimpleEnclosedRegion(q))) << q.ToString();
q.Inset(-1, 0, 0, 0);
EXPECT_FALSE(r.Contains(SimpleEnclosedRegion(q))) << q.ToString();
q.Inset(1, -1, 0, 0);
EXPECT_FALSE(r.Contains(SimpleEnclosedRegion(q))) << q.ToString();
q.Inset(0, 1, -1, 0);
EXPECT_FALSE(r.Contains(SimpleEnclosedRegion(q))) << q.ToString();
q.Inset(0, 0, 1, -1);
EXPECT_FALSE(r.Contains(SimpleEnclosedRegion(q))) << q.ToString();
q.Inset(1, 0, 0, 1);
EXPECT_TRUE(r.Contains(SimpleEnclosedRegion(q))) << q.ToString();
q.Inset(-1, 1, 0, 0);
EXPECT_TRUE(r.Contains(SimpleEnclosedRegion(q))) << q.ToString();
q.Inset(0, -1, 1, 0);
EXPECT_TRUE(r.Contains(SimpleEnclosedRegion(q))) << q.ToString();
q.Inset(0, 0, -1, 1);
EXPECT_TRUE(r.Contains(SimpleEnclosedRegion(q))) << q.ToString();
}
TEST(SimpleEnclosedRegionTest, Intersects) {
SimpleEnclosedRegion r(1, 2, 5, 6);
EXPECT_FALSE(r.Intersects(gfx::Rect(0, 2, 1, 1)));
EXPECT_FALSE(r.Intersects(gfx::Rect(1, 1, 1, 1)));
EXPECT_TRUE(r.Intersects(gfx::Rect(1, 2, 1, 1)));
EXPECT_TRUE(r.Intersects(gfx::Rect(0, 1, 2, 2)));
EXPECT_FALSE(r.Intersects(gfx::Rect(6, 2, 1, 1)));
EXPECT_FALSE(r.Intersects(gfx::Rect(5, 1, 1, 1)));
EXPECT_TRUE(r.Intersects(gfx::Rect(5, 2, 1, 1)));
EXPECT_TRUE(r.Intersects(gfx::Rect(5, 1, 2, 2)));
EXPECT_FALSE(r.Intersects(gfx::Rect(0, 7, 1, 1)));
EXPECT_FALSE(r.Intersects(gfx::Rect(1, 8, 1, 1)));
EXPECT_TRUE(r.Intersects(gfx::Rect(1, 7, 1, 1)));
EXPECT_TRUE(r.Intersects(gfx::Rect(0, 7, 2, 2)));
EXPECT_FALSE(r.Intersects(gfx::Rect(6, 7, 1, 1)));
EXPECT_FALSE(r.Intersects(gfx::Rect(5, 8, 1, 1)));
EXPECT_TRUE(r.Intersects(gfx::Rect(5, 7, 1, 1)));
EXPECT_TRUE(r.Intersects(gfx::Rect(5, 7, 2, 2)));
gfx::Rect q(1, 2, 5, 6);
EXPECT_TRUE(r.Intersects(q)) << q.ToString();
q.Inset(-1, 0, 0, 0);
EXPECT_TRUE(r.Intersects(q)) << q.ToString();
q.Inset(1, -1, 0, 0);
EXPECT_TRUE(r.Intersects(q)) << q.ToString();
q.Inset(0, 1, -1, 0);
EXPECT_TRUE(r.Intersects(q)) << q.ToString();
q.Inset(0, 0, 1, -1);
EXPECT_TRUE(r.Intersects(q)) << q.ToString();
q.Inset(1, 0, 0, 1);
EXPECT_TRUE(r.Intersects(q)) << q.ToString();
q.Inset(-1, 1, 0, 0);
EXPECT_TRUE(r.Intersects(q)) << q.ToString();
q.Inset(0, -1, 1, 0);
EXPECT_TRUE(r.Intersects(q)) << q.ToString();
q.Inset(0, 0, -1, 1);
EXPECT_TRUE(r.Intersects(q)) << q.ToString();
EXPECT_FALSE(r.Intersects(SimpleEnclosedRegion(0, 2, 1, 1)));
EXPECT_FALSE(r.Intersects(SimpleEnclosedRegion(1, 1, 1, 1)));
EXPECT_TRUE(r.Intersects(SimpleEnclosedRegion(1, 2, 1, 1)));
EXPECT_TRUE(r.Intersects(SimpleEnclosedRegion(0, 1, 2, 2)));
EXPECT_FALSE(r.Intersects(SimpleEnclosedRegion(6, 2, 1, 1)));
EXPECT_FALSE(r.Intersects(SimpleEnclosedRegion(5, 1, 1, 1)));
EXPECT_TRUE(r.Intersects(SimpleEnclosedRegion(5, 2, 1, 1)));
EXPECT_TRUE(r.Intersects(SimpleEnclosedRegion(5, 1, 2, 2)));
EXPECT_FALSE(r.Intersects(SimpleEnclosedRegion(0, 7, 1, 1)));
EXPECT_FALSE(r.Intersects(SimpleEnclosedRegion(1, 8, 1, 1)));
EXPECT_TRUE(r.Intersects(SimpleEnclosedRegion(1, 7, 1, 1)));
EXPECT_TRUE(r.Intersects(SimpleEnclosedRegion(0, 7, 2, 2)));
EXPECT_FALSE(r.Intersects(SimpleEnclosedRegion(6, 7, 1, 1)));
EXPECT_FALSE(r.Intersects(SimpleEnclosedRegion(5, 8, 1, 1)));
EXPECT_TRUE(r.Intersects(SimpleEnclosedRegion(5, 7, 1, 1)));
EXPECT_TRUE(r.Intersects(SimpleEnclosedRegion(5, 7, 2, 2)));
q = gfx::Rect(1, 2, 5, 6);
EXPECT_TRUE(r.Intersects(SimpleEnclosedRegion(q))) << q.ToString();
q.Inset(-1, 0, 0, 0);
EXPECT_TRUE(r.Intersects(SimpleEnclosedRegion(q))) << q.ToString();
q.Inset(1, -1, 0, 0);
EXPECT_TRUE(r.Intersects(SimpleEnclosedRegion(q))) << q.ToString();
q.Inset(0, 1, -1, 0);
EXPECT_TRUE(r.Intersects(SimpleEnclosedRegion(q))) << q.ToString();
q.Inset(0, 0, 1, -1);
EXPECT_TRUE(r.Intersects(SimpleEnclosedRegion(q))) << q.ToString();
q.Inset(1, 0, 0, 1);
EXPECT_TRUE(r.Intersects(SimpleEnclosedRegion(q))) << q.ToString();
q.Inset(-1, 1, 0, 0);
EXPECT_TRUE(r.Intersects(SimpleEnclosedRegion(q))) << q.ToString();
q.Inset(0, -1, 1, 0);
EXPECT_TRUE(r.Intersects(SimpleEnclosedRegion(q))) << q.ToString();
q.Inset(0, 0, -1, 1);
EXPECT_TRUE(r.Intersects(SimpleEnclosedRegion(q))) << q.ToString();
}
TEST(SimpleEnclosedRegionTest, Equals) {
SimpleEnclosedRegion r(1, 2, 3, 4);
EXPECT_TRUE(r.Equals(SimpleEnclosedRegion(1, 2, 3, 4)));
EXPECT_FALSE(r.Equals(SimpleEnclosedRegion(2, 2, 3, 4)));
EXPECT_FALSE(r.Equals(SimpleEnclosedRegion(1, 3, 3, 4)));
EXPECT_FALSE(r.Equals(SimpleEnclosedRegion(1, 2, 4, 4)));
EXPECT_FALSE(r.Equals(SimpleEnclosedRegion(1, 2, 3, 5)));
EXPECT_FALSE(r.Equals(SimpleEnclosedRegion(2, 2, 2, 4)));
EXPECT_FALSE(r.Equals(SimpleEnclosedRegion(1, 3, 3, 3)));
}
TEST(SimpleEnclosedRegionTest, Bounds) {
SimpleEnclosedRegion r;
EXPECT_EQ(gfx::Rect(), r.bounds());
r = gfx::Rect(3, 4, 5, 6);
EXPECT_EQ(gfx::Rect(3, 4, 5, 6), r.bounds());
r.Union(gfx::Rect(1, 2, 12, 13));
EXPECT_EQ(gfx::Rect(1, 2, 12, 13), r.bounds());
}
TEST(SimpleEnclosedRegionTest, GetRect) {
SimpleEnclosedRegion r(3, 4, 5, 6);
EXPECT_EQ(gfx::Rect(3, 4, 5, 6), r.GetRect(0));
r.Union(gfx::Rect(1, 2, 12, 13));
EXPECT_EQ(gfx::Rect(1, 2, 12, 13), r.GetRect(0));
}
TEST(SimpleEnclosedRegionTest, Union) {
SimpleEnclosedRegion r;
EXPECT_TRUE(ExpectRegionEq(gfx::Rect(), r));
// Empty Union anything = anything.
r.Union(gfx::Rect(4, 5, 6, 7));
EXPECT_TRUE(ExpectRegionEq(gfx::Rect(4, 5, 6, 7), r));
// Anything Union empty = anything.
r.Union(gfx::Rect());
EXPECT_TRUE(ExpectRegionEq(gfx::Rect(4, 5, 6, 7), r));
// Anything Union contained rect = Anything.
r.Union(gfx::Rect(5, 6, 4, 5));
EXPECT_TRUE(ExpectRegionEq(gfx::Rect(4, 5, 6, 7), r));
// Anything Union containing rect = containing rect.
r.Union(gfx::Rect(2, 3, 8, 9));
EXPECT_TRUE(ExpectRegionEq(gfx::Rect(2, 3, 8, 9), r));
r.Union(gfx::Rect(2, 3, 9, 10));
EXPECT_TRUE(ExpectRegionEq(gfx::Rect(2, 3, 9, 10), r));
// Union with a smaller disjoint rect is ignored.
r.Union(gfx::Rect(20, 21, 9, 9));
EXPECT_TRUE(ExpectRegionEq(gfx::Rect(2, 3, 9, 10), r));
// Union with a smaller overlapping rect is ignored.
r.Union(gfx::Rect(3, 4, 9, 9));
EXPECT_TRUE(ExpectRegionEq(gfx::Rect(2, 3, 9, 10), r));
// Union with an equal sized rect can be either one.
r.Union(gfx::Rect(4, 4, 9, 10));
EXPECT_EQ(1u, r.GetRegionComplexity());
EXPECT_TRUE(r.bounds() == gfx::Rect(2, 3, 9, 10) ||
r.bounds() == gfx::Rect(4, 4, 9, 10));
// Union with a larger disjoint rect is taken.
r.Union(gfx::Rect(20, 21, 12, 13));
EXPECT_TRUE(ExpectRegionEq(gfx::Rect(20, 21, 12, 13), r));
// Union with a larger overlapping rect is taken.
r.Union(gfx::Rect(19, 19, 12, 14));
EXPECT_TRUE(ExpectRegionEq(gfx::Rect(19, 19, 12, 14), r));
// True also when the rect covers one edge of the existing region.
r = gfx::Rect(10, 10, 10, 10);
r.Union(gfx::Rect(12, 7, 9, 16));
EXPECT_TRUE(ExpectRegionEq(gfx::Rect(12, 7, 9, 16), r));
r = gfx::Rect(10, 10, 10, 10);
r.Union(gfx::Rect(9, 7, 9, 16));
EXPECT_TRUE(ExpectRegionEq(gfx::Rect(9, 7, 9, 16), r));
r = gfx::Rect(10, 10, 10, 10);
r.Union(gfx::Rect(7, 12, 16, 9));
EXPECT_TRUE(ExpectRegionEq(gfx::Rect(7, 12, 16, 9), r));
r = gfx::Rect(10, 10, 10, 10);
r.Union(gfx::Rect(7, 9, 16, 9));
EXPECT_TRUE(ExpectRegionEq(gfx::Rect(7, 9, 16, 9), r));
// But if the existing region can be expanded to make a larger rect, then it
// will. Union area is 9*12 = 108. By merging, we make a rect with an area of
// 10*11 = 110. The resulting rect is expanded as far as possible while
// remaining enclosed in the Union.
r = gfx::Rect(10, 10, 10, 10);
r.Union(gfx::Rect(12, 9, 9, 12));
EXPECT_TRUE(ExpectRegionEq(gfx::Rect(10, 10, 11, 10), r));
r = gfx::Rect(10, 10, 10, 10);
r.Union(gfx::Rect(9, 9, 9, 12));
EXPECT_TRUE(ExpectRegionEq(gfx::Rect(9, 10, 11, 10), r));
r = gfx::Rect(10, 10, 10, 10);
r.Union(gfx::Rect(9, 12, 12, 9));
EXPECT_TRUE(ExpectRegionEq(gfx::Rect(10, 10, 10, 11), r));
r = gfx::Rect(10, 10, 10, 10);
r.Union(gfx::Rect(9, 9, 12, 9));
EXPECT_TRUE(ExpectRegionEq(gfx::Rect(10, 9, 10, 11), r));
r = gfx::Rect(12, 9, 9, 12);
r.Union(gfx::Rect(10, 10, 10, 10));
EXPECT_TRUE(ExpectRegionEq(gfx::Rect(10, 10, 11, 10), r));
r = gfx::Rect(9, 9, 9, 12);
r.Union(gfx::Rect(10, 10, 10, 10));
EXPECT_TRUE(ExpectRegionEq(gfx::Rect(9, 10, 11, 10), r));
r = gfx::Rect(9, 12, 12, 9);
r.Union(gfx::Rect(10, 10, 10, 10));
EXPECT_TRUE(ExpectRegionEq(gfx::Rect(10, 10, 10, 11), r));
r = gfx::Rect(9, 9, 12, 9);
r.Union(gfx::Rect(10, 10, 10, 10));
EXPECT_TRUE(ExpectRegionEq(gfx::Rect(10, 9, 10, 11), r));
}
TEST(SimpleEnclosedRegionTest, Subtract) {
SimpleEnclosedRegion r;
EXPECT_TRUE(ExpectRegionEq(gfx::Rect(), r));
// Empty Subtract anything = empty.
r.Subtract(gfx::Rect(4, 5, 6, 7));
EXPECT_TRUE(ExpectRegionEq(gfx::Rect(), r));
// Subtracting an enclosing rect = empty.
r = gfx::Rect(10, 10, 10, 10);
r.Subtract(gfx::Rect(10, 10, 10, 10));
EXPECT_TRUE(ExpectRegionEq(gfx::Rect(), r));
r = gfx::Rect(10, 10, 10, 10);
r.Subtract(gfx::Rect(9, 9, 12, 12));
EXPECT_TRUE(ExpectRegionEq(gfx::Rect(), r));
// Subtracting a rect that covers one side of the region will shrink that
// side.
r = gfx::Rect(10, 10, 10, 10);
r.Subtract(gfx::Rect(18, 10, 10, 10));
EXPECT_TRUE(ExpectRegionEq(gfx::Rect(10, 10, 8, 10), r));
r = gfx::Rect(10, 10, 10, 10);
r.Subtract(gfx::Rect(18, 8, 10, 14));
EXPECT_TRUE(ExpectRegionEq(gfx::Rect(10, 10, 8, 10), r));
r = gfx::Rect(10, 10, 10, 10);
r.Subtract(gfx::Rect(10, 18, 10, 10));
EXPECT_TRUE(ExpectRegionEq(gfx::Rect(10, 10, 10, 8), r));
r = gfx::Rect(10, 10, 10, 10);
r.Subtract(gfx::Rect(8, 18, 14, 10));
EXPECT_TRUE(ExpectRegionEq(gfx::Rect(10, 10, 10, 8), r));
r = gfx::Rect(10, 10, 10, 10);
r.Subtract(gfx::Rect(2, 10, 10, 10));
EXPECT_TRUE(ExpectRegionEq(gfx::Rect(12, 10, 8, 10), r));
r = gfx::Rect(10, 10, 10, 10);
r.Subtract(gfx::Rect(2, 8, 10, 14));
EXPECT_TRUE(ExpectRegionEq(gfx::Rect(12, 10, 8, 10), r));
r = gfx::Rect(10, 10, 10, 10);
r.Subtract(gfx::Rect(10, 2, 10, 10));
EXPECT_TRUE(ExpectRegionEq(gfx::Rect(10, 12, 10, 8), r));
r = gfx::Rect(10, 10, 10, 10);
r.Subtract(gfx::Rect(8, 2, 14, 10));
EXPECT_TRUE(ExpectRegionEq(gfx::Rect(10, 12, 10, 8), r));
// Subtracting a rect that does not cover a full side will still shrink that
// side.
r = gfx::Rect(10, 10, 10, 10);
r.Subtract(gfx::Rect(18, 12, 10, 8));
EXPECT_TRUE(ExpectRegionEq(gfx::Rect(10, 10, 8, 10), r));
r = gfx::Rect(10, 10, 10, 10);
r.Subtract(gfx::Rect(18, 12, 10, 10));
EXPECT_TRUE(ExpectRegionEq(gfx::Rect(10, 10, 8, 10), r));
r = gfx::Rect(10, 10, 10, 10);
r.Subtract(gfx::Rect(12, 18, 8, 10));
EXPECT_TRUE(ExpectRegionEq(gfx::Rect(10, 10, 10, 8), r));
r = gfx::Rect(10, 10, 10, 10);
r.Subtract(gfx::Rect(12, 18, 10, 10));
EXPECT_TRUE(ExpectRegionEq(gfx::Rect(10, 10, 10, 8), r));
r = gfx::Rect(10, 10, 10, 10);
r.Subtract(gfx::Rect(2, 12, 10, 8));
EXPECT_TRUE(ExpectRegionEq(gfx::Rect(12, 10, 8, 10), r));
r = gfx::Rect(10, 10, 10, 10);
r.Subtract(gfx::Rect(2, 12, 10, 10));
EXPECT_TRUE(ExpectRegionEq(gfx::Rect(12, 10, 8, 10), r));
r = gfx::Rect(10, 10, 10, 10);
r.Subtract(gfx::Rect(12, 2, 8, 10));
EXPECT_TRUE(ExpectRegionEq(gfx::Rect(10, 12, 10, 8), r));
r = gfx::Rect(10, 10, 10, 10);
r.Subtract(gfx::Rect(12, 2, 10, 10));
EXPECT_TRUE(ExpectRegionEq(gfx::Rect(10, 12, 10, 8), r));
// Subtracting a rect inside the region will make it choose the larger result.
r = gfx::Rect(10, 10, 10, 10);
r.Subtract(gfx::Rect(11, 11, 7, 8));
EXPECT_TRUE(ExpectRegionEq(gfx::Rect(18, 10, 2, 10), r));
r = gfx::Rect(10, 10, 10, 10);
r.Subtract(gfx::Rect(11, 11, 8, 7));
EXPECT_TRUE(ExpectRegionEq(gfx::Rect(10, 18, 10, 2), r));
r = gfx::Rect(10, 10, 10, 10);
r.Subtract(gfx::Rect(12, 11, 7, 8));
EXPECT_TRUE(ExpectRegionEq(gfx::Rect(10, 10, 2, 10), r));
r = gfx::Rect(10, 10, 10, 10);
r.Subtract(gfx::Rect(11, 12, 8, 7));
EXPECT_TRUE(ExpectRegionEq(gfx::Rect(10, 10, 10, 2), r));
// Subtracting a rect that cuts the region in two will choose the larger side.
// Here it's the top side.
r = gfx::Rect(10, 10, 10, 10);
r.Subtract(gfx::Rect(10, 14, 10, 3));
EXPECT_TRUE(ExpectRegionEq(gfx::Rect(10, 10, 10, 4), r));
r = gfx::Rect(10, 10, 10, 10);
r.Subtract(gfx::Rect(0, 14, 30, 3));
EXPECT_TRUE(ExpectRegionEq(gfx::Rect(10, 10, 10, 4), r));
r = gfx::Rect(10, 10, 10, 10);
r.Subtract(gfx::Rect(10, 14, 8, 3));
EXPECT_TRUE(ExpectRegionEq(gfx::Rect(10, 10, 10, 4), r));
r = gfx::Rect(10, 10, 10, 10);
r.Subtract(gfx::Rect(0, 14, 18, 3));
EXPECT_TRUE(ExpectRegionEq(gfx::Rect(10, 10, 10, 4), r));
r = gfx::Rect(10, 10, 10, 10);
r.Subtract(gfx::Rect(12, 14, 18, 3));
EXPECT_TRUE(ExpectRegionEq(gfx::Rect(10, 10, 10, 4), r));
// Here it's the bottom side.
r = gfx::Rect(10, 10, 10, 10);
r.Subtract(gfx::Rect(10, 13, 10, 3));
EXPECT_TRUE(ExpectRegionEq(gfx::Rect(10, 16, 10, 4), r));
r = gfx::Rect(10, 10, 10, 10);
r.Subtract(gfx::Rect(0, 13, 30, 3));
EXPECT_TRUE(ExpectRegionEq(gfx::Rect(10, 16, 10, 4), r));
r = gfx::Rect(10, 10, 10, 10);
r.Subtract(gfx::Rect(10, 13, 8, 3));
EXPECT_TRUE(ExpectRegionEq(gfx::Rect(10, 16, 10, 4), r));
r = gfx::Rect(10, 10, 10, 10);
r.Subtract(gfx::Rect(0, 13, 18, 3));
EXPECT_TRUE(ExpectRegionEq(gfx::Rect(10, 16, 10, 4), r));
r = gfx::Rect(10, 10, 10, 10);
r.Subtract(gfx::Rect(12, 13, 18, 3));
EXPECT_TRUE(ExpectRegionEq(gfx::Rect(10, 16, 10, 4), r));
// Here it's the left side.
r = gfx::Rect(10, 10, 10, 10);
r.Subtract(gfx::Rect(14, 10, 3, 10));
EXPECT_TRUE(ExpectRegionEq(gfx::Rect(10, 10, 4, 10), r));
r = gfx::Rect(10, 10, 10, 10);
r.Subtract(gfx::Rect(14, 10, 3, 10));
EXPECT_TRUE(ExpectRegionEq(gfx::Rect(10, 10, 4, 10), r));
r = gfx::Rect(10, 10, 10, 10);
r.Subtract(gfx::Rect(14, 10, 3, 10));
EXPECT_TRUE(ExpectRegionEq(gfx::Rect(10, 10, 4, 10), r));
r = gfx::Rect(10, 10, 10, 10);
r.Subtract(gfx::Rect(14, 10, 3, 10));
EXPECT_TRUE(ExpectRegionEq(gfx::Rect(10, 10, 4, 10), r));
r = gfx::Rect(10, 10, 10, 10);
r.Subtract(gfx::Rect(14, 10, 3, 10));
EXPECT_TRUE(ExpectRegionEq(gfx::Rect(10, 10, 4, 10), r));
// Here it's the right side.
r = gfx::Rect(10, 10, 10, 10);
r.Subtract(gfx::Rect(13, 10, 3, 10));
EXPECT_TRUE(ExpectRegionEq(gfx::Rect(16, 10, 4, 10), r));
r = gfx::Rect(10, 10, 10, 10);
r.Subtract(gfx::Rect(13, 10, 3, 10));
EXPECT_TRUE(ExpectRegionEq(gfx::Rect(16, 10, 4, 10), r));
r = gfx::Rect(10, 10, 10, 10);
r.Subtract(gfx::Rect(13, 10, 3, 10));
EXPECT_TRUE(ExpectRegionEq(gfx::Rect(16, 10, 4, 10), r));
r = gfx::Rect(10, 10, 10, 10);
r.Subtract(gfx::Rect(13, 10, 3, 10));
EXPECT_TRUE(ExpectRegionEq(gfx::Rect(16, 10, 4, 10), r));
r = gfx::Rect(10, 10, 10, 10);
r.Subtract(gfx::Rect(13, 10, 3, 10));
EXPECT_TRUE(ExpectRegionEq(gfx::Rect(16, 10, 4, 10), r));
// Subtracting a rect that leaves three possible choices will choose the
// larger.
r = gfx::Rect(10, 10, 10, 10);
r.Subtract(gfx::Rect(10, 14, 7, 3));
EXPECT_TRUE(ExpectRegionEq(gfx::Rect(10, 10, 10, 4), r));
r = gfx::Rect(10, 10, 10, 10);
r.Subtract(gfx::Rect(10, 14, 5, 3));
EXPECT_TRUE(ExpectRegionEq(gfx::Rect(15, 10, 5, 10), r));
r = gfx::Rect(10, 10, 10, 10);
r.Subtract(gfx::Rect(13, 14, 7, 3));
EXPECT_TRUE(ExpectRegionEq(gfx::Rect(10, 10, 10, 4), r));
r = gfx::Rect(10, 10, 10, 10);
r.Subtract(gfx::Rect(15, 14, 5, 3));
EXPECT_TRUE(ExpectRegionEq(gfx::Rect(10, 10, 5, 10), r));
r = gfx::Rect(10, 10, 10, 10);
r.Subtract(gfx::Rect(14, 10, 3, 7));
EXPECT_TRUE(ExpectRegionEq(gfx::Rect(10, 10, 4, 10), r));
r = gfx::Rect(10, 10, 10, 10);
r.Subtract(gfx::Rect(14, 10, 3, 5));
EXPECT_TRUE(ExpectRegionEq(gfx::Rect(10, 15, 10, 5), r));
r = gfx::Rect(10, 10, 10, 10);
r.Subtract(gfx::Rect(14, 13, 3, 7));
EXPECT_TRUE(ExpectRegionEq(gfx::Rect(10, 10, 4, 10), r));
r = gfx::Rect(10, 10, 10, 10);
r.Subtract(gfx::Rect(14, 15, 3, 5));
EXPECT_TRUE(ExpectRegionEq(gfx::Rect(10, 10, 10, 5), r));
}
} // namespace
} // namespace cc