1// Copyright 2012 The Chromium Authors. All rights reserved.
2// Use of this source code is governed by a BSD-style license that can be
3// found in the LICENSE file.
4
5#include "cc/test/geometry_test_utils.h"
6
7#include "base/logging.h"
8#include "testing/gtest/include/gtest/gtest.h"
9#include "ui/gfx/transform.h"
10
11namespace cc {
12
13// NOTE: even though transform data types use double precision, we only check
14// for equality within single-precision error bounds because many transforms
15// originate from single-precision data types such as quads/rects/etc.
16
17void ExpectTransformationMatrixEq(const gfx::Transform& expected,
18                                  const gfx::Transform& actual) {
19  EXPECT_FLOAT_EQ((expected).matrix().get(0, 0), (actual).matrix().get(0, 0));
20  EXPECT_FLOAT_EQ((expected).matrix().get(1, 0), (actual).matrix().get(1, 0));
21  EXPECT_FLOAT_EQ((expected).matrix().get(2, 0), (actual).matrix().get(2, 0));
22  EXPECT_FLOAT_EQ((expected).matrix().get(3, 0), (actual).matrix().get(3, 0));
23  EXPECT_FLOAT_EQ((expected).matrix().get(0, 1), (actual).matrix().get(0, 1));
24  EXPECT_FLOAT_EQ((expected).matrix().get(1, 1), (actual).matrix().get(1, 1));
25  EXPECT_FLOAT_EQ((expected).matrix().get(2, 1), (actual).matrix().get(2, 1));
26  EXPECT_FLOAT_EQ((expected).matrix().get(3, 1), (actual).matrix().get(3, 1));
27  EXPECT_FLOAT_EQ((expected).matrix().get(0, 2), (actual).matrix().get(0, 2));
28  EXPECT_FLOAT_EQ((expected).matrix().get(1, 2), (actual).matrix().get(1, 2));
29  EXPECT_FLOAT_EQ((expected).matrix().get(2, 2), (actual).matrix().get(2, 2));
30  EXPECT_FLOAT_EQ((expected).matrix().get(3, 2), (actual).matrix().get(3, 2));
31  EXPECT_FLOAT_EQ((expected).matrix().get(0, 3), (actual).matrix().get(0, 3));
32  EXPECT_FLOAT_EQ((expected).matrix().get(1, 3), (actual).matrix().get(1, 3));
33  EXPECT_FLOAT_EQ((expected).matrix().get(2, 3), (actual).matrix().get(2, 3));
34  EXPECT_FLOAT_EQ((expected).matrix().get(3, 3), (actual).matrix().get(3, 3));
35}
36
37gfx::Transform Inverse(const gfx::Transform& transform) {
38  gfx::Transform result(gfx::Transform::kSkipInitialization);
39  bool inverted_successfully = transform.GetInverse(&result);
40  DCHECK(inverted_successfully);
41  return result;
42}
43
44}  // namespace cc
45