xref: /aosp_15_r20/external/libchrome/ui/gfx/geometry/axis_transform2d_unittest.cc (revision 635a864187cb8b6c713ff48b7e790a6b21769273)
1 // Copyright 2017 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 "ui/gfx/geometry/axis_transform2d.h"
6 
7 #include "testing/gtest/include/gtest/gtest.h"
8 #include "ui/gfx/test/gfx_util.h"
9 
10 namespace gfx {
11 namespace {
12 
TEST(AxisTransform2dTest,Mapping)13 TEST(AxisTransform2dTest, Mapping) {
14   AxisTransform2d t(1.25f, Vector2dF(3.75f, 55.f));
15 
16   PointF p(150.f, 100.f);
17   EXPECT_EQ(PointF(191.25f, 180.f), t.MapPoint(p));
18   EXPECT_POINTF_EQ(PointF(117.f, 36.f), t.InverseMapPoint(p));
19 
20   RectF r(150.f, 100.f, 22.5f, 37.5f);
21   EXPECT_EQ(RectF(191.25f, 180.f, 28.125f, 46.875f), t.MapRect(r));
22   EXPECT_RECTF_EQ(RectF(117.f, 36.f, 18.f, 30.f), t.InverseMapRect(r));
23 }
24 
TEST(AxisTransform2dTest,Scaling)25 TEST(AxisTransform2dTest, Scaling) {
26   {
27     AxisTransform2d t(1.25f, Vector2dF(3.75f, 55.f));
28     EXPECT_EQ(AxisTransform2d(1.5625f, Vector2dF(3.75f, 55.f)),
29               PreScaleAxisTransform2d(t, 1.25));
30     t.PreScale(1.25);
31     EXPECT_EQ(AxisTransform2d(1.5625f, Vector2dF(3.75f, 55.f)), t);
32   }
33 
34   {
35     AxisTransform2d t(1.25f, Vector2dF(3.75f, 55.f));
36     EXPECT_EQ(AxisTransform2d(1.5625f, Vector2dF(4.6875f, 68.75f)),
37               PostScaleAxisTransform2d(t, 1.25));
38     t.PostScale(1.25);
39     EXPECT_EQ(AxisTransform2d(1.5625f, Vector2dF(4.6875f, 68.75f)), t);
40   }
41 }
42 
TEST(AxisTransform2dTest,Translating)43 TEST(AxisTransform2dTest, Translating) {
44   Vector2dF tr(3.f, -5.f);
45   {
46     AxisTransform2d t(1.25f, Vector2dF(3.75f, 55.f));
47     EXPECT_EQ(AxisTransform2d(1.25f, Vector2dF(7.5f, 48.75f)),
48               PreTranslateAxisTransform2d(t, tr));
49     t.PreTranslate(tr);
50     EXPECT_EQ(AxisTransform2d(1.25f, Vector2dF(7.5f, 48.75f)), t);
51   }
52 
53   {
54     AxisTransform2d t(1.25f, Vector2dF(3.75f, 55.f));
55     EXPECT_EQ(AxisTransform2d(1.25f, Vector2dF(6.75f, 50.f)),
56               PostTranslateAxisTransform2d(t, tr));
57     t.PostTranslate(tr);
58     EXPECT_EQ(AxisTransform2d(1.25f, Vector2dF(6.75f, 50.f)), t);
59   }
60 }
61 
TEST(AxisTransform2dTest,Concat)62 TEST(AxisTransform2dTest, Concat) {
63   AxisTransform2d pre(1.25f, Vector2dF(3.75f, 55.f));
64   AxisTransform2d post(0.5f, Vector2dF(10.f, 5.f));
65   AxisTransform2d expectation(0.625f, Vector2dF(11.875f, 32.5f));
66   EXPECT_EQ(expectation, ConcatAxisTransform2d(post, pre));
67 
68   AxisTransform2d post_concat = pre;
69   post_concat.PostConcat(post);
70   EXPECT_EQ(expectation, post_concat);
71 
72   AxisTransform2d pre_concat = post;
73   pre_concat.PreConcat(pre);
74   EXPECT_EQ(expectation, pre_concat);
75 }
76 
TEST(AxisTransform2dTest,Inverse)77 TEST(AxisTransform2dTest, Inverse) {
78   AxisTransform2d t(1.25f, Vector2dF(3.75f, 55.f));
79   AxisTransform2d inv_inplace = t;
80   inv_inplace.Invert();
81   AxisTransform2d inv_out_of_place = InvertAxisTransform2d(t);
82 
83   EXPECT_AXIS_TRANSFORM2D_EQ(inv_inplace, inv_out_of_place);
84   EXPECT_AXIS_TRANSFORM2D_EQ(AxisTransform2d(),
85                              ConcatAxisTransform2d(t, inv_inplace));
86   EXPECT_AXIS_TRANSFORM2D_EQ(AxisTransform2d(),
87                              ConcatAxisTransform2d(inv_inplace, t));
88 }
89 
90 }  // namespace
91 }  // namespace gfx
92