1// Copyright 2011 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/base/math_util.h"
6#include "testing/gtest/include/gtest/gtest.h"
7#include "ui/gfx/quad_f.h"
8#include "ui/gfx/rect_f.h"
9#include "ui/gfx/transform.h"
10
11namespace cc {
12namespace {
13
14// TODO(danakj) Move this test to ui/gfx/ when we don't need MathUtil::MapQuad.
15TEST(FloatQuadTest, IsRectilinearTest) {
16  const int kNumRectilinear = 8;
17  gfx::Transform rectilinear_trans[kNumRectilinear];
18  rectilinear_trans[1].Rotate(90.f);
19  rectilinear_trans[2].Rotate(180.f);
20  rectilinear_trans[3].Rotate(270.f);
21  rectilinear_trans[4].SkewX(0.00000000001f);
22  rectilinear_trans[5].SkewY(0.00000000001f);
23  rectilinear_trans[6].Scale(0.00001f, 0.00001f);
24  rectilinear_trans[6].Rotate(180.f);
25  rectilinear_trans[7].Scale(100000.f, 100000.f);
26  rectilinear_trans[7].Rotate(180.f);
27
28  gfx::QuadF original(
29      gfx::RectF(0.01010101f, 0.01010101f, 100.01010101f, 100.01010101f));
30
31  for (int i = 0; i < kNumRectilinear; ++i) {
32    bool clipped = false;
33    gfx::QuadF quad =
34        MathUtil::MapQuad(rectilinear_trans[i], original, &clipped);
35    ASSERT_TRUE(!clipped) << "case " << i;
36    EXPECT_TRUE(quad.IsRectilinear()) << "case " << i;
37  }
38
39  const int kNumNonRectilinear = 10;
40  gfx::Transform non_rectilinear_trans[kNumNonRectilinear];
41  non_rectilinear_trans[0].Rotate(359.9999f);
42  non_rectilinear_trans[1].Rotate(0.0000001f);
43  non_rectilinear_trans[2].Rotate(89.9999f);
44  non_rectilinear_trans[3].Rotate(90.00001f);
45  non_rectilinear_trans[4].Rotate(179.9999f);
46  non_rectilinear_trans[5].Rotate(180.00001f);
47  non_rectilinear_trans[6].Rotate(269.9999f);
48  non_rectilinear_trans[7].Rotate(270.0001f);
49  non_rectilinear_trans[8].SkewX(0.00001f);
50  non_rectilinear_trans[9].SkewY(0.00001f);
51
52  for (int i = 0; i < kNumNonRectilinear; ++i) {
53    bool clipped = false;
54    gfx::QuadF quad =
55        MathUtil::MapQuad(non_rectilinear_trans[i], original, &clipped);
56    ASSERT_TRUE(!clipped) << "case " << i;
57    EXPECT_FALSE(quad.IsRectilinear()) << "case " << i;
58  }
59}
60
61}  // namespace
62}  // namespace cc
63