| // Copyright 2017 PDFium 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 "core/fxcrt/fx_coordinates.h" |
| |
| #include <limits> |
| #include <vector> |
| |
| #include "testing/gtest/include/gtest/gtest.h" |
| |
| namespace { |
| |
| constexpr float kMinFloat = std::numeric_limits<float>::min(); |
| constexpr int kMaxInt = std::numeric_limits<int>::max(); |
| constexpr int kMinInt = std::numeric_limits<int>::min(); |
| constexpr float kMinIntAsFloat = static_cast<float>(kMinInt); |
| constexpr float kMaxIntAsFloat = static_cast<float>(kMaxInt); |
| |
| } // namespace |
| |
| TEST(CFX_FloatRect, FromFXRect) { |
| FX_RECT downwards(10, 20, 30, 40); |
| CFX_FloatRect rect(downwards); |
| EXPECT_FLOAT_EQ(rect.left, 10.0f); |
| EXPECT_FLOAT_EQ(rect.bottom, 20.0f); |
| EXPECT_FLOAT_EQ(rect.right, 30.0f); |
| EXPECT_FLOAT_EQ(rect.top, 40.0f); |
| } |
| |
| TEST(CFX_FloatRect, GetBBox) { |
| CFX_FloatRect rect = CFX_FloatRect::GetBBox(nullptr, 0); |
| EXPECT_FLOAT_EQ(0.0f, rect.left); |
| EXPECT_FLOAT_EQ(0.0f, rect.bottom); |
| EXPECT_FLOAT_EQ(0.0f, rect.right); |
| EXPECT_FLOAT_EQ(0.0f, rect.top); |
| |
| std::vector<CFX_PointF> data; |
| data.emplace_back(0.0f, 0.0f); |
| rect = CFX_FloatRect::GetBBox(data.data(), 0); |
| EXPECT_FLOAT_EQ(0.0f, rect.left); |
| EXPECT_FLOAT_EQ(0.0f, rect.bottom); |
| EXPECT_FLOAT_EQ(0.0f, rect.right); |
| EXPECT_FLOAT_EQ(0.0f, rect.top); |
| rect = CFX_FloatRect::GetBBox(data.data(), data.size()); |
| EXPECT_FLOAT_EQ(0.0f, rect.left); |
| EXPECT_FLOAT_EQ(0.0f, rect.bottom); |
| EXPECT_FLOAT_EQ(0.0f, rect.right); |
| EXPECT_FLOAT_EQ(0.0f, rect.top); |
| |
| data.emplace_back(2.5f, 6.2f); |
| data.emplace_back(1.5f, 6.2f); |
| rect = CFX_FloatRect::GetBBox(data.data(), 2); |
| EXPECT_FLOAT_EQ(0.0f, rect.left); |
| EXPECT_FLOAT_EQ(0.0f, rect.bottom); |
| EXPECT_FLOAT_EQ(2.5f, rect.right); |
| EXPECT_FLOAT_EQ(6.2f, rect.top); |
| |
| rect = CFX_FloatRect::GetBBox(data.data(), data.size()); |
| EXPECT_FLOAT_EQ(0.0f, rect.left); |
| EXPECT_FLOAT_EQ(0.0f, rect.bottom); |
| EXPECT_FLOAT_EQ(2.5f, rect.right); |
| EXPECT_FLOAT_EQ(6.2f, rect.top); |
| |
| data.emplace_back(2.5f, 6.3f); |
| rect = CFX_FloatRect::GetBBox(data.data(), data.size()); |
| EXPECT_FLOAT_EQ(0.0f, rect.left); |
| EXPECT_FLOAT_EQ(0.0f, rect.bottom); |
| EXPECT_FLOAT_EQ(2.5f, rect.right); |
| EXPECT_FLOAT_EQ(6.3f, rect.top); |
| |
| data.emplace_back(-3.0f, 6.3f); |
| rect = CFX_FloatRect::GetBBox(data.data(), data.size()); |
| EXPECT_FLOAT_EQ(-3.0f, rect.left); |
| EXPECT_FLOAT_EQ(0.0f, rect.bottom); |
| EXPECT_FLOAT_EQ(2.5f, rect.right); |
| EXPECT_FLOAT_EQ(6.3f, rect.top); |
| |
| data.emplace_back(4.0f, -8.0f); |
| rect = CFX_FloatRect::GetBBox(data.data(), data.size()); |
| EXPECT_FLOAT_EQ(-3.0f, rect.left); |
| EXPECT_FLOAT_EQ(-8.0f, rect.bottom); |
| EXPECT_FLOAT_EQ(4.0f, rect.right); |
| EXPECT_FLOAT_EQ(6.3f, rect.top); |
| } |
| |
| TEST(CFX_FloatRect, GetInnerRect) { |
| FX_RECT inner_rect; |
| CFX_FloatRect rect; |
| |
| inner_rect = rect.GetInnerRect(); |
| EXPECT_EQ(0, inner_rect.left); |
| EXPECT_EQ(0, inner_rect.bottom); |
| EXPECT_EQ(0, inner_rect.right); |
| EXPECT_EQ(0, inner_rect.top); |
| |
| // Function converts from float to int using floor() for top and right, and |
| // ceil() for left and bottom. |
| rect = CFX_FloatRect(-1.1f, 3.6f, 4.4f, -5.7f); |
| inner_rect = rect.GetInnerRect(); |
| EXPECT_EQ(-1, inner_rect.left); |
| EXPECT_EQ(4, inner_rect.bottom); |
| EXPECT_EQ(4, inner_rect.right); |
| EXPECT_EQ(-6, inner_rect.top); |
| |
| rect = CFX_FloatRect(kMinFloat, kMinFloat, kMinFloat, kMinFloat); |
| inner_rect = rect.GetInnerRect(); |
| EXPECT_EQ(0, inner_rect.left); |
| EXPECT_EQ(1, inner_rect.bottom); |
| EXPECT_EQ(1, inner_rect.right); |
| EXPECT_EQ(0, inner_rect.top); |
| |
| rect = CFX_FloatRect(-kMinFloat, -kMinFloat, -kMinFloat, -kMinFloat); |
| inner_rect = rect.GetInnerRect(); |
| EXPECT_EQ(-1, inner_rect.left); |
| EXPECT_EQ(0, inner_rect.bottom); |
| EXPECT_EQ(0, inner_rect.right); |
| EXPECT_EQ(-1, inner_rect.top); |
| |
| // Check at limits of integer range. When saturated would expect to get values |
| // that are clamped to the limits of integers, but instead it is returning all |
| // negative values that represent a rectangle as a dot in a far reach of the |
| // negative coordinate space. Related to crbug.com/1019026 |
| rect = CFX_FloatRect(kMinIntAsFloat, kMinIntAsFloat, kMaxIntAsFloat, |
| kMaxIntAsFloat); |
| inner_rect = rect.GetInnerRect(); |
| EXPECT_EQ(kMinInt, inner_rect.left); |
| EXPECT_EQ(kMaxInt, inner_rect.bottom); |
| EXPECT_EQ(kMaxInt, inner_rect.right); |
| EXPECT_EQ(kMinInt, inner_rect.top); |
| |
| rect = CFX_FloatRect(kMinIntAsFloat - 1.0f, kMinIntAsFloat - 1.0f, |
| kMaxIntAsFloat + 1.0f, kMaxIntAsFloat + 1.0f); |
| inner_rect = rect.GetInnerRect(); |
| EXPECT_EQ(kMinInt, inner_rect.left); |
| EXPECT_EQ(kMaxInt, inner_rect.bottom); |
| EXPECT_EQ(kMaxInt, inner_rect.right); |
| EXPECT_EQ(kMinInt, inner_rect.top); |
| } |
| |
| TEST(CFX_FloatRect, GetOuterRect) { |
| FX_RECT outer_rect; |
| CFX_FloatRect rect; |
| |
| outer_rect = rect.GetOuterRect(); |
| EXPECT_EQ(0, outer_rect.left); |
| EXPECT_EQ(0, outer_rect.bottom); |
| EXPECT_EQ(0, outer_rect.right); |
| EXPECT_EQ(0, outer_rect.top); |
| |
| // Function converts from float to int using floor() for left and bottom, and |
| // ceil() for right and top. |
| rect = CFX_FloatRect(-1.1f, 3.6f, 4.4f, -5.7f); |
| outer_rect = rect.GetOuterRect(); |
| EXPECT_EQ(-2, outer_rect.left); |
| EXPECT_EQ(3, outer_rect.bottom); |
| EXPECT_EQ(5, outer_rect.right); |
| EXPECT_EQ(-5, outer_rect.top); |
| |
| rect = CFX_FloatRect(kMinFloat, kMinFloat, kMinFloat, kMinFloat); |
| outer_rect = rect.GetOuterRect(); |
| EXPECT_EQ(0, outer_rect.left); |
| EXPECT_EQ(1, outer_rect.bottom); |
| EXPECT_EQ(1, outer_rect.right); |
| EXPECT_EQ(0, outer_rect.top); |
| |
| rect = CFX_FloatRect(-kMinFloat, -kMinFloat, -kMinFloat, -kMinFloat); |
| outer_rect = rect.GetOuterRect(); |
| EXPECT_EQ(-1, outer_rect.left); |
| EXPECT_EQ(0, outer_rect.bottom); |
| EXPECT_EQ(0, outer_rect.right); |
| EXPECT_EQ(-1, outer_rect.top); |
| |
| // Check at limits of integer range. When saturated would expect to get values |
| // that are clamped to the limits of integers. |
| rect = CFX_FloatRect(kMinIntAsFloat, kMinIntAsFloat, kMaxIntAsFloat, |
| kMaxIntAsFloat); |
| outer_rect = rect.GetOuterRect(); |
| EXPECT_EQ(kMinInt, outer_rect.left); |
| EXPECT_EQ(kMaxInt, outer_rect.bottom); |
| EXPECT_EQ(kMaxInt, outer_rect.right); |
| EXPECT_EQ(kMinInt, outer_rect.top); |
| |
| rect = CFX_FloatRect(kMinIntAsFloat - 1.0f, kMinIntAsFloat - 1.0f, |
| kMaxIntAsFloat + 1.0f, kMaxIntAsFloat + 1.0f); |
| outer_rect = rect.GetOuterRect(); |
| EXPECT_EQ(kMinInt, outer_rect.left); |
| EXPECT_EQ(kMaxInt, outer_rect.bottom); |
| EXPECT_EQ(kMaxInt, outer_rect.right); |
| EXPECT_EQ(kMinInt, outer_rect.top); |
| } |
| |
| TEST(CFX_FloatRect, Normalize) { |
| CFX_FloatRect rect; |
| rect.Normalize(); |
| EXPECT_FLOAT_EQ(0.0f, rect.left); |
| EXPECT_FLOAT_EQ(0.0f, rect.bottom); |
| EXPECT_FLOAT_EQ(0.0f, rect.right); |
| EXPECT_FLOAT_EQ(0.0f, rect.top); |
| |
| rect = CFX_FloatRect(-1.0f, -3.0f, 4.5f, 3.2f); |
| rect.Normalize(); |
| EXPECT_FLOAT_EQ(-1.0f, rect.left); |
| EXPECT_FLOAT_EQ(-3.0f, rect.bottom); |
| EXPECT_FLOAT_EQ(4.5f, rect.right); |
| EXPECT_FLOAT_EQ(3.2f, rect.top); |
| rect.Scale(-1.0f); |
| rect.Normalize(); |
| EXPECT_FLOAT_EQ(-4.5f, rect.left); |
| EXPECT_FLOAT_EQ(-3.2f, rect.bottom); |
| EXPECT_FLOAT_EQ(1.0f, rect.right); |
| EXPECT_FLOAT_EQ(3.0f, rect.top); |
| } |
| |
| TEST(CFX_FloatRect, Scale) { |
| CFX_FloatRect rect(-1.0f, -3.0f, 4.5f, 3.2f); |
| rect.Scale(1.0f); |
| EXPECT_FLOAT_EQ(-1.0f, rect.left); |
| EXPECT_FLOAT_EQ(-3.0f, rect.bottom); |
| EXPECT_FLOAT_EQ(4.5f, rect.right); |
| EXPECT_FLOAT_EQ(3.2f, rect.top); |
| rect.Scale(0.5f); |
| EXPECT_FLOAT_EQ(-0.5, rect.left); |
| EXPECT_FLOAT_EQ(-1.5, rect.bottom); |
| EXPECT_FLOAT_EQ(2.25f, rect.right); |
| EXPECT_FLOAT_EQ(1.6f, rect.top); |
| rect.Scale(2.0f); |
| EXPECT_FLOAT_EQ(-1.0f, rect.left); |
| EXPECT_FLOAT_EQ(-3.0f, rect.bottom); |
| EXPECT_FLOAT_EQ(4.5f, rect.right); |
| EXPECT_FLOAT_EQ(3.2f, rect.top); |
| rect.Scale(-1.0f); |
| EXPECT_FLOAT_EQ(1.0f, rect.left); |
| EXPECT_FLOAT_EQ(3.0f, rect.bottom); |
| EXPECT_FLOAT_EQ(-4.5f, rect.right); |
| EXPECT_FLOAT_EQ(-3.2f, rect.top); |
| rect.Scale(0.0f); |
| EXPECT_FLOAT_EQ(0.0f, rect.left); |
| EXPECT_FLOAT_EQ(0.0f, rect.bottom); |
| EXPECT_FLOAT_EQ(0.0f, rect.right); |
| EXPECT_FLOAT_EQ(0.0f, rect.top); |
| } |
| |
| TEST(CFX_FloatRect, ScaleEmpty) { |
| CFX_FloatRect rect; |
| rect.Scale(1.0f); |
| EXPECT_FLOAT_EQ(0.0f, rect.left); |
| EXPECT_FLOAT_EQ(0.0f, rect.bottom); |
| EXPECT_FLOAT_EQ(0.0f, rect.right); |
| EXPECT_FLOAT_EQ(0.0f, rect.top); |
| rect.Scale(0.5f); |
| EXPECT_FLOAT_EQ(0.0f, rect.left); |
| EXPECT_FLOAT_EQ(0.0f, rect.bottom); |
| EXPECT_FLOAT_EQ(0.0f, rect.right); |
| EXPECT_FLOAT_EQ(0.0f, rect.top); |
| rect.Scale(2.0f); |
| EXPECT_FLOAT_EQ(0.0f, rect.left); |
| EXPECT_FLOAT_EQ(0.0f, rect.bottom); |
| EXPECT_FLOAT_EQ(0.0f, rect.right); |
| EXPECT_FLOAT_EQ(0.0f, rect.top); |
| rect.Scale(0.0f); |
| EXPECT_FLOAT_EQ(0.0f, rect.left); |
| EXPECT_FLOAT_EQ(0.0f, rect.bottom); |
| EXPECT_FLOAT_EQ(0.0f, rect.right); |
| EXPECT_FLOAT_EQ(0.0f, rect.top); |
| } |
| |
| TEST(CFX_FloatRect, ScaleFromCenterPoint) { |
| CFX_FloatRect rect(-1.0f, -3.0f, 4.5f, 3.2f); |
| rect.ScaleFromCenterPoint(1.0f); |
| EXPECT_FLOAT_EQ(-1.0f, rect.left); |
| EXPECT_FLOAT_EQ(-3.0f, rect.bottom); |
| EXPECT_FLOAT_EQ(4.5f, rect.right); |
| EXPECT_FLOAT_EQ(3.2f, rect.top); |
| rect.ScaleFromCenterPoint(0.5f); |
| EXPECT_FLOAT_EQ(0.375f, rect.left); |
| EXPECT_FLOAT_EQ(-1.45f, rect.bottom); |
| EXPECT_FLOAT_EQ(3.125f, rect.right); |
| EXPECT_FLOAT_EQ(1.65f, rect.top); |
| rect.ScaleFromCenterPoint(2.0f); |
| EXPECT_FLOAT_EQ(-1.0f, rect.left); |
| EXPECT_FLOAT_EQ(-3.0f, rect.bottom); |
| EXPECT_FLOAT_EQ(4.5f, rect.right); |
| EXPECT_FLOAT_EQ(3.2f, rect.top); |
| rect.ScaleFromCenterPoint(-1.0f); |
| EXPECT_FLOAT_EQ(4.5f, rect.left); |
| EXPECT_FLOAT_EQ(3.2f, rect.bottom); |
| EXPECT_FLOAT_EQ(-1.0f, rect.right); |
| EXPECT_FLOAT_EQ(-3.0f, rect.top); |
| rect.ScaleFromCenterPoint(0.0f); |
| EXPECT_FLOAT_EQ(1.75f, rect.left); |
| EXPECT_NEAR(0.1f, rect.bottom, 0.001f); |
| EXPECT_FLOAT_EQ(1.75f, rect.right); |
| EXPECT_NEAR(0.1f, rect.top, 0.001f); |
| } |
| |
| TEST(CFX_FloatRect, ScaleFromCenterPointEmpty) { |
| CFX_FloatRect rect; |
| rect.ScaleFromCenterPoint(1.0f); |
| EXPECT_FLOAT_EQ(0.0f, rect.left); |
| EXPECT_FLOAT_EQ(0.0f, rect.bottom); |
| EXPECT_FLOAT_EQ(0.0f, rect.right); |
| EXPECT_FLOAT_EQ(0.0f, rect.top); |
| rect.ScaleFromCenterPoint(0.5f); |
| EXPECT_FLOAT_EQ(0.0f, rect.left); |
| EXPECT_FLOAT_EQ(0.0f, rect.bottom); |
| EXPECT_FLOAT_EQ(0.0f, rect.right); |
| EXPECT_FLOAT_EQ(0.0f, rect.top); |
| rect.ScaleFromCenterPoint(2.0f); |
| EXPECT_FLOAT_EQ(0.0f, rect.left); |
| EXPECT_FLOAT_EQ(0.0f, rect.bottom); |
| EXPECT_FLOAT_EQ(0.0f, rect.right); |
| EXPECT_FLOAT_EQ(0.0f, rect.top); |
| rect.ScaleFromCenterPoint(0.0f); |
| EXPECT_FLOAT_EQ(0.0f, rect.left); |
| EXPECT_FLOAT_EQ(0.0f, rect.bottom); |
| EXPECT_FLOAT_EQ(0.0f, rect.right); |
| EXPECT_FLOAT_EQ(0.0f, rect.top); |
| } |
| |
| #ifndef NDEBUG |
| TEST(CFX_FloatRect, Print) { |
| std::ostringstream os; |
| CFX_FloatRect rect; |
| os << rect; |
| EXPECT_STREQ("rect[w 0 x h 0 (left 0, bot 0)]", os.str().c_str()); |
| |
| os.str(""); |
| rect = CFX_FloatRect(10, 20, 14, 23); |
| os << rect; |
| EXPECT_STREQ("rect[w 4 x h 3 (left 10, bot 20)]", os.str().c_str()); |
| |
| os.str(""); |
| rect = CFX_FloatRect(10.5, 20.5, 14.75, 23.75); |
| os << rect; |
| EXPECT_STREQ("rect[w 4.25 x h 3.25 (left 10.5, bot 20.5)]", os.str().c_str()); |
| } |
| |
| TEST(CFX_RectF, Print) { |
| std::ostringstream os; |
| CFX_RectF rect; |
| os << rect; |
| EXPECT_STREQ("rect[w 0 x h 0 (left 0, top 0)]", os.str().c_str()); |
| |
| os.str(""); |
| rect = CFX_RectF(10, 20, 4, 3); |
| os << rect; |
| EXPECT_STREQ("rect[w 4 x h 3 (left 10, top 20)]", os.str().c_str()); |
| |
| os.str(""); |
| rect = CFX_RectF(10.5, 20.5, 4.25, 3.25); |
| os << rect; |
| EXPECT_STREQ("rect[w 4.25 x h 3.25 (left 10.5, top 20.5)]", os.str().c_str()); |
| } |
| #endif // NDEBUG |
| |
| TEST(CFX_Matrix, ReverseIdentity) { |
| CFX_Matrix rev = CFX_Matrix().GetInverse(); |
| |
| EXPECT_FLOAT_EQ(1.0, rev.a); |
| EXPECT_FLOAT_EQ(0.0, rev.b); |
| EXPECT_FLOAT_EQ(0.0, rev.c); |
| EXPECT_FLOAT_EQ(1.0, rev.d); |
| EXPECT_FLOAT_EQ(0.0, rev.e); |
| EXPECT_FLOAT_EQ(0.0, rev.f); |
| |
| CFX_PointF expected(2, 3); |
| CFX_PointF result = rev.Transform(CFX_Matrix().Transform(CFX_PointF(2, 3))); |
| EXPECT_FLOAT_EQ(expected.x, result.x); |
| EXPECT_FLOAT_EQ(expected.y, result.y); |
| } |
| |
| TEST(CFX_Matrix, SetIdentity) { |
| CFX_Matrix m; |
| EXPECT_FLOAT_EQ(1.0f, m.a); |
| EXPECT_FLOAT_EQ(0.0f, m.b); |
| EXPECT_FLOAT_EQ(0.0f, m.c); |
| EXPECT_FLOAT_EQ(1.0f, m.d); |
| EXPECT_FLOAT_EQ(0.0f, m.e); |
| EXPECT_FLOAT_EQ(0.0f, m.f); |
| EXPECT_TRUE(m.IsIdentity()); |
| |
| m.a = -1; |
| EXPECT_FALSE(m.IsIdentity()); |
| |
| m = CFX_Matrix(); |
| EXPECT_FLOAT_EQ(1.0f, m.a); |
| EXPECT_FLOAT_EQ(0.0f, m.b); |
| EXPECT_FLOAT_EQ(0.0f, m.c); |
| EXPECT_FLOAT_EQ(1.0f, m.d); |
| EXPECT_FLOAT_EQ(0.0f, m.e); |
| EXPECT_FLOAT_EQ(0.0f, m.f); |
| EXPECT_TRUE(m.IsIdentity()); |
| } |
| |
| TEST(CFX_Matrix, GetInverse) { |
| static constexpr float data[6] = {3, 0, 2, 3, 1, 4}; |
| CFX_Matrix m(data); |
| CFX_Matrix rev = m.GetInverse(); |
| |
| EXPECT_FLOAT_EQ(0.33333334f, rev.a); |
| EXPECT_FLOAT_EQ(0.0f, rev.b); |
| EXPECT_FLOAT_EQ(-0.22222222f, rev.c); |
| EXPECT_FLOAT_EQ(0.33333334f, rev.d); |
| EXPECT_FLOAT_EQ(0.55555556f, rev.e); |
| EXPECT_FLOAT_EQ(-1.3333334f, rev.f); |
| |
| CFX_PointF expected(2, 3); |
| CFX_PointF result = rev.Transform(m.Transform(CFX_PointF(2, 3))); |
| EXPECT_FLOAT_EQ(expected.x, result.x); |
| EXPECT_FLOAT_EQ(expected.y, result.y); |
| } |
| |
| // Note, I think these are a bug and the matrix should be the identity. |
| TEST(CFX_Matrix, GetInverseCR702041) { |
| // The determinate is < std::numeric_limits<float>::epsilon() |
| static constexpr float data[6] = {0.947368443f, -0.108947366f, -0.923076928f, |
| 0.106153846f, 18.0f, 787.929993f}; |
| CFX_Matrix m(data); |
| CFX_Matrix rev = m.GetInverse(); |
| |
| EXPECT_FLOAT_EQ(14247728.0f, rev.a); |
| EXPECT_FLOAT_EQ(14622668.0f, rev.b); |
| EXPECT_FLOAT_EQ(1.2389329e+08f, rev.c); |
| EXPECT_FLOAT_EQ(1.2715364e+08f, rev.d); |
| EXPECT_FLOAT_EQ(-9.7875698e+10f, rev.e); |
| EXPECT_FLOAT_EQ(-1.0045138e+11f, rev.f); |
| |
| // Should be 2, 3 |
| CFX_PointF expected(0, 0); |
| CFX_PointF result = rev.Transform(m.Transform(CFX_PointF(2, 3))); |
| EXPECT_FLOAT_EQ(expected.x, result.x); |
| EXPECT_FLOAT_EQ(expected.y, result.y); |
| } |
| |
| TEST(CFX_Matrix, GetInverseCR714187) { |
| // The determinate is < std::numeric_limits<float>::epsilon() |
| static constexpr float data[6] = {0.000037f, 0.0f, 0.0f, |
| -0.000037f, 182.413101f, 136.977646f}; |
| CFX_Matrix m(data); |
| CFX_Matrix rev = m.GetInverse(); |
| |
| EXPECT_FLOAT_EQ(27027.025f, rev.a); |
| EXPECT_FLOAT_EQ(0.0f, rev.b); |
| EXPECT_FLOAT_EQ(0.0f, rev.c); |
| EXPECT_FLOAT_EQ(-27027.025f, rev.d); |
| EXPECT_FLOAT_EQ(-4930083.5f, rev.e); |
| EXPECT_FLOAT_EQ(3702098.2f, rev.f); |
| |
| // Should be 3 .... |
| CFX_PointF expected(2, 2.75); |
| CFX_PointF result = rev.Transform(m.Transform(CFX_PointF(2, 3))); |
| EXPECT_FLOAT_EQ(expected.x, result.x); |
| EXPECT_FLOAT_EQ(expected.y, result.y); |
| } |
| |
| #define EXPECT_NEAR_FIVE_PLACES(a, b) EXPECT_NEAR((a), (b), 1e-5) |
| |
| TEST(CFX_Matrix, ComposeTransformations) { |
| // sin(FX_PI/2) and cos(FX_PI/2) have a tiny error and are not exactly 1.0f |
| // and 0.0f. The rotation matrix is thus not perfect. |
| |
| CFX_Matrix rotate_90; |
| rotate_90.Rotate(FX_PI / 2); |
| EXPECT_NEAR_FIVE_PLACES(0.0f, rotate_90.a); |
| EXPECT_NEAR_FIVE_PLACES(1.0f, rotate_90.b); |
| EXPECT_NEAR_FIVE_PLACES(-1.0f, rotate_90.c); |
| EXPECT_NEAR_FIVE_PLACES(0.0f, rotate_90.d); |
| EXPECT_FLOAT_EQ(0.0f, rotate_90.e); |
| EXPECT_FLOAT_EQ(0.0f, rotate_90.f); |
| |
| CFX_Matrix translate_23_11; |
| translate_23_11.Translate(23, 11); |
| EXPECT_FLOAT_EQ(1.0f, translate_23_11.a); |
| EXPECT_FLOAT_EQ(0.0f, translate_23_11.b); |
| EXPECT_FLOAT_EQ(0.0f, translate_23_11.c); |
| EXPECT_FLOAT_EQ(1.0f, translate_23_11.d); |
| EXPECT_FLOAT_EQ(23.0f, translate_23_11.e); |
| EXPECT_FLOAT_EQ(11.0f, translate_23_11.f); |
| |
| CFX_Matrix scale_5_13; |
| scale_5_13.Scale(5, 13); |
| EXPECT_FLOAT_EQ(5.0f, scale_5_13.a); |
| EXPECT_FLOAT_EQ(0.0f, scale_5_13.b); |
| EXPECT_FLOAT_EQ(0.0f, scale_5_13.c); |
| EXPECT_FLOAT_EQ(13.0f, scale_5_13.d); |
| EXPECT_FLOAT_EQ(0.0, scale_5_13.e); |
| EXPECT_FLOAT_EQ(0.0, scale_5_13.f); |
| |
| // Apply the transforms to points step by step. |
| CFX_PointF origin_transformed(0, 0); |
| CFX_PointF p_10_20_transformed(10, 20); |
| |
| origin_transformed = rotate_90.Transform(origin_transformed); |
| EXPECT_FLOAT_EQ(0.0f, origin_transformed.x); |
| EXPECT_FLOAT_EQ(0.0f, origin_transformed.y); |
| p_10_20_transformed = rotate_90.Transform(p_10_20_transformed); |
| EXPECT_FLOAT_EQ(-20.0f, p_10_20_transformed.x); |
| EXPECT_FLOAT_EQ(10.0f, p_10_20_transformed.y); |
| |
| origin_transformed = translate_23_11.Transform(origin_transformed); |
| EXPECT_FLOAT_EQ(23.0f, origin_transformed.x); |
| EXPECT_FLOAT_EQ(11.0f, origin_transformed.y); |
| p_10_20_transformed = translate_23_11.Transform(p_10_20_transformed); |
| EXPECT_FLOAT_EQ(3.0f, p_10_20_transformed.x); |
| EXPECT_FLOAT_EQ(21.0f, p_10_20_transformed.y); |
| |
| origin_transformed = scale_5_13.Transform(origin_transformed); |
| EXPECT_FLOAT_EQ(115.0f, origin_transformed.x); |
| EXPECT_FLOAT_EQ(143.0f, origin_transformed.y); |
| p_10_20_transformed = scale_5_13.Transform(p_10_20_transformed); |
| EXPECT_FLOAT_EQ(15.0f, p_10_20_transformed.x); |
| EXPECT_FLOAT_EQ(273.0f, p_10_20_transformed.y); |
| |
| // Apply the transforms to points in the reverse order. |
| origin_transformed = CFX_PointF(0, 0); |
| p_10_20_transformed = CFX_PointF(10, 20); |
| |
| origin_transformed = scale_5_13.Transform(origin_transformed); |
| EXPECT_FLOAT_EQ(0.0f, origin_transformed.x); |
| EXPECT_FLOAT_EQ(0.0f, origin_transformed.y); |
| p_10_20_transformed = scale_5_13.Transform(p_10_20_transformed); |
| EXPECT_FLOAT_EQ(50.0f, p_10_20_transformed.x); |
| EXPECT_FLOAT_EQ(260.0f, p_10_20_transformed.y); |
| |
| origin_transformed = translate_23_11.Transform(origin_transformed); |
| EXPECT_FLOAT_EQ(23.0f, origin_transformed.x); |
| EXPECT_FLOAT_EQ(11.0f, origin_transformed.y); |
| p_10_20_transformed = translate_23_11.Transform(p_10_20_transformed); |
| EXPECT_FLOAT_EQ(73.0f, p_10_20_transformed.x); |
| EXPECT_FLOAT_EQ(271.0f, p_10_20_transformed.y); |
| |
| origin_transformed = rotate_90.Transform(origin_transformed); |
| EXPECT_FLOAT_EQ(-11.0f, origin_transformed.x); |
| EXPECT_FLOAT_EQ(23.0f, origin_transformed.y); |
| p_10_20_transformed = rotate_90.Transform(p_10_20_transformed); |
| EXPECT_FLOAT_EQ(-271.0f, p_10_20_transformed.x); |
| EXPECT_FLOAT_EQ(73.0f, p_10_20_transformed.y); |
| |
| // Compose all transforms. |
| CFX_Matrix m; |
| m.Concat(rotate_90); |
| m.Concat(translate_23_11); |
| m.Concat(scale_5_13); |
| EXPECT_NEAR_FIVE_PLACES(0.0f, m.a); |
| EXPECT_NEAR_FIVE_PLACES(13.0f, m.b); |
| EXPECT_NEAR_FIVE_PLACES(-5.0f, m.c); |
| EXPECT_NEAR_FIVE_PLACES(0.0f, m.d); |
| EXPECT_FLOAT_EQ(115.0, m.e); |
| EXPECT_FLOAT_EQ(143.0, m.f); |
| |
| // Note how the results using the combined matrix are equal to the results |
| // when applying the three original matrices step-by-step. |
| origin_transformed = m.Transform(CFX_PointF(0, 0)); |
| EXPECT_FLOAT_EQ(115.0f, origin_transformed.x); |
| EXPECT_FLOAT_EQ(143.0f, origin_transformed.y); |
| |
| p_10_20_transformed = m.Transform(CFX_PointF(10, 20)); |
| EXPECT_FLOAT_EQ(15.0f, p_10_20_transformed.x); |
| EXPECT_FLOAT_EQ(273.0f, p_10_20_transformed.y); |
| |
| // Now compose all transforms prepending. |
| m = CFX_Matrix(); |
| m = rotate_90 * m; |
| m = translate_23_11 * m; |
| m = scale_5_13 * m; |
| EXPECT_NEAR_FIVE_PLACES(0.0f, m.a); |
| EXPECT_NEAR_FIVE_PLACES(5.0f, m.b); |
| EXPECT_NEAR_FIVE_PLACES(-13.0f, m.c); |
| EXPECT_NEAR_FIVE_PLACES(0.0f, m.d); |
| EXPECT_FLOAT_EQ(-11.0, m.e); |
| EXPECT_FLOAT_EQ(23.0, m.f); |
| |
| // Note how the results using the combined matrix are equal to the results |
| // when applying the three original matrices step-by-step in the reverse |
| // order. |
| origin_transformed = m.Transform(CFX_PointF(0, 0)); |
| EXPECT_FLOAT_EQ(-11.0f, origin_transformed.x); |
| EXPECT_FLOAT_EQ(23.0f, origin_transformed.y); |
| |
| p_10_20_transformed = m.Transform(CFX_PointF(10, 20)); |
| EXPECT_FLOAT_EQ(-271.0f, p_10_20_transformed.x); |
| EXPECT_FLOAT_EQ(73.0f, p_10_20_transformed.y); |
| } |
| |
| TEST(CFX_Matrix, TransformRectForRectF) { |
| CFX_Matrix rotate_90; |
| rotate_90.Rotate(FX_PI / 2); |
| |
| CFX_Matrix scale_5_13; |
| scale_5_13.Scale(5, 13); |
| |
| CFX_RectF rect(10.5f, 20.5f, 4.25f, 3.25f); |
| rect = rotate_90.TransformRect(rect); |
| EXPECT_FLOAT_EQ(-23.75f, rect.Left()); |
| EXPECT_FLOAT_EQ(10.5f, rect.Top()); |
| EXPECT_FLOAT_EQ(3.25f, rect.Width()); |
| EXPECT_FLOAT_EQ(4.25f, rect.Height()); |
| |
| rect = scale_5_13.TransformRect(rect); |
| EXPECT_FLOAT_EQ(-118.75f, rect.Left()); |
| EXPECT_FLOAT_EQ(136.5f, rect.Top()); |
| EXPECT_FLOAT_EQ(16.25f, rect.Width()); |
| EXPECT_FLOAT_EQ(55.25f, rect.Height()); |
| } |
| |
| TEST(CFX_Matrix, TransformRectForFloatRect) { |
| CFX_Matrix rotate_90; |
| rotate_90.Rotate(FX_PI / 2); |
| |
| CFX_Matrix scale_5_13; |
| scale_5_13.Scale(5, 13); |
| |
| CFX_FloatRect rect(5.5f, 0.0f, 12.25f, 2.7f); |
| rect = rotate_90.TransformRect(rect); |
| EXPECT_FLOAT_EQ(-2.7f, rect.Left()); |
| EXPECT_FLOAT_EQ(5.5f, rect.Bottom()); |
| EXPECT_NEAR(0.0f, rect.Right(), 0.00001f); |
| EXPECT_FLOAT_EQ(12.25f, rect.Top()); |
| |
| rect = scale_5_13.TransformRect(rect); |
| EXPECT_FLOAT_EQ(-13.5f, rect.Left()); |
| EXPECT_FLOAT_EQ(71.5f, rect.Bottom()); |
| EXPECT_NEAR(0.0f, rect.Right(), 0.00001f); |
| EXPECT_FLOAT_EQ(159.25f, rect.Top()); |
| } |