| // Copyright 2022 The Chromium Authors |
| // Use of this source code is governed by a BSD-style license that can be |
| // found in the LICENSE file. |
| |
| #include "skia/ext/skcolorspace_primaries.h" |
| |
| #include "testing/gtest/include/gtest/gtest.h" |
| |
| namespace skia { |
| namespace { |
| |
| constexpr float kEpsilon = 0.0001; |
| |
| TEST(SkiaUtils, PrimariesD65) { |
| // DCI P3 (D65) |
| const auto p3 = kSkColorSpacePrimariesP3; |
| |
| skcms_Matrix3x3 matrix; |
| EXPECT_TRUE(p3.toXYZD50(&matrix)); |
| const auto primaries_from_matrix = GetD65PrimariesFromToXYZD50Matrix(matrix); |
| |
| // The retrieved primaries from the matrix should be the same as the original |
| // primaries, because the original primaries had a D65 white point. |
| EXPECT_NEAR(p3.fRX, primaries_from_matrix.fRX, kEpsilon); |
| EXPECT_NEAR(p3.fRY, primaries_from_matrix.fRY, kEpsilon); |
| EXPECT_NEAR(p3.fGX, primaries_from_matrix.fGX, kEpsilon); |
| EXPECT_NEAR(p3.fGY, primaries_from_matrix.fGY, kEpsilon); |
| EXPECT_NEAR(p3.fBX, primaries_from_matrix.fBX, kEpsilon); |
| EXPECT_NEAR(p3.fBY, primaries_from_matrix.fBY, kEpsilon); |
| EXPECT_NEAR(p3.fWX, primaries_from_matrix.fWX, kEpsilon); |
| EXPECT_NEAR(p3.fWY, primaries_from_matrix.fWY, kEpsilon); |
| } |
| |
| TEST(SkiaUtils, PrimariesD50) { |
| // ProPhoto (D50) |
| const auto pro_photo = kSkColorSpacePrimariesProPhotoD50; |
| |
| // Convert primaries to a matrix. |
| skcms_Matrix3x3 pro_photo_matrix; |
| EXPECT_TRUE(pro_photo.toXYZD50(&pro_photo_matrix)); |
| |
| // The convert the matrix back to primaries with a D65 white point. |
| const auto d65 = GetD65PrimariesFromToXYZD50Matrix(pro_photo_matrix); |
| |
| // And then convert the D65 primaries to a matrix. |
| skcms_Matrix3x3 d65_matrix; |
| EXPECT_TRUE(d65.toXYZD50(&d65_matrix)); |
| |
| // The two matrices should be the same, but the primaries will not be. |
| EXPECT_FALSE(pro_photo == d65); |
| for (size_t i = 0; i < 3; ++i) { |
| for (size_t j = 0; j < 3; ++j) { |
| EXPECT_NEAR(pro_photo_matrix.vals[i][j], d65_matrix.vals[i][j], kEpsilon); |
| } |
| } |
| } |
| |
| } // namespace |
| } // namespace skia |