DEF_TEST(ColorSpace_Primaries, r) {
// sRGB primaries (D65)
skcms_Matrix3x3 srgbToXYZ;
bool result = skcms_PrimariesToXYZD50(
0.64f, 0.33f,
0.30f, 0.60f,
0.15f, 0.06f,
0.3127f, 0.3290f,
&srgbToXYZ);
REPORTER_ASSERT(r, result);
sk_sp<SkColorSpace> space = SkColorSpace::MakeRGB(SkNamedTransferFn::kSRGB, srgbToXYZ);
REPORTER_ASSERT(r, SkColorSpace::MakeSRGB() == space);
// ProPhoto (D50)
SkColorSpacePrimaries proPhoto;
proPhoto.fRX = 0.7347f;
proPhoto.fRY = 0.2653f;
proPhoto.fGX = 0.1596f;
proPhoto.fGY = 0.8404f;
proPhoto.fBX = 0.0366f;
proPhoto.fBY = 0.0001f;
proPhoto.fWX = 0.34567f;
proPhoto.fWY = 0.35850f;
skcms_Matrix3x3 proToXYZ = {{
{ 0.7976749f, 0.1351917f, 0.0313534f },
{ 0.2880402f, 0.7118741f, 0.0000857f },
{ 0.0000000f, 0.0000000f, 0.8252100f },
}};
check_primaries(r, proPhoto, proToXYZ);
// NTSC (C)
SkColorSpacePrimaries ntsc;
ntsc.fRX = 0.67f;
ntsc.fRY = 0.33f;
ntsc.fGX = 0.21f;
ntsc.fGY = 0.71f;
ntsc.fBX = 0.14f;
ntsc.fBY = 0.08f;
ntsc.fWX = 0.31006f;
ntsc.fWY = 0.31616f;
skcms_Matrix3x3 ntscToXYZ = {{
{ 0.6343706f, 0.1852204f, 0.1446290f },
{ 0.3109496f, 0.5915984f, 0.0974520f },
{ -0.0011817f, 0.0555518f, 0.7708399f }
}};
check_primaries(r, ntsc, ntscToXYZ);
// DCI P3 (D65)
SkColorSpacePrimaries p3;
p3.fRX = 0.680f;
p3.fRY = 0.320f;
p3.fGX = 0.265f;
p3.fGY = 0.690f;
p3.fBX = 0.150f;
p3.fBY = 0.060f;
p3.fWX = 0.3127f;
p3.fWY = 0.3290f;
space = SkColorSpace::MakeRGB(SkNamedTransferFn::kSRGB, SkNamedGamut::kDCIP3);
skcms_Matrix3x3 reference;
SkAssertResult(space->toXYZD50(&reference));
check_primaries(r, p3, reference);
// Rec 2020 (D65)
SkColorSpacePrimaries rec2020;
rec2020.fRX = 0.708f;
rec2020.fRY = 0.292f;
rec2020.fGX = 0.170f;
rec2020.fGY = 0.797f;
rec2020.fBX = 0.131f;
rec2020.fBY = 0.046f;
rec2020.fWX = 0.3127f;
rec2020.fWY = 0.3290f;
space = SkColorSpace::MakeRGB(SkNamedTransferFn::kSRGB, SkNamedGamut::kRec2020);
SkAssertResult(space->toXYZD50(&reference));
check_primaries(r, rec2020, reference);
}
bool SkColorSpacePrimaries::toXYZD50(skcms_Matrix3x3* toXYZ_D50) const {
return skcms_PrimariesToXYZD50(fRX, fRY, fGX, fGY, fBX, fBY, fWX, fWY, toXYZ_D50);
}