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skia2/tests/ColorSpaceTest.cpp
Brian Osman cca8c6fa47 SkColorSpace cleanup 
Remove SkColorSpace_XYZ, no need for an interface with one
implementation.

Change-Id: I47a23293334b5e02a6e5af8356b3df0262f86d5a
Reviewed-on: https://skia-review.googlesource.com/150138
Commit-Queue: Brian Osman <brianosman@google.com>
Reviewed-by: Mike Klein <mtklein@google.com>
2018-09-04 15:48:02 +00:00

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/*
* Copyright 2016 Google Inc.
*
* Use of this source code is governed by a BSD-style license that can be
* found in the LICENSE file.
*/
#include "Resources.h"
#include "SkCodec.h"
#include "SkColorSpace.h"
#include "SkColorSpacePriv.h"
#include "SkData.h"
#include "SkImageInfo.h"
#include "SkMatrix44.h"
#include "SkRefCnt.h"
#include "SkStream.h"
#include "SkTypes.h"
#include "Test.h"
#include "png.h"
#include "../third_party/skcms/skcms.h"
#include <memory>
#include <utility>
static bool almost_equal(float a, float b) {
return SkTAbs(a - b) < 0.001f;
}
static void test_space(skiatest::Reporter* r, SkColorSpace* space,
const float red[], const float green[], const float blue[],
const SkGammaNamed expectedGamma) {
REPORTER_ASSERT(r, nullptr != space);
REPORTER_ASSERT(r, expectedGamma == space->gammaNamed());
const SkMatrix44& mat = *space->toXYZD50();
const float src[] = {
1, 0, 0, 1,
0, 1, 0, 1,
0, 0, 1, 1,
};
const float* ref[3] = { red, green, blue };
float dst[4];
for (int i = 0; i < 3; ++i) {
mat.mapScalars(&src[i*4], dst);
REPORTER_ASSERT(r, almost_equal(ref[i][0], dst[0]));
REPORTER_ASSERT(r, almost_equal(ref[i][1], dst[1]));
REPORTER_ASSERT(r, almost_equal(ref[i][2], dst[2]));
}
}
static void test_path(skiatest::Reporter* r, const char* path,
const float red[], const float green[], const float blue[],
const SkGammaNamed expectedGamma) {
std::unique_ptr<SkStream> stream(GetResourceAsStream(path));
REPORTER_ASSERT(r, nullptr != stream);
if (!stream) {
return;
}
std::unique_ptr<SkCodec> codec(SkCodec::MakeFromStream(std::move(stream)));
REPORTER_ASSERT(r, nullptr != codec);
if (!codec) {
return;
}
SkColorSpace* colorSpace = codec->getInfo().colorSpace();
test_space(r, colorSpace, red, green, blue, expectedGamma);
}
static constexpr float g_sRGB_XYZ[]{
0.4358f, 0.3853f, 0.1430f, // Rx, Gx, Bx
0.2224f, 0.7170f, 0.0606f, // Ry, Gy, Gz
0.0139f, 0.0971f, 0.7139f, // Rz, Gz, Bz
};
static constexpr float g_sRGB_R[]{ 0.4358f, 0.2224f, 0.0139f };
static constexpr float g_sRGB_G[]{ 0.3853f, 0.7170f, 0.0971f };
static constexpr float g_sRGB_B[]{ 0.1430f, 0.0606f, 0.7139f };
DEF_TEST(ColorSpace_sRGB, r) {
test_space(r, sk_srgb_singleton(),
g_sRGB_R, g_sRGB_G, g_sRGB_B, kSRGB_SkGammaNamed);
}
DEF_TEST(ColorSpaceParseICCProfiles, r) {
#if (PNG_LIBPNG_VER_MAJOR > 1) || (PNG_LIBPNG_VER_MAJOR == 1 && PNG_LIBPNG_VER_MINOR >= 6)
test_path(r, "images/color_wheel_with_profile.png", g_sRGB_R, g_sRGB_G, g_sRGB_B,
kSRGB_SkGammaNamed);
#endif
const float red[] = { 0.385117f, 0.716904f, 0.0970612f };
const float green[] = { 0.143051f, 0.0606079f, 0.713913f };
const float blue[] = { 0.436035f, 0.222488f, 0.013916f };
test_path(r, "images/icc-v2-gbr.jpg", red, green, blue, k2Dot2Curve_SkGammaNamed);
test_path(r, "images/webp-color-profile-crash.webp",
red, green, blue, kNonStandard_SkGammaNamed);
test_path(r, "images/webp-color-profile-lossless.webp",
red, green, blue, kNonStandard_SkGammaNamed);
test_path(r, "images/webp-color-profile-lossy.webp",
red, green, blue, kNonStandard_SkGammaNamed);
test_path(r, "images/webp-color-profile-lossy-alpha.webp",
red, green, blue, kNonStandard_SkGammaNamed);
}
DEF_TEST(ColorSpaceSRGBCompare, r) {
// Create an sRGB color space by name
sk_sp<SkColorSpace> namedColorSpace = SkColorSpace::MakeSRGB();
// Create an sRGB color space by value
SkMatrix44 srgbToxyzD50(SkMatrix44::kUninitialized_Constructor);
srgbToxyzD50.set3x3RowMajorf(g_sRGB_XYZ);
sk_sp<SkColorSpace> rgbColorSpace =
SkColorSpace::MakeRGB(SkColorSpace::kSRGB_RenderTargetGamma, srgbToxyzD50);
REPORTER_ASSERT(r, rgbColorSpace == namedColorSpace);
SkColorSpaceTransferFn srgbFn;
srgbFn.fA = (1.0f / 1.055f);
srgbFn.fB = (0.055f / 1.055f);
srgbFn.fC = (1.0f / 12.92f);
srgbFn.fD = 0.04045f;
srgbFn.fE = 0.0f;
srgbFn.fF = 0.0f;
srgbFn.fG = 2.4f;
sk_sp<SkColorSpace> rgbColorSpace2 = SkColorSpace::MakeRGB(srgbFn, srgbToxyzD50);
REPORTER_ASSERT(r, rgbColorSpace2 == namedColorSpace);
// Change a single value from the sRGB matrix
srgbToxyzD50.set(2, 2, 0.5f);
sk_sp<SkColorSpace> strangeColorSpace =
SkColorSpace::MakeRGB(SkColorSpace::kSRGB_RenderTargetGamma, srgbToxyzD50);
REPORTER_ASSERT(r, strangeColorSpace != namedColorSpace);
}
DEF_TEST(ColorSpaceSRGBLinearCompare, r) {
// Create the linear sRGB color space by name
sk_sp<SkColorSpace> namedColorSpace = SkColorSpace::MakeSRGBLinear();
// Create the linear sRGB color space via the sRGB color space's makeLinearGamma()
auto srgb = SkColorSpace::MakeSRGB();
sk_sp<SkColorSpace> viaSrgbColorSpace = srgb->makeLinearGamma();
REPORTER_ASSERT(r, namedColorSpace == viaSrgbColorSpace);
// Create a linear sRGB color space by value
SkMatrix44 srgbToxyzD50(SkMatrix44::kUninitialized_Constructor);
srgbToxyzD50.set3x3RowMajorf(g_sRGB_XYZ);
sk_sp<SkColorSpace> rgbColorSpace =
SkColorSpace::MakeRGB(SkColorSpace::kLinear_RenderTargetGamma, srgbToxyzD50);
REPORTER_ASSERT(r, rgbColorSpace == namedColorSpace);
SkColorSpaceTransferFn linearExpFn;
linearExpFn.fA = 1.0f;
linearExpFn.fB = 0.0f;
linearExpFn.fC = 0.0f;
linearExpFn.fD = 0.0f;
linearExpFn.fE = 0.0f;
linearExpFn.fF = 0.0f;
linearExpFn.fG = 1.0f;
sk_sp<SkColorSpace> rgbColorSpace2 = SkColorSpace::MakeRGB(linearExpFn, srgbToxyzD50);
REPORTER_ASSERT(r, rgbColorSpace2 == namedColorSpace);
SkColorSpaceTransferFn linearFn;
linearFn.fA = 0.0f;
linearFn.fB = 0.0f;
linearFn.fC = 1.0f;
linearFn.fD = 1.0f;
linearFn.fE = 0.0f;
linearFn.fF = 0.0f;
linearFn.fG = 0.0f;
sk_sp<SkColorSpace> rgbColorSpace3 = SkColorSpace::MakeRGB(linearFn, srgbToxyzD50);
REPORTER_ASSERT(r, rgbColorSpace3 == namedColorSpace);
// Change a single value from the sRGB matrix
srgbToxyzD50.set(2, 2, 0.5f);
sk_sp<SkColorSpace> strangeColorSpace =
SkColorSpace::MakeRGB(SkColorSpace::kLinear_RenderTargetGamma, srgbToxyzD50);
REPORTER_ASSERT(r, strangeColorSpace != namedColorSpace);
}
static void test_serialize(skiatest::Reporter* r, sk_sp<SkColorSpace> space, bool isNamed) {
sk_sp<SkData> data1 = space->serialize();
size_t bytes = space->writeToMemory(nullptr);
sk_sp<SkData> data2 = SkData::MakeUninitialized(bytes);
space->writeToMemory(data2->writable_data());
sk_sp<SkColorSpace> newSpace1 = SkColorSpace::Deserialize(data1->data(), data1->size());
sk_sp<SkColorSpace> newSpace2 = SkColorSpace::Deserialize(data2->data(), data2->size());
if (isNamed) {
REPORTER_ASSERT(r, space.get() == newSpace1.get());
REPORTER_ASSERT(r, space.get() == newSpace2.get());
} else {
REPORTER_ASSERT(r, SkColorSpace::Equals(space.get(), newSpace1.get()));
REPORTER_ASSERT(r, SkColorSpace::Equals(space.get(), newSpace2.get()));
}
}
DEF_TEST(ColorSpace_Serialize, r) {
test_serialize(r, SkColorSpace::MakeSRGB(), true);
test_serialize(r, SkColorSpace::MakeSRGBLinear(), true);
auto test = [&](const char* path) {
sk_sp<SkData> data = GetResourceAsData(path);
skcms_ICCProfile profile;
REPORTER_ASSERT(r, skcms_Parse(data->data(), data->size(), &profile));
sk_sp<SkColorSpace> space = SkColorSpace::Make(profile);
REPORTER_ASSERT(r, space);
test_serialize(r, space, false);
};
test("icc_profiles/HP_ZR30w.icc");
test("icc_profiles/HP_Z32x.icc");
SkColorSpaceTransferFn fn;
fn.fA = 1.0f;
fn.fB = 0.0f;
fn.fC = 1.0f;
fn.fD = 0.5f;
fn.fE = 0.0f;
fn.fF = 0.0f;
fn.fG = 1.0f;
SkMatrix44 toXYZ(SkMatrix44::kIdentity_Constructor);
test_serialize(r, SkColorSpace::MakeRGB(fn, toXYZ), false);
}
DEF_TEST(ColorSpace_Equals, r) {
sk_sp<SkColorSpace> srgb = SkColorSpace::MakeSRGB();
auto parse = [&](const char* path) {
sk_sp<SkData> data = GetResourceAsData(path);
skcms_ICCProfile profile;
REPORTER_ASSERT(r, skcms_Parse(data->data(), data->size(), &profile));
sk_sp<SkColorSpace> space = SkColorSpace::Make(profile);
REPORTER_ASSERT(r, space);
return space;
};
sk_sp<SkColorSpace> z30 = parse("icc_profiles/HP_ZR30w.icc");
sk_sp<SkColorSpace> z32 = parse("icc_profiles/HP_Z32x.icc");
SkColorSpaceTransferFn fn;
fn.fA = 1.0f;
fn.fB = 0.0f;
fn.fC = 1.0f;
fn.fD = 0.5f;
fn.fE = 0.0f;
fn.fF = 0.0f;
fn.fG = 1.0f;
SkMatrix44 toXYZ(SkMatrix44::kIdentity_Constructor);
sk_sp<SkColorSpace> rgb4 = SkColorSpace::MakeRGB(fn, toXYZ);
REPORTER_ASSERT(r, SkColorSpace::Equals(nullptr, nullptr));
REPORTER_ASSERT(r, SkColorSpace::Equals(srgb.get(), srgb.get()));
REPORTER_ASSERT(r, SkColorSpace::Equals(z30.get(), z30.get()));
REPORTER_ASSERT(r, SkColorSpace::Equals(z32.get(), z32.get()));
REPORTER_ASSERT(r, SkColorSpace::Equals(rgb4.get(), rgb4.get()));
REPORTER_ASSERT(r, !SkColorSpace::Equals(nullptr, srgb.get()));
REPORTER_ASSERT(r, !SkColorSpace::Equals(srgb.get(), nullptr));
REPORTER_ASSERT(r, !SkColorSpace::Equals(z30.get(), srgb.get()));
REPORTER_ASSERT(r, !SkColorSpace::Equals(z32.get(), z30.get()));
REPORTER_ASSERT(r, !SkColorSpace::Equals(z30.get(), rgb4.get()));
REPORTER_ASSERT(r, !SkColorSpace::Equals(srgb.get(), rgb4.get()));
}
static inline bool matrix_almost_equal(const SkMatrix44& a, const SkMatrix44& b) {
return almost_equal(a.get(0, 0), b.get(0, 0)) &&
almost_equal(a.get(0, 1), b.get(0, 1)) &&
almost_equal(a.get(0, 2), b.get(0, 2)) &&
almost_equal(a.get(0, 3), b.get(0, 3)) &&
almost_equal(a.get(1, 0), b.get(1, 0)) &&
almost_equal(a.get(1, 1), b.get(1, 1)) &&
almost_equal(a.get(1, 2), b.get(1, 2)) &&
almost_equal(a.get(1, 3), b.get(1, 3)) &&
almost_equal(a.get(2, 0), b.get(2, 0)) &&
almost_equal(a.get(2, 1), b.get(2, 1)) &&
almost_equal(a.get(2, 2), b.get(2, 2)) &&
almost_equal(a.get(2, 3), b.get(2, 3)) &&
almost_equal(a.get(3, 0), b.get(3, 0)) &&
almost_equal(a.get(3, 1), b.get(3, 1)) &&
almost_equal(a.get(3, 2), b.get(3, 2)) &&
almost_equal(a.get(3, 3), b.get(3, 3));
}
static inline void check_primaries(skiatest::Reporter* r, const SkColorSpacePrimaries& primaries,
const SkMatrix44& reference) {
SkMatrix44 toXYZ(SkMatrix44::kUninitialized_Constructor);
bool result = primaries.toXYZD50(&toXYZ);
REPORTER_ASSERT(r, result);
REPORTER_ASSERT(r, matrix_almost_equal(toXYZ, reference));
}
DEF_TEST(ColorSpace_Primaries, r) {
// sRGB primaries (D65)
SkColorSpacePrimaries srgb;
srgb.fRX = 0.64f;
srgb.fRY = 0.33f;
srgb.fGX = 0.30f;
srgb.fGY = 0.60f;
srgb.fBX = 0.15f;
srgb.fBY = 0.06f;
srgb.fWX = 0.3127f;
srgb.fWY = 0.3290f;
SkMatrix44 srgbToXYZ(SkMatrix44::kUninitialized_Constructor);
bool result = srgb.toXYZD50(&srgbToXYZ);
REPORTER_ASSERT(r, result);
sk_sp<SkColorSpace> space = SkColorSpace::MakeRGB(SkColorSpace::kSRGB_RenderTargetGamma,
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;
SkMatrix44 proToXYZ(SkMatrix44::kUninitialized_Constructor);
proToXYZ.set3x3(0.7976749f, 0.2880402f, 0.0000000f,
0.1351917f, 0.7118741f, 0.0000000f,
0.0313534f, 0.0000857f, 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;
SkMatrix44 ntscToXYZ(SkMatrix44::kUninitialized_Constructor);
ntscToXYZ.set3x3(0.6343706f, 0.3109496f, -0.0011817f,
0.1852204f, 0.5915984f, 0.0555518f,
0.1446290f, 0.0974520f, 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(SkColorSpace::kSRGB_RenderTargetGamma,
SkColorSpace::kDCIP3_D65_Gamut);
SkMatrix44 reference(SkMatrix44::kUninitialized_Constructor);
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(SkColorSpace::kSRGB_RenderTargetGamma,
SkColorSpace::kRec2020_Gamut);
SkAssertResult(space->toXYZD50(&reference));
check_primaries(r, rec2020, reference);
}
DEF_TEST(ColorSpace_MatrixHash, r) {
sk_sp<SkColorSpace> srgb = SkColorSpace::MakeSRGB();
SkColorSpaceTransferFn fn;
fn.fA = 1.0f;
fn.fB = 0.0f;
fn.fC = 0.0f;
fn.fD = 0.0f;
fn.fE = 0.0f;
fn.fF = 0.0f;
fn.fG = 3.0f;
SkMatrix44 srgbMat(SkMatrix44::kUninitialized_Constructor);
srgbMat.set3x3RowMajorf(gSRGB_toXYZD50);
sk_sp<SkColorSpace> strange = SkColorSpace::MakeRGB(fn, srgbMat);
REPORTER_ASSERT(r, *srgb->toXYZD50() == *strange->toXYZD50());
REPORTER_ASSERT(r, srgb->toXYZD50Hash() == strange->toXYZD50Hash());
}
DEF_TEST(ColorSpace_IsSRGB, r) {
sk_sp<SkColorSpace> srgb0 = SkColorSpace::MakeSRGB();
SkColorSpaceTransferFn fn;
fn.fA = 1.0f;
fn.fB = 0.0f;
fn.fC = 0.0f;
fn.fD = 0.0f;
fn.fE = 0.0f;
fn.fF = 0.0f;
fn.fG = 2.2f;
sk_sp<SkColorSpace> twoDotTwo = SkColorSpace::MakeRGB(fn, SkColorSpace::kSRGB_Gamut);
REPORTER_ASSERT(r, srgb0->isSRGB());
REPORTER_ASSERT(r, !twoDotTwo->isSRGB());
}
DEF_TEST(ColorSpace_skcms_IsSRGB, r) {
sk_sp<SkColorSpace> srgb = SkColorSpace::Make(*skcms_sRGB_profile());
REPORTER_ASSERT(r, srgb->isSRGB());
}
DEF_TEST(ColorSpace_skcms_sRGB_exact, r) {
skcms_ICCProfile profile;
sk_srgb_singleton()->toProfile(&profile);
REPORTER_ASSERT(r, 0 == memcmp(&profile, skcms_sRGB_profile(), sizeof(skcms_ICCProfile)));
}
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