1 /*
2 * Copyright 2016 Google Inc.
3 *
4 * Use of this source code is governed by a BSD-style license that can be
5 * found in the LICENSE file.
6 */
7
8 #include "Resources.h"
9 #include "SkCodec.h"
10 #include "SkColorSpace.h"
11 #include "SkColorSpace_XYZ.h"
12 #include "SkColorSpacePriv.h"
13 #include "Test.h"
14
15 #include "png.h"
16
almost_equal(float a,float b)17 static bool almost_equal(float a, float b) {
18 return SkTAbs(a - b) < 0.001f;
19 }
20
test_space(skiatest::Reporter * r,SkColorSpace * space,const float red[],const float green[],const float blue[],const SkGammaNamed expectedGamma)21 static void test_space(skiatest::Reporter* r, SkColorSpace* space,
22 const float red[], const float green[], const float blue[],
23 const SkGammaNamed expectedGamma) {
24
25 REPORTER_ASSERT(r, nullptr != space);
26 REPORTER_ASSERT(r, expectedGamma == space->gammaNamed());
27
28 const SkMatrix44& mat = *space->toXYZD50();
29 const float src[] = {
30 1, 0, 0, 1,
31 0, 1, 0, 1,
32 0, 0, 1, 1,
33 };
34 const float* ref[3] = { red, green, blue };
35 float dst[4];
36 for (int i = 0; i < 3; ++i) {
37 mat.mapScalars(&src[i*4], dst);
38 REPORTER_ASSERT(r, almost_equal(ref[i][0], dst[0]));
39 REPORTER_ASSERT(r, almost_equal(ref[i][1], dst[1]));
40 REPORTER_ASSERT(r, almost_equal(ref[i][2], dst[2]));
41 }
42 }
43
test_path(skiatest::Reporter * r,const char * path,const float red[],const float green[],const float blue[],const SkGammaNamed expectedGamma)44 static void test_path(skiatest::Reporter* r, const char* path,
45 const float red[], const float green[], const float blue[],
46 const SkGammaNamed expectedGamma) {
47 std::unique_ptr<SkStream> stream(GetResourceAsStream(path));
48 REPORTER_ASSERT(r, nullptr != stream);
49 if (!stream) {
50 return;
51 }
52
53 std::unique_ptr<SkCodec> codec(SkCodec::MakeFromStream(std::move(stream)));
54 REPORTER_ASSERT(r, nullptr != codec);
55 if (!codec) {
56 return;
57 }
58
59 SkColorSpace* colorSpace = codec->getInfo().colorSpace();
60 test_space(r, colorSpace, red, green, blue, expectedGamma);
61 }
62
63 static constexpr float g_sRGB_XYZ[]{
64 0.4358f, 0.3853f, 0.1430f, // Rx, Gx, Bx
65 0.2224f, 0.7170f, 0.0606f, // Ry, Gy, Gz
66 0.0139f, 0.0971f, 0.7139f, // Rz, Gz, Bz
67 };
68
69 static constexpr float g_sRGB_R[]{ 0.4358f, 0.2224f, 0.0139f };
70 static constexpr float g_sRGB_G[]{ 0.3853f, 0.7170f, 0.0971f };
71 static constexpr float g_sRGB_B[]{ 0.1430f, 0.0606f, 0.7139f };
72
DEF_TEST(ColorSpace_sRGB,r)73 DEF_TEST(ColorSpace_sRGB, r) {
74 test_space(r, SkColorSpace::MakeSRGB().get(),
75 g_sRGB_R, g_sRGB_G, g_sRGB_B, kSRGB_SkGammaNamed);
76
77 }
78
DEF_TEST(ColorSpaceParseICCProfiles,r)79 DEF_TEST(ColorSpaceParseICCProfiles, r) {
80
81 #if (PNG_LIBPNG_VER_MAJOR > 1) || (PNG_LIBPNG_VER_MAJOR == 1 && PNG_LIBPNG_VER_MINOR >= 6)
82 test_path(r, "images/color_wheel_with_profile.png", g_sRGB_R, g_sRGB_G, g_sRGB_B,
83 kSRGB_SkGammaNamed);
84 #endif
85
86 const float red[] = { 0.385117f, 0.716904f, 0.0970612f };
87 const float green[] = { 0.143051f, 0.0606079f, 0.713913f };
88 const float blue[] = { 0.436035f, 0.222488f, 0.013916f };
89 test_path(r, "images/icc-v2-gbr.jpg", red, green, blue, k2Dot2Curve_SkGammaNamed);
90
91 test_path(r, "images/webp-color-profile-crash.webp",
92 red, green, blue, kNonStandard_SkGammaNamed);
93 test_path(r, "images/webp-color-profile-lossless.webp",
94 red, green, blue, kNonStandard_SkGammaNamed);
95 test_path(r, "images/webp-color-profile-lossy.webp",
96 red, green, blue, kNonStandard_SkGammaNamed);
97 test_path(r, "images/webp-color-profile-lossy-alpha.webp",
98 red, green, blue, kNonStandard_SkGammaNamed);
99 }
100
DEF_TEST(ColorSpaceSRGBCompare,r)101 DEF_TEST(ColorSpaceSRGBCompare, r) {
102 // Create an sRGB color space by name
103 sk_sp<SkColorSpace> namedColorSpace = SkColorSpace::MakeSRGB();
104
105 // Create an sRGB color space by value
106 SkMatrix44 srgbToxyzD50(SkMatrix44::kUninitialized_Constructor);
107 srgbToxyzD50.set3x3RowMajorf(g_sRGB_XYZ);
108 sk_sp<SkColorSpace> rgbColorSpace =
109 SkColorSpace::MakeRGB(SkColorSpace::kSRGB_RenderTargetGamma, srgbToxyzD50);
110 REPORTER_ASSERT(r, rgbColorSpace == namedColorSpace);
111
112 SkColorSpaceTransferFn srgbFn;
113 srgbFn.fA = (1.0f / 1.055f);
114 srgbFn.fB = (0.055f / 1.055f);
115 srgbFn.fC = (1.0f / 12.92f);
116 srgbFn.fD = 0.04045f;
117 srgbFn.fE = 0.0f;
118 srgbFn.fF = 0.0f;
119 srgbFn.fG = 2.4f;
120 sk_sp<SkColorSpace> rgbColorSpace2 = SkColorSpace::MakeRGB(srgbFn, srgbToxyzD50);
121 REPORTER_ASSERT(r, rgbColorSpace2 == namedColorSpace);
122
123 // Change a single value from the sRGB matrix
124 srgbToxyzD50.set(2, 2, 0.5f);
125 sk_sp<SkColorSpace> strangeColorSpace =
126 SkColorSpace::MakeRGB(SkColorSpace::kSRGB_RenderTargetGamma, srgbToxyzD50);
127 REPORTER_ASSERT(r, strangeColorSpace != namedColorSpace);
128 }
129
DEF_TEST(ColorSpaceSRGBLinearCompare,r)130 DEF_TEST(ColorSpaceSRGBLinearCompare, r) {
131 // Create the linear sRGB color space by name
132 sk_sp<SkColorSpace> namedColorSpace = SkColorSpace::MakeSRGBLinear();
133
134 // Create the linear sRGB color space via the sRGB color space's makeLinearGamma()
135 auto srgb = SkColorSpace::MakeSRGB();
136 auto srgbXYZ = static_cast<SkColorSpace_XYZ*>(srgb.get());
137 sk_sp<SkColorSpace> viaSrgbColorSpace = srgbXYZ->makeLinearGamma();
138 REPORTER_ASSERT(r, namedColorSpace == viaSrgbColorSpace);
139
140 // Create a linear sRGB color space by value
141 SkMatrix44 srgbToxyzD50(SkMatrix44::kUninitialized_Constructor);
142 srgbToxyzD50.set3x3RowMajorf(g_sRGB_XYZ);
143 sk_sp<SkColorSpace> rgbColorSpace =
144 SkColorSpace::MakeRGB(SkColorSpace::kLinear_RenderTargetGamma, srgbToxyzD50);
145 REPORTER_ASSERT(r, rgbColorSpace == namedColorSpace);
146
147 SkColorSpaceTransferFn linearExpFn;
148 linearExpFn.fA = 1.0f;
149 linearExpFn.fB = 0.0f;
150 linearExpFn.fC = 0.0f;
151 linearExpFn.fD = 0.0f;
152 linearExpFn.fE = 0.0f;
153 linearExpFn.fF = 0.0f;
154 linearExpFn.fG = 1.0f;
155 sk_sp<SkColorSpace> rgbColorSpace2 = SkColorSpace::MakeRGB(linearExpFn, srgbToxyzD50);
156 REPORTER_ASSERT(r, rgbColorSpace2 == namedColorSpace);
157
158 SkColorSpaceTransferFn linearFn;
159 linearFn.fA = 0.0f;
160 linearFn.fB = 0.0f;
161 linearFn.fC = 1.0f;
162 linearFn.fD = 1.0f;
163 linearFn.fE = 0.0f;
164 linearFn.fF = 0.0f;
165 linearFn.fG = 0.0f;
166 sk_sp<SkColorSpace> rgbColorSpace3 = SkColorSpace::MakeRGB(linearFn, srgbToxyzD50);
167 REPORTER_ASSERT(r, rgbColorSpace3 == namedColorSpace);
168
169 // Change a single value from the sRGB matrix
170 srgbToxyzD50.set(2, 2, 0.5f);
171 sk_sp<SkColorSpace> strangeColorSpace =
172 SkColorSpace::MakeRGB(SkColorSpace::kLinear_RenderTargetGamma, srgbToxyzD50);
173 REPORTER_ASSERT(r, strangeColorSpace != namedColorSpace);
174 }
175
test_serialize(skiatest::Reporter * r,SkColorSpace * space,bool isNamed)176 static void test_serialize(skiatest::Reporter* r, SkColorSpace* space, bool isNamed) {
177 sk_sp<SkData> data1 = space->serialize();
178
179 size_t bytes = space->writeToMemory(nullptr);
180 sk_sp<SkData> data2 = SkData::MakeUninitialized(bytes);
181 space->writeToMemory(data2->writable_data());
182
183 sk_sp<SkColorSpace> newSpace1 = SkColorSpace::Deserialize(data1->data(), data1->size());
184 sk_sp<SkColorSpace> newSpace2 = SkColorSpace::Deserialize(data2->data(), data2->size());
185
186 if (isNamed) {
187 REPORTER_ASSERT(r, space == newSpace1.get());
188 REPORTER_ASSERT(r, space == newSpace2.get());
189 } else {
190 REPORTER_ASSERT(r, SkColorSpace::Equals(space, newSpace1.get()));
191 REPORTER_ASSERT(r, SkColorSpace::Equals(space, newSpace2.get()));
192 }
193 }
194
DEF_TEST(ColorSpace_Serialize,r)195 DEF_TEST(ColorSpace_Serialize, r) {
196 test_serialize(r, SkColorSpace::MakeSRGB().get(), true);
197 test_serialize(r, SkColorSpace::MakeSRGBLinear().get(), true);
198
199 sk_sp<SkData> monitorData = GetResourceAsData("icc_profiles/HP_ZR30w.icc");
200 test_serialize(r, SkColorSpace::MakeICC(monitorData->data(), monitorData->size()).get(), false);
201 monitorData = GetResourceAsData("icc_profiles/HP_Z32x.icc");
202 test_serialize(r, SkColorSpace::MakeICC(monitorData->data(), monitorData->size()).get(), false);
203 monitorData = GetResourceAsData("icc_profiles/upperLeft.icc");
204 test_serialize(r, SkColorSpace::MakeICC(monitorData->data(), monitorData->size()).get(), false);
205 monitorData = GetResourceAsData("icc_profiles/upperRight.icc");
206 test_serialize(r, SkColorSpace::MakeICC(monitorData->data(), monitorData->size()).get(), false);
207
208 SkColorSpaceTransferFn fn;
209 fn.fA = 1.0f;
210 fn.fB = 0.0f;
211 fn.fC = 1.0f;
212 fn.fD = 0.5f;
213 fn.fE = 0.0f;
214 fn.fF = 0.0f;
215 fn.fG = 1.0f;
216 SkMatrix44 toXYZ(SkMatrix44::kIdentity_Constructor);
217 test_serialize(r, SkColorSpace::MakeRGB(fn, toXYZ).get(), false);
218 }
219
DEF_TEST(ColorSpace_Equals,r)220 DEF_TEST(ColorSpace_Equals, r) {
221 sk_sp<SkColorSpace> srgb = SkColorSpace::MakeSRGB();
222 sk_sp<SkData> data = GetResourceAsData("icc_profiles/HP_ZR30w.icc");
223 sk_sp<SkColorSpace> z30 = SkColorSpace::MakeICC(data->data(), data->size());
224 data = GetResourceAsData("icc_profiles/HP_Z32x.icc");
225 sk_sp<SkColorSpace> z32 = SkColorSpace::MakeICC(data->data(), data->size());
226 data = GetResourceAsData("icc_profiles/upperLeft.icc");
227 sk_sp<SkColorSpace> upperLeft = SkColorSpace::MakeICC(data->data(), data->size());
228 data = GetResourceAsData("icc_profiles/upperRight.icc");
229 sk_sp<SkColorSpace> upperRight = SkColorSpace::MakeICC(data->data(), data->size());
230
231 SkColorSpaceTransferFn fn;
232 fn.fA = 1.0f;
233 fn.fB = 0.0f;
234 fn.fC = 1.0f;
235 fn.fD = 0.5f;
236 fn.fE = 0.0f;
237 fn.fF = 0.0f;
238 fn.fG = 1.0f;
239 SkMatrix44 toXYZ(SkMatrix44::kIdentity_Constructor);
240 sk_sp<SkColorSpace> rgb4 = SkColorSpace::MakeRGB(fn, toXYZ);
241
242 REPORTER_ASSERT(r, SkColorSpace::Equals(nullptr, nullptr));
243 REPORTER_ASSERT(r, SkColorSpace::Equals(srgb.get(), srgb.get()));
244 REPORTER_ASSERT(r, SkColorSpace::Equals(z30.get(), z30.get()));
245 REPORTER_ASSERT(r, SkColorSpace::Equals(z32.get(), z32.get()));
246 REPORTER_ASSERT(r, SkColorSpace::Equals(upperLeft.get(), upperLeft.get()));
247 REPORTER_ASSERT(r, SkColorSpace::Equals(upperRight.get(), upperRight.get()));
248 REPORTER_ASSERT(r, SkColorSpace::Equals(rgb4.get(), rgb4.get()));
249
250 REPORTER_ASSERT(r, !SkColorSpace::Equals(nullptr, srgb.get()));
251 REPORTER_ASSERT(r, !SkColorSpace::Equals(srgb.get(), nullptr));
252 REPORTER_ASSERT(r, !SkColorSpace::Equals(z30.get(), srgb.get()));
253 REPORTER_ASSERT(r, !SkColorSpace::Equals(z32.get(), z30.get()));
254 REPORTER_ASSERT(r, !SkColorSpace::Equals(upperLeft.get(), srgb.get()));
255 REPORTER_ASSERT(r, !SkColorSpace::Equals(upperLeft.get(), upperRight.get()));
256 REPORTER_ASSERT(r, !SkColorSpace::Equals(z30.get(), upperRight.get()));
257 REPORTER_ASSERT(r, !SkColorSpace::Equals(z30.get(), rgb4.get()));
258 REPORTER_ASSERT(r, !SkColorSpace::Equals(srgb.get(), rgb4.get()));
259 }
260
matrix_almost_equal(const SkMatrix44 & a,const SkMatrix44 & b)261 static inline bool matrix_almost_equal(const SkMatrix44& a, const SkMatrix44& b) {
262 return almost_equal(a.get(0, 0), b.get(0, 0)) &&
263 almost_equal(a.get(0, 1), b.get(0, 1)) &&
264 almost_equal(a.get(0, 2), b.get(0, 2)) &&
265 almost_equal(a.get(0, 3), b.get(0, 3)) &&
266 almost_equal(a.get(1, 0), b.get(1, 0)) &&
267 almost_equal(a.get(1, 1), b.get(1, 1)) &&
268 almost_equal(a.get(1, 2), b.get(1, 2)) &&
269 almost_equal(a.get(1, 3), b.get(1, 3)) &&
270 almost_equal(a.get(2, 0), b.get(2, 0)) &&
271 almost_equal(a.get(2, 1), b.get(2, 1)) &&
272 almost_equal(a.get(2, 2), b.get(2, 2)) &&
273 almost_equal(a.get(2, 3), b.get(2, 3)) &&
274 almost_equal(a.get(3, 0), b.get(3, 0)) &&
275 almost_equal(a.get(3, 1), b.get(3, 1)) &&
276 almost_equal(a.get(3, 2), b.get(3, 2)) &&
277 almost_equal(a.get(3, 3), b.get(3, 3));
278 }
279
check_primaries(skiatest::Reporter * r,const SkColorSpacePrimaries & primaries,const SkMatrix44 & reference)280 static inline void check_primaries(skiatest::Reporter* r, const SkColorSpacePrimaries& primaries,
281 const SkMatrix44& reference) {
282 SkMatrix44 toXYZ(SkMatrix44::kUninitialized_Constructor);
283 bool result = primaries.toXYZD50(&toXYZ);
284 REPORTER_ASSERT(r, result);
285 REPORTER_ASSERT(r, matrix_almost_equal(toXYZ, reference));
286 }
287
DEF_TEST(ColorSpace_Primaries,r)288 DEF_TEST(ColorSpace_Primaries, r) {
289 // sRGB primaries (D65)
290 SkColorSpacePrimaries srgb;
291 srgb.fRX = 0.64f;
292 srgb.fRY = 0.33f;
293 srgb.fGX = 0.30f;
294 srgb.fGY = 0.60f;
295 srgb.fBX = 0.15f;
296 srgb.fBY = 0.06f;
297 srgb.fWX = 0.3127f;
298 srgb.fWY = 0.3290f;
299 SkMatrix44 srgbToXYZ(SkMatrix44::kUninitialized_Constructor);
300 bool result = srgb.toXYZD50(&srgbToXYZ);
301 REPORTER_ASSERT(r, result);
302
303 sk_sp<SkColorSpace> space = SkColorSpace::MakeRGB(SkColorSpace::kSRGB_RenderTargetGamma,
304 srgbToXYZ);
305 REPORTER_ASSERT(r, SkColorSpace::MakeSRGB() == space);
306
307 // ProPhoto (D50)
308 SkColorSpacePrimaries proPhoto;
309 proPhoto.fRX = 0.7347f;
310 proPhoto.fRY = 0.2653f;
311 proPhoto.fGX = 0.1596f;
312 proPhoto.fGY = 0.8404f;
313 proPhoto.fBX = 0.0366f;
314 proPhoto.fBY = 0.0001f;
315 proPhoto.fWX = 0.34567f;
316 proPhoto.fWY = 0.35850f;
317 SkMatrix44 proToXYZ(SkMatrix44::kUninitialized_Constructor);
318 proToXYZ.set3x3(0.7976749f, 0.2880402f, 0.0000000f,
319 0.1351917f, 0.7118741f, 0.0000000f,
320 0.0313534f, 0.0000857f, 0.8252100f);
321 check_primaries(r, proPhoto, proToXYZ);
322
323 // NTSC (C)
324 SkColorSpacePrimaries ntsc;
325 ntsc.fRX = 0.67f;
326 ntsc.fRY = 0.33f;
327 ntsc.fGX = 0.21f;
328 ntsc.fGY = 0.71f;
329 ntsc.fBX = 0.14f;
330 ntsc.fBY = 0.08f;
331 ntsc.fWX = 0.31006f;
332 ntsc.fWY = 0.31616f;
333 SkMatrix44 ntscToXYZ(SkMatrix44::kUninitialized_Constructor);
334 ntscToXYZ.set3x3(0.6343706f, 0.3109496f, -0.0011817f,
335 0.1852204f, 0.5915984f, 0.0555518f,
336 0.1446290f, 0.0974520f, 0.7708399f);
337 check_primaries(r, ntsc, ntscToXYZ);
338
339 // DCI P3 (D65)
340 SkColorSpacePrimaries p3;
341 p3.fRX = 0.680f;
342 p3.fRY = 0.320f;
343 p3.fGX = 0.265f;
344 p3.fGY = 0.690f;
345 p3.fBX = 0.150f;
346 p3.fBY = 0.060f;
347 p3.fWX = 0.3127f;
348 p3.fWY = 0.3290f;
349 space = SkColorSpace::MakeRGB(SkColorSpace::kSRGB_RenderTargetGamma,
350 SkColorSpace::kDCIP3_D65_Gamut);
351 SkMatrix44 reference(SkMatrix44::kUninitialized_Constructor);
352 SkAssertResult(space->toXYZD50(&reference));
353 check_primaries(r, p3, reference);
354
355 // Rec 2020 (D65)
356 SkColorSpacePrimaries rec2020;
357 rec2020.fRX = 0.708f;
358 rec2020.fRY = 0.292f;
359 rec2020.fGX = 0.170f;
360 rec2020.fGY = 0.797f;
361 rec2020.fBX = 0.131f;
362 rec2020.fBY = 0.046f;
363 rec2020.fWX = 0.3127f;
364 rec2020.fWY = 0.3290f;
365 space = SkColorSpace::MakeRGB(SkColorSpace::kSRGB_RenderTargetGamma,
366 SkColorSpace::kRec2020_Gamut);
367 SkAssertResult(space->toXYZD50(&reference));
368 check_primaries(r, rec2020, reference);
369 }
370
DEF_TEST(ColorSpace_InvalidICC,r)371 DEF_TEST(ColorSpace_InvalidICC, r) {
372 // This color space has a matrix that is not D50.
373 sk_sp<SkData> data = GetResourceAsData("icc_profiles/SM2333SW.icc");
374 if (!data) {
375 return;
376 }
377 sk_sp<SkColorSpace> cs = SkColorSpace::MakeICC(data->data(), data->size());
378 REPORTER_ASSERT(r, !cs);
379
380 // The color space has a color lut with only one entry in each dimension.
381 data = GetResourceAsData("icc_profiles/invalid_color_lut.icc");
382 if (!data) {
383 return;
384 }
385
386 cs = SkColorSpace::MakeICC(data->data(), data->size());
387 REPORTER_ASSERT(r, !cs);
388 }
389
DEF_TEST(ColorSpace_MatrixHash,r)390 DEF_TEST(ColorSpace_MatrixHash, r) {
391 sk_sp<SkColorSpace> srgb = SkColorSpace::MakeSRGB();
392
393 SkColorSpaceTransferFn fn;
394 fn.fA = 1.0f;
395 fn.fB = 0.0f;
396 fn.fC = 0.0f;
397 fn.fD = 0.0f;
398 fn.fE = 0.0f;
399 fn.fF = 0.0f;
400 fn.fG = 3.0f;
401
402 SkMatrix44 srgbMat(SkMatrix44::kUninitialized_Constructor);
403 srgbMat.set3x3RowMajorf(gSRGB_toXYZD50);
404 sk_sp<SkColorSpace> strange = SkColorSpace::MakeRGB(fn, srgbMat);
405
406 REPORTER_ASSERT(r, *srgb->toXYZD50() == *strange->toXYZD50());
407 REPORTER_ASSERT(r, srgb->toXYZD50Hash() == strange->toXYZD50Hash());
408 }
409
DEF_TEST(ColorSpace_IsSRGB,r)410 DEF_TEST(ColorSpace_IsSRGB, r) {
411 sk_sp<SkColorSpace> srgb0 = SkColorSpace::MakeSRGB();
412
413 SkColorSpaceTransferFn fn;
414 fn.fA = 1.0f;
415 fn.fB = 0.0f;
416 fn.fC = 0.0f;
417 fn.fD = 0.0f;
418 fn.fE = 0.0f;
419 fn.fF = 0.0f;
420 fn.fG = 2.2f;
421 sk_sp<SkColorSpace> twoDotTwo = SkColorSpace::MakeRGB(fn, SkColorSpace::kSRGB_Gamut);
422
423 REPORTER_ASSERT(r, srgb0->isSRGB());
424 REPORTER_ASSERT(r, !twoDotTwo->isSRGB());
425 }
426