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      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 "SkColorSpace.h"
     10 #include "SkColorSpacePriv.h"
     11 #include "SkColorSpace_XYZ.h"
     12 #include "SkData.h"
     13 #include "SkICC.h"
     14 #include "SkICCPriv.h"
     15 #include "SkMatrix44.h"
     16 #include "SkStream.h"
     17 #include "Test.h"
     18 
     19 static bool almost_equal(float a, float b) {
     20     return SkTAbs(a - b) < 0.001f;
     21 }
     22 
     23 static inline void test_to_xyz_d50(skiatest::Reporter* r, SkICC* icc, bool shouldSucceed,
     24                                    const float* reference) {
     25     SkMatrix44 result(SkMatrix44::kUninitialized_Constructor);
     26     REPORTER_ASSERT(r, shouldSucceed == icc->toXYZD50(&result));
     27     if (shouldSucceed) {
     28         float resultVals[16];
     29         result.asColMajorf(resultVals);
     30         for (int i = 0; i < 16; i++) {
     31             REPORTER_ASSERT(r, almost_equal(resultVals[i], reference[i]));
     32         }
     33     }
     34 }
     35 
     36 DEF_TEST(ICC_ToXYZD50, r) {
     37     const float z30Reference[16] = {
     38         0.59825f, 0.27103f, 0.00603f, 0.0f, 0.22243f, 0.67447f, 0.07368f, 0.0f, 0.14352f, 0.05449f,
     39         0.74519f, 0.0f, 0.0f, 0.0f, 0.0f, 1.0f,
     40     };
     41 
     42     sk_sp<SkData> data = GetResourceAsData("icc_profiles/HP_ZR30w.icc");
     43     sk_sp<SkICC> z30 = SkICC::Make(data->data(), data->size());
     44     test_to_xyz_d50(r, z30.get(), true, z30Reference);
     45 
     46     const float z32Reference[16] = {
     47         0.61583f, 0.28789f, 0.00513f, 0.0f, 0.20428f, 0.66972f, 0.06609f, 0.0f, 0.14409f, 0.04237f,
     48         0.75368f, 0.0f, 0.0f, 0.0f, 0.0f, 1.0f,
     49     };
     50 
     51     data = GetResourceAsData("icc_profiles/HP_Z32x.icc");
     52     sk_sp<SkICC> z32 = SkICC::Make(data->data(), data->size());
     53     test_to_xyz_d50(r, z32.get(), true, z32Reference);
     54 
     55     data = GetResourceAsData("icc_profiles/upperLeft.icc");
     56     sk_sp<SkICC> upperLeft = SkICC::Make(data->data(), data->size());
     57     test_to_xyz_d50(r, upperLeft.get(), false, z32Reference);
     58 
     59     data = GetResourceAsData("icc_profiles/upperRight.icc");
     60     sk_sp<SkICC> upperRight = SkICC::Make(data->data(), data->size());
     61     test_to_xyz_d50(r, upperRight.get(), false, z32Reference);
     62 }
     63 
     64 static inline void test_is_numerical_transfer_fn(skiatest::Reporter* r, SkICC* icc,
     65                                                  bool shouldSucceed,
     66                                                  const SkColorSpaceTransferFn& reference) {
     67     SkColorSpaceTransferFn result;
     68     REPORTER_ASSERT(r, shouldSucceed == icc->isNumericalTransferFn(&result));
     69     if (shouldSucceed) {
     70         REPORTER_ASSERT(r, 0 == memcmp(&result, &reference, sizeof(SkColorSpaceTransferFn)));
     71     }
     72 }
     73 
     74 DEF_TEST(ICC_IsNumericalTransferFn, r) {
     75     SkColorSpaceTransferFn referenceFn;
     76     referenceFn.fA = 1.0f;
     77     referenceFn.fB = 0.0f;
     78     referenceFn.fC = 0.0f;
     79     referenceFn.fD = 0.0f;
     80     referenceFn.fE = 0.0f;
     81     referenceFn.fF = 0.0f;
     82     referenceFn.fG = 2.2f;
     83 
     84     sk_sp<SkData> data = GetResourceAsData("icc_profiles/HP_ZR30w.icc");
     85     sk_sp<SkICC> z30 = SkICC::Make(data->data(), data->size());
     86     test_is_numerical_transfer_fn(r, z30.get(), true, referenceFn);
     87 
     88     data = GetResourceAsData("icc_profiles/HP_Z32x.icc");
     89     sk_sp<SkICC> z32 = SkICC::Make(data->data(), data->size());
     90     test_is_numerical_transfer_fn(r, z32.get(), true, referenceFn);
     91 
     92     data = GetResourceAsData("icc_profiles/upperLeft.icc");
     93     sk_sp<SkICC> upperLeft = SkICC::Make(data->data(), data->size());
     94     test_is_numerical_transfer_fn(r, upperLeft.get(), false, referenceFn);
     95 
     96     data = GetResourceAsData("icc_profiles/upperRight.icc");
     97     sk_sp<SkICC> upperRight = SkICC::Make(data->data(), data->size());
     98     test_is_numerical_transfer_fn(r, upperRight.get(), false, referenceFn);
     99 }
    100 
    101 DEF_TEST(ICC_Adobe, r) {
    102     // Test that the color spaces produced by our procedural Adobe factory, and the official
    103     // Adobe ICC profile match exactly.
    104     sk_sp<SkData> data = GetResourceAsData("icc_profiles/AdobeRGB1998.icc");
    105     sk_sp<SkColorSpace> fromIcc = SkColorSpace::MakeICC(data->data(), data->size());
    106     sk_sp<SkColorSpace> procedural = SkColorSpace::MakeRGB(g2Dot2_TransferFn,
    107                                                            SkColorSpace::kAdobeRGB_Gamut);
    108     REPORTER_ASSERT(r, SkColorSpace::Equals(fromIcc.get(), procedural.get()));
    109 }
    110 
    111 static inline void test_write_icc(skiatest::Reporter* r, const SkColorSpaceTransferFn& fn,
    112                                   const SkMatrix44& toXYZD50, bool writeToFile) {
    113     sk_sp<SkData> profile = SkICC::WriteToICC(fn, toXYZD50);
    114     if (writeToFile) {
    115         SkFILEWStream stream("out.icc");
    116         stream.write(profile->data(), profile->size());
    117     }
    118 
    119     sk_sp<SkColorSpace> colorSpace = SkColorSpace::MakeICC(profile->data(), profile->size());
    120     sk_sp<SkColorSpace> reference = SkColorSpace::MakeRGB(fn, toXYZD50);
    121     REPORTER_ASSERT(r, SkColorSpace::Equals(reference.get(), colorSpace.get()));
    122 }
    123 
    124 DEF_TEST(ICC_WriteICC, r) {
    125     SkColorSpaceTransferFn adobeFn;
    126     adobeFn.fA = 1.0f;
    127     adobeFn.fB = 0.0f;
    128     adobeFn.fC = 0.0f;
    129     adobeFn.fD = 0.0f;
    130     adobeFn.fE = 0.0f;
    131     adobeFn.fF = 0.0f;
    132     adobeFn.fG = 2.2f;
    133     SkMatrix44 adobeMatrix(SkMatrix44::kUninitialized_Constructor);
    134     adobeMatrix.set3x3RowMajorf(gAdobeRGB_toXYZD50);
    135     test_write_icc(r, adobeFn, adobeMatrix, false);
    136 
    137     SkColorSpaceTransferFn srgbFn;
    138     srgbFn.fA = 1.0f / 1.055f;
    139     srgbFn.fB = 0.055f / 1.055f;
    140     srgbFn.fC = 1.0f / 12.92f;
    141     srgbFn.fD = 0.04045f;
    142     srgbFn.fE = 0.0f;
    143     srgbFn.fF = 0.0f;
    144     srgbFn.fG = 2.4f;
    145     SkMatrix44 srgbMatrix(SkMatrix44::kUninitialized_Constructor);
    146     srgbMatrix.set3x3RowMajorf(gSRGB_toXYZD50);
    147     test_write_icc(r, srgbFn, srgbMatrix, false);
    148 
    149     SkString adobeTag = SkICCGetColorProfileTag(adobeFn, adobeMatrix);
    150     SkString srgbTag = SkICCGetColorProfileTag(srgbFn, srgbMatrix);
    151     REPORTER_ASSERT(r, adobeTag != srgbTag);
    152     REPORTER_ASSERT(r, srgbTag.equals("sRGB"));
    153     REPORTER_ASSERT(r, adobeTag.equals("AdobeRGB"));
    154 }
    155 
    156 static inline void test_raw_transfer_fn(skiatest::Reporter* r, SkICC* icc) {
    157     SkICC::Tables tables;
    158     bool result = icc->rawTransferFnData(&tables);
    159     REPORTER_ASSERT(r, result);
    160 
    161     REPORTER_ASSERT(r, 0.0f == tables.red()[0]);
    162     REPORTER_ASSERT(r, 0.0f == tables.green()[0]);
    163     REPORTER_ASSERT(r, 0.0f == tables.blue()[0]);
    164     REPORTER_ASSERT(r, 1.0f == tables.red()[tables.fRed.fCount - 1]);
    165     REPORTER_ASSERT(r, 1.0f == tables.green()[tables.fGreen.fCount - 1]);
    166     REPORTER_ASSERT(r, 1.0f == tables.blue()[tables.fBlue.fCount - 1]);
    167 }
    168 
    169 class ICCTest {
    170 public:
    171     static sk_sp<SkICC> MakeICC(sk_sp<SkColorSpace> space) {
    172         return sk_sp<SkICC>(new SkICC(std::move(space)));
    173     }
    174     static sk_sp<SkICC> MakeICC(sk_sp<SkGammas> gammas) {
    175         return MakeICC(sk_sp<SkColorSpace>(new SkColorSpace_XYZ(
    176                 kNonStandard_SkGammaNamed, std::move(gammas),
    177                 SkMatrix44(SkMatrix44::kIdentity_Constructor), nullptr)));
    178     }
    179 };
    180 
    181 DEF_TEST(ICC_RawTransferFns, r) {
    182     sk_sp<SkICC> srgb = ICCTest::MakeICC(SkColorSpace::MakeSRGB());
    183     test_raw_transfer_fn(r, srgb.get());
    184 
    185     // Lookup-table based gamma curves
    186     constexpr size_t tableSize = 10;
    187     void* memory = sk_malloc_throw(sizeof(SkGammas) + sizeof(float) * tableSize);
    188     sk_sp<SkGammas> gammas = sk_sp<SkGammas>(new (memory) SkGammas(3));
    189     for (int i = 0; i < 3; ++i) {
    190         gammas->fType[i] = SkGammas::Type::kTable_Type;
    191         gammas->fData[i].fTable.fSize = tableSize;
    192         gammas->fData[i].fTable.fOffset = 0;
    193     }
    194 
    195     float* table = SkTAddOffset<float>(memory, sizeof(SkGammas));
    196     table[0] = 0.00f;
    197     table[1] = 0.05f;
    198     table[2] = 0.10f;
    199     table[3] = 0.15f;
    200     table[4] = 0.25f;
    201     table[5] = 0.35f;
    202     table[6] = 0.45f;
    203     table[7] = 0.60f;
    204     table[8] = 0.75f;
    205     table[9] = 1.00f;
    206     sk_sp<SkICC> tbl = ICCTest::MakeICC(gammas);
    207     test_raw_transfer_fn(r, tbl.get());
    208 
    209     // Parametric gamma curves
    210     memory = sk_malloc_throw(sizeof(SkGammas) + sizeof(SkColorSpaceTransferFn));
    211     gammas = sk_sp<SkGammas>(new (memory) SkGammas(3));
    212     for (int i = 0; i < 3; ++i) {
    213         gammas->fType[i] = SkGammas::Type::kParam_Type;
    214         gammas->fData[i].fParamOffset = 0;
    215     }
    216 
    217     SkColorSpaceTransferFn* params = SkTAddOffset<SkColorSpaceTransferFn>
    218             (memory, sizeof(SkGammas));
    219 
    220     // Interval.
    221     params->fD = 0.04045f;
    222 
    223     // First equation:
    224     params->fC = 1.0f / 12.92f;
    225     params->fF = 0.0f;
    226 
    227     // Second equation:
    228     // Note that the function is continuous (it's actually sRGB).
    229     params->fA = 1.0f / 1.055f;
    230     params->fB = 0.055f / 1.055f;
    231     params->fE = 0.0f;
    232     params->fG = 2.4f;
    233     sk_sp<SkICC> param = ICCTest::MakeICC(gammas);
    234     test_raw_transfer_fn(r, param.get());
    235 
    236     // Exponential gamma curves
    237     gammas = sk_sp<SkGammas>(new SkGammas(3));
    238     for (int i = 0; i < 3; ++i) {
    239         gammas->fType[i] = SkGammas::Type::kValue_Type;
    240         gammas->fData[i].fValue = 1.4f;
    241     }
    242     sk_sp<SkICC> exp = ICCTest::MakeICC(gammas);
    243     test_raw_transfer_fn(r, exp.get());
    244 
    245     gammas = sk_sp<SkGammas>(new SkGammas(3));
    246     gammas->fType[0] = gammas->fType[1] = gammas->fType[2] = SkGammas::Type::kNamed_Type;
    247     gammas->fData[0].fNamed = kSRGB_SkGammaNamed;
    248     gammas->fData[1].fNamed = k2Dot2Curve_SkGammaNamed;
    249     gammas->fData[2].fNamed = kLinear_SkGammaNamed;
    250     sk_sp<SkICC> named = ICCTest::MakeICC(gammas);
    251     test_raw_transfer_fn(r, named.get());
    252 
    253     memory = sk_malloc_throw(sizeof(SkGammas) + sizeof(float) * tableSize +
    254                                    sizeof(SkColorSpaceTransferFn));
    255     gammas = sk_sp<SkGammas>(new (memory) SkGammas(3));
    256 
    257     table = SkTAddOffset<float>(memory, sizeof(SkGammas));
    258     table[0] = 0.00f;
    259     table[1] = 0.15f;
    260     table[2] = 0.20f;
    261     table[3] = 0.25f;
    262     table[4] = 0.35f;
    263     table[5] = 0.45f;
    264     table[6] = 0.55f;
    265     table[7] = 0.70f;
    266     table[8] = 0.85f;
    267     table[9] = 1.00f;
    268 
    269     params = SkTAddOffset<SkColorSpaceTransferFn>(memory,
    270             sizeof(SkGammas) + sizeof(float) * tableSize);
    271     params->fA = 1.0f / 1.055f;
    272     params->fB = 0.055f / 1.055f;
    273     params->fC = 1.0f / 12.92f;
    274     params->fD = 0.04045f;
    275     params->fE = 0.0f;
    276     params->fF = 0.0f;
    277     params->fG = 2.4f;
    278 
    279     gammas->fType[0] = SkGammas::Type::kValue_Type;
    280     gammas->fData[0].fValue = 1.2f;
    281 
    282     gammas->fType[1] = SkGammas::Type::kTable_Type;
    283     gammas->fData[1].fTable.fSize = tableSize;
    284     gammas->fData[1].fTable.fOffset = 0;
    285 
    286     gammas->fType[2] = SkGammas::Type::kParam_Type;
    287     gammas->fData[2].fParamOffset = sizeof(float) * tableSize;
    288     sk_sp<SkICC> nonstd = ICCTest::MakeICC(gammas);
    289     test_raw_transfer_fn(r, nonstd.get());
    290 
    291     // Reverse order of table and exponent
    292     gammas->fType[1] = SkGammas::Type::kValue_Type;
    293     gammas->fData[1].fValue = 1.2f;
    294 
    295     gammas->fType[0] = SkGammas::Type::kTable_Type;
    296     gammas->fData[0].fTable.fSize = tableSize;
    297     gammas->fData[0].fTable.fOffset = 0;
    298     sk_sp<SkICC> nonstd2 = ICCTest::MakeICC(gammas);
    299     test_raw_transfer_fn(r, nonstd2.get());
    300 }
    301