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