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