msarett | dc27a64 | 2016-06-06 12:02:31 -0700 | [diff] [blame] | 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" |
msarett | c044461 | 2016-09-16 11:45:58 -0700 | [diff] [blame] | 10 | #include "SkCodecPriv.h" |
msarett | dc27a64 | 2016-06-06 12:02:31 -0700 | [diff] [blame] | 11 | #include "SkColorPriv.h" |
| 12 | #include "SkColorSpace.h" |
| 13 | #include "SkColorSpace_Base.h" |
raftias | 9488833 | 2016-10-18 10:02:51 -0700 | [diff] [blame^] | 14 | #include "SkColorSpace_XYZ.h" |
msarett | 31d097e8 | 2016-10-11 12:15:03 -0700 | [diff] [blame] | 15 | #include "SkColorSpaceXform_Base.h" |
msarett | dc27a64 | 2016-06-06 12:02:31 -0700 | [diff] [blame] | 16 | #include "Test.h" |
| 17 | |
| 18 | class ColorSpaceXformTest { |
| 19 | public: |
mtklein | b435963 | 2016-07-18 11:16:14 -0700 | [diff] [blame] | 20 | static std::unique_ptr<SkColorSpaceXform> CreateIdentityXform(const sk_sp<SkGammas>& gammas) { |
| 21 | // Logically we can pass any matrix here. For simplicty, pass I(), i.e. D50 XYZ gamut. |
raftias | 9488833 | 2016-10-18 10:02:51 -0700 | [diff] [blame^] | 22 | sk_sp<SkColorSpace> space(new SkColorSpace_XYZ( |
| 23 | kNonStandard_SkGammaNamed, gammas, SkMatrix::I(), nullptr)); |
msarett | 9dc6cf6 | 2016-08-23 17:53:06 -0700 | [diff] [blame] | 24 | |
| 25 | // Use special testing entry point, so we don't skip the xform, even though src == dst. |
raftias | 9488833 | 2016-10-18 10:02:51 -0700 | [diff] [blame^] | 26 | return SlowIdentityXform(static_cast<SkColorSpace_XYZ*>(space.get())); |
msarett | dc27a64 | 2016-06-06 12:02:31 -0700 | [diff] [blame] | 27 | } |
| 28 | }; |
| 29 | |
msarett | b390676 | 2016-06-22 14:07:48 -0700 | [diff] [blame] | 30 | static bool almost_equal(int x, int y) { |
| 31 | return SkTAbs(x - y) <= 1; |
| 32 | } |
| 33 | |
Matt Sarett | f489886 | 2016-10-16 10:20:41 -0400 | [diff] [blame] | 34 | static void test_identity_xform(skiatest::Reporter* r, const sk_sp<SkGammas>& gammas, |
| 35 | bool repeat) { |
msarett | dc27a64 | 2016-06-06 12:02:31 -0700 | [diff] [blame] | 36 | // Arbitrary set of 10 pixels |
| 37 | constexpr int width = 10; |
| 38 | constexpr uint32_t srcPixels[width] = { |
| 39 | 0xFFABCDEF, 0xFF146829, 0xFF382759, 0xFF184968, 0xFFDE8271, |
msarett | b390676 | 2016-06-22 14:07:48 -0700 | [diff] [blame] | 40 | 0xFF32AB52, 0xFF0383BC, 0xFF000102, 0xFFFFFFFF, 0xFFDDEEFF, }; |
msarett | dc27a64 | 2016-06-06 12:02:31 -0700 | [diff] [blame] | 41 | uint32_t dstPixels[width]; |
| 42 | |
mtklein | b435963 | 2016-07-18 11:16:14 -0700 | [diff] [blame] | 43 | // Create and perform an identity xform. |
| 44 | std::unique_ptr<SkColorSpaceXform> xform = ColorSpaceXformTest::CreateIdentityXform(gammas); |
msarett | 31d097e8 | 2016-10-11 12:15:03 -0700 | [diff] [blame] | 45 | bool result = xform->apply(select_xform_format(kN32_SkColorType), dstPixels, |
| 46 | SkColorSpaceXform::kBGRA_8888_ColorFormat, srcPixels, width, |
| 47 | kOpaque_SkAlphaType); |
| 48 | REPORTER_ASSERT(r, result); |
msarett | dc27a64 | 2016-06-06 12:02:31 -0700 | [diff] [blame] | 49 | |
mtklein | b435963 | 2016-07-18 11:16:14 -0700 | [diff] [blame] | 50 | // Since the src->dst matrix is the identity, and the gamma curves match, |
| 51 | // the pixels should be unchanged. |
msarett | dc27a64 | 2016-06-06 12:02:31 -0700 | [diff] [blame] | 52 | for (int i = 0; i < width; i++) { |
msarett | b390676 | 2016-06-22 14:07:48 -0700 | [diff] [blame] | 53 | REPORTER_ASSERT(r, almost_equal(((srcPixels[i] >> 0) & 0xFF), |
msarett | cf7b877 | 2016-09-22 12:37:04 -0700 | [diff] [blame] | 54 | SkGetPackedB32(dstPixels[i]))); |
msarett | b390676 | 2016-06-22 14:07:48 -0700 | [diff] [blame] | 55 | REPORTER_ASSERT(r, almost_equal(((srcPixels[i] >> 8) & 0xFF), |
msarett | 9dc6cf6 | 2016-08-23 17:53:06 -0700 | [diff] [blame] | 56 | SkGetPackedG32(dstPixels[i]))); |
msarett | b390676 | 2016-06-22 14:07:48 -0700 | [diff] [blame] | 57 | REPORTER_ASSERT(r, almost_equal(((srcPixels[i] >> 16) & 0xFF), |
msarett | cf7b877 | 2016-09-22 12:37:04 -0700 | [diff] [blame] | 58 | SkGetPackedR32(dstPixels[i]))); |
msarett | b390676 | 2016-06-22 14:07:48 -0700 | [diff] [blame] | 59 | REPORTER_ASSERT(r, almost_equal(((srcPixels[i] >> 24) & 0xFF), |
msarett | 9dc6cf6 | 2016-08-23 17:53:06 -0700 | [diff] [blame] | 60 | SkGetPackedA32(dstPixels[i]))); |
msarett | dc27a64 | 2016-06-06 12:02:31 -0700 | [diff] [blame] | 61 | } |
Matt Sarett | f489886 | 2016-10-16 10:20:41 -0400 | [diff] [blame] | 62 | |
| 63 | if (repeat) { |
| 64 | // We should cache part of the transform after the run. So it is interesting |
| 65 | // to make sure it still runs correctly the second time. |
| 66 | test_identity_xform(r, gammas, false); |
| 67 | } |
msarett | dc27a64 | 2016-06-06 12:02:31 -0700 | [diff] [blame] | 68 | } |
| 69 | |
| 70 | DEF_TEST(ColorSpaceXform_TableGamma, r) { |
| 71 | // Lookup-table based gamma curves |
msarett | dc27a64 | 2016-06-06 12:02:31 -0700 | [diff] [blame] | 72 | constexpr size_t tableSize = 10; |
msarett | 1b93bd1 | 2016-07-21 07:11:26 -0700 | [diff] [blame] | 73 | void* memory = sk_malloc_throw(sizeof(SkGammas) + sizeof(float) * tableSize); |
| 74 | sk_sp<SkGammas> gammas = sk_sp<SkGammas>(new (memory) SkGammas()); |
| 75 | gammas->fRedType = gammas->fGreenType = gammas->fBlueType = SkGammas::Type::kTable_Type; |
| 76 | gammas->fRedData.fTable.fSize = gammas->fGreenData.fTable.fSize = |
| 77 | gammas->fBlueData.fTable.fSize = tableSize; |
| 78 | gammas->fRedData.fTable.fOffset = gammas->fGreenData.fTable.fOffset = |
| 79 | gammas->fBlueData.fTable.fOffset = 0; |
| 80 | float* table = SkTAddOffset<float>(memory, sizeof(SkGammas)); |
| 81 | |
| 82 | table[0] = 0.00f; |
| 83 | table[1] = 0.05f; |
| 84 | table[2] = 0.10f; |
| 85 | table[3] = 0.15f; |
| 86 | table[4] = 0.25f; |
| 87 | table[5] = 0.35f; |
| 88 | table[6] = 0.45f; |
| 89 | table[7] = 0.60f; |
| 90 | table[8] = 0.75f; |
| 91 | table[9] = 1.00f; |
Matt Sarett | f489886 | 2016-10-16 10:20:41 -0400 | [diff] [blame] | 92 | test_identity_xform(r, gammas, true); |
msarett | dc27a64 | 2016-06-06 12:02:31 -0700 | [diff] [blame] | 93 | } |
| 94 | |
| 95 | DEF_TEST(ColorSpaceXform_ParametricGamma, r) { |
| 96 | // Parametric gamma curves |
Matt Sarett | df44fc5 | 2016-10-11 16:57:50 -0400 | [diff] [blame] | 97 | void* memory = sk_malloc_throw(sizeof(SkGammas) + sizeof(SkColorSpaceTransferFn)); |
msarett | 1b93bd1 | 2016-07-21 07:11:26 -0700 | [diff] [blame] | 98 | sk_sp<SkGammas> gammas = sk_sp<SkGammas>(new (memory) SkGammas()); |
| 99 | gammas->fRedType = gammas->fGreenType = gammas->fBlueType = SkGammas::Type::kParam_Type; |
| 100 | gammas->fRedData.fParamOffset = gammas->fGreenData.fParamOffset = |
| 101 | gammas->fBlueData.fParamOffset = 0; |
Matt Sarett | df44fc5 | 2016-10-11 16:57:50 -0400 | [diff] [blame] | 102 | SkColorSpaceTransferFn* params = SkTAddOffset<SkColorSpaceTransferFn> |
| 103 | (memory, sizeof(SkGammas)); |
msarett | dc27a64 | 2016-06-06 12:02:31 -0700 | [diff] [blame] | 104 | |
msarett | b390676 | 2016-06-22 14:07:48 -0700 | [diff] [blame] | 105 | // Interval, switch xforms at 0.0031308f |
msarett | 1b93bd1 | 2016-07-21 07:11:26 -0700 | [diff] [blame] | 106 | params->fD = 0.04045f; |
msarett | dc27a64 | 2016-06-06 12:02:31 -0700 | [diff] [blame] | 107 | |
msarett | b390676 | 2016-06-22 14:07:48 -0700 | [diff] [blame] | 108 | // First equation: |
msarett | 1b93bd1 | 2016-07-21 07:11:26 -0700 | [diff] [blame] | 109 | params->fE = 1.0f / 12.92f; |
| 110 | params->fF = 0.0f; |
msarett | dc27a64 | 2016-06-06 12:02:31 -0700 | [diff] [blame] | 111 | |
msarett | b390676 | 2016-06-22 14:07:48 -0700 | [diff] [blame] | 112 | // Second equation: |
| 113 | // Note that the function is continuous (it's actually sRGB). |
msarett | 1b93bd1 | 2016-07-21 07:11:26 -0700 | [diff] [blame] | 114 | params->fA = 1.0f / 1.055f; |
| 115 | params->fB = 0.055f / 1.055f; |
| 116 | params->fC = 0.0f; |
| 117 | params->fG = 2.4f; |
Matt Sarett | f489886 | 2016-10-16 10:20:41 -0400 | [diff] [blame] | 118 | test_identity_xform(r, gammas, true); |
msarett | dc27a64 | 2016-06-06 12:02:31 -0700 | [diff] [blame] | 119 | } |
| 120 | |
| 121 | DEF_TEST(ColorSpaceXform_ExponentialGamma, r) { |
| 122 | // Exponential gamma curves |
msarett | 1b93bd1 | 2016-07-21 07:11:26 -0700 | [diff] [blame] | 123 | sk_sp<SkGammas> gammas = sk_sp<SkGammas>(new SkGammas()); |
| 124 | gammas->fRedType = gammas->fGreenType = gammas->fBlueType = SkGammas::Type::kValue_Type; |
| 125 | gammas->fRedData.fValue = gammas->fGreenData.fValue = gammas->fBlueData.fValue = 1.4f; |
Matt Sarett | f489886 | 2016-10-16 10:20:41 -0400 | [diff] [blame] | 126 | test_identity_xform(r, gammas, true); |
msarett | 1b93bd1 | 2016-07-21 07:11:26 -0700 | [diff] [blame] | 127 | } |
| 128 | |
msarett | 55bcc8e | 2016-09-09 07:48:05 -0700 | [diff] [blame] | 129 | DEF_TEST(ColorSpaceXform_NamedGamma, r) { |
| 130 | sk_sp<SkGammas> gammas = sk_sp<SkGammas>(new SkGammas()); |
| 131 | gammas->fRedType = gammas->fGreenType = gammas->fBlueType = SkGammas::Type::kNamed_Type; |
| 132 | gammas->fRedData.fNamed = kSRGB_SkGammaNamed; |
| 133 | gammas->fGreenData.fNamed = k2Dot2Curve_SkGammaNamed; |
| 134 | gammas->fBlueData.fNamed = kLinear_SkGammaNamed; |
Matt Sarett | f489886 | 2016-10-16 10:20:41 -0400 | [diff] [blame] | 135 | test_identity_xform(r, gammas, true); |
msarett | 55bcc8e | 2016-09-09 07:48:05 -0700 | [diff] [blame] | 136 | } |
| 137 | |
msarett | 1b93bd1 | 2016-07-21 07:11:26 -0700 | [diff] [blame] | 138 | DEF_TEST(ColorSpaceXform_NonMatchingGamma, r) { |
| 139 | constexpr size_t tableSize = 10; |
| 140 | void* memory = sk_malloc_throw(sizeof(SkGammas) + sizeof(float) * tableSize + |
Matt Sarett | df44fc5 | 2016-10-11 16:57:50 -0400 | [diff] [blame] | 141 | sizeof(SkColorSpaceTransferFn)); |
msarett | 1b93bd1 | 2016-07-21 07:11:26 -0700 | [diff] [blame] | 142 | sk_sp<SkGammas> gammas = sk_sp<SkGammas>(new (memory) SkGammas()); |
| 143 | |
| 144 | float* table = SkTAddOffset<float>(memory, sizeof(SkGammas)); |
| 145 | table[0] = 0.00f; |
| 146 | table[1] = 0.15f; |
| 147 | table[2] = 0.20f; |
| 148 | table[3] = 0.25f; |
| 149 | table[4] = 0.35f; |
| 150 | table[5] = 0.45f; |
| 151 | table[6] = 0.55f; |
| 152 | table[7] = 0.70f; |
| 153 | table[8] = 0.85f; |
| 154 | table[9] = 1.00f; |
| 155 | |
Matt Sarett | df44fc5 | 2016-10-11 16:57:50 -0400 | [diff] [blame] | 156 | SkColorSpaceTransferFn* params = SkTAddOffset<SkColorSpaceTransferFn>(memory, |
| 157 | sizeof(SkGammas) + sizeof(float) * tableSize); |
msarett | 1b93bd1 | 2016-07-21 07:11:26 -0700 | [diff] [blame] | 158 | params->fA = 1.0f / 1.055f; |
| 159 | params->fB = 0.055f / 1.055f; |
| 160 | params->fC = 0.0f; |
| 161 | params->fD = 0.04045f; |
| 162 | params->fE = 1.0f / 12.92f; |
| 163 | params->fF = 0.0f; |
| 164 | params->fG = 2.4f; |
| 165 | |
| 166 | gammas->fRedType = SkGammas::Type::kValue_Type; |
| 167 | gammas->fRedData.fValue = 1.2f; |
| 168 | |
| 169 | gammas->fGreenType = SkGammas::Type::kTable_Type; |
| 170 | gammas->fGreenData.fTable.fSize = tableSize; |
| 171 | gammas->fGreenData.fTable.fOffset = 0; |
| 172 | |
| 173 | gammas->fBlueType = SkGammas::Type::kParam_Type; |
| 174 | gammas->fBlueData.fParamOffset = sizeof(float) * tableSize; |
| 175 | |
Matt Sarett | f489886 | 2016-10-16 10:20:41 -0400 | [diff] [blame] | 176 | test_identity_xform(r, gammas, true); |
msarett | dc27a64 | 2016-06-06 12:02:31 -0700 | [diff] [blame] | 177 | } |
raftias | c6cc28c | 2016-09-29 14:31:44 -0400 | [diff] [blame] | 178 | |