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1 /* | 1 /* |
2 * Copyright 2016 Google Inc. | 2 * Copyright 2016 Google Inc. |
3 * | 3 * |
4 * Use of this source code is governed by a BSD-style license that can be | 4 * Use of this source code is governed by a BSD-style license that can be |
5 * found in the LICENSE file. | 5 * found in the LICENSE file. |
6 */ | 6 */ |
7 | 7 |
8 #include "Resources.h" | 8 #include "Resources.h" |
9 #include "SkCodec.h" | 9 #include "SkCodec.h" |
10 #include "SkColorPriv.h" | 10 #include "SkColorPriv.h" |
11 #include "SkColorSpace.h" | 11 #include "SkColorSpace.h" |
12 #include "SkColorSpace_Base.h" | 12 #include "SkColorSpace_Base.h" |
13 #include "SkColorSpaceXform.h" | 13 #include "SkColorSpaceXform.h" |
14 #include "Test.h" | 14 #include "Test.h" |
15 | 15 |
16 class ColorSpaceXformTest { | 16 class ColorSpaceXformTest { |
17 public: | 17 public: |
18 static SkDefaultXform* CreateDefaultXform(const sk_sp<SkGammas>& srcGamma, | 18 static std::unique_ptr<SkColorSpaceXform> CreateDefaultXform(const sk_sp<SkG
ammas>& srcGamma, |
19 const SkMatrix44& srcToDst, const sk_sp<SkGammas>& dstGamma) { | 19 const SkMatrix44& srcToDst, const sk_sp<SkGammas>& dstGamma) { |
20 return new SkDefaultXform(srcGamma, srcToDst, dstGamma); | 20 |
| 21 sk_sp<SkColorSpace> srcSpace( |
| 22 new SkColorSpace_Base(nullptr, srcGamma, SkMatrix::I(), nullptr)
); |
| 23 sk_sp<SkColorSpace> dstSpace( |
| 24 new SkColorSpace_Base(nullptr, dstGamma, SkMatrix::I(), nullptr)
); |
| 25 |
| 26 return SkColorSpaceXform::New(srcSpace, dstSpace); |
21 } | 27 } |
22 }; | 28 }; |
23 | 29 |
| 30 static bool almost_equal(int x, int y) { |
| 31 return SkTAbs(x - y) <= 1; |
| 32 } |
| 33 |
24 static void test_xform(skiatest::Reporter* r, const sk_sp<SkGammas>& gammas) { | 34 static void test_xform(skiatest::Reporter* r, const sk_sp<SkGammas>& gammas) { |
25 // Arbitrary set of 10 pixels | 35 // Arbitrary set of 10 pixels |
26 constexpr int width = 10; | 36 constexpr int width = 10; |
27 constexpr uint32_t srcPixels[width] = { | 37 constexpr uint32_t srcPixels[width] = { |
28 0xFFABCDEF, 0xFF146829, 0xFF382759, 0xFF184968, 0xFFDE8271, | 38 0xFFABCDEF, 0xFF146829, 0xFF382759, 0xFF184968, 0xFFDE8271, |
29 0xFF32AB52, 0xFF0383BC, 0xFF000000, 0xFFFFFFFF, 0xFFDDEEFF, }; | 39 0xFF32AB52, 0xFF0383BC, 0xFF000102, 0xFFFFFFFF, 0xFFDDEEFF, }; |
30 uint32_t dstPixels[width]; | 40 uint32_t dstPixels[width]; |
31 | 41 |
32 // Identity matrix | 42 // Identity matrix |
33 SkMatrix44 srcToDst = SkMatrix44::I(); | 43 SkMatrix44 srcToDst = SkMatrix44::I(); |
34 | 44 |
35 // Create and perform xform | 45 // Create and perform xform |
36 std::unique_ptr<SkColorSpaceXform> xform( | 46 std::unique_ptr<SkColorSpaceXform> xform = |
37 ColorSpaceXformTest::CreateDefaultXform(gammas, srcToDst, gammas)); | 47 ColorSpaceXformTest::CreateDefaultXform(gammas, srcToDst, gammas); |
38 xform->xform_RGB1_8888(dstPixels, srcPixels, width); | 48 xform->xform_RGB1_8888(dstPixels, srcPixels, width); |
39 | 49 |
40 // Since the matrix is the identity, and the gamma curves match, the pixels | 50 // Since the matrix is the identity, and the gamma curves match, the pixels |
41 // should be unchanged. | 51 // should be unchanged. |
42 for (int i = 0; i < width; i++) { | 52 for (int i = 0; i < width; i++) { |
43 // TODO (msarett): | 53 REPORTER_ASSERT(r, almost_equal(((srcPixels[i] >> 0) & 0xFF), |
44 // As the implementation changes, we may want to use a tolerance here. | 54 SkGetPackedR32(dstPixels[i]))); |
45 REPORTER_ASSERT(r, ((srcPixels[i] >> 0) & 0xFF) == SkGetPackedR32(dstPi
xels[i])); | 55 REPORTER_ASSERT(r, almost_equal(((srcPixels[i] >> 8) & 0xFF), |
46 REPORTER_ASSERT(r, ((srcPixels[i] >> 8) & 0xFF) == SkGetPackedG32(dstPi
xels[i])); | 56 SkGetPackedG32(dstPixels[i]))); |
47 REPORTER_ASSERT(r, ((srcPixels[i] >> 16) & 0xFF) == SkGetPackedB32(dstPi
xels[i])); | 57 REPORTER_ASSERT(r, almost_equal(((srcPixels[i] >> 16) & 0xFF), |
48 REPORTER_ASSERT(r, ((srcPixels[i] >> 24) & 0xFF) == SkGetPackedA32(dstPi
xels[i])); | 58 SkGetPackedB32(dstPixels[i]))); |
| 59 REPORTER_ASSERT(r, almost_equal(((srcPixels[i] >> 24) & 0xFF), |
| 60 SkGetPackedA32(dstPixels[i]))); |
49 } | 61 } |
50 } | 62 } |
51 | 63 |
52 DEF_TEST(ColorSpaceXform_TableGamma, r) { | 64 DEF_TEST(ColorSpaceXform_TableGamma, r) { |
53 // Lookup-table based gamma curves | 65 // Lookup-table based gamma curves |
54 SkGammaCurve red, green, blue; | 66 SkGammaCurve red, green, blue; |
55 constexpr size_t tableSize = 10; | 67 constexpr size_t tableSize = 10; |
56 red.fTable = std::unique_ptr<float[]>(new float[tableSize]); | 68 red.fTable = std::unique_ptr<float[]>(new float[tableSize]); |
57 green.fTable = std::unique_ptr<float[]>(new float[tableSize]); | 69 green.fTable = std::unique_ptr<float[]>(new float[tableSize]); |
58 blue.fTable = std::unique_ptr<float[]>(new float[tableSize]); | 70 blue.fTable = std::unique_ptr<float[]>(new float[tableSize]); |
(...skipping 10 matching lines...) Expand all Loading... |
69 red.fTable[9] = green.fTable[9] = blue.fTable[9] = 1.00f; | 81 red.fTable[9] = green.fTable[9] = blue.fTable[9] = 1.00f; |
70 sk_sp<SkGammas> gammas = | 82 sk_sp<SkGammas> gammas = |
71 sk_make_sp<SkGammas>(std::move(red), std::move(green), std::move(blu
e)); | 83 sk_make_sp<SkGammas>(std::move(red), std::move(green), std::move(blu
e)); |
72 test_xform(r, gammas); | 84 test_xform(r, gammas); |
73 } | 85 } |
74 | 86 |
75 DEF_TEST(ColorSpaceXform_ParametricGamma, r) { | 87 DEF_TEST(ColorSpaceXform_ParametricGamma, r) { |
76 // Parametric gamma curves | 88 // Parametric gamma curves |
77 SkGammaCurve red, green, blue; | 89 SkGammaCurve red, green, blue; |
78 | 90 |
79 // Interval, switch xforms at 0.5f | 91 // Interval, switch xforms at 0.0031308f |
80 red.fD = green.fD = blue.fD = 0.5f; | 92 red.fD = green.fD = blue.fD = 0.04045f; |
81 | 93 |
82 // First equation, Y = 0.5f * X | 94 // First equation: |
83 red.fE = green.fE = blue.fE = 0.5f; | 95 red.fE = green.fE = blue.fE = 1.0f / 12.92f; |
84 | 96 |
85 // Second equation, Y = ((1.0f * X) + 0.0f) ^ 3.0f + 0.125f | 97 // Second equation: |
86 // Note that the function is continuous: | 98 // Note that the function is continuous (it's actually sRGB). |
87 // 0.5f * 0.5f = ((1.0f * 0.5f) + 0.0f) ^ 3.0f + 0.125f = 0.25f | 99 red.fA = green.fA = blue.fA = 1.0f / 1.055f; |
88 red.fA = green.fA = blue.fA = 1.0f; | 100 red.fB = green.fB = blue.fB = 0.055f / 1.055f; |
89 red.fB = green.fB = blue.fB = 0.0f; | 101 red.fC = green.fC = blue.fC = 0.0f; |
90 red.fC = green.fC = blue.fC = 0.125f; | 102 red.fG = green.fG = blue.fG = 2.4f; |
91 red.fG = green.fG = blue.fG = 3.0f; | 103 sk_sp<SkGammas> gammas = |
92 sk_sp<SkGammas> gammas = sk_make_sp<SkGammas>(std::move(red), std::move(gree
n), std::move(blue)); | 104 sk_make_sp<SkGammas>(std::move(red), std::move(green), std::move(blu
e)); |
93 test_xform(r, gammas); | 105 test_xform(r, gammas); |
94 } | 106 } |
95 | 107 |
96 DEF_TEST(ColorSpaceXform_ExponentialGamma, r) { | 108 DEF_TEST(ColorSpaceXform_ExponentialGamma, r) { |
97 // Exponential gamma curves | 109 // Exponential gamma curves |
98 SkGammaCurve red, green, blue; | 110 SkGammaCurve red, green, blue; |
99 red.fValue = green.fValue = blue.fValue = 4.0f; | 111 red.fValue = green.fValue = blue.fValue = 1.4f; |
100 sk_sp<SkGammas> gammas = | 112 sk_sp<SkGammas> gammas = |
101 sk_make_sp<SkGammas>(std::move(red), std::move(green), std::move(blu
e)); | 113 sk_make_sp<SkGammas>(std::move(red), std::move(green), std::move(blu
e)); |
102 test_xform(r, gammas); | 114 test_xform(r, gammas); |
103 } | 115 } |
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