reed | 6d3cef9 | 2016-01-22 01:04:29 -0800 | [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 | |
herb | 42da45d | 2016-04-08 14:24:37 -0700 | [diff] [blame] | 8 | #include "SkBitmapProcShader.h" |
reed | 6d3cef9 | 2016-01-22 01:04:29 -0800 | [diff] [blame] | 9 | #include "SkColor.h" |
reed | 5f34e8e | 2016-01-23 14:19:06 -0800 | [diff] [blame] | 10 | #include "SkColorMatrixFilter.h" |
reed | 7f225cf | 2016-01-23 19:37:56 -0800 | [diff] [blame] | 11 | #include "SkGradientShader.h" |
| 12 | #include "SkImage.h" |
reed | dd9ffea | 2016-02-18 12:39:14 -0800 | [diff] [blame] | 13 | #include "SkPM4f.h" |
reed | 7f225cf | 2016-01-23 19:37:56 -0800 | [diff] [blame] | 14 | #include "SkShader.h" |
| 15 | |
reed | 6d3cef9 | 2016-01-22 01:04:29 -0800 | [diff] [blame] | 16 | #include "Test.h" |
| 17 | #include "SkRandom.h" |
| 18 | |
reed | 7f225cf | 2016-01-23 19:37:56 -0800 | [diff] [blame] | 19 | const float kTolerance = 1.0f / (1 << 20); |
| 20 | |
| 21 | static bool nearly_equal(float a, float b, float tol = kTolerance) { |
| 22 | SkASSERT(tol >= 0); |
| 23 | return fabsf(a - b) <= tol; |
| 24 | } |
| 25 | |
| 26 | static bool nearly_equal(const SkPM4f a, const SkPM4f& b, float tol = kTolerance) { |
| 27 | for (int i = 0; i < 4; ++i) { |
| 28 | if (!nearly_equal(a.fVec[i], b.fVec[i], tol)) { |
| 29 | return false; |
| 30 | } |
| 31 | } |
| 32 | return true; |
| 33 | } |
| 34 | |
reed | 6d3cef9 | 2016-01-22 01:04:29 -0800 | [diff] [blame] | 35 | DEF_TEST(SkColor4f_FromColor, reporter) { |
| 36 | const struct { |
| 37 | SkColor fC; |
| 38 | SkColor4f fC4; |
| 39 | } recs[] = { |
brianosman | e074d1f | 2016-06-24 06:31:47 -0700 | [diff] [blame] | 40 | { SK_ColorBLACK, { 0, 0, 0, 1 } }, |
reed | 6d3cef9 | 2016-01-22 01:04:29 -0800 | [diff] [blame] | 41 | { SK_ColorWHITE, { 1, 1, 1, 1 } }, |
brianosman | e074d1f | 2016-06-24 06:31:47 -0700 | [diff] [blame] | 42 | { SK_ColorRED, { 1, 0, 0, 1 } }, |
| 43 | { SK_ColorGREEN, { 0, 1, 0, 1 } }, |
| 44 | { SK_ColorBLUE, { 0, 0, 1, 1 } }, |
reed | 6d3cef9 | 2016-01-22 01:04:29 -0800 | [diff] [blame] | 45 | { 0, { 0, 0, 0, 0 } }, |
reed | 6d3cef9 | 2016-01-22 01:04:29 -0800 | [diff] [blame] | 46 | }; |
| 47 | |
| 48 | for (const auto& r : recs) { |
| 49 | SkColor4f c4 = SkColor4f::FromColor(r.fC); |
| 50 | REPORTER_ASSERT(reporter, c4 == r.fC4); |
| 51 | } |
| 52 | } |
| 53 | |
reed | 7f225cf | 2016-01-23 19:37:56 -0800 | [diff] [blame] | 54 | DEF_TEST(Color4f_premul, reporter) { |
reed | 6d3cef9 | 2016-01-22 01:04:29 -0800 | [diff] [blame] | 55 | SkRandom rand; |
| 56 | |
| 57 | for (int i = 0; i < 1000000; ++i) { |
| 58 | // First just test opaque colors, so that the premul should be exact |
| 59 | SkColor4f c4 { |
brianosman | e074d1f | 2016-06-24 06:31:47 -0700 | [diff] [blame] | 60 | rand.nextUScalar1(), rand.nextUScalar1(), rand.nextUScalar1(), 1 |
reed | 6d3cef9 | 2016-01-22 01:04:29 -0800 | [diff] [blame] | 61 | }; |
| 62 | SkPM4f pm4 = c4.premul(); |
reed | 93bb080 | 2016-03-08 10:09:18 -0800 | [diff] [blame] | 63 | REPORTER_ASSERT(reporter, pm4.a() == c4.fA); |
| 64 | REPORTER_ASSERT(reporter, pm4.r() == c4.fA * c4.fR); |
| 65 | REPORTER_ASSERT(reporter, pm4.g() == c4.fA * c4.fG); |
| 66 | REPORTER_ASSERT(reporter, pm4.b() == c4.fA * c4.fB); |
reed | 6d3cef9 | 2016-01-22 01:04:29 -0800 | [diff] [blame] | 67 | |
| 68 | // We compare with a tolerance, in case our premul multiply is implemented at slightly |
| 69 | // different precision than the test code. |
| 70 | c4.fA = rand.nextUScalar1(); |
| 71 | pm4 = c4.premul(); |
| 72 | REPORTER_ASSERT(reporter, pm4.fVec[SK_A_INDEX] == c4.fA); |
reed | 93bb080 | 2016-03-08 10:09:18 -0800 | [diff] [blame] | 73 | REPORTER_ASSERT(reporter, nearly_equal(pm4.r(), c4.fA * c4.fR)); |
| 74 | REPORTER_ASSERT(reporter, nearly_equal(pm4.g(), c4.fA * c4.fG)); |
| 75 | REPORTER_ASSERT(reporter, nearly_equal(pm4.b(), c4.fA * c4.fB)); |
reed | 6d3cef9 | 2016-01-22 01:04:29 -0800 | [diff] [blame] | 76 | } |
| 77 | } |
reed | 7f225cf | 2016-01-23 19:37:56 -0800 | [diff] [blame] | 78 | |
| 79 | ////////////////////////////////////////////////////////////////////////////////////////////////// |
| 80 | |
reed | d053ce9 | 2016-03-22 10:17:23 -0700 | [diff] [blame] | 81 | static sk_sp<SkColorFilter> make_mode_cf() { |
| 82 | return SkColorFilter::MakeModeFilter(0xFFBB8855, SkXfermode::kPlus_Mode); |
reed | 3b69b82 | 2016-01-24 11:15:14 -0800 | [diff] [blame] | 83 | } |
reed | 7f225cf | 2016-01-23 19:37:56 -0800 | [diff] [blame] | 84 | |
reed | d053ce9 | 2016-03-22 10:17:23 -0700 | [diff] [blame] | 85 | static sk_sp<SkColorFilter> make_mx_cf() { |
reed | 3b69b82 | 2016-01-24 11:15:14 -0800 | [diff] [blame] | 86 | const float mx[] = { |
| 87 | 0.5f, 0, 0, 0, 0.1f, |
| 88 | 0, 0.5f, 0, 0, 0.2f, |
| 89 | 0, 0, 1, 0, -0.1f, |
| 90 | 0, 0, 0, 1, 0, |
| 91 | }; |
reed | d053ce9 | 2016-03-22 10:17:23 -0700 | [diff] [blame] | 92 | return SkColorFilter::MakeMatrixFilterRowMajor255(mx); |
reed | 3b69b82 | 2016-01-24 11:15:14 -0800 | [diff] [blame] | 93 | } |
| 94 | |
reed | d053ce9 | 2016-03-22 10:17:23 -0700 | [diff] [blame] | 95 | static sk_sp<SkColorFilter> make_compose_cf() { |
| 96 | return SkColorFilter::MakeComposeFilter(make_mode_cf(), make_mx_cf()); |
reed | 3b69b82 | 2016-01-24 11:15:14 -0800 | [diff] [blame] | 97 | } |
| 98 | |
reed | 93bb080 | 2016-03-08 10:09:18 -0800 | [diff] [blame] | 99 | static bool compare_spans(const SkPM4f span4f[], const SkPMColor span4b[], int count, |
| 100 | float tolerance = 1.0f/255) { |
reed | 7f225cf | 2016-01-23 19:37:56 -0800 | [diff] [blame] | 101 | for (int i = 0; i < count; ++i) { |
| 102 | SkPM4f c0 = SkPM4f::FromPMColor(span4b[i]); |
| 103 | SkPM4f c1 = span4f[i]; |
reed | 93bb080 | 2016-03-08 10:09:18 -0800 | [diff] [blame] | 104 | if (!nearly_equal(c0, c1, tolerance)) { |
| 105 | return false; |
| 106 | } |
reed | 7f225cf | 2016-01-23 19:37:56 -0800 | [diff] [blame] | 107 | } |
reed | 93bb080 | 2016-03-08 10:09:18 -0800 | [diff] [blame] | 108 | return true; |
reed | 7f225cf | 2016-01-23 19:37:56 -0800 | [diff] [blame] | 109 | } |
| 110 | |
reed | 7f225cf | 2016-01-23 19:37:56 -0800 | [diff] [blame] | 111 | DEF_TEST(Color4f_colorfilter, reporter) { |
| 112 | struct { |
reed | d053ce9 | 2016-03-22 10:17:23 -0700 | [diff] [blame] | 113 | sk_sp<SkColorFilter> (*fFact)(); |
| 114 | bool fSupports4f; |
| 115 | const char* fName; |
reed | 7f225cf | 2016-01-23 19:37:56 -0800 | [diff] [blame] | 116 | } recs[] = { |
reed | 93bb080 | 2016-03-08 10:09:18 -0800 | [diff] [blame] | 117 | { make_mode_cf, true, "mode" }, |
| 118 | { make_mx_cf, true, "matrix" }, |
| 119 | { make_compose_cf, true, "compose" }, |
reed | 7f225cf | 2016-01-23 19:37:56 -0800 | [diff] [blame] | 120 | }; |
| 121 | |
| 122 | // prepare the src |
| 123 | const int N = 100; |
| 124 | SkPMColor src4b[N]; |
| 125 | SkPM4f src4f[N]; |
| 126 | SkRandom rand; |
| 127 | for (int i = 0; i < N; ++i) { |
| 128 | src4b[i] = SkPreMultiplyColor(rand.nextU()); |
| 129 | src4f[i] = SkPM4f::FromPMColor(src4b[i]); |
| 130 | } |
| 131 | // confirm that our srcs are (nearly) equal |
reed | 93bb080 | 2016-03-08 10:09:18 -0800 | [diff] [blame] | 132 | REPORTER_ASSERT(reporter, compare_spans(src4f, src4b, N)); |
reed | 7f225cf | 2016-01-23 19:37:56 -0800 | [diff] [blame] | 133 | |
| 134 | for (const auto& rec : recs) { |
reed | d053ce9 | 2016-03-22 10:17:23 -0700 | [diff] [blame] | 135 | auto filter(rec.fFact()); |
reed | c5b1228 | 2016-02-19 13:38:53 -0800 | [diff] [blame] | 136 | SkPMColor dst4b[N]; |
| 137 | filter->filterSpan(src4b, N, dst4b); |
| 138 | SkPM4f dst4f[N]; |
| 139 | filter->filterSpan4f(src4f, N, dst4f); |
reed | 93bb080 | 2016-03-08 10:09:18 -0800 | [diff] [blame] | 140 | REPORTER_ASSERT(reporter, compare_spans(dst4f, dst4b, N)); |
reed | 7f225cf | 2016-01-23 19:37:56 -0800 | [diff] [blame] | 141 | } |
| 142 | } |
reed | 3125565 | 2016-02-08 12:56:56 -0800 | [diff] [blame] | 143 | |
| 144 | /////////////////////////////////////////////////////////////////////////////////////////////////// |
| 145 | |
| 146 | typedef SkPM4f (*SkXfermodeProc4f)(const SkPM4f& src, const SkPM4f& dst); |
| 147 | |
| 148 | static bool compare_procs(SkXfermodeProc proc32, SkXfermodeProc4f proc4f) { |
| 149 | const float kTolerance = 1.0f / 255; |
| 150 | |
| 151 | const SkColor colors[] = { |
| 152 | 0, 0xFF000000, 0xFFFFFFFF, 0x80FF0000 |
| 153 | }; |
| 154 | |
| 155 | for (auto s32 : colors) { |
| 156 | SkPMColor s_pm32 = SkPreMultiplyColor(s32); |
| 157 | SkPM4f s_pm4f = SkColor4f::FromColor(s32).premul(); |
| 158 | for (auto d32 : colors) { |
| 159 | SkPMColor d_pm32 = SkPreMultiplyColor(d32); |
| 160 | SkPM4f d_pm4f = SkColor4f::FromColor(d32).premul(); |
| 161 | |
| 162 | SkPMColor r32 = proc32(s_pm32, d_pm32); |
| 163 | SkPM4f r4f = proc4f(s_pm4f, d_pm4f); |
| 164 | |
| 165 | SkPM4f r32_4f = SkPM4f::FromPMColor(r32); |
| 166 | if (!nearly_equal(r4f, r32_4f, kTolerance)) { |
| 167 | return false; |
| 168 | } |
| 169 | } |
| 170 | } |
| 171 | return true; |
| 172 | } |
| 173 | |
| 174 | // Check that our Proc and Proc4f return (nearly) the same results |
| 175 | // |
| 176 | DEF_TEST(Color4f_xfermode_proc4f, reporter) { |
| 177 | // TODO: extend xfermodes so that all cases can be tested. |
| 178 | // |
| 179 | for (int mode = SkXfermode::kClear_Mode; mode <= SkXfermode::kScreen_Mode; ++mode) { |
| 180 | SkXfermodeProc proc32 = SkXfermode::GetProc((SkXfermode::Mode)mode); |
| 181 | SkXfermodeProc4f proc4f = SkXfermode::GetProc4f((SkXfermode::Mode)mode); |
| 182 | REPORTER_ASSERT(reporter, compare_procs(proc32, proc4f)); |
| 183 | } |
| 184 | } |