epoger@google.com | ec3ed6a | 2011-07-28 14:26:00 +0000 | [diff] [blame] | 1 | /* |
| 2 | * Copyright 2011 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 | */ |
tfarina@chromium.org | e4fafb1 | 2013-12-12 21:11:12 +0000 | [diff] [blame] | 7 | |
reed@google.com | 43c50c8 | 2011-04-14 15:50:52 +0000 | [diff] [blame] | 8 | #include "SkColor.h" |
| 9 | #include "SkColorFilter.h" |
tfarina@chromium.org | 8f6884a | 2014-01-24 20:56:26 +0000 | [diff] [blame] | 10 | #include "SkColorPriv.h" |
commit-bot@chromium.org | 6c1ee2d | 2013-10-07 18:00:17 +0000 | [diff] [blame] | 11 | #include "SkLumaColorFilter.h" |
commit-bot@chromium.org | 8b0e8ac | 2014-01-30 18:58:24 +0000 | [diff] [blame] | 12 | #include "SkReadBuffer.h" |
| 13 | #include "SkWriteBuffer.h" |
tfarina@chromium.org | 8f6884a | 2014-01-24 20:56:26 +0000 | [diff] [blame] | 14 | #include "SkRandom.h" |
| 15 | #include "SkXfermode.h" |
| 16 | #include "Test.h" |
reed@google.com | 43c50c8 | 2011-04-14 15:50:52 +0000 | [diff] [blame] | 17 | |
reed@google.com | 3534822 | 2013-10-16 13:05:06 +0000 | [diff] [blame] | 18 | static SkColorFilter* reincarnate_colorfilter(SkFlattenable* obj) { |
commit-bot@chromium.org | 8b0e8ac | 2014-01-30 18:58:24 +0000 | [diff] [blame] | 19 | SkWriteBuffer wb; |
djsollen@google.com | cefc865 | 2012-03-26 15:52:10 +0000 | [diff] [blame] | 20 | wb.writeFlattenable(obj); |
reed@google.com | 43c50c8 | 2011-04-14 15:50:52 +0000 | [diff] [blame] | 21 | |
commit-bot@chromium.org | 8b0e8ac | 2014-01-30 18:58:24 +0000 | [diff] [blame] | 22 | size_t size = wb.bytesWritten(); |
reed@google.com | 43c50c8 | 2011-04-14 15:50:52 +0000 | [diff] [blame] | 23 | SkAutoSMalloc<1024> storage(size); |
| 24 | // make a copy into storage |
djsollen@google.com | c73dd5c | 2012-08-07 15:54:32 +0000 | [diff] [blame] | 25 | wb.writeToMemory(storage.get()); |
reed@google.com | 43c50c8 | 2011-04-14 15:50:52 +0000 | [diff] [blame] | 26 | |
commit-bot@chromium.org | 8b0e8ac | 2014-01-30 18:58:24 +0000 | [diff] [blame] | 27 | SkReadBuffer rb(storage.get(), size); |
reed@google.com | 3534822 | 2013-10-16 13:05:06 +0000 | [diff] [blame] | 28 | return rb.readColorFilter(); |
reed@google.com | 43c50c8 | 2011-04-14 15:50:52 +0000 | [diff] [blame] | 29 | } |
| 30 | |
| 31 | /////////////////////////////////////////////////////////////////////////////// |
| 32 | |
reed | dc81222 | 2015-03-05 07:21:02 -0800 | [diff] [blame] | 33 | static SkColorFilter* make_filter() { |
| 34 | // pick a filter that cannot compose with itself via newComposed() |
| 35 | return SkColorFilter::CreateModeFilter(SK_ColorRED, SkXfermode::kColorBurn_Mode); |
| 36 | } |
| 37 | |
| 38 | static void test_composecolorfilter_limit(skiatest::Reporter* reporter) { |
| 39 | // Test that CreateComposeFilter() has some finite limit (i.e. that the factory can return null) |
| 40 | const int way_too_many = 100; |
| 41 | SkAutoTUnref<SkColorFilter> parent(make_filter()); |
| 42 | for (int i = 2; i < way_too_many; ++i) { |
| 43 | SkAutoTUnref<SkColorFilter> filter(make_filter()); |
| 44 | parent.reset(SkColorFilter::CreateComposeFilter(parent, filter)); |
| 45 | if (NULL == parent) { |
| 46 | REPORTER_ASSERT(reporter, i > 2); // we need to have succeeded at least once! |
| 47 | return; |
| 48 | } |
| 49 | } |
| 50 | REPORTER_ASSERT(reporter, false); // we never saw a NULL :( |
| 51 | } |
| 52 | |
reed@google.com | 43c50c8 | 2011-04-14 15:50:52 +0000 | [diff] [blame] | 53 | #define ILLEGAL_MODE ((SkXfermode::Mode)-1) |
| 54 | |
tfarina@chromium.org | e4fafb1 | 2013-12-12 21:11:12 +0000 | [diff] [blame] | 55 | DEF_TEST(ColorFilter, reporter) { |
commit-bot@chromium.org | e0e7cfe | 2013-09-09 20:09:12 +0000 | [diff] [blame] | 56 | SkRandom rand; |
reed@google.com | 43c50c8 | 2011-04-14 15:50:52 +0000 | [diff] [blame] | 57 | |
| 58 | for (int mode = 0; mode <= SkXfermode::kLastMode; mode++) { |
| 59 | SkColor color = rand.nextU(); |
| 60 | |
| 61 | // ensure we always get a filter, by avoiding the possibility of a |
| 62 | // special case that would return NULL (if color's alpha is 0 or 0xFF) |
| 63 | color = SkColorSetA(color, 0x7F); |
| 64 | |
| 65 | SkColorFilter* cf = SkColorFilter::CreateModeFilter(color, |
| 66 | (SkXfermode::Mode)mode); |
| 67 | |
| 68 | // allow for no filter if we're in Dst mode (its a no op) |
| 69 | if (SkXfermode::kDst_Mode == mode && NULL == cf) { |
| 70 | continue; |
| 71 | } |
| 72 | |
| 73 | SkAutoUnref aur(cf); |
| 74 | REPORTER_ASSERT(reporter, cf); |
| 75 | |
| 76 | SkColor c = ~color; |
| 77 | SkXfermode::Mode m = ILLEGAL_MODE; |
| 78 | |
| 79 | SkColor expectedColor = color; |
| 80 | SkXfermode::Mode expectedMode = (SkXfermode::Mode)mode; |
| 81 | |
| 82 | // SkDebugf("--- mc [%d %x] ", mode, color); |
| 83 | |
| 84 | REPORTER_ASSERT(reporter, cf->asColorMode(&c, &m)); |
| 85 | // handle special-case folding by the factory |
| 86 | if (SkXfermode::kClear_Mode == mode) { |
| 87 | if (c != expectedColor) { |
| 88 | expectedColor = 0; |
| 89 | } |
| 90 | if (m != expectedMode) { |
| 91 | expectedMode = SkXfermode::kSrc_Mode; |
| 92 | } |
rmistry@google.com | d6176b0 | 2012-08-23 18:14:13 +0000 | [diff] [blame] | 93 | } |
reed@google.com | 43c50c8 | 2011-04-14 15:50:52 +0000 | [diff] [blame] | 94 | |
| 95 | // SkDebugf("--- got [%d %x] expected [%d %x]\n", m, c, expectedMode, expectedColor); |
| 96 | |
| 97 | REPORTER_ASSERT(reporter, c == expectedColor); |
| 98 | REPORTER_ASSERT(reporter, m == expectedMode); |
rmistry@google.com | d6176b0 | 2012-08-23 18:14:13 +0000 | [diff] [blame] | 99 | |
reed@google.com | 43c50c8 | 2011-04-14 15:50:52 +0000 | [diff] [blame] | 100 | { |
reed@google.com | 3534822 | 2013-10-16 13:05:06 +0000 | [diff] [blame] | 101 | SkColorFilter* cf2 = reincarnate_colorfilter(cf); |
reed@google.com | 43c50c8 | 2011-04-14 15:50:52 +0000 | [diff] [blame] | 102 | SkAutoUnref aur2(cf2); |
| 103 | REPORTER_ASSERT(reporter, cf2); |
| 104 | |
| 105 | SkColor c2 = ~color; |
| 106 | SkXfermode::Mode m2 = ILLEGAL_MODE; |
| 107 | REPORTER_ASSERT(reporter, cf2->asColorMode(&c2, &m2)); |
| 108 | REPORTER_ASSERT(reporter, c2 == expectedColor); |
| 109 | REPORTER_ASSERT(reporter, m2 == expectedMode); |
| 110 | } |
| 111 | } |
reed | dc81222 | 2015-03-05 07:21:02 -0800 | [diff] [blame] | 112 | |
| 113 | test_composecolorfilter_limit(reporter); |
reed@google.com | 43c50c8 | 2011-04-14 15:50:52 +0000 | [diff] [blame] | 114 | } |
| 115 | |
commit-bot@chromium.org | 6c1ee2d | 2013-10-07 18:00:17 +0000 | [diff] [blame] | 116 | /////////////////////////////////////////////////////////////////////////////// |
| 117 | |
tfarina@chromium.org | e4fafb1 | 2013-12-12 21:11:12 +0000 | [diff] [blame] | 118 | DEF_TEST(LumaColorFilter, reporter) { |
commit-bot@chromium.org | 6c1ee2d | 2013-10-07 18:00:17 +0000 | [diff] [blame] | 119 | SkPMColor in, out; |
| 120 | SkAutoTUnref<SkColorFilter> lf(SkLumaColorFilter::Create()); |
| 121 | |
commit-bot@chromium.org | d494b09 | 2013-10-10 20:13:51 +0000 | [diff] [blame] | 122 | // Applying luma to white produces black with the same transparency. |
commit-bot@chromium.org | 6c1ee2d | 2013-10-07 18:00:17 +0000 | [diff] [blame] | 123 | for (unsigned i = 0; i < 256; ++i) { |
| 124 | in = SkPackARGB32(i, i, i, i); |
| 125 | lf->filterSpan(&in, 1, &out); |
commit-bot@chromium.org | d494b09 | 2013-10-10 20:13:51 +0000 | [diff] [blame] | 126 | REPORTER_ASSERT(reporter, SkGetPackedA32(out) == i); |
| 127 | REPORTER_ASSERT(reporter, SkGetPackedR32(out) == 0); |
| 128 | REPORTER_ASSERT(reporter, SkGetPackedG32(out) == 0); |
| 129 | REPORTER_ASSERT(reporter, SkGetPackedB32(out) == 0); |
commit-bot@chromium.org | 6c1ee2d | 2013-10-07 18:00:17 +0000 | [diff] [blame] | 130 | } |
| 131 | |
| 132 | // Applying luma to black yields transparent black (luminance(black) == 0) |
| 133 | for (unsigned i = 0; i < 256; ++i) { |
| 134 | in = SkPackARGB32(i, 0, 0, 0); |
| 135 | lf->filterSpan(&in, 1, &out); |
| 136 | REPORTER_ASSERT(reporter, out == SK_ColorTRANSPARENT); |
| 137 | } |
| 138 | |
commit-bot@chromium.org | d494b09 | 2013-10-10 20:13:51 +0000 | [diff] [blame] | 139 | // For general colors, a luma filter generates black with an attenuated alpha channel. |
commit-bot@chromium.org | 6c1ee2d | 2013-10-07 18:00:17 +0000 | [diff] [blame] | 140 | for (unsigned i = 1; i < 256; ++i) { |
| 141 | in = SkPackARGB32(i, i, i / 2, i / 3); |
| 142 | lf->filterSpan(&in, 1, &out); |
| 143 | REPORTER_ASSERT(reporter, out != in); |
| 144 | REPORTER_ASSERT(reporter, SkGetPackedA32(out) <= i); |
commit-bot@chromium.org | d494b09 | 2013-10-10 20:13:51 +0000 | [diff] [blame] | 145 | REPORTER_ASSERT(reporter, SkGetPackedR32(out) == 0); |
| 146 | REPORTER_ASSERT(reporter, SkGetPackedG32(out) == 0); |
| 147 | REPORTER_ASSERT(reporter, SkGetPackedB32(out) == 0); |
commit-bot@chromium.org | 6c1ee2d | 2013-10-07 18:00:17 +0000 | [diff] [blame] | 148 | } |
| 149 | } |
reed | 0b18c35 | 2015-04-09 08:27:27 -0700 | [diff] [blame] | 150 | |
| 151 | /////////////////////////////////////////////////////////////////////////////// |
| 152 | |
| 153 | #include "SkColorMatrixFilter.h" |
| 154 | |
| 155 | static void get_brightness_matrix(float amount, float matrix[20]) { |
| 156 | // Spec implementation |
| 157 | // (http://dvcs.w3.org/hg/FXTF/raw-file/tip/filters/index.html#brightnessEquivalent) |
| 158 | // <feFunc[R|G|B] type="linear" slope="[amount]"> |
| 159 | memset(matrix, 0, 20 * sizeof(SkScalar)); |
| 160 | matrix[0] = matrix[6] = matrix[12] = amount; |
| 161 | matrix[18] = 1.f; |
| 162 | } |
| 163 | |
| 164 | static void get_grayscale_matrix(float amount, float matrix[20]) { |
| 165 | // Note, these values are computed to ensure MatrixNeedsClamping is false |
| 166 | // for amount in [0..1] |
| 167 | matrix[0] = 0.2126f + 0.7874f * amount; |
| 168 | matrix[1] = 0.7152f - 0.7152f * amount; |
| 169 | matrix[2] = 1.f - (matrix[0] + matrix[1]); |
| 170 | matrix[3] = matrix[4] = 0.f; |
| 171 | |
| 172 | matrix[5] = 0.2126f - 0.2126f * amount; |
| 173 | matrix[6] = 0.7152f + 0.2848f * amount; |
| 174 | matrix[7] = 1.f - (matrix[5] + matrix[6]); |
| 175 | matrix[8] = matrix[9] = 0.f; |
| 176 | |
| 177 | matrix[10] = 0.2126f - 0.2126f * amount; |
| 178 | matrix[11] = 0.7152f - 0.7152f * amount; |
| 179 | matrix[12] = 1.f - (matrix[10] + matrix[11]); |
| 180 | matrix[13] = matrix[14] = 0.f; |
| 181 | |
| 182 | matrix[15] = matrix[16] = matrix[17] = matrix[19] = 0.f; |
| 183 | matrix[18] = 1.f; |
| 184 | } |
| 185 | |
| 186 | static SkColorFilter* make_cf0() { |
| 187 | SkScalar matrix[20]; |
| 188 | get_brightness_matrix(0.5f, matrix); |
| 189 | return SkColorMatrixFilter::Create(matrix); |
| 190 | } |
| 191 | static SkColorFilter* make_cf1() { |
| 192 | SkScalar matrix[20]; |
| 193 | get_grayscale_matrix(1, matrix); |
| 194 | return SkColorMatrixFilter::Create(matrix); |
| 195 | } |
| 196 | static SkColorFilter* make_cf2() { |
| 197 | SkColorMatrix m0, m1; |
| 198 | get_brightness_matrix(0.5f, m0.fMat); |
| 199 | get_grayscale_matrix(1, m1.fMat); |
| 200 | m0.preConcat(m1); |
| 201 | return SkColorMatrixFilter::Create(m0); |
| 202 | } |
| 203 | static SkColorFilter* make_cf3() { |
| 204 | SkColorMatrix m0, m1; |
| 205 | get_brightness_matrix(0.5f, m0.fMat); |
| 206 | get_grayscale_matrix(1, m1.fMat); |
| 207 | m0.postConcat(m1); |
| 208 | return SkColorMatrixFilter::Create(m0); |
| 209 | } |
| 210 | typedef SkColorFilter* (*CFProc)(); |
| 211 | |
| 212 | // Test that a colormatrix that "should" preserve opaquness actually does. |
| 213 | DEF_TEST(ColorMatrixFilter, reporter) { |
| 214 | const CFProc procs[] = { |
| 215 | make_cf0, make_cf1, make_cf2, make_cf3, |
| 216 | }; |
| 217 | |
| 218 | for (size_t i = 0; i < SK_ARRAY_COUNT(procs); ++i) { |
| 219 | SkAutoTUnref<SkColorFilter> cf(procs[i]()); |
| 220 | |
| 221 | // generate all possible r,g,b triples |
| 222 | for (int r = 0; r < 256; ++r) { |
| 223 | for (int g = 0; g < 256; ++g) { |
| 224 | SkPMColor storage[256]; |
| 225 | for (int b = 0; b < 256; ++b) { |
| 226 | storage[b] = SkPackARGB32(0xFF, r, g, b); |
| 227 | } |
| 228 | cf->filterSpan(storage, 256, storage); |
| 229 | for (int b = 0; b < 256; ++b) { |
| 230 | REPORTER_ASSERT(reporter, 0xFF == SkGetPackedA32(storage[b])); |
| 231 | } |
| 232 | } |
| 233 | } |
| 234 | } |
| 235 | } |