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 | */ |
reed@google.com | 7d68335 | 2012-12-03 21:19:52 +0000 | [diff] [blame^] | 7 | |
reed@google.com | 125002a | 2011-06-09 19:13:41 +0000 | [diff] [blame] | 8 | #include "Test.h" |
| 9 | #include "SkMatrix44.h" |
| 10 | |
vollick@chromium.org | 3959a76 | 2012-11-13 15:08:22 +0000 | [diff] [blame] | 11 | static bool nearly_equal_double(double a, double b) { |
| 12 | const double tolerance = 1e-7; |
| 13 | double diff = a - b; |
| 14 | if (diff < 0) |
| 15 | diff = -diff; |
| 16 | return diff <= tolerance; |
| 17 | } |
| 18 | |
reed@google.com | da9fac0 | 2011-06-13 14:46:52 +0000 | [diff] [blame] | 19 | static bool nearly_equal_scalar(SkMScalar a, SkMScalar b) { |
reed@google.com | 125002a | 2011-06-09 19:13:41 +0000 | [diff] [blame] | 20 | // Note that we get more compounded error for multiple operations when |
| 21 | // SK_SCALAR_IS_FIXED. |
| 22 | #ifdef SK_SCALAR_IS_FLOAT |
| 23 | const SkScalar tolerance = SK_Scalar1 / 200000; |
| 24 | #else |
| 25 | const SkScalar tolerance = SK_Scalar1 / 1024; |
| 26 | #endif |
| 27 | |
| 28 | return SkScalarAbs(a - b) <= tolerance; |
| 29 | } |
| 30 | |
reed@google.com | da9fac0 | 2011-06-13 14:46:52 +0000 | [diff] [blame] | 31 | template <typename T> void assert16(skiatest::Reporter* reporter, const T data[], |
| 32 | T m0, T m1, T m2, T m3, |
| 33 | T m4, T m5, T m6, T m7, |
| 34 | T m8, T m9, T m10, T m11, |
| 35 | T m12, T m13, T m14, T m15) { |
| 36 | REPORTER_ASSERT(reporter, data[0] == m0); |
| 37 | REPORTER_ASSERT(reporter, data[1] == m1); |
| 38 | REPORTER_ASSERT(reporter, data[2] == m2); |
| 39 | REPORTER_ASSERT(reporter, data[3] == m3); |
| 40 | |
| 41 | REPORTER_ASSERT(reporter, data[4] == m4); |
| 42 | REPORTER_ASSERT(reporter, data[5] == m5); |
| 43 | REPORTER_ASSERT(reporter, data[6] == m6); |
| 44 | REPORTER_ASSERT(reporter, data[7] == m7); |
| 45 | |
| 46 | REPORTER_ASSERT(reporter, data[8] == m8); |
| 47 | REPORTER_ASSERT(reporter, data[9] == m9); |
| 48 | REPORTER_ASSERT(reporter, data[10] == m10); |
| 49 | REPORTER_ASSERT(reporter, data[11] == m11); |
| 50 | |
| 51 | REPORTER_ASSERT(reporter, data[12] == m12); |
| 52 | REPORTER_ASSERT(reporter, data[13] == m13); |
| 53 | REPORTER_ASSERT(reporter, data[14] == m14); |
| 54 | REPORTER_ASSERT(reporter, data[15] == m15); |
| 55 | } |
| 56 | |
reed@google.com | 125002a | 2011-06-09 19:13:41 +0000 | [diff] [blame] | 57 | static bool nearly_equal(const SkMatrix44& a, const SkMatrix44& b) { |
| 58 | for (int i = 0; i < 4; ++i) { |
| 59 | for (int j = 0; j < 4; ++j) { |
| 60 | if (!nearly_equal_scalar(a.get(i, j), b.get(i, j))) { |
reed@google.com | da9fac0 | 2011-06-13 14:46:52 +0000 | [diff] [blame] | 61 | printf("not equal %g %g\n", a.get(i, j), b.get(i, j)); |
reed@google.com | 125002a | 2011-06-09 19:13:41 +0000 | [diff] [blame] | 62 | return false; |
| 63 | } |
| 64 | } |
| 65 | } |
| 66 | return true; |
| 67 | } |
| 68 | |
| 69 | static bool is_identity(const SkMatrix44& m) { |
| 70 | SkMatrix44 identity; |
| 71 | identity.reset(); |
| 72 | return nearly_equal(m, identity); |
| 73 | } |
| 74 | |
reed@google.com | 7d68335 | 2012-12-03 21:19:52 +0000 | [diff] [blame^] | 75 | static void test_gettype(skiatest::Reporter* reporter) { |
| 76 | SkMatrix44 matrix; |
| 77 | |
| 78 | REPORTER_ASSERT(reporter, matrix.isIdentity()); |
| 79 | REPORTER_ASSERT(reporter, SkMatrix44::kIdentity_Mask == matrix.getType()); |
| 80 | |
| 81 | int expectedMask; |
| 82 | |
| 83 | matrix.set(1, 1, 0); |
| 84 | expectedMask = SkMatrix44::kScale_Mask; |
| 85 | REPORTER_ASSERT(reporter, matrix.getType() == expectedMask); |
| 86 | |
| 87 | matrix.set(0, 3, 1); // translate-x |
| 88 | expectedMask |= SkMatrix44::kTranslate_Mask; |
| 89 | REPORTER_ASSERT(reporter, matrix.getType() == expectedMask); |
| 90 | |
| 91 | matrix.set(2, 0, 1); |
| 92 | expectedMask |= SkMatrix44::kAffine_Mask; |
| 93 | REPORTER_ASSERT(reporter, matrix.getType() == expectedMask); |
| 94 | |
| 95 | matrix.set(3, 2, 1); |
| 96 | REPORTER_ASSERT(reporter, matrix.getType() & SkMatrix44::kPerspective_Mask); |
| 97 | } |
| 98 | |
reed@google.com | 6f2b44d | 2011-06-24 18:13:39 +0000 | [diff] [blame] | 99 | static void test_common_angles(skiatest::Reporter* reporter) { |
| 100 | SkMatrix44 rot; |
| 101 | // Test precision of rotation in common cases |
| 102 | int common_angles[] = { 0, 90, -90, 180, -180, 270, -270, 360, -360 }; |
| 103 | for (int i = 0; i < 9; ++i) { |
robertphillips@google.com | 09042b8 | 2012-04-06 20:01:46 +0000 | [diff] [blame] | 104 | rot.setRotateDegreesAbout(0, 0, -1, SkIntToScalar(common_angles[i])); |
reed@google.com | 6f2b44d | 2011-06-24 18:13:39 +0000 | [diff] [blame] | 105 | |
| 106 | SkMatrix rot3x3 = rot; |
| 107 | REPORTER_ASSERT(reporter, rot3x3.rectStaysRect()); |
| 108 | } |
| 109 | } |
| 110 | |
reed@google.com | 80b577e | 2012-11-09 21:25:06 +0000 | [diff] [blame] | 111 | static void test_concat(skiatest::Reporter* reporter) { |
| 112 | int i; |
| 113 | SkMatrix44 a, b, c, d; |
| 114 | |
| 115 | a.setTranslate(10, 10, 10); |
| 116 | b.setScale(2, 2, 2); |
| 117 | |
| 118 | SkScalar src[8] = { |
| 119 | 0, 0, 0, 1, |
| 120 | 1, 1, 1, 1 |
| 121 | }; |
| 122 | SkScalar dst[8]; |
| 123 | |
| 124 | c.setConcat(a, b); |
| 125 | |
| 126 | d = a; |
| 127 | d.preConcat(b); |
| 128 | REPORTER_ASSERT(reporter, d == c); |
skia.committer@gmail.com | 453995e | 2012-11-10 02:01:26 +0000 | [diff] [blame] | 129 | |
reed@google.com | 1ea95be | 2012-11-09 21:39:48 +0000 | [diff] [blame] | 130 | c.mapScalars(src, dst); c.mapScalars(src + 4, dst + 4); |
reed@google.com | 80b577e | 2012-11-09 21:25:06 +0000 | [diff] [blame] | 131 | for (i = 0; i < 3; ++i) { |
| 132 | REPORTER_ASSERT(reporter, 10 == dst[i]); |
| 133 | REPORTER_ASSERT(reporter, 12 == dst[i + 4]); |
| 134 | } |
skia.committer@gmail.com | 453995e | 2012-11-10 02:01:26 +0000 | [diff] [blame] | 135 | |
reed@google.com | 80b577e | 2012-11-09 21:25:06 +0000 | [diff] [blame] | 136 | c.setConcat(b, a); |
| 137 | |
| 138 | d = a; |
| 139 | d.postConcat(b); |
| 140 | REPORTER_ASSERT(reporter, d == c); |
| 141 | |
reed@google.com | 1ea95be | 2012-11-09 21:39:48 +0000 | [diff] [blame] | 142 | c.mapScalars(src, dst); c.mapScalars(src + 4, dst + 4); |
reed@google.com | 80b577e | 2012-11-09 21:25:06 +0000 | [diff] [blame] | 143 | for (i = 0; i < 3; ++i) { |
| 144 | REPORTER_ASSERT(reporter, 20 == dst[i]); |
| 145 | REPORTER_ASSERT(reporter, 22 == dst[i + 4]); |
| 146 | } |
| 147 | } |
| 148 | |
vollick@chromium.org | 3959a76 | 2012-11-13 15:08:22 +0000 | [diff] [blame] | 149 | static void test_determinant(skiatest::Reporter* reporter) { |
vollick@chromium.org | f11cf9f | 2012-11-19 21:02:06 +0000 | [diff] [blame] | 150 | SkMatrix44 a; |
| 151 | REPORTER_ASSERT(reporter, nearly_equal_double(1, a.determinant())); |
reed@google.com | 7d68335 | 2012-12-03 21:19:52 +0000 | [diff] [blame^] | 152 | a.set(1, 1, 2); |
vollick@chromium.org | f11cf9f | 2012-11-19 21:02:06 +0000 | [diff] [blame] | 153 | REPORTER_ASSERT(reporter, nearly_equal_double(2, a.determinant())); |
| 154 | SkMatrix44 b; |
| 155 | REPORTER_ASSERT(reporter, a.invert(&b)); |
| 156 | REPORTER_ASSERT(reporter, nearly_equal_double(0.5, b.determinant())); |
| 157 | SkMatrix44 c = b = a; |
reed@google.com | 7d68335 | 2012-12-03 21:19:52 +0000 | [diff] [blame^] | 158 | c.set(0, 1, 4); |
| 159 | b.set(1, 0, 4); |
vollick@chromium.org | f11cf9f | 2012-11-19 21:02:06 +0000 | [diff] [blame] | 160 | REPORTER_ASSERT(reporter, |
| 161 | nearly_equal_double(a.determinant(), |
| 162 | b.determinant())); |
| 163 | SkMatrix44 d = a; |
reed@google.com | 7d68335 | 2012-12-03 21:19:52 +0000 | [diff] [blame^] | 164 | d.set(0, 0, 8); |
vollick@chromium.org | f11cf9f | 2012-11-19 21:02:06 +0000 | [diff] [blame] | 165 | REPORTER_ASSERT(reporter, nearly_equal_double(16, d.determinant())); |
vollick@chromium.org | 3959a76 | 2012-11-13 15:08:22 +0000 | [diff] [blame] | 166 | |
vollick@chromium.org | f11cf9f | 2012-11-19 21:02:06 +0000 | [diff] [blame] | 167 | SkMatrix44 e = a; |
| 168 | e.postConcat(d); |
| 169 | REPORTER_ASSERT(reporter, nearly_equal_double(32, e.determinant())); |
reed@google.com | 7d68335 | 2012-12-03 21:19:52 +0000 | [diff] [blame^] | 170 | e.set(0, 0, 0); |
vollick@chromium.org | f11cf9f | 2012-11-19 21:02:06 +0000 | [diff] [blame] | 171 | REPORTER_ASSERT(reporter, nearly_equal_double(0, e.determinant())); |
vollick@chromium.org | 3959a76 | 2012-11-13 15:08:22 +0000 | [diff] [blame] | 172 | } |
| 173 | |
vollick@chromium.org | 9b21c25 | 2012-11-14 21:33:55 +0000 | [diff] [blame] | 174 | static void test_transpose(skiatest::Reporter* reporter) { |
vollick@chromium.org | f11cf9f | 2012-11-19 21:02:06 +0000 | [diff] [blame] | 175 | SkMatrix44 a; |
| 176 | SkMatrix44 b; |
vollick@chromium.org | 9b21c25 | 2012-11-14 21:33:55 +0000 | [diff] [blame] | 177 | |
vollick@chromium.org | f11cf9f | 2012-11-19 21:02:06 +0000 | [diff] [blame] | 178 | int i = 0; |
| 179 | for (int row = 0; row < 4; ++row) { |
| 180 | for (int col = 0; col < 4; ++col) { |
| 181 | a.setDouble(row, col, i); |
| 182 | b.setDouble(col, row, i++); |
| 183 | } |
vollick@chromium.org | 9b21c25 | 2012-11-14 21:33:55 +0000 | [diff] [blame] | 184 | } |
vollick@chromium.org | 9b21c25 | 2012-11-14 21:33:55 +0000 | [diff] [blame] | 185 | |
vollick@chromium.org | f11cf9f | 2012-11-19 21:02:06 +0000 | [diff] [blame] | 186 | a.transpose(); |
| 187 | REPORTER_ASSERT(reporter, nearly_equal(a, b)); |
vollick@chromium.org | 9b21c25 | 2012-11-14 21:33:55 +0000 | [diff] [blame] | 188 | } |
| 189 | |
| 190 | static void test_get_set_double(skiatest::Reporter* reporter) { |
vollick@chromium.org | f11cf9f | 2012-11-19 21:02:06 +0000 | [diff] [blame] | 191 | SkMatrix44 a; |
| 192 | for (int row = 0; row < 4; ++row) { |
| 193 | for (int col = 0; col < 4; ++col) { |
| 194 | a.setDouble(row, col, 3.141592653589793); |
| 195 | REPORTER_ASSERT(reporter, |
| 196 | nearly_equal_double(3.141592653589793, |
| 197 | a.getDouble(row, col))); |
| 198 | a.setDouble(row, col, 0); |
| 199 | REPORTER_ASSERT(reporter, |
| 200 | nearly_equal_double(0, a.getDouble(row, col))); |
| 201 | } |
vollick@chromium.org | 9b21c25 | 2012-11-14 21:33:55 +0000 | [diff] [blame] | 202 | } |
vollick@chromium.org | f11cf9f | 2012-11-19 21:02:06 +0000 | [diff] [blame] | 203 | } |
| 204 | |
| 205 | static void test_set_row_col_major(skiatest::Reporter* reporter) { |
| 206 | SkMatrix44 a, b, c, d; |
reed@google.com | 7d68335 | 2012-12-03 21:19:52 +0000 | [diff] [blame^] | 207 | for (int row = 0; row < 4; ++row) { |
| 208 | for (int col = 0; col < 4; ++col) { |
vollick@chromium.org | f11cf9f | 2012-11-19 21:02:06 +0000 | [diff] [blame] | 209 | a.setDouble(row, col, row * 4 + col); |
reed@google.com | 7d68335 | 2012-12-03 21:19:52 +0000 | [diff] [blame^] | 210 | } |
| 211 | } |
| 212 | |
vollick@chromium.org | f11cf9f | 2012-11-19 21:02:06 +0000 | [diff] [blame] | 213 | double bufferd[16]; |
| 214 | float bufferf[16]; |
| 215 | a.asColMajord(bufferd); |
| 216 | b.setColMajord(bufferd); |
| 217 | REPORTER_ASSERT(reporter, nearly_equal(a, b)); |
| 218 | b.setRowMajord(bufferd); |
| 219 | b.transpose(); |
| 220 | REPORTER_ASSERT(reporter, nearly_equal(a, b)); |
| 221 | a.asColMajorf(bufferf); |
| 222 | b.setColMajorf(bufferf); |
| 223 | REPORTER_ASSERT(reporter, nearly_equal(a, b)); |
| 224 | b.setRowMajorf(bufferf); |
| 225 | b.transpose(); |
| 226 | REPORTER_ASSERT(reporter, nearly_equal(a, b)); |
vollick@chromium.org | 9b21c25 | 2012-11-14 21:33:55 +0000 | [diff] [blame] | 227 | } |
| 228 | |
caryclark@google.com | 42639cd | 2012-06-06 12:03:39 +0000 | [diff] [blame] | 229 | static void TestMatrix44(skiatest::Reporter* reporter) { |
reed@google.com | 125002a | 2011-06-09 19:13:41 +0000 | [diff] [blame] | 230 | SkMatrix44 mat, inverse, iden1, iden2, rot; |
| 231 | |
| 232 | mat.reset(); |
reed@google.com | 7d68335 | 2012-12-03 21:19:52 +0000 | [diff] [blame^] | 233 | mat.setTranslate(1, 1, 1); |
reed@google.com | 125002a | 2011-06-09 19:13:41 +0000 | [diff] [blame] | 234 | mat.invert(&inverse); |
| 235 | iden1.setConcat(mat, inverse); |
| 236 | REPORTER_ASSERT(reporter, is_identity(iden1)); |
| 237 | |
reed@google.com | 7d68335 | 2012-12-03 21:19:52 +0000 | [diff] [blame^] | 238 | mat.setScale(2, 2, 2); |
reed@google.com | 125002a | 2011-06-09 19:13:41 +0000 | [diff] [blame] | 239 | mat.invert(&inverse); |
| 240 | iden1.setConcat(mat, inverse); |
| 241 | REPORTER_ASSERT(reporter, is_identity(iden1)); |
| 242 | |
reed@google.com | 7d68335 | 2012-12-03 21:19:52 +0000 | [diff] [blame^] | 243 | mat.setScale(SK_MScalar1/2, SK_MScalar1/2, SK_MScalar1/2); |
reed@google.com | 125002a | 2011-06-09 19:13:41 +0000 | [diff] [blame] | 244 | mat.invert(&inverse); |
| 245 | iden1.setConcat(mat, inverse); |
| 246 | REPORTER_ASSERT(reporter, is_identity(iden1)); |
| 247 | |
reed@google.com | 7d68335 | 2012-12-03 21:19:52 +0000 | [diff] [blame^] | 248 | mat.setScale(3, 3, 3); |
| 249 | rot.setRotateDegreesAbout(0, 0, -1, 90); |
reed@google.com | 125002a | 2011-06-09 19:13:41 +0000 | [diff] [blame] | 250 | mat.postConcat(rot); |
| 251 | REPORTER_ASSERT(reporter, mat.invert(NULL)); |
| 252 | mat.invert(&inverse); |
| 253 | iden1.setConcat(mat, inverse); |
| 254 | REPORTER_ASSERT(reporter, is_identity(iden1)); |
| 255 | iden2.setConcat(inverse, mat); |
| 256 | REPORTER_ASSERT(reporter, is_identity(iden2)); |
reed@google.com | da9fac0 | 2011-06-13 14:46:52 +0000 | [diff] [blame] | 257 | |
| 258 | // test rol/col Major getters |
| 259 | { |
| 260 | mat.setTranslate(2, 3, 4); |
| 261 | float dataf[16]; |
| 262 | double datad[16]; |
rmistry@google.com | d6176b0 | 2012-08-23 18:14:13 +0000 | [diff] [blame] | 263 | |
reed@google.com | da9fac0 | 2011-06-13 14:46:52 +0000 | [diff] [blame] | 264 | mat.asColMajorf(dataf); |
| 265 | assert16<float>(reporter, dataf, |
| 266 | 1, 0, 0, 0, |
| 267 | 0, 1, 0, 0, |
| 268 | 0, 0, 1, 0, |
| 269 | 2, 3, 4, 1); |
| 270 | mat.asColMajord(datad); |
| 271 | assert16<double>(reporter, datad, 1, 0, 0, 0, |
| 272 | 0, 1, 0, 0, |
| 273 | 0, 0, 1, 0, |
| 274 | 2, 3, 4, 1); |
| 275 | mat.asRowMajorf(dataf); |
| 276 | assert16<float>(reporter, dataf, 1, 0, 0, 2, |
| 277 | 0, 1, 0, 3, |
| 278 | 0, 0, 1, 4, |
| 279 | 0, 0, 0, 1); |
| 280 | mat.asRowMajord(datad); |
| 281 | assert16<double>(reporter, datad, 1, 0, 0, 2, |
| 282 | 0, 1, 0, 3, |
| 283 | 0, 0, 1, 4, |
| 284 | 0, 0, 0, 1); |
| 285 | } |
reed@google.com | 6f2b44d | 2011-06-24 18:13:39 +0000 | [diff] [blame] | 286 | |
reed@google.com | 80b577e | 2012-11-09 21:25:06 +0000 | [diff] [blame] | 287 | test_concat(reporter); |
| 288 | |
caryclark@google.com | 42639cd | 2012-06-06 12:03:39 +0000 | [diff] [blame] | 289 | if (false) { // avoid bit rot, suppress warning (working on making this pass) |
| 290 | test_common_angles(reporter); |
| 291 | } |
vollick@chromium.org | 3959a76 | 2012-11-13 15:08:22 +0000 | [diff] [blame] | 292 | |
reed@google.com | 7d68335 | 2012-12-03 21:19:52 +0000 | [diff] [blame^] | 293 | test_gettype(reporter); |
vollick@chromium.org | 3959a76 | 2012-11-13 15:08:22 +0000 | [diff] [blame] | 294 | test_determinant(reporter); |
vollick@chromium.org | 9b21c25 | 2012-11-14 21:33:55 +0000 | [diff] [blame] | 295 | test_transpose(reporter); |
| 296 | test_get_set_double(reporter); |
reed@google.com | 7d68335 | 2012-12-03 21:19:52 +0000 | [diff] [blame^] | 297 | test_set_row_col_major(reporter); |
reed@google.com | 125002a | 2011-06-09 19:13:41 +0000 | [diff] [blame] | 298 | } |
| 299 | |
| 300 | #include "TestClassDef.h" |
| 301 | DEFINE_TESTCLASS("Matrix44", Matrix44TestClass, TestMatrix44) |