epoger@google.com | ec3ed6a | 2011-07-28 14:26:00 +0000 | [diff] [blame] | 1 | |
| 2 | /* |
| 3 | * Copyright 2011 Google Inc. |
| 4 | * |
| 5 | * Use of this source code is governed by a BSD-style license that can be |
| 6 | * found in the LICENSE file. |
| 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 | 6f2b44d | 2011-06-24 18:13:39 +0000 | [diff] [blame] | 75 | static void test_common_angles(skiatest::Reporter* reporter) { |
| 76 | SkMatrix44 rot; |
| 77 | // Test precision of rotation in common cases |
| 78 | int common_angles[] = { 0, 90, -90, 180, -180, 270, -270, 360, -360 }; |
| 79 | for (int i = 0; i < 9; ++i) { |
robertphillips@google.com | 09042b8 | 2012-04-06 20:01:46 +0000 | [diff] [blame] | 80 | rot.setRotateDegreesAbout(0, 0, -1, SkIntToScalar(common_angles[i])); |
reed@google.com | 6f2b44d | 2011-06-24 18:13:39 +0000 | [diff] [blame] | 81 | |
| 82 | SkMatrix rot3x3 = rot; |
| 83 | REPORTER_ASSERT(reporter, rot3x3.rectStaysRect()); |
| 84 | } |
| 85 | } |
| 86 | |
reed@google.com | 80b577e | 2012-11-09 21:25:06 +0000 | [diff] [blame] | 87 | static void test_concat(skiatest::Reporter* reporter) { |
| 88 | int i; |
| 89 | SkMatrix44 a, b, c, d; |
| 90 | |
| 91 | a.setTranslate(10, 10, 10); |
| 92 | b.setScale(2, 2, 2); |
| 93 | |
| 94 | SkScalar src[8] = { |
| 95 | 0, 0, 0, 1, |
| 96 | 1, 1, 1, 1 |
| 97 | }; |
| 98 | SkScalar dst[8]; |
| 99 | |
| 100 | c.setConcat(a, b); |
| 101 | |
| 102 | d = a; |
| 103 | d.preConcat(b); |
| 104 | REPORTER_ASSERT(reporter, d == c); |
skia.committer@gmail.com | 453995e | 2012-11-10 02:01:26 +0000 | [diff] [blame] | 105 | |
reed@google.com | 1ea95be | 2012-11-09 21:39:48 +0000 | [diff] [blame] | 106 | c.mapScalars(src, dst); c.mapScalars(src + 4, dst + 4); |
reed@google.com | 80b577e | 2012-11-09 21:25:06 +0000 | [diff] [blame] | 107 | for (i = 0; i < 3; ++i) { |
| 108 | REPORTER_ASSERT(reporter, 10 == dst[i]); |
| 109 | REPORTER_ASSERT(reporter, 12 == dst[i + 4]); |
| 110 | } |
skia.committer@gmail.com | 453995e | 2012-11-10 02:01:26 +0000 | [diff] [blame] | 111 | |
reed@google.com | 80b577e | 2012-11-09 21:25:06 +0000 | [diff] [blame] | 112 | c.setConcat(b, a); |
| 113 | |
| 114 | d = a; |
| 115 | d.postConcat(b); |
| 116 | REPORTER_ASSERT(reporter, d == c); |
| 117 | |
reed@google.com | 1ea95be | 2012-11-09 21:39:48 +0000 | [diff] [blame] | 118 | c.mapScalars(src, dst); c.mapScalars(src + 4, dst + 4); |
reed@google.com | 80b577e | 2012-11-09 21:25:06 +0000 | [diff] [blame] | 119 | for (i = 0; i < 3; ++i) { |
| 120 | REPORTER_ASSERT(reporter, 20 == dst[i]); |
| 121 | REPORTER_ASSERT(reporter, 22 == dst[i + 4]); |
| 122 | } |
| 123 | } |
| 124 | |
vollick@chromium.org | 3959a76 | 2012-11-13 15:08:22 +0000 | [diff] [blame] | 125 | static void test_determinant(skiatest::Reporter* reporter) { |
| 126 | SkMatrix44 a; |
| 127 | REPORTER_ASSERT(reporter, nearly_equal_double(1, a.determinant())); |
| 128 | a.set(1, 1, SkFloatToMScalar(2)); |
| 129 | REPORTER_ASSERT(reporter, nearly_equal_double(2, a.determinant())); |
| 130 | SkMatrix44 b; |
| 131 | REPORTER_ASSERT(reporter, a.invert(&b)); |
| 132 | REPORTER_ASSERT(reporter, nearly_equal_double(0.5, b.determinant())); |
| 133 | SkMatrix44 c = b = a; |
| 134 | c.set(0, 1, SkFloatToMScalar(4)); |
| 135 | b.set(1, 0, SkFloatToMScalar(4)); |
| 136 | REPORTER_ASSERT(reporter, |
| 137 | nearly_equal_double(a.determinant(), |
| 138 | b.determinant())); |
| 139 | SkMatrix44 d = a; |
| 140 | d.set(0, 0, SkFloatToMScalar(8)); |
| 141 | REPORTER_ASSERT(reporter, nearly_equal_double(16, d.determinant())); |
| 142 | |
| 143 | SkMatrix44 e = a; |
| 144 | e.postConcat(d); |
| 145 | REPORTER_ASSERT(reporter, nearly_equal_double(32, e.determinant())); |
| 146 | e.set(0, 0, SkFloatToMScalar(0)); |
| 147 | REPORTER_ASSERT(reporter, nearly_equal_double(0, e.determinant())); |
| 148 | } |
| 149 | |
vollick@chromium.org | 9b21c25 | 2012-11-14 21:33:55 +0000 | [diff] [blame^] | 150 | static void test_transpose(skiatest::Reporter* reporter) { |
| 151 | SkMatrix44 a; |
| 152 | SkMatrix44 b; |
| 153 | |
| 154 | int i = 0; |
| 155 | for (int row = 0; row < 4; ++row) { |
| 156 | for (int col = 0; col < 4; ++col) { |
| 157 | a.setDouble(row, col, i); |
| 158 | b.setDouble(col, row, i++); |
| 159 | } |
| 160 | } |
| 161 | |
| 162 | a.transpose(); |
| 163 | REPORTER_ASSERT(reporter, nearly_equal(a, b)); |
| 164 | } |
| 165 | |
| 166 | static void test_get_set_double(skiatest::Reporter* reporter) { |
| 167 | SkMatrix44 a; |
| 168 | for (int row = 0; row < 4; ++row) { |
| 169 | for (int col = 0; col < 4; ++col) { |
| 170 | a.setDouble(row, col, 3.141592653589793); |
| 171 | REPORTER_ASSERT(reporter, nearly_equal_double(3.141592653589793, |
| 172 | a.getDouble(row, col))); |
| 173 | a.setDouble(row, col, 0); |
| 174 | REPORTER_ASSERT(reporter, nearly_equal_double(0, a.getDouble(row, col))); |
| 175 | } |
| 176 | } |
| 177 | } |
| 178 | |
caryclark@google.com | 42639cd | 2012-06-06 12:03:39 +0000 | [diff] [blame] | 179 | static void TestMatrix44(skiatest::Reporter* reporter) { |
reed@google.com | da9fac0 | 2011-06-13 14:46:52 +0000 | [diff] [blame] | 180 | #ifdef SK_SCALAR_IS_FLOAT |
reed@google.com | 125002a | 2011-06-09 19:13:41 +0000 | [diff] [blame] | 181 | SkMatrix44 mat, inverse, iden1, iden2, rot; |
| 182 | |
| 183 | mat.reset(); |
| 184 | mat.setTranslate(SK_Scalar1, SK_Scalar1, SK_Scalar1); |
| 185 | mat.invert(&inverse); |
| 186 | iden1.setConcat(mat, inverse); |
| 187 | REPORTER_ASSERT(reporter, is_identity(iden1)); |
| 188 | |
| 189 | mat.setScale(SkIntToScalar(2), SkIntToScalar(2), SkIntToScalar(2)); |
| 190 | mat.invert(&inverse); |
| 191 | iden1.setConcat(mat, inverse); |
| 192 | REPORTER_ASSERT(reporter, is_identity(iden1)); |
| 193 | |
| 194 | mat.setScale(SK_Scalar1/2, SK_Scalar1/2, SK_Scalar1/2); |
| 195 | mat.invert(&inverse); |
| 196 | iden1.setConcat(mat, inverse); |
| 197 | REPORTER_ASSERT(reporter, is_identity(iden1)); |
| 198 | |
| 199 | mat.setScale(SkIntToScalar(3), SkIntToScalar(5), SkIntToScalar(20)); |
| 200 | rot.setRotateDegreesAbout( |
| 201 | SkIntToScalar(0), |
| 202 | SkIntToScalar(0), |
| 203 | SkIntToScalar(-1), |
| 204 | SkIntToScalar(90)); |
| 205 | mat.postConcat(rot); |
| 206 | REPORTER_ASSERT(reporter, mat.invert(NULL)); |
| 207 | mat.invert(&inverse); |
| 208 | iden1.setConcat(mat, inverse); |
| 209 | REPORTER_ASSERT(reporter, is_identity(iden1)); |
| 210 | iden2.setConcat(inverse, mat); |
| 211 | REPORTER_ASSERT(reporter, is_identity(iden2)); |
reed@google.com | da9fac0 | 2011-06-13 14:46:52 +0000 | [diff] [blame] | 212 | |
| 213 | // test rol/col Major getters |
| 214 | { |
| 215 | mat.setTranslate(2, 3, 4); |
| 216 | float dataf[16]; |
| 217 | double datad[16]; |
rmistry@google.com | d6176b0 | 2012-08-23 18:14:13 +0000 | [diff] [blame] | 218 | |
reed@google.com | da9fac0 | 2011-06-13 14:46:52 +0000 | [diff] [blame] | 219 | mat.asColMajorf(dataf); |
| 220 | assert16<float>(reporter, dataf, |
| 221 | 1, 0, 0, 0, |
| 222 | 0, 1, 0, 0, |
| 223 | 0, 0, 1, 0, |
| 224 | 2, 3, 4, 1); |
| 225 | mat.asColMajord(datad); |
| 226 | assert16<double>(reporter, datad, 1, 0, 0, 0, |
| 227 | 0, 1, 0, 0, |
| 228 | 0, 0, 1, 0, |
| 229 | 2, 3, 4, 1); |
| 230 | mat.asRowMajorf(dataf); |
| 231 | assert16<float>(reporter, dataf, 1, 0, 0, 2, |
| 232 | 0, 1, 0, 3, |
| 233 | 0, 0, 1, 4, |
| 234 | 0, 0, 0, 1); |
| 235 | mat.asRowMajord(datad); |
| 236 | assert16<double>(reporter, datad, 1, 0, 0, 2, |
| 237 | 0, 1, 0, 3, |
| 238 | 0, 0, 1, 4, |
| 239 | 0, 0, 0, 1); |
| 240 | } |
reed@google.com | 6f2b44d | 2011-06-24 18:13:39 +0000 | [diff] [blame] | 241 | |
reed@google.com | 80b577e | 2012-11-09 21:25:06 +0000 | [diff] [blame] | 242 | test_concat(reporter); |
| 243 | |
caryclark@google.com | 42639cd | 2012-06-06 12:03:39 +0000 | [diff] [blame] | 244 | if (false) { // avoid bit rot, suppress warning (working on making this pass) |
| 245 | test_common_angles(reporter); |
| 246 | } |
vollick@chromium.org | 3959a76 | 2012-11-13 15:08:22 +0000 | [diff] [blame] | 247 | |
| 248 | test_determinant(reporter); |
vollick@chromium.org | 9b21c25 | 2012-11-14 21:33:55 +0000 | [diff] [blame^] | 249 | test_transpose(reporter); |
| 250 | test_get_set_double(reporter); |
reed@google.com | da9fac0 | 2011-06-13 14:46:52 +0000 | [diff] [blame] | 251 | #endif |
reed@google.com | 125002a | 2011-06-09 19:13:41 +0000 | [diff] [blame] | 252 | } |
| 253 | |
| 254 | #include "TestClassDef.h" |
| 255 | DEFINE_TESTCLASS("Matrix44", Matrix44TestClass, TestMatrix44) |