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 | |
reed@google.com | da9fac0 | 2011-06-13 14:46:52 +0000 | [diff] [blame] | 11 | static bool nearly_equal_scalar(SkMScalar a, SkMScalar b) { |
reed@google.com | 125002a | 2011-06-09 19:13:41 +0000 | [diff] [blame] | 12 | // Note that we get more compounded error for multiple operations when |
| 13 | // SK_SCALAR_IS_FIXED. |
| 14 | #ifdef SK_SCALAR_IS_FLOAT |
| 15 | const SkScalar tolerance = SK_Scalar1 / 200000; |
| 16 | #else |
| 17 | const SkScalar tolerance = SK_Scalar1 / 1024; |
| 18 | #endif |
| 19 | |
| 20 | return SkScalarAbs(a - b) <= tolerance; |
| 21 | } |
| 22 | |
reed@google.com | da9fac0 | 2011-06-13 14:46:52 +0000 | [diff] [blame] | 23 | template <typename T> void assert16(skiatest::Reporter* reporter, const T data[], |
| 24 | T m0, T m1, T m2, T m3, |
| 25 | T m4, T m5, T m6, T m7, |
| 26 | T m8, T m9, T m10, T m11, |
| 27 | T m12, T m13, T m14, T m15) { |
| 28 | REPORTER_ASSERT(reporter, data[0] == m0); |
| 29 | REPORTER_ASSERT(reporter, data[1] == m1); |
| 30 | REPORTER_ASSERT(reporter, data[2] == m2); |
| 31 | REPORTER_ASSERT(reporter, data[3] == m3); |
| 32 | |
| 33 | REPORTER_ASSERT(reporter, data[4] == m4); |
| 34 | REPORTER_ASSERT(reporter, data[5] == m5); |
| 35 | REPORTER_ASSERT(reporter, data[6] == m6); |
| 36 | REPORTER_ASSERT(reporter, data[7] == m7); |
| 37 | |
| 38 | REPORTER_ASSERT(reporter, data[8] == m8); |
| 39 | REPORTER_ASSERT(reporter, data[9] == m9); |
| 40 | REPORTER_ASSERT(reporter, data[10] == m10); |
| 41 | REPORTER_ASSERT(reporter, data[11] == m11); |
| 42 | |
| 43 | REPORTER_ASSERT(reporter, data[12] == m12); |
| 44 | REPORTER_ASSERT(reporter, data[13] == m13); |
| 45 | REPORTER_ASSERT(reporter, data[14] == m14); |
| 46 | REPORTER_ASSERT(reporter, data[15] == m15); |
| 47 | } |
| 48 | |
reed@google.com | 125002a | 2011-06-09 19:13:41 +0000 | [diff] [blame] | 49 | static bool nearly_equal(const SkMatrix44& a, const SkMatrix44& b) { |
| 50 | for (int i = 0; i < 4; ++i) { |
| 51 | for (int j = 0; j < 4; ++j) { |
| 52 | 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] | 53 | 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] | 54 | return false; |
| 55 | } |
| 56 | } |
| 57 | } |
| 58 | return true; |
| 59 | } |
| 60 | |
| 61 | static bool is_identity(const SkMatrix44& m) { |
| 62 | SkMatrix44 identity; |
| 63 | identity.reset(); |
| 64 | return nearly_equal(m, identity); |
| 65 | } |
| 66 | |
reed@google.com | 6f2b44d | 2011-06-24 18:13:39 +0000 | [diff] [blame] | 67 | static void test_common_angles(skiatest::Reporter* reporter) { |
| 68 | SkMatrix44 rot; |
| 69 | // Test precision of rotation in common cases |
| 70 | int common_angles[] = { 0, 90, -90, 180, -180, 270, -270, 360, -360 }; |
| 71 | for (int i = 0; i < 9; ++i) { |
| 72 | rot.setRotateDegreesAbout(0, 0, -1, common_angles[i]); |
| 73 | |
| 74 | SkMatrix rot3x3 = rot; |
| 75 | REPORTER_ASSERT(reporter, rot3x3.rectStaysRect()); |
| 76 | } |
| 77 | } |
| 78 | |
reed@google.com | 125002a | 2011-06-09 19:13:41 +0000 | [diff] [blame] | 79 | void TestMatrix44(skiatest::Reporter* reporter) { |
reed@google.com | da9fac0 | 2011-06-13 14:46:52 +0000 | [diff] [blame] | 80 | #ifdef SK_SCALAR_IS_FLOAT |
reed@google.com | 125002a | 2011-06-09 19:13:41 +0000 | [diff] [blame] | 81 | SkMatrix44 mat, inverse, iden1, iden2, rot; |
| 82 | |
| 83 | mat.reset(); |
| 84 | mat.setTranslate(SK_Scalar1, SK_Scalar1, SK_Scalar1); |
| 85 | mat.invert(&inverse); |
| 86 | iden1.setConcat(mat, inverse); |
| 87 | REPORTER_ASSERT(reporter, is_identity(iden1)); |
| 88 | |
| 89 | mat.setScale(SkIntToScalar(2), SkIntToScalar(2), SkIntToScalar(2)); |
| 90 | mat.invert(&inverse); |
| 91 | iden1.setConcat(mat, inverse); |
| 92 | REPORTER_ASSERT(reporter, is_identity(iden1)); |
| 93 | |
| 94 | mat.setScale(SK_Scalar1/2, SK_Scalar1/2, SK_Scalar1/2); |
| 95 | mat.invert(&inverse); |
| 96 | iden1.setConcat(mat, inverse); |
| 97 | REPORTER_ASSERT(reporter, is_identity(iden1)); |
| 98 | |
| 99 | mat.setScale(SkIntToScalar(3), SkIntToScalar(5), SkIntToScalar(20)); |
| 100 | rot.setRotateDegreesAbout( |
| 101 | SkIntToScalar(0), |
| 102 | SkIntToScalar(0), |
| 103 | SkIntToScalar(-1), |
| 104 | SkIntToScalar(90)); |
| 105 | mat.postConcat(rot); |
| 106 | REPORTER_ASSERT(reporter, mat.invert(NULL)); |
| 107 | mat.invert(&inverse); |
| 108 | iden1.setConcat(mat, inverse); |
| 109 | REPORTER_ASSERT(reporter, is_identity(iden1)); |
| 110 | iden2.setConcat(inverse, mat); |
| 111 | REPORTER_ASSERT(reporter, is_identity(iden2)); |
reed@google.com | da9fac0 | 2011-06-13 14:46:52 +0000 | [diff] [blame] | 112 | |
| 113 | // test rol/col Major getters |
| 114 | { |
| 115 | mat.setTranslate(2, 3, 4); |
| 116 | float dataf[16]; |
| 117 | double datad[16]; |
| 118 | |
| 119 | mat.asColMajorf(dataf); |
| 120 | assert16<float>(reporter, dataf, |
| 121 | 1, 0, 0, 0, |
| 122 | 0, 1, 0, 0, |
| 123 | 0, 0, 1, 0, |
| 124 | 2, 3, 4, 1); |
| 125 | mat.asColMajord(datad); |
| 126 | assert16<double>(reporter, datad, 1, 0, 0, 0, |
| 127 | 0, 1, 0, 0, |
| 128 | 0, 0, 1, 0, |
| 129 | 2, 3, 4, 1); |
| 130 | mat.asRowMajorf(dataf); |
| 131 | assert16<float>(reporter, dataf, 1, 0, 0, 2, |
| 132 | 0, 1, 0, 3, |
| 133 | 0, 0, 1, 4, |
| 134 | 0, 0, 0, 1); |
| 135 | mat.asRowMajord(datad); |
| 136 | assert16<double>(reporter, datad, 1, 0, 0, 2, |
| 137 | 0, 1, 0, 3, |
| 138 | 0, 0, 1, 4, |
| 139 | 0, 0, 0, 1); |
| 140 | } |
reed@google.com | 6f2b44d | 2011-06-24 18:13:39 +0000 | [diff] [blame] | 141 | |
| 142 | #if 0 // working on making this pass |
| 143 | test_common_angles(reporter); |
| 144 | #endif |
reed@google.com | da9fac0 | 2011-06-13 14:46:52 +0000 | [diff] [blame] | 145 | #endif |
reed@google.com | 125002a | 2011-06-09 19:13:41 +0000 | [diff] [blame] | 146 | } |
| 147 | |
| 148 | #include "TestClassDef.h" |
| 149 | DEFINE_TESTCLASS("Matrix44", Matrix44TestClass, TestMatrix44) |