reed@android.com | ed67331 | 2009-02-27 16:24:51 +0000 | [diff] [blame] | 1 | #include "Test.h" |
| 2 | #include "SkMatrix.h" |
| 3 | |
| 4 | static bool nearly_equal_scalar(SkScalar a, SkScalar b) { |
epoger@google.com | 2047f00 | 2011-05-17 17:36:59 +0000 | [diff] [blame^] | 5 | // Note that we get more compounded error for multiple operations when |
| 6 | // SK_SCALAR_IS_FIXED. |
reed@android.com | ed67331 | 2009-02-27 16:24:51 +0000 | [diff] [blame] | 7 | #ifdef SK_SCALAR_IS_FLOAT |
epoger@google.com | 2047f00 | 2011-05-17 17:36:59 +0000 | [diff] [blame^] | 8 | const SkScalar tolerance = SK_Scalar1 / 200000; |
reed@android.com | ed67331 | 2009-02-27 16:24:51 +0000 | [diff] [blame] | 9 | #else |
epoger@google.com | 2047f00 | 2011-05-17 17:36:59 +0000 | [diff] [blame^] | 10 | const SkScalar tolerance = SK_Scalar1 / 1024; |
reed@android.com | ed67331 | 2009-02-27 16:24:51 +0000 | [diff] [blame] | 11 | #endif |
| 12 | |
| 13 | return SkScalarAbs(a - b) <= tolerance; |
| 14 | } |
| 15 | |
| 16 | static bool nearly_equal(const SkMatrix& a, const SkMatrix& b) { |
| 17 | for (int i = 0; i < 9; i++) { |
| 18 | if (!nearly_equal_scalar(a[i], b[i])) { |
reed@android.com | d413445 | 2011-02-09 02:24:26 +0000 | [diff] [blame] | 19 | printf("not equal %g %g\n", (float)a[i], (float)b[i]); |
reed@android.com | ed67331 | 2009-02-27 16:24:51 +0000 | [diff] [blame] | 20 | return false; |
| 21 | } |
| 22 | } |
| 23 | return true; |
| 24 | } |
| 25 | |
| 26 | static bool is_identity(const SkMatrix& m) { |
| 27 | SkMatrix identity; |
reed@android.com | 80e39a7 | 2009-04-02 16:59:40 +0000 | [diff] [blame] | 28 | identity.reset(); |
reed@android.com | ed67331 | 2009-02-27 16:24:51 +0000 | [diff] [blame] | 29 | return nearly_equal(m, identity); |
| 30 | } |
| 31 | |
reed@android.com | 4b7577b | 2009-06-29 16:14:41 +0000 | [diff] [blame] | 32 | static void test_flatten(skiatest::Reporter* reporter, const SkMatrix& m) { |
| 33 | // add 100 in case we have a bug, I don't want to kill my stack in the test |
| 34 | char buffer[SkMatrix::kMaxFlattenSize + 100]; |
| 35 | uint32_t size1 = m.flatten(NULL); |
| 36 | uint32_t size2 = m.flatten(buffer); |
| 37 | REPORTER_ASSERT(reporter, size1 == size2); |
| 38 | REPORTER_ASSERT(reporter, size1 <= SkMatrix::kMaxFlattenSize); |
| 39 | |
| 40 | SkMatrix m2; |
| 41 | uint32_t size3 = m2.unflatten(buffer); |
| 42 | REPORTER_ASSERT(reporter, size1 == size2); |
| 43 | REPORTER_ASSERT(reporter, m == m2); |
| 44 | |
| 45 | char buffer2[SkMatrix::kMaxFlattenSize + 100]; |
| 46 | size3 = m2.flatten(buffer2); |
| 47 | REPORTER_ASSERT(reporter, size1 == size2); |
| 48 | REPORTER_ASSERT(reporter, memcmp(buffer, buffer2, size1) == 0); |
| 49 | } |
| 50 | |
reed@android.com | ed67331 | 2009-02-27 16:24:51 +0000 | [diff] [blame] | 51 | void TestMatrix(skiatest::Reporter* reporter) { |
| 52 | SkMatrix mat, inverse, iden1, iden2; |
| 53 | |
| 54 | mat.reset(); |
| 55 | mat.setTranslate(SK_Scalar1, SK_Scalar1); |
| 56 | mat.invert(&inverse); |
| 57 | iden1.setConcat(mat, inverse); |
| 58 | REPORTER_ASSERT(reporter, is_identity(iden1)); |
| 59 | |
| 60 | mat.setScale(SkIntToScalar(2), SkIntToScalar(2)); |
| 61 | mat.invert(&inverse); |
| 62 | iden1.setConcat(mat, inverse); |
| 63 | REPORTER_ASSERT(reporter, is_identity(iden1)); |
reed@android.com | 4b7577b | 2009-06-29 16:14:41 +0000 | [diff] [blame] | 64 | test_flatten(reporter, mat); |
reed@android.com | ed67331 | 2009-02-27 16:24:51 +0000 | [diff] [blame] | 65 | |
| 66 | mat.setScale(SK_Scalar1/2, SK_Scalar1/2); |
| 67 | mat.invert(&inverse); |
| 68 | iden1.setConcat(mat, inverse); |
| 69 | REPORTER_ASSERT(reporter, is_identity(iden1)); |
reed@android.com | 4b7577b | 2009-06-29 16:14:41 +0000 | [diff] [blame] | 70 | test_flatten(reporter, mat); |
reed@android.com | ed67331 | 2009-02-27 16:24:51 +0000 | [diff] [blame] | 71 | |
| 72 | mat.setScale(SkIntToScalar(3), SkIntToScalar(5), SkIntToScalar(20), 0); |
| 73 | mat.postRotate(SkIntToScalar(25)); |
| 74 | REPORTER_ASSERT(reporter, mat.invert(NULL)); |
| 75 | mat.invert(&inverse); |
| 76 | iden1.setConcat(mat, inverse); |
| 77 | REPORTER_ASSERT(reporter, is_identity(iden1)); |
| 78 | iden2.setConcat(inverse, mat); |
| 79 | REPORTER_ASSERT(reporter, is_identity(iden2)); |
reed@android.com | 4b7577b | 2009-06-29 16:14:41 +0000 | [diff] [blame] | 80 | test_flatten(reporter, mat); |
| 81 | test_flatten(reporter, iden2); |
reed@android.com | 80e39a7 | 2009-04-02 16:59:40 +0000 | [diff] [blame] | 82 | |
reed@android.com | ed67331 | 2009-02-27 16:24:51 +0000 | [diff] [blame] | 83 | // rectStaysRect test |
| 84 | { |
| 85 | static const struct { |
| 86 | SkScalar m00, m01, m10, m11; |
| 87 | bool mStaysRect; |
| 88 | } |
| 89 | gRectStaysRectSamples[] = { |
| 90 | { 0, 0, 0, 0, false }, |
| 91 | { 0, 0, 0, SK_Scalar1, false }, |
| 92 | { 0, 0, SK_Scalar1, 0, false }, |
| 93 | { 0, 0, SK_Scalar1, SK_Scalar1, false }, |
| 94 | { 0, SK_Scalar1, 0, 0, false }, |
| 95 | { 0, SK_Scalar1, 0, SK_Scalar1, false }, |
| 96 | { 0, SK_Scalar1, SK_Scalar1, 0, true }, |
| 97 | { 0, SK_Scalar1, SK_Scalar1, SK_Scalar1, false }, |
| 98 | { SK_Scalar1, 0, 0, 0, false }, |
| 99 | { SK_Scalar1, 0, 0, SK_Scalar1, true }, |
| 100 | { SK_Scalar1, 0, SK_Scalar1, 0, false }, |
| 101 | { SK_Scalar1, 0, SK_Scalar1, SK_Scalar1, false }, |
| 102 | { SK_Scalar1, SK_Scalar1, 0, 0, false }, |
| 103 | { SK_Scalar1, SK_Scalar1, 0, SK_Scalar1, false }, |
| 104 | { SK_Scalar1, SK_Scalar1, SK_Scalar1, 0, false }, |
| 105 | { SK_Scalar1, SK_Scalar1, SK_Scalar1, SK_Scalar1, false } |
| 106 | }; |
reed@android.com | 80e39a7 | 2009-04-02 16:59:40 +0000 | [diff] [blame] | 107 | |
reed@android.com | ed67331 | 2009-02-27 16:24:51 +0000 | [diff] [blame] | 108 | for (size_t i = 0; i < SK_ARRAY_COUNT(gRectStaysRectSamples); i++) { |
| 109 | SkMatrix m; |
reed@android.com | 80e39a7 | 2009-04-02 16:59:40 +0000 | [diff] [blame] | 110 | |
reed@android.com | ed67331 | 2009-02-27 16:24:51 +0000 | [diff] [blame] | 111 | m.reset(); |
| 112 | m.set(SkMatrix::kMScaleX, gRectStaysRectSamples[i].m00); |
| 113 | m.set(SkMatrix::kMSkewX, gRectStaysRectSamples[i].m01); |
| 114 | m.set(SkMatrix::kMSkewY, gRectStaysRectSamples[i].m10); |
| 115 | m.set(SkMatrix::kMScaleY, gRectStaysRectSamples[i].m11); |
| 116 | REPORTER_ASSERT(reporter, |
| 117 | m.rectStaysRect() == gRectStaysRectSamples[i].mStaysRect); |
| 118 | } |
| 119 | } |
| 120 | } |
| 121 | |
reed@android.com | d8730ea | 2009-02-27 22:06:06 +0000 | [diff] [blame] | 122 | #include "TestClassDef.h" |
| 123 | DEFINE_TESTCLASS("Matrix", MatrixTestClass, TestMatrix) |