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) { |
| 5 | #ifdef SK_SCALAR_IS_FLOAT |
| 6 | const float tolerance = 0.000005f; |
| 7 | #else |
| 8 | const int32_t tolerance = 3; |
| 9 | #endif |
| 10 | |
| 11 | return SkScalarAbs(a - b) <= tolerance; |
| 12 | } |
| 13 | |
| 14 | static bool nearly_equal(const SkMatrix& a, const SkMatrix& b) { |
| 15 | for (int i = 0; i < 9; i++) { |
| 16 | if (!nearly_equal_scalar(a[i], b[i])) { |
| 17 | printf("not equal %g %g\n", a[i], b[i]); |
| 18 | return false; |
| 19 | } |
| 20 | } |
| 21 | return true; |
| 22 | } |
| 23 | |
| 24 | static bool is_identity(const SkMatrix& m) { |
| 25 | SkMatrix identity; |
| 26 | identity.reset(); |
| 27 | return nearly_equal(m, identity); |
| 28 | } |
| 29 | |
| 30 | void TestMatrix(skiatest::Reporter* reporter) { |
| 31 | SkMatrix mat, inverse, iden1, iden2; |
| 32 | |
| 33 | mat.reset(); |
| 34 | mat.setTranslate(SK_Scalar1, SK_Scalar1); |
| 35 | mat.invert(&inverse); |
| 36 | iden1.setConcat(mat, inverse); |
| 37 | REPORTER_ASSERT(reporter, is_identity(iden1)); |
| 38 | |
| 39 | mat.setScale(SkIntToScalar(2), SkIntToScalar(2)); |
| 40 | mat.invert(&inverse); |
| 41 | iden1.setConcat(mat, inverse); |
| 42 | REPORTER_ASSERT(reporter, is_identity(iden1)); |
| 43 | |
| 44 | mat.setScale(SK_Scalar1/2, SK_Scalar1/2); |
| 45 | mat.invert(&inverse); |
| 46 | iden1.setConcat(mat, inverse); |
| 47 | REPORTER_ASSERT(reporter, is_identity(iden1)); |
| 48 | |
| 49 | mat.setScale(SkIntToScalar(3), SkIntToScalar(5), SkIntToScalar(20), 0); |
| 50 | mat.postRotate(SkIntToScalar(25)); |
| 51 | REPORTER_ASSERT(reporter, mat.invert(NULL)); |
| 52 | mat.invert(&inverse); |
| 53 | iden1.setConcat(mat, inverse); |
| 54 | REPORTER_ASSERT(reporter, is_identity(iden1)); |
| 55 | iden2.setConcat(inverse, mat); |
| 56 | REPORTER_ASSERT(reporter, is_identity(iden2)); |
| 57 | |
| 58 | // rectStaysRect test |
| 59 | { |
| 60 | static const struct { |
| 61 | SkScalar m00, m01, m10, m11; |
| 62 | bool mStaysRect; |
| 63 | } |
| 64 | gRectStaysRectSamples[] = { |
| 65 | { 0, 0, 0, 0, false }, |
| 66 | { 0, 0, 0, SK_Scalar1, false }, |
| 67 | { 0, 0, SK_Scalar1, 0, false }, |
| 68 | { 0, 0, SK_Scalar1, SK_Scalar1, false }, |
| 69 | { 0, SK_Scalar1, 0, 0, false }, |
| 70 | { 0, SK_Scalar1, 0, SK_Scalar1, false }, |
| 71 | { 0, SK_Scalar1, SK_Scalar1, 0, true }, |
| 72 | { 0, SK_Scalar1, SK_Scalar1, SK_Scalar1, false }, |
| 73 | { SK_Scalar1, 0, 0, 0, false }, |
| 74 | { SK_Scalar1, 0, 0, SK_Scalar1, true }, |
| 75 | { SK_Scalar1, 0, SK_Scalar1, 0, false }, |
| 76 | { SK_Scalar1, 0, SK_Scalar1, SK_Scalar1, false }, |
| 77 | { SK_Scalar1, SK_Scalar1, 0, 0, false }, |
| 78 | { SK_Scalar1, SK_Scalar1, 0, SK_Scalar1, false }, |
| 79 | { SK_Scalar1, SK_Scalar1, SK_Scalar1, 0, false }, |
| 80 | { SK_Scalar1, SK_Scalar1, SK_Scalar1, SK_Scalar1, false } |
| 81 | }; |
| 82 | |
| 83 | for (size_t i = 0; i < SK_ARRAY_COUNT(gRectStaysRectSamples); i++) { |
| 84 | SkMatrix m; |
| 85 | |
| 86 | m.reset(); |
| 87 | m.set(SkMatrix::kMScaleX, gRectStaysRectSamples[i].m00); |
| 88 | m.set(SkMatrix::kMSkewX, gRectStaysRectSamples[i].m01); |
| 89 | m.set(SkMatrix::kMSkewY, gRectStaysRectSamples[i].m10); |
| 90 | m.set(SkMatrix::kMScaleY, gRectStaysRectSamples[i].m11); |
| 91 | REPORTER_ASSERT(reporter, |
| 92 | m.rectStaysRect() == gRectStaysRectSamples[i].mStaysRect); |
| 93 | } |
| 94 | } |
| 95 | } |
| 96 | |
| 97 | /////////////////////////////////////////////////////////////////////////////// |
| 98 | |
| 99 | namespace skiatest { |
| 100 | |
| 101 | class MatrixTest : public Test { |
| 102 | public: |
| 103 | static Test* Factory(void*) { |
| 104 | return SkNEW(MatrixTest); |
| 105 | } |
| 106 | |
| 107 | protected: |
| 108 | virtual void onGetName(SkString* name) { |
| 109 | name->set("Matrix"); |
| 110 | } |
| 111 | |
| 112 | virtual void onRun(Reporter* reporter) { |
| 113 | TestMatrix(reporter); |
| 114 | } |
| 115 | }; |
| 116 | |
| 117 | static TestRegistry gReg(MatrixTest::Factory); |
| 118 | } |
| 119 | |