| <!DOCTYPE html> |
| <title>Test DOMMatrix.inverse()/invertSelf() keep is2D status</title> |
| <link rel="help" href="https://drafts.fxtf.org/geometry-1/#DOMMatrix"> |
| <script src="/resources/testharness.js"></script> |
| <script src="/resources/testharnessreport.js"></script> |
| <script> |
| function check2D(m) { |
| assert_true(m.is2D); |
| // assert_equals() distinguish 0 and -0, so use '== 0' instead. |
| assert_true(m.m13 == 0); |
| assert_true(m.m14 == 0); |
| assert_true(m.m23 == 0); |
| assert_true(m.m24 == 0); |
| assert_true(m.m31 == 0); |
| assert_true(m.m32 == 0); |
| assert_equals(m.m33, 1); |
| assert_true(m.m34 == 0); |
| assert_true(m.m43 == 0); |
| assert_equals(m.m44, 1); |
| } |
| |
| test(function() { |
| for (var s = 0.1; s < 20; s += 0.1) { |
| m = new DOMMatrix().scale(s, s); |
| check2D(m); |
| check2D(m.inverse()); |
| m.invertSelf(); |
| check2D(m); |
| } |
| }, "scale"); |
| |
| test(function() { |
| for (var r = 0; r < 180; r += 2) { |
| m = new DOMMatrix().rotate(r); |
| check2D(m); |
| check2D(m.inverse()); |
| m.invertSelf(); |
| check2D(m); |
| } |
| }, "rotate"); |
| </script> |
