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