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| author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-21 11:44:51 +0000 |
|---|---|---|
| committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-21 11:44:51 +0000 |
| commit | 9e3c08db40b8916968b9f30096c7be3f00ce9647 (patch) | |
| tree | a68f146d7fa01f0134297619fbe7e33db084e0aa /layout/reftests/canvas/ctm-singular-sanity.html | |
| parent | Initial commit. (diff) | |
| download | thunderbird-upstream.tar.xz thunderbird-upstream.zip | |
Adding upstream version 1:115.7.0.upstream/1%115.7.0upstream
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to '')
| -rw-r--r-- | layout/reftests/canvas/ctm-singular-sanity.html | 60 |
1 files changed, 60 insertions, 0 deletions
diff --git a/layout/reftests/canvas/ctm-singular-sanity.html b/layout/reftests/canvas/ctm-singular-sanity.html new file mode 100644 index 0000000000..48617d7628 --- /dev/null +++ b/layout/reftests/canvas/ctm-singular-sanity.html @@ -0,0 +1,60 @@ +<html> +<head> + <script type="text/javascript"> +function assert(cond, msg) { + if (!cond) { + throw msg; + } +} + +assert.equal = function(m1, m2, msg) { + assert( + m1.is2D && + m2.is2D && + m1.a === m2.a && + m1.b === m2.b && + m1.c === m2.c && + m1.d === m2.d && + m1.e === m2.e && + m1.f === m2.f, + msg + ); +}; + +window.onload = function() { + try { + var ctx = document.getElementById("c1").getContext("2d"); + + var singular = new DOMMatrix([0, 0, 0, 0, 0, 0]); + ctx.setTransform(singular); + assert.equal( + ctx.getTransform(), + singular, + "Expected setting transform to a singular matrix to work" + ); + var inv = ctx.getTransform().invertSelf(); + assert( + isNaN(inv.a) && isNaN(inv.b) && isNaN(inv.c) && isNaN(inv.d), + "Expected to get back matrix of NaN's from inverse transform" + ); + + var m = new DOMMatrix([1, 2, 3, 4, 5, 6]); + ctx.setTransform(m); + ctx.setTransform(singular.invertSelf()); + assert.equal( + ctx.getTransform(), + m, + "Setting transform to an inverse singular matrix is a no-op" + ); + } catch (e) { + document.body.innerHTML = "FAIL: " + e.toString(); + return; + } + document.body.innerHTML = "Pass"; +}; + </script> +</head> +<body> + <div><canvas id="c1" width="300" height="300"></canvas></div> +</body> +</html> |