60 lines
1.3 KiB
HTML
60 lines
1.3 KiB
HTML
<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>
|