mirror of
https://github.com/classilla/tenfourfox.git
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54 lines
1.6 KiB
HTML
54 lines
1.6 KiB
HTML
<html>
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<head>
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<script type="text/javascript">
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function assert(cond, msg) { if (!cond) { throw msg; } }
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function isSameTM(m1, m2) {
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// XXX this is probably the ugliest possible way to write this function,
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// but it's intended to be lowest-common-denominator
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if (!(m1.length === 6 && m1.length === m2.length)) {
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return false;
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}
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for (var i = 0; i < m1.length; ++i) {
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if (m1[i] !== m2[i]) {
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return false;
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}
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}
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return true;
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}
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window.onload = function() {
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var IM = [ 1, 0, 0, 1, 0, 0 ];
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try {
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var ctx = document.getElementById("c1").getContext("2d");
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var singular = [ 0, 0, 0, 0, 0, 0 ];
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ctx.mozCurrentTransform = singular;
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assert(isSameTM(singular, ctx.mozCurrentTransform),
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"Expected setting CTM to a singular matrix to work");
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var inv = ctx.mozCurrentTransformInverse;
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assert(!isSameTM(inv, inv),
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"Expected to get back matrix of NaN's from currentTransformInverse");
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ctx.mozCurrentTransform = IM;
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var m = [ 1, 2, 3, 4, 5, 6 ];
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ctx.mozCurrentTransform = m;
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ctx.mozCurrentTransformInverse = singular;
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assert(isSameTM(m, ctx.mozCurrentTransform),
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"Setting currentTransformInverse to a singular matrix is a no-op");
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ctx.mozCurrentTransform = IM;
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} catch (e) {
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document.body.innerHTML = "FAIL: "+ e.toString();
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return;
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}
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document.body.innerHTML = "Pass";
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}
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</script>
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</head>
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<body>
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<div><canvas id="c1" width="300" height="300"></canvas></div>
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</body>
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</html>
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