1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000
1.2 +++ b/layout/reftests/canvas/ctm-singular-sanity.html Wed Dec 31 06:09:35 2014 +0100
1.3 @@ -0,0 +1,53 @@
1.4 +<html>
1.5 +<head>
1.6 + <script type="text/javascript">
1.7 +
1.8 +function assert(cond, msg) { if (!cond) { throw msg; } }
1.9 +
1.10 +function isSameTM(m1, m2) {
1.11 + // XXX this is probably the ugliest possible way to write this function,
1.12 + // but it's intended to be lowest-common-denominator
1.13 + if (!(m1.length === 6 && m1.length === m2.length)) {
1.14 + return false;
1.15 + }
1.16 + for (var i = 0; i < m1.length; ++i) {
1.17 + if (m1[i] !== m2[i]) {
1.18 + return false;
1.19 + }
1.20 + }
1.21 + return true;
1.22 +}
1.23 +
1.24 +window.onload = function() {
1.25 + var IM = [ 1, 0, 0, 1, 0, 0 ];
1.26 +
1.27 + try {
1.28 + var ctx = document.getElementById("c1").getContext("2d");
1.29 +
1.30 + var singular = [ 0, 0, 0, 0, 0, 0 ];
1.31 + ctx.mozCurrentTransform = singular;
1.32 + assert(isSameTM(singular, ctx.mozCurrentTransform),
1.33 + "Expected setting CTM to a singular matrix to work");
1.34 + var inv = ctx.mozCurrentTransformInverse;
1.35 + assert(!isSameTM(inv, inv),
1.36 + "Expected to get back matrix of NaN's from currentTransformInverse");
1.37 + ctx.mozCurrentTransform = IM;
1.38 +
1.39 + var m = [ 1, 2, 3, 4, 5, 6 ];
1.40 + ctx.mozCurrentTransform = m;
1.41 + ctx.mozCurrentTransformInverse = singular;
1.42 + assert(isSameTM(m, ctx.mozCurrentTransform),
1.43 + "Setting currentTransformInverse to a singular matrix is a no-op");
1.44 + ctx.mozCurrentTransform = IM;
1.45 + } catch (e) {
1.46 + document.body.innerHTML = "FAIL: "+ e.toString();
1.47 + return;
1.48 + }
1.49 + document.body.innerHTML = "Pass";
1.50 +}
1.51 + </script>
1.52 +</head>
1.53 +<body>
1.54 + <div><canvas id="c1" width="300" height="300"></canvas></div>
1.55 +</body>
1.56 +</html>
