1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000
1.2 +++ b/layout/reftests/canvas/ctm-sanity.html Wed Dec 31 06:09:35 2014 +0100
1.3 @@ -0,0 +1,83 @@
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 + assert(isSameTM(IM, ctx.mozCurrentTransform),
1.31 + "currentTransform is identity by default");
1.32 + assert(isSameTM(IM, ctx.mozCurrentTransformInverse),
1.33 + "currentTransformInverse is identity by default");
1.34 +
1.35 + var m = [ 1, 2, 3, 4, 5, 6 ];
1.36 + ctx.mozCurrentTransform = m;
1.37 + assert(isSameTM(m, ctx.mozCurrentTransform),
1.38 + "currentTransform successfully set");
1.39 + var badVals = [ -1,
1.40 + "string",
1.41 + { obj: true },
1.42 + [ "array of string" ],
1.43 + [ -1 ],
1.44 + [ "string", 1, 2, 3, 4, 5 ],
1.45 + [ { obj: true }, 1, 2, 3, 4, 5 ],
1.46 + ];
1.47 + for (var i = 0; i < badVals.length; ++i) {
1.48 + var error = false;
1.49 + try { ctx.mozCurrentTransform = badVals[i]; }
1.50 + catch(e) { error = true; }
1.51 + assert(error && isSameTM(m, ctx.mozCurrentTransform),
1.52 + "Expected |currentTransform = "+ badVals[i] +"| to throw exception and not change .currentTransform");
1.53 +
1.54 + error = false;
1.55 + try { ctx.mozCurrentTransformInverse = badVals[i]; }
1.56 + catch(e) { error = true; }
1.57 + assert(error && isSameTM(m, ctx.mozCurrentTransform),
1.58 + "Expected |currentTransformInverse = "+ badVals[i] +"| to throw exception and not change .currentTransform");
1.59 + }
1.60 + ctx.mozCurrentTransform = IM;
1.61 +
1.62 + var noopVals = [ [ Number.NaN, 1, 2, 3, 4, 5 ],
1.63 + [ Infinity, 1, 2, 3, 4, 5 ],
1.64 + ];
1.65 + for (var i = 0; i < noopVals.length; ++i) {
1.66 + ctx.mozCurrentTransform = noopVals[i];
1.67 + assert(isSameTM(ctx.mozCurrentTransform, IM),
1.68 + "Illegal float values result in no-ops (sigh)");
1.69 + }
1.70 + ctx.mozCurrentTransform = IM;
1.71 +
1.72 + ctx.setTransform(m[0], m[1], m[2], m[3], m[4], m[5]);
1.73 + assert(isSameTM(ctx.mozCurrentTransform, m),
1.74 + "setTransform() updates currentTransform");
1.75 + } catch (e) {
1.76 + document.body.innerHTML = "FAIL: "+ e.toString();
1.77 + return;
1.78 + }
1.79 + document.body.innerHTML = "Pass";
1.80 +}
1.81 + </script>
1.82 +</head>
1.83 +<body>
1.84 + <div><canvas id="c1" width="300" height="300"></canvas></div>
1.85 +</body>
1.86 +</html>
