84 lines
2.8 KiB
HTML
84 lines
2.8 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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assert(isSameTM(IM, ctx.mozCurrentTransform),
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"currentTransform is identity by default");
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assert(isSameTM(IM, ctx.mozCurrentTransformInverse),
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"currentTransformInverse is identity by default");
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var m = [ 1, 2, 3, 4, 5, 6 ];
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ctx.mozCurrentTransform = m;
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assert(isSameTM(m, ctx.mozCurrentTransform),
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"currentTransform successfully set");
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var badVals = [ -1,
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"string",
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{ obj: true },
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[ "array of string" ],
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[ -1 ],
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[ "string", 1, 2, 3, 4, 5 ],
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[ { obj: true }, 1, 2, 3, 4, 5 ],
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];
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for (var i = 0; i < badVals.length; ++i) {
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var error = false;
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try { ctx.mozCurrentTransform = badVals[i]; }
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catch(e) { error = true; }
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assert(error && isSameTM(m, ctx.mozCurrentTransform),
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"Expected |currentTransform = "+ badVals[i] +"| to throw exception and not change .currentTransform");
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error = false;
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try { ctx.mozCurrentTransformInverse = badVals[i]; }
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catch(e) { error = true; }
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assert(error && isSameTM(m, ctx.mozCurrentTransform),
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"Expected |currentTransformInverse = "+ badVals[i] +"| to throw exception and not change .currentTransform");
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}
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ctx.mozCurrentTransform = IM;
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var noopVals = [ [ Number.NaN, 1, 2, 3, 4, 5 ],
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[ Infinity, 1, 2, 3, 4, 5 ],
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];
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for (var i = 0; i < noopVals.length; ++i) {
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ctx.mozCurrentTransform = noopVals[i];
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assert(isSameTM(ctx.mozCurrentTransform, IM),
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"Illegal float values result in no-ops (sigh)");
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}
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ctx.mozCurrentTransform = IM;
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ctx.setTransform(m[0], m[1], m[2], m[3], m[4], m[5]);
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assert(isSameTM(ctx.mozCurrentTransform, m),
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"setTransform() updates currentTransform");
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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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