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- <html>
- <head>
- <script type="text/javascript">
- function assert(cond, msg) { if (!cond) { throw msg; } }
- function isSameTM(m1, m2) {
- // XXX this is probably the ugliest possible way to write this function,
- // but it's intended to be lowest-common-denominator
- if (!(m1.length === 6 && m1.length === m2.length)) {
- return false;
- }
- for (var i = 0; i < m1.length; ++i) {
- if (m1[i] !== m2[i]) {
- return false;
- }
- }
- return true;
- }
- window.onload = function() {
- var IM = [ 1, 0, 0, 1, 0, 0 ];
- try {
- var ctx = document.getElementById("c1").getContext("2d");
- assert(isSameTM(IM, ctx.mozCurrentTransform),
- "currentTransform is identity by default");
- assert(isSameTM(IM, ctx.mozCurrentTransformInverse),
- "currentTransformInverse is identity by default");
- var m = [ 1, 2, 3, 4, 5, 6 ];
- ctx.mozCurrentTransform = m;
- assert(isSameTM(m, ctx.mozCurrentTransform),
- "currentTransform successfully set");
- var badVals = [ -1,
- "string",
- { obj: true },
- [ "array of string" ],
- [ -1 ],
- [ "string", 1, 2, 3, 4, 5 ],
- [ { obj: true }, 1, 2, 3, 4, 5 ],
- ];
- for (var i = 0; i < badVals.length; ++i) {
- var error = false;
- try { ctx.mozCurrentTransform = badVals[i]; }
- catch(e) { error = true; }
- assert(error && isSameTM(m, ctx.mozCurrentTransform),
- "Expected |currentTransform = "+ badVals[i] +"| to throw exception and not change .currentTransform");
- error = false;
- try { ctx.mozCurrentTransformInverse = badVals[i]; }
- catch(e) { error = true; }
- assert(error && isSameTM(m, ctx.mozCurrentTransform),
- "Expected |currentTransformInverse = "+ badVals[i] +"| to throw exception and not change .currentTransform");
- }
- ctx.mozCurrentTransform = IM;
- var noopVals = [ [ Number.NaN, 1, 2, 3, 4, 5 ],
- [ Infinity, 1, 2, 3, 4, 5 ],
- ];
- for (var i = 0; i < noopVals.length; ++i) {
- ctx.mozCurrentTransform = noopVals[i];
- assert(isSameTM(ctx.mozCurrentTransform, IM),
- "Illegal float values result in no-ops (sigh)");
- }
- ctx.mozCurrentTransform = IM;
- ctx.setTransform(m[0], m[1], m[2], m[3], m[4], m[5]);
- assert(isSameTM(ctx.mozCurrentTransform, m),
- "setTransform() updates currentTransform");
- } 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>
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