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<!DOCTYPE HTML>
<title>Canvas test: 2d.drawImage.zerocanvas</title>
<script src="/tests/SimpleTest/SimpleTest.js"></script>
<link rel="stylesheet" href="/tests/SimpleTest/test.css">
<body>
<canvas id="c" width="100" height="50"><p class="fallback">FAIL (fallback content)</p></canvas>
<script>
function isPixel(ctx, x,y, r,g,b,a, pos, colour, d) {
var pixel = ctx.getImageData(x, y, 1, 1);
var pr = pixel.data[0],
pg = pixel.data[1],
pb = pixel.data[2],
pa = pixel.data[3];
ok(r-d <= pr && pr <= r+d &&
g-d <= pg && pg <= g+d &&
b-d <= pb && pb <= b+d &&
a-d <= pa && pa <= a+d,
"pixel "+pos+" is "+pr+","+pg+","+pb+","+pa+"; expected "+colour+" +/- "+d);
}
SimpleTest.waitForExplicitFinish();
addLoadEvent(function () {
var canvas = document.getElementById('c');
var ctx = canvas.getContext('2d');
ctx.fillStyle = '#0f0';
ctx.fillRect(0, 0, 100, 50);
var canvas2 = document.createElement('canvas');
canvas2.width = 0;
canvas2.height = 10;
var _thrown = undefined; try {
ctx.drawImage(canvas2, 0, 0);
} catch (e) { _thrown = e }; ok(_thrown && _thrown.name == "InvalidStateError" && _thrown.code == DOMException.INVALID_STATE_ERR, "should throw InvalidStateError");
canvas2.width = 10;
canvas2.height = 0;
var _thrown = undefined; try {
ctx.drawImage(canvas2, 0, 0);
} catch (e) { _thrown = e }; ok(_thrown && _thrown.name == "InvalidStateError" && _thrown.code == DOMException.INVALID_STATE_ERR, "should throw InvalidStateError");
canvas2.width = 0;
canvas2.height = 0;
var _thrown = undefined; try {
ctx.drawImage(canvas2, 0, 0);
} catch (e) { _thrown = e }; ok(_thrown && _thrown.name == "InvalidStateError" && _thrown.code == DOMException.INVALID_STATE_ERR, "should throw InvalidStateError");
isPixel(ctx, 50,25, 0,255,0,255, "50,25", "0,255,0,255", 2);
SimpleTest.finish();
});
</script>
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