55 lines
1.4 KiB
HTML
55 lines
1.4 KiB
HTML
<!DOCTYPE HTML PUBLIC "-//IETF//DTD HTML//EN">
|
|
<html>
|
|
<head>
|
|
<script src="../../resources/js-test-pre.js"></script>
|
|
</head>
|
|
<body>
|
|
<canvas id="canvas" width="100" height="100"></canvas>
|
|
<script>
|
|
description("Bug 55696: Series of tests to ensure zero-length arc extends current subpath");
|
|
var ctx = document.getElementById('canvas').getContext('2d');
|
|
ctx.lineWidth = 4;
|
|
|
|
function shouldBeBlackPixel(x,y)
|
|
{
|
|
var data = ctx.getImageData(x, y, 1, 1).data;
|
|
if (data[0] != 0 || data[1] != 0 || data[2] != 0 || data[3] != 255) {
|
|
testFailed("Pixel (" + x + "," + y + ") should be black; " +
|
|
"was [" + data[0] + "," + data[1] + "," + data[2] + "," + data[3] + "]");
|
|
} else {
|
|
testPassed("Pixel (" + x + "," + y + ") is black.");
|
|
}
|
|
}
|
|
|
|
// moveTo + empty arc (swing == 0)
|
|
ctx.beginPath();
|
|
ctx.moveTo(20, 20);
|
|
ctx.arc(80, 30, 10, -Math.PI/2, -Math.PI/2, true);
|
|
ctx.stroke();
|
|
shouldBeBlackPixel(50, 20);
|
|
|
|
// moveTo + empty arc (radius == 0)
|
|
ctx.beginPath();
|
|
ctx.moveTo(20, 40);
|
|
ctx.arc(80, 40, 0, 0, 6, false);
|
|
ctx.stroke();
|
|
shouldBeBlackPixel(50, 40)
|
|
|
|
// empty arc (swing == 0) + lineTo
|
|
ctx.beginPath();
|
|
ctx.arc(20, 50, 10, Math.PI/2, Math.PI/2, false);
|
|
ctx.lineTo(80, 60);
|
|
ctx.stroke();
|
|
shouldBeBlackPixel(50, 60);
|
|
|
|
// empty arc (radius == 0) + lineTo
|
|
ctx.beginPath();
|
|
ctx.arc(20, 80, 0, 0, 6, false);
|
|
ctx.lineTo(80, 80);
|
|
ctx.stroke();
|
|
shouldBeBlackPixel(50, 80);
|
|
</script>
|
|
<script src="../../resources/js-test-post.js"></script>
|
|
</body>
|
|
</html>
|