/usr/share/doc/libjs-excanvas/examples/testcases/linewidth.html is in libjs-excanvas 0.r3-3.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 | <!DOCTYPE html>
<html>
<head>
<title>Line Width Test</title>
<style>
body {
text-align: center
}
</style>
<!--[if IE]><script type="text/javascript" src="../excanvas.js"></script><![endif]-->
<script>
window.onload = function() {
var ctx = document.getElementById('c').getContext('2d');
ctx.strokeStyle = 'black';
ctx.lineWidth = 1;
for (var i = 0; i < 100; i++) {
ctx.beginPath();
ctx.moveTo(49 + i / 100, i);
ctx.lineTo(49 + i / 100, i + 1);
ctx.closePath();
ctx.stroke();
}
for (var i = 0; i < 100; i++) {
ctx.beginPath();
ctx.moveTo(i, 49 + i / 100);
ctx.lineTo(i + 1, 49 + i / 100);
ctx.closePath();
ctx.stroke();
}
};
</script>
</head>
<body>
<canvas id=c width=100 height=100></canvas>
<p>This tests that lines work in the same way in different browsers when you are
using sub pixel coordinates.</p>
</body>
</html>
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