text-rtl-alignment-test.html

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<!DOCTYPE HTML>

<html>

<head>

<title>Test to ensure left/right and start/end are offset by text width for rtl text</title>

</head>

<body>

<canvas id="c" width="128" height="64" style="direction:rtl"></canvas>

<script type="text/javascript">

  var canvas = document.getElementById('c');

  var ctx = canvas.getContext('2d');

  ctx.fillStyle = 'black';

  ctx.font = '20px sans-serif';

  ctx.textBaseline = 'top';

  var str = 'TEXT';

  var wid = ctx.measureText(str).width;

  ctx.textAlign = 'right';

  ctx.fillText(str, 64+wid, 0);

  ctx.textAlign = 'end';

  ctx.fillText(str, 64-wid, 20);

  ctx.textAlign = 'left';

  ctx.fillText(str, 64-wid/2, 40);

</script>

</body>

</html>