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Mercurial (b6d82b1a6b02)

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<!DOCTYPE html>
<html>
  <head>
    <meta charset="UTF-8">
    <script>
      function draw() {
        var c = document.getElementById('c').getContext('2d');

        c.fillStyle = 'lime';
        c.fillRect(0, 0, 100, 50);

        var imgdata = c.createImageData(60, 50);
        for (var i = 0; i < imgdata.data.length; i += 4 * 60) {
            for (var x = i; x < i + 4 * 30; x += 4) {
                imgdata.data[x] = 255;
                imgdata.data[x+3] = 255;
            }
            for (var x = i + 4 * 30; x < i + 4 * 60; x += 4) {
                imgdata.data[x+2] = 255;
                imgdata.data[x+3] = 255;
            }
        }

        // Verify that putImageData is not affected by the current transform.
        c.translate(20, 0);
        c.putImageData(imgdata, 40, 0);
      }
    </script>
  </head>
  <body onload="draw();">
    <canvas id='c' width='100' height='50'></canvas>
  </body>
</html>