imgsplit/imgsplit.html at master · NathanJeanDevs/imgsplit · GitHub

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<!DOCTYPE html>
<html>
<head>
  <title>Img splitter</title>
  <style>
    body {
      background-color: #fff;
    }
    img {
      margin: 0px 10px;
    }
  </style>
</head>

<body>
  <div id="test"></div>

  <script type="text/javascript">
    var canvas = document.createElement('canvas'),
        ctx = canvas.getContext('2d'),
        parts = [],
        img = new Image();

    img.onload = split_4;

    function split_4() {
      var w2 = img.width / 2,
          h2 = img.height / 2;

      for(var i=0; i<4; i++) {
        var x = (-w2*i) % (w2*2),
            y = (h2*i)<=h2? 0 : -h2 ;

        canvas.width = w2;
        canvas.height = h2;

        ctx.drawImage(this, x, y, w2*2, h2*2);

        parts.push( canvas.toDataURL() );

        // for test div
        var slicedImage = document.createElement('img')
        slicedImage.src = parts[i];
        var div = document.getElementById('test');
        div.appendChild( slicedImage );

      }

      console.log( parts );

    }

    img.src = "data:image/png;base64,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";

  </script>
</body>

</html>