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PNG with watermark


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          <!DOCTYPE html>
<html>
<head>
  <meta charset="utf-8">
  <script src="../build/ogma.min.js"></script>
  <style>
    #graph-container { height: 300px; }
  </style>
</head>
<body>
  <div id="graph-container"></div>
  <hr />
  Image preview:<br />

<script>
'use strict';

function randomGraph(N, E) {
  var g = {nodes:[], edges:[]};

  for (var i = 0; i < N; i++) {
    g.nodes.push({
      id: 'n' + i,
      attributes: {
        x: Math.random() * 100,
        y: Math.random() * 100,
        text: 'Node ' + i
      }
    });
  }

  for (var i = 0; i < E; i++) {
    g.edges.push({
      id: 'e' + i,
      source: 'n' + (Math.random() * N | 0),
      target: 'n' + (Math.random() * N | 0),
      attributes: {
        text: 'Edge ' + i
      }
    });
  }

  return g;
}

var g = randomGraph(50, 50);

var ogma = new Ogma({
  graph: g,
  container: 'graph-container'
});

ogma.export.png({
  download: false,
  textWatermark: {
    content: 'CLASSIFIED',
    repeat: true,
    angle: 45,
    alpha: 0.2,
    space: 50
  },
  imageWatermark: {
    content: 'img/MI6.png'
  }
}).then(function(dataURL) {
  if (dataURL) {
    var img = document.createElement('img');
    img.src = dataURL;
    document.body.appendChild(img);
  }
});
</script>
</body>
</html>