web/filter_lab.html

<!DOCTYPE html>

<html>
  <head>
  	<meta charset="utf-8">
  	<meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>filter_lab</title>
    <link rel="stylesheet" href="res/filter_lab.css" />
  </head>

  <body>
    <div id="toolbar">
      <h1>Dart Image: Filter Lab</h1>
    </div>
    <div id="sidebar"></div>
    <div id="editor">
      <div class="contents">
        <select id="FilterType">
          <option>Sepia</option>
          <option>Sobel</option>
          <option>Vignette</option>
          <option>Pixelate</option>
          <option>Gaussian</option>
          <option>Adjust Color</option>
          <option>Color Offset</option>
        </select>
        <canvas id="filter_canvas"></canvas>
        <div id="log"></div>
      </div>
    </div>

    <script src="filter_lab.dart.js"></script>
  </body>
</html>