TobiasSeitz/take-picture-mediaDevices.getUserMedia.html

## take-picture-mediaDevices.getUserMedia.html
<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8">
  <title>HTML5 Media Device Access</title>
  <meta name="viewport" content="width=device-width, initial-scale=1">
  <style>
    video, img {
      max-width:100%;
    }
  </style>
</head>
<body>

<video autoplay></video>

<script>
  (function() {
    'use strict';
    var video = document.querySelector('video')
      , canvas;

    /**
     *  generates a still frame image from the stream in the <video>
     *  appends the image to the <body>
     */
    function takeSnapshot() {
      var img = document.querySelector('img') || document.createElement('img');
      var context;
      var width = video.offsetWidth
        , height = video.offsetHeight;

      canvas = canvas || document.createElement('canvas');
      canvas.width = width;
      canvas.height = height;

      context = canvas.getContext('2d');
      context.drawImage(video, 0, 0, width, height);

      img.src = canvas.toDataURL('image/png');
      document.body.appendChild(img);
    }

    // use MediaDevices API
    // docs: https://developer.mozilla.org/en-US/docs/Web/API/MediaDevices/getUserMedia
    if (navigator.mediaDevices) {
      // access the web cam
      navigator.mediaDevices.getUserMedia({video: true})
      // permission granted:
        .then(function(stream) {
          video.src = window.URL.createObjectURL(stream);
          video.addEventListener('click', takeSnapshot);
        })
        // permission denied:
        .catch(function(error) {
          document.body.textContent = 'Could not access the camera. Error: ' + error.name;
        });
    }
  })();

</script>
</body>
</html>
	<!DOCTYPE html>
	<html lang="en">
	<head>
	<meta charset="UTF-8">
	<title>HTML5 Media Device Access</title>
	<meta name="viewport" content="width=device-width, initial-scale=1">
	<style>
	video, img {
	max-width:100%;
	}
	</style>
	</head>
	<body>

	<video autoplay></video>

	<script>
	(function() {
	'use strict';
	var video = document.querySelector('video')
	, canvas;

	/**
	* generates a still frame image from the stream in the <video>
	* appends the image to the <body>
	*/
	function takeSnapshot() {
	var img = document.querySelector('img') \|\| document.createElement('img');
	var context;
	var width = video.offsetWidth
	, height = video.offsetHeight;

	canvas = canvas \|\| document.createElement('canvas');
	canvas.width = width;
	canvas.height = height;

	context = canvas.getContext('2d');
	context.drawImage(video, 0, 0, width, height);

	img.src = canvas.toDataURL('image/png');
	document.body.appendChild(img);
	}

	// use MediaDevices API
	// docs: https://developer.mozilla.org/en-US/docs/Web/API/MediaDevices/getUserMedia
	if (navigator.mediaDevices) {
	// access the web cam
	navigator.mediaDevices.getUserMedia({video: true})
	// permission granted:
	.then(function(stream) {
	video.src = window.URL.createObjectURL(stream);
	video.addEventListener('click', takeSnapshot);
	})
	// permission denied:
	.catch(function(error) {
	document.body.textContent = 'Could not access the camera. Error: ' + error.name;
	});
	}
	})();

	</script>
	</body>
	</html>