| 1 | <html> |
|---|
| 2 | <head> |
|---|
| 3 | <title>Image to data: url converter</title> |
|---|
| 4 | |
|---|
| 5 | <style> |
|---|
| 6 | body { |
|---|
| 7 | font-size: 12pt; |
|---|
| 8 | font-family: Georgia; |
|---|
| 9 | } |
|---|
| 10 | </style> |
|---|
| 11 | </head> |
|---|
| 12 | <body onload="document.getElementById('url').focus(); document.getElementById('url').value = '/images/logo.png'"> |
|---|
| 13 | |
|---|
| 14 | <div style="position: fixed; right: 5px; background-color: #eee; border: 2px solid #000; padding: 3px"> |
|---|
| 15 | <a href="http://www.rgraph.net" target="_blank"><i>Courtesy of www.rgraph.net</i></a> |
|---|
| 16 | </div> |
|---|
| 17 | |
|---|
| 18 | <h1>Image to data: url converter</h1> |
|---|
| 19 | |
|---|
| 20 | <i> |
|---|
| 21 | This only works for online images, which are on the [<script>document.write(location.host)</script>] domain. There's no server-side |
|---|
| 22 | scripting though, so feel free to put it on your website and use it there. |
|---|
| 23 | </i> |
|---|
| 24 | |
|---|
| 25 | <p /> |
|---|
| 26 | |
|---|
| 27 | URL: <input type="text" value="" id="url" /> |
|---|
| 28 | <button onclick="Go()">Go!</button> |
|---|
| 29 | |
|---|
| 30 | <p /> |
|---|
| 31 | |
|---|
| 32 | The data: url: |
|---|
| 33 | <textarea id="output" readonly style="width: 100%" rows="20" style="color: gray" onclick="this.select()">This is where the output URL goes...</textarea> |
|---|
| 34 | |
|---|
| 35 | <p /> |
|---|
| 36 | |
|---|
| 37 | A full image tag with the url as the src: |
|---|
| 38 | <textarea id="output_tag" readonly style="width: 100%" rows="20" style="color: gray" onclick="this.select()">This is where the image tag goes...</textarea> |
|---|
| 39 | |
|---|
| 40 | <p>The image itself using the data: url:</p> |
|---|
| 41 | <script> |
|---|
| 42 | function Go() |
|---|
| 43 | { |
|---|
| 44 | var url = document.getElementById("url").value; |
|---|
| 45 | var text = document.getElementById("output"); |
|---|
| 46 | var text_tag = document.getElementById("output_tag"); |
|---|
| 47 | var img = document.createElement('IMG'); |
|---|
| 48 | |
|---|
| 49 | img.src = url; |
|---|
| 50 | document.body.appendChild(img); |
|---|
| 51 | |
|---|
| 52 | /******************************************************* |
|---|
| 53 | * Create the canvas and paint the image onto it |
|---|
| 54 | *******************************************************/ |
|---|
| 55 | canvas = CreateCanvas(img); |
|---|
| 56 | |
|---|
| 57 | /******************************************************* |
|---|
| 58 | * Now use the .toDataURL() function to get the data: url |
|---|
| 59 | *******************************************************/ |
|---|
| 60 | var data = canvas.toDataURL(); |
|---|
| 61 | |
|---|
| 62 | /******************************************************* |
|---|
| 63 | * Populate the first text box |
|---|
| 64 | *******************************************************/ |
|---|
| 65 | text.value = data; |
|---|
| 66 | text.select(); |
|---|
| 67 | |
|---|
| 68 | /******************************************************* |
|---|
| 69 | * Populate the second text box |
|---|
| 70 | *******************************************************/ |
|---|
| 71 | text_tag.value = '<img src="' + data + '" width="' + img.offsetWidth + '" height="' + img.offsetHeight + '" alt="An image" />' |
|---|
| 72 | |
|---|
| 73 | /******************************************************* |
|---|
| 74 | * Add the image tag just created to the DOM |
|---|
| 75 | *******************************************************/ |
|---|
| 76 | img.src = data; |
|---|
| 77 | img.width = img.offsetWidth; |
|---|
| 78 | img.height = img.offsetHeight; |
|---|
| 79 | } |
|---|
| 80 | |
|---|
| 81 | /******************************************************* |
|---|
| 82 | * This function creates the canvas and appends it to the |
|---|
| 83 | * DOM |
|---|
| 84 | * |
|---|
| 85 | * @param img The image DOM object |
|---|
| 86 | *******************************************************/ |
|---|
| 87 | function CreateCanvas(img) |
|---|
| 88 | { |
|---|
| 89 | var canvas = document.createElement('CANVAS'); |
|---|
| 90 | var context = canvas.getContext('2d'); |
|---|
| 91 | |
|---|
| 92 | canvas.width = img.offsetWidth; |
|---|
| 93 | canvas.height = img.offsetHeight; |
|---|
| 94 | document.body.appendChild(canvas); |
|---|
| 95 | |
|---|
| 96 | /******************************************************* |
|---|
| 97 | * Now add the image to the canvas |
|---|
| 98 | *******************************************************/ |
|---|
| 99 | context.drawImage(img, 0, 0); |
|---|
| 100 | |
|---|
| 101 | /******************************************************* |
|---|
| 102 | * Move the canvas off-screen |
|---|
| 103 | *******************************************************/ |
|---|
| 104 | |
|---|
| 105 | canvas.style.position = 'absolute'; |
|---|
| 106 | canvas.style.left = (-1 * img.offsetWidth) + 'px'; |
|---|
| 107 | canvas.style.top = (-1 * img.offsetHeight) + 'px'; |
|---|
| 108 | |
|---|
| 109 | return canvas; |
|---|
| 110 | } |
|---|
| 111 | </script> |
|---|
| 112 | |
|---|
| 113 | </body> |
|---|
| 114 | </html> |
|---|
