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