Created
August 2, 2010 20:28
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| function show_pic() | |
| { | |
| var viewport = document.getElementById('viewport'); | |
| viewport.style.display = ""; | |
| var backdrop = document.getElementById('backdrop'); | |
| backdrop.style.display = "none"; | |
| // | |
| // This brings up the Camera App and gets the picture, and calls dump_pic() | |
| // with the picture data as a Base64-encoded string | |
| // | |
| navigator.camera.getPicture(dump_pic, fail, { quality: 50 }); | |
| } | |
| function dump_pic(data) | |
| { | |
| // push the data into a file: This should work, but it doesn't. | |
| // navigator.file.write('/sdcard/test_img.jpg', data, fail, fail); | |
| // | |
| // In actuality, the picture gets sent to /sdcard/Pic.jpg, but as far | |
| // as I can tell, this is not supported functionality cross-platform. | |
| // document.getElementById("test_img").src = "file:///sdcard/Pic.jpg"; | |
| // | |
| // | |
| // This actually pushes the base64-encoded data into an HTML <img> tag with | |
| // id=test_img. | |
| document.getElementById("test_img").src = "data:image/jpeg;base64," + data; | |
| // | |
| // This pushes the actual JPG data to HTML5 localstorage. | |
| localStorage.setItem("image01", decode64(data)); | |
| } | |
| // This decodes base64 data | |
| function decode64(input) { | |
| var output = new StringMaker(); | |
| var chr1, chr2, chr3; | |
| var enc1, enc2, enc3, enc4; | |
| var keyStr = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/="; | |
| var i = 0; | |
| // remove all characters that are not A-Z, a-z, 0-9, +, /, or = | |
| input = input.replace(/[^A-Za-z0-9\+\/\=]/g, ""); | |
| while (i < input.length) { | |
| enc1 = keyStr.indexOf(input.charAt(i++)); | |
| enc2 = keyStr.indexOf(input.charAt(i++)); | |
| enc3 = keyStr.indexOf(input.charAt(i++)); | |
| enc4 = keyStr.indexOf(input.charAt(i++)); | |
| chr1 = (enc1 << 2) | (enc2 >> 4); | |
| chr2 = ((enc2 & 15) << 4) | (enc3 >> 2); | |
| chr3 = ((enc3 & 3) << 6) | enc4; | |
| output.append(String.fromCharCode(chr1)); | |
| if (enc3 != 64) { | |
| output.append(String.fromCharCode(chr2)); | |
| } | |
| if (enc4 != 64) { | |
| output.append(String.fromCharCode(chr3)); | |
| } | |
| } | |
| return output.toString(); | |
| } |
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