mirror of git://git.acid.vegas/asciiblaster.git
59 lines
1.1 KiB
JavaScript
59 lines
1.1 KiB
JavaScript
var dataUriToUint8Array = function(uri){
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var data = uri.split(',')[1];
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var bytes = atob(data);
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var buf = new ArrayBuffer(bytes.length);
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var u8 = new Uint8Array(buf);
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for (var i = 0; i < bytes.length; i++) {
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u8[i] = bytes.charCodeAt(i);
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}
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return u8
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}
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window.dataUriToBlob = (function(){
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/**
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* Blob constructor.
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*/
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var Blob = window.Blob;
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/**
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* ArrayBufferView support.
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*/
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var hasArrayBufferView = new Blob([new Uint8Array(100)]).size == 100;
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/**
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* Return a `Blob` for the given data `uri`.
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*
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* @param {String} uri
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* @return {Blob}
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* @api public
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*/
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var dataUriToBlob = function(uri){
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var data = uri.split(',')[1];
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var bytes = atob(data);
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var buf = new ArrayBuffer(bytes.length);
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var arr = new Uint8Array(buf);
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for (var i = 0; i < bytes.length; i++) {
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arr[i] = bytes.charCodeAt(i);
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}
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if (!hasArrayBufferView) arr = buf;
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var blob = new Blob([arr], { type: mime(uri) });
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blob.slice = blob.slice || blob.webkitSlice;
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return blob;
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};
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/**
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* Return data uri mime type.
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*/
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function mime(uri) {
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return uri.split(';')[0].slice(5);
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}
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return dataUriToBlob;
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})()
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