forked from mirrors/gecko-dev
48 lines
1.4 KiB
JavaScript
48 lines
1.4 KiB
JavaScript
/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this file,
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* You can obtain one at http://mozilla.org/MPL/2.0/. */
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this.blobConverters = (function () {
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const exports = {};
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exports.dataUrlToBlob = function (url) {
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const binary = atob(url.split(",", 2)[1]);
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let contentType = exports.getTypeFromDataUrl(url);
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if (contentType !== "image/png" && contentType !== "image/jpeg") {
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contentType = "image/png";
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}
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const data = Uint8Array.from(binary, char => char.charCodeAt(0));
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const blob = new Blob([data], { type: contentType });
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return blob;
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};
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exports.getTypeFromDataUrl = function (url) {
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let contentType = url.split(",", 1)[0];
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contentType = contentType.split(";", 1)[0];
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contentType = contentType.split(":", 2)[1];
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return contentType;
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};
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exports.blobToArray = function (blob) {
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return new Promise((resolve, reject) => {
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const reader = new FileReader();
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reader.addEventListener("loadend", function () {
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resolve(reader.result);
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});
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reader.readAsArrayBuffer(blob);
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});
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};
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exports.blobToDataUrl = function (blob) {
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return new Promise((resolve, reject) => {
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const reader = new FileReader();
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reader.addEventListener("loadend", function () {
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resolve(reader.result);
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});
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reader.readAsDataURL(blob);
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});
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};
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return exports;
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})();
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null;
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