mirror of
https://github.com/photonstorm/phaser
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37 lines
1 KiB
JavaScript
37 lines
1 KiB
JavaScript
/**
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* @author Richard Davey <rich@photonstorm.com>
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* @copyright 2020 Photon Storm Ltd.
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* @license {@link https://opensource.org/licenses/MIT|MIT License}
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*/
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/**
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* Decode base-64 encoded data, for example as exported by Tiled.
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*
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* @function Phaser.Tilemaps.Parsers.Tiled.Base64Decode
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* @since 3.0.0
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*
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* @param {object} data - Base-64 encoded data to decode.
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*
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* @return {array} Array containing the decoded bytes.
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*/
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var Base64Decode = function (data)
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{
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var binaryString = window.atob(data);
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var len = binaryString.length;
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var bytes = new Array(len / 4);
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// Interpret binaryString as an array of bytes representing little-endian encoded uint32 values.
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for (var i = 0; i < len; i += 4)
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{
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bytes[i / 4] = (
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binaryString.charCodeAt(i) |
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binaryString.charCodeAt(i + 1) << 8 |
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binaryString.charCodeAt(i + 2) << 16 |
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binaryString.charCodeAt(i + 3) << 24
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) >>> 0;
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}
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return bytes;
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};
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module.exports = Base64Decode;
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