| 1 | 'use strict';
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| 2 |
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| 3 |
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| 4 |
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| 5 | var str2arr = require('../common').str2arr;
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| 6 | var sliceEq = require('../common').sliceEq;
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| 7 | var readUInt16LE = require('../common').readUInt16LE;
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| 8 |
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| 9 |
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| 10 | var SIG_GIF87a = str2arr('GIF87a');
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| 11 | var SIG_GIF89a = str2arr('GIF89a');
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| 12 |
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| 13 |
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| 14 | module.exports = function (data) {
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| 15 | if (data.length < 10) return;
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| 16 |
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| 17 | if (!sliceEq(data, 0, SIG_GIF87a) && !sliceEq(data, 0, SIG_GIF89a)) return;
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| 18 |
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| 19 | return {
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| 20 | width: readUInt16LE(data, 6),
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| 21 | height: readUInt16LE(data, 8),
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| 22 | type: 'gif',
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| 23 | mime: 'image/gif',
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| 24 | wUnits: 'px',
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| 25 | hUnits: 'px'
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| 26 | };
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| 27 | };
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