20 lines
350 B
JavaScript
20 lines
350 B
JavaScript
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'use strict';
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var gifRegexp = /^GIF8[79]a/;
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function isGIF (buffer) {
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var signature = buffer.toString('ascii', 0, 6);
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return (gifRegexp.test(signature));
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}
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function calculate(buffer) {
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return {
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'width': buffer.readUInt16LE(6),
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'height': buffer.readUInt16LE(8)
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};
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}
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module.exports = {
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'detect': isGIF,
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'calculate': calculate
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};
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