61 lines
1.2 KiB
JavaScript
Executable file
61 lines
1.2 KiB
JavaScript
Executable file
var utils = require('../utils')
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, nodes = require('../nodes')
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, Image = require('./image');
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/**
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* Return the width and height of the given `img` path.
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*
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* Examples:
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*
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* image-size('foo.png')
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* // => 200px 100px
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*
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* image-size('foo.png')[0]
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* // => 200px
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*
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* image-size('foo.png')[1]
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* // => 100px
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*
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* Can be used to test if the image exists,
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* using an optional argument set to `true`
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* (without this argument this function throws error
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* if there is no such image).
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*
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* Example:
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*
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* image-size('nosuchimage.png', true)[0]
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* // => 0
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*
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* @param {String} img
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* @param {Boolean} ignoreErr
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* @return {Expression}
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* @api public
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*/
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function imageSize(img, ignoreErr) {
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utils.assertType(img, 'string', 'img');
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try {
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var img = new Image(this, img.string);
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} catch (err) {
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if (ignoreErr) {
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return [new nodes.Unit(0), new nodes.Unit(0)];
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} else {
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throw err;
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}
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}
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// Read size
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img.open();
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var size = img.size();
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img.close();
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// Return (w h)
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var expr = [];
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expr.push(new nodes.Unit(size[0], 'px'));
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expr.push(new nodes.Unit(size[1], 'px'));
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return expr;
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};
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imageSize.params = ['img', 'ignoreErr'];
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module.exports = imageSize;
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